Miscellaneous Release - Data

Miscellaneous Releases - Data (MRD) are diskettes or CD's that are sold on their own and that contain data (usually geochemical in nature) which may or may not have been previously released in a report or map format. The files on the diskette or CD generally contain tables that have appeared either "as is" (e.g., KLIP data) or formed the basis for graph or map plots (e.g., BRiM data) in an existing publication. To keep costs to clients as low as possible and to avoid giving clients more than they really would like, the diskettes or CD's will not be sold with the parent report or map. They can only be purchased separately. The first 14 numbers were assigned to data sets of this type which had been released previously but never assigned to a publication series.

MRD 1 – Black River Matheson (BRiM) Data, 1989

Data for overburden samples, collected in the BRiM area from the 1984, 1985, 1986, 1987 and 1988 sonic drilling and backhoe trenching programs, have been published as Geophysical/Geochemical Series Maps 80 759 to 80 796, 80 838 to 80 893, 81 099 to 81 137, and 81 146 to 81 170. These data are available as a series of either dBase IV^® or ASCII-text files. Sample locations and material types, mineralogical, geochemical and lithological analyses are provided. Documentation included describes individual file contents and formats. Available on one CD-ROM. $20.00.

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MRD 2 – Hanes Lake Area Geochemical Survey, 1990

Data for overburden samples, collected in the BRiM area from the 1984, 1985, 1986, 1987 and 1988 sonic drilling and backhoe trenching programs, have been published as Geophysical/Geochemical Series Maps 80 759 to 80 796, 80 838 to 80 893, 81 099 to 81 137, and 81 146 to 81 170. These data are available as a series of either dBase IV^® or ASCII-text files. Sample locations and material types, mineralogical, geochemical and lithological analyses are provided. Documentation included describes individual file contents and formats. Available on one CD-ROM. $20.00.

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MRD 3 – Herman Lake Area Geochemical Survey Data, 1990

Geochemical data for water and lake sediment samples collected in the Herman Lake area in the Michipicoten greenstone belt in 1987 and 1988 have been published as eophysical/Geochemical Series Map 80 804. The database is available as either WK1 spreadsheet or ASCII-text files. Sample-site codes, co-ordinates, field data, geology, loss-on-ignition, 35-element geochemical data analyses, global (provincial) data, quality control data, and Tables 2 to 5 are provided. Documentation included on each diskette describes individual file contents and formats. Available on one CD-ROM. $20.00.

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MRD 4 – Kirkland Lake Incentive Program (KLIP) Data, 1990

Data for overburden and bedrock samples collected as part of the Kirkland Lake Incentives Program (KLIP). These data have been previously published in Open File Reports 5335, 5355, 5356, 5394, 5395 and 5456, and are available as either dBase IV^® or ASCII text files. Data files include drill hole location information, sample intervals and material types, overburden and bedrock descriptions, trace element geochemical data for overburden and bedrock samples, and mineralogy data for the mid-density and heavy mineral fractions. Documentation included describes individual file contents and formats. Available on one CD-ROM. $20.00

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MRD 5 – Trout Lake Area Geochemical Survey, 1990

Geochemical data for water and lake sediment samples collected in the Trout Lake area in the Batchawana greenstone belt in 1986, 1987 and 1988 have been published as Geophysical/Geochemical Series Map 80 803. The database is available as either WK1 spreadsheet or ASCII-text files. Sample-site codes, co-ordinates, field data, geology, loss-on-ignition, 35-element geochemical data analyses, global (provincial) data and quality control data are provided. Documentation included on each diskette describes individual file contents and formats in an ASCII file (read.me). Available on one CD-ROM. $20.00

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MRD 6 – Montreal River Area Geochemical Survey, 1991

Geochemical data for water and lake sediment samples collected in the Montreal River area in the Batchawana greenstone belt in 1988 have been published as Geophysical/Geochemical Series Map 80 808. The database is available as either WK1 spreadsheet or ASCII-text files. Sample-site codes, co-ordinates, field data, geology, loss-on-ignition, 35-element geochemical data analyses, global (provincial) data, quality control data, and Tables 2, 3, 6 and 7 are provided. Documentation included on each diskette describes individual file contents and formats. Available on one CD-ROM. $20.00

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MRD 7 – Pancake Lake Area Geochemical Survey, 1991

Geochemical data for water and lake sediment samples collected in the Pancake Lake area in the Batchawana greenstone belt in 1988 have been published as Geophysical/Geochemical Series Map 80 807. The database is available as either WK1 spreadsheet or ASCII- text files. Sample-site codes, co-ordinates, field data, geology, loss-on-ignition, 35-element geochemical data analyses, global (provincial) data, quality control data, and Tables 2, 3, 6 and 7 are provided. Documentation included describes individual file contents and formats. Available on one CD-ROM. $20.00

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MRD 8 – Till Sampling Survey, Fort Frances Area, 1991

Geological and geochemical data for samples from the Fort Frances Area Till Sampling Survey have been published in Study 56. The database is available as either WK1 spreadsheet or ASCII-text files. Descriptive logs from sonic drilling, penetration logs, sampling co-ordinates, sampling intervals for borehole samples, fine fraction and heavy mineral fraction geochemical data, quality control geochemical data, heavy mineral weight data, gold grain data, heavy mineral identification data, and pebble count, grain size and carbonate data are provided. Documentation on each diskette describes individual file contents and formats in an ASCII file (read.me). Data on the diskette are in the form of a self-extracting Lharc file [(c) Yoshi, 1989]. Available on one CD-ROM. $20.00

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MRD 9-REV – Lake Sediment Geochemical Survey of the Cow River Area, Batchawana Greenstone Belt

The results of this study, previously released as Open File Report 5917 and MRD 9, highlighted several significant anomalies of zinc, cadmium, copper and lead. The area around the Percy Lake Zn-Cd-Pb lake sediment anomaly was resampled at a higher density to further refine the metal anomaly in lake sediments. The previously released data have been supplemented with these new analyses and replaces the data previously released on MRD 9. The data include sample site codes, Universal Transverse Mercator (UTM) co-ordinates (provided in North American Datum 1927 (NAD27), Zone 17), field data, loss-on-ignition analyses, geochemical analyses and quality-control data. Available on one CD-ROM. $20.00

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MRD 10 – Lake Sediment Geochemical Survey of the Opapimiskan Lake Area

Geochemical data for humus samples collected in the Lake Opapimiskan area in the North Caribou Greenstone Belt have been published as Geophysical/Geochemical Series Map 80 801. This data base, as well as previously unpublished lake sediment and lake water geochemical data for this area, is available as either ASCII or WK1 spreadsheet format. The database includes sample-site codes, UTM co-ordinates, field data, geology, loss-on-ignition, geochemical data analyses, and quality control data. Documentation describes individual file formats. Available on one CD-ROM. $20.00

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MRD 11 – Bedrock Geology of the Whiskey Lake Greenstone Belt - Digital Map

Compilation by M. Byron and R.E. Whitehead, Centre in Mining and Mineral Exploration Research, Laurentian University. This 1:50 000 scale digital map is available in AutoCAD^® .DWG format. Available on one CD-ROM. $20.00

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MRD 12 – Heavy Mineral, Particulate Gold and Au Analytical Results, Surficial Sediment Sampling Program, Swayze Greenstone Belt, Northern Ontario, District of Timmins, 1992-94

Compilation by M. Byron and R.E. Whitehead, Centre in Mining and Mineral Exploration Research, Laurentian University. This 1:50 000 scale digital map is available in AutoCAD^® .DWG format. Available on one CD-ROM. $20.00

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MRD 13 – Results of Overburden Sampling for Kimberlite Heavy Mineral Indicators and Gold Grains, Michipicoten River - Wawa Area, Northeastern Ontario

Geological and geochemical data for samples from the Michipicoten River-Wawa areas have been published as Open File Report 5908. The database is now available as WK1 spreadsheet and ASCII-text files. Data files include: a) sample site locations and descriptions; b) sample processing data that includes all table feeds, non-magnetic and magnetic fraction weights; c) unprocessed kimberlite indicator mineral picks (prior to microprobe analysis) and gold grain counts; d) microprobe data for kimberlite indicator minerals; e) detailed gold grain summary including gold grain diameter, thickness and state of preservation. Documentation describes individual file contents and formats in an ASCII text (read.me) file. Available on one CD-ROM. $20.00

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MRD 14 – The Geochemical Map of Ontario Pilot Project, Part I: Report on the 1992 80th Meridian Traverse

Geochemical data for soil, stream sediment, lake sediment and water from the 1992 80th meridian traverse have been published in Open File Report 5907. The database is now available in either .WK1 spreadsheet files or ASCII text files. The sediment datasets include sample numbers, UTM co-ordinates, loss-on-ignition, quality control data and analytical data for 44 elements. The water dataset includes sample numbers, UTM co-ordinates, lake depth, pH, quality control data and analytical data for 24 elements. Documentation is included in an ASCII text (read.me) file which describes individual file contents and formats. Available on one CD-ROM. $20.00

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MRD 15 – Till, Humus and B-horizon Soil Geochemical Database, Surficial Sediment Sampling Program, Swayze Greenstone Belt, Northern Ontario (1992-1994)

Available in digital form are geochemical data for till, humus and B-horizon soil from the 1992 94 surficial sediment survey of the Swayze greenstone belt. The 3 geochemical datasets include: sample codes; sample-site coordinates (UTM); ICP OES analytical data for 28 elements; INAA analytical data for 34 elements; CV AAS analytical results for Hg and quality control data. The till dataset also includes sample description and sampling depth information. The data are available as either ASCII text or WK1 spreadsheet files. Documentation describes individual file contents and formats in an ASCII file (read.me). PKUNZIP and instructions are included. Available on one CD-ROM. $20.00

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MRD 16 – Ontario Kimberlite Heavy Mineral Indicator Data Release

Kimberlite heavy mineral indicator data for overburden samples from: a) Attiwapiskat/Fort Albany; b) Fort Frances; c) Michipicoten River; d) Separation Lake; e) Sudbury basin; f) Swayze greenstone belt; g) West Bay; and h) Western Berens River areas have been published in Open File Report 5934 (this release). The data release consists of: a) 1 text file containing descriptive information (ASCII); b) 3 graphic files (.dxf); and c) 2 ASCII text files summarizing data by study area. The first data file consists of sample description data including sample site number, locations given by UTM coordinates, material type collected, and sample processing data. This data includes the weights of: a) table split; b) >2 mm and table feed (<2mm); c) total heavy mineral concentrate; d) methylene iodide light fraction; e) non-magnetic heavy mineral fraction; and g) magnetic heavy mineral fraction. It also summarizes any potential kimberlite indicator minerals identified. The second data file summarizes all microprobe data from the Ontario Geoscience Laboratories on kimberlite indicator minerals. Available on one CD-ROM. $20.00

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MRD 17 – Preliminary Results from the Murray Lake Project: A Detailed Lake Sediment Geochemical Survey in the Central Michipicoten Greenstone Belt East of Wawa, Ontario

Lake sediment geochemical data released as part of OFR 5932 is available in digital format. Available on one CD-ROM. $20.00

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MRD 18 – Ternary Plots Using Lotus 1-2-3^®

Triangle.WK1 is a LOTUS 1-2-3^® template program which recalculates the values of three elements into triangular co-ordinates, allowing plotting of the triangle graphs or ternary plots used in geological classification schemes. The graphing capabilities of LOTUS 1-2-3^® are used to draw the diagram on which the data are plotted. The blank triangular diagram provided can be modified to include the field boundaries and apex labels of any classification scheme. Five are included: two for sandstones (Folk, 1968, Dott, 1984), one for felsic plutonic rocks (Streickeisen, 1976), one for ultramafic rocks (IUGS, 1973) and one for volcanic rocks (Jensen, 1976). This program was originally published in Geobyte (Mustard and Richardson, 1990, p.1-7). As a service to potential clients and the geological community, this program and a Geobyte reprint are available for the cost of the diskette. Available on one CD-ROM. $20.00

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MRD 19 – Analytical Data for Nipissing Intrusions

Available in digital form are complete analytical data of Nipissing intrusions sampled for Study 58 (this release) and by Conrod (1988, 1989). Analyses are arranged in order of location and rock type. The data are presented in both tab-delimited ASCII and XLS formats. Available on one CD-ROM. $20.00

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MRD 20 – Kimberlites of the Lake Timiskaming Structural Zone

Microprobe data on kimberlite indicator minerals from 17 kimberlite pipes found along the Lake Timiskaming Structural Zone are available on diskette. The mineral data are predominantly on garnet, chromite and ilmenite. There are more limited data on Cr-diopside and olivine for several of the kimberlite pipes. The microprobe data are the product of an investigation of kimberlite occurrences throughout the province and the analytical work was completed in the laboratory of the Ontario Geological Survey. The data are to accompany Open File Report 5937 describing the kimberlites found along the Lake Timiskaming Structural Zone. Available on one CD-ROM. $20.00

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MRD 21 – Geochemical and Heavy Mineral Data, Surficial Sediment Sampling Program, Separation Lake Area, Northwestern Ontario

This release consists of geochemical data derived from humus samples and B and C horizon till samples, gold grain data determined from bulk C horizon till samples, Metamorphosed Massive Sulphide Indicator Minerals (MMSIMs) data determined from bulk C horizon till samples and geochemistry of gahnite and selected garnet minerals isolated from bulk C horizon till samples. The data release consists of: a) a text file containing descriptive information (ASCII); b) 18 CorelDraw drawing files (.cdr) c) 8 graphic files (.xls) of tabled data; and d) ASCII text files summarizing the different data sets. Data sets consist of: a) summary of sample site numbers, locations (UTM coordinates) and material type collected; b) quality control data; c) humus geochemistry; d) till "B" horizon geochemistry; e) till "C" horizon geochemistry; f) till pebble data; g) detailed gold grain summary; h) MMSIMs data summary; and i) gahnite and garnet mineral geochemistry. Data to accompany OFR 5939. Available on one CD-ROM. $20.00

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MRD 22 – Grade-Tonnage Data for the Mineral Deposit Models Described in Open File Report 5945

Grade-tonnage data for the 16 mineral deposit models described in OFR 5945 (this release) are available as Excel files. Available on one CD-ROM. $20.00

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MRD 23 – Results of Modern Alluvium Sampling for Kimberlite Indicator Minerals and Gahnite, Kinniwabi Lake Area, Northeastern Ontario: Data Release

This release consists of data related to kimberlite indicator minerals and gahnite derived from modern alluvium samples collected in the Kinniwabi Lake area, northeastern Ontario. This data release consists of 2 ASCII text files summarizing the different data sets. The first ASCII text file (KIMDATA.csv) presents data on the kimberlite indicator minerals and consists of: a) sample site locations; b) sample processing data; c) summary of kimberlite indicator mineral counts; d) kimberlite indicator mineral picking remarks; and e) summary of microprobe data for kimberlite indicator minerals. The second ASCII text file (GAHNITE.csv) consists of: a) sample site locations; and b) summary of microprobe data for gahnite. Data to accompany OFR 5956. Available on one CD-ROM. $20.00

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MRD 24 – Till Compositional Database, Peterlong Lake Radisson Lake Area, Southern Abitibi Subprovince

Digital data containing compositional information on till samples collected from the Peterlong Lake-Radisson Lake area of the southern Abitibi Subprovince is being released in conjunction with Open File Report 5941 (this release). The data set contains: 1) sample location information in UTM coordinates; 2) heavy mineral weight data for till; 3) gold grain size and shape data for till; and 4) INAA and ICP geochemical data for the -63 micron size fraction of till. These files are available as WK1 files in compressed file format. File decompression instructions are included. These data complement lake water geochemical data (MRD 25) and lake sediment geochemical data (MRD 27). Available on one CD-ROM. $20.00

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MRD 25 – Lake Water Geochemical Database; Peterlong Lake-Radisson Lake Area, Southern Abitibi Subprovince

Digital data containing geochemical information on lake water samples collected in the Peterlong Lake-Radisson Lake area, southern Abitibi Subprovince are being released. The data diskette contains: 1) sample location information in UTM coordinates; 2) field observations and measurements; and 3) ICP geochemical data for lake waters. These data complement till geochemical data released as MRD 24, lake sediment data released as MRD 27, and Open File Report 5942. Available on one CD-ROM. $20.00

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MRD 26 – Lake Sediment Geochemical Data from the Wawang Lake-English River Lake Sediment Survey, Wabigoon Subprovince, East of Ignace Ontario

Geochemical data for lake sediment and water collected from the Wawang Lake English River area of the Wabigoon Subprovince are being released in conjunction with Open File Report 5940. The lake sediment data set includes sample numbers, UTM co-ordinates, loss-on-ignition data, quality control data, and analytical data for 53 elements. The water data set includes UTM co-ordinates, pH, conductivity, dissolved oxygen, oxidation-reduction potential and salinity. Documentation is included in an ASCII text (read.me) file which describes individual file contents. Available on one CD-ROM. $20.00

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MRD 27 – Lake Sediment Geochemical Database; Peterlong Lake-Radisson Lake Area, Southern Abitibi Subprovince

Digital data containing geochemical information on lake sediment samples collected from the Peterlong Lake-Radisson Lake area of the southern Abitibi Subprovince are being released in conjunction with Open File Report 5942. The data set contains: 1) sample location information in UTM coordinates; 2) field observations and measurements; and 3) ICP and INAA geochemical data for lake sediments. These data are available as WK1 fields in compressed file format. This data complements till and lake water geochemical data (MRDs 24, 25, respectively;). Available on one CD-ROM. $20.00

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MRD 28 – Lithogeochemistry of the Hemlo Gold Deposit Area

Lithogeochemical data from the Hemlo gold deposit area presented in Table 4a of previously released Open File Report 5877 are available on one CD-ROM. as 1 file in .xls format. $20.00

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MRD 29 – Till Compositional Database, Matachewan Area, Southern Abitibi Subprovince

Digital data containing compositional information on till samples collected from the Matachewan area of the southern Abitibi Subprovince is being released in conjunction with Open File Report 5957. The data set contains: 1) sample location information in UTM coordinates; 2) heavy mineral weight data for till; 3) gold grain size and shape data for till; and 4) INAA and ICP geochemical data for the -63 micron fraction of till. These files are available as .WK1 files. Available on one CD-ROM. $20.00

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MRD 30 – Analytical Data for Geochemistry of the Main Mass, Sublayer, Offsets and Inclusions from the Sudbury Igneous Complex, Ontario - Tables 5, 6 and 7

This MRD includes several hundred analyses of both major elements and traces in Excel 5 format. The data represent Tables 5, 6, and 7 from Open File Report 5959 and are released in digital form because of their length. The tables comprise about 60 legal size pages of data providing the detailed analytical data behind a major reinterpretation of Sudbury Igneous Complex geochemistry. Available on one CD-ROM. $20.00

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MRD 31 – Lake Sediment and Water Geochemical Data from a Survey of 32 Geographic Townships in the Montreal River Headwaters Area, Centred on Gowganda, Ontario

Geochemical and quality control data for lake sediment and water collected from a survey of 32 geographic townships in the Montreal River headwaters area are being released in conjunction with Open File Report 5962. Data are available as self-extracting zip files in .wk1 file format.

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MRD 32 – Chemical Analyses of Minerals and Rocks of the Berens River Area

Digital data containing chemical analyses of minerals and rocks of the Berens River area, northwest Ontario, are being released in conjunction with Open File Report 5963. The data are available as Excel 7.0 and Excel 5.0/95 Workbook (.xls) files along with README files in Word 7.0 and 6.0/97. Available on one CD-ROM. $20.00

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MRD 33 – Lake Sediment and Water Geochemical Data from the Schreiber-Terrace Bay Area, Northwestern Ontario

Geochemical and quality control data for lake sediment and water collected from a survey of 1222 lakes in the Schreiber-Terrace Bay area are being released in conjuction with Open File Report 5964. Data are available as self-extracting zip files in .wk1 file format. Available on one CD-ROM. $20.00

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MRD 34 – Heavy mineral indicator database derived from overburden, for kimberlite, massive magmatic sulfides and gold, Kapuskasing area, northeastern Ontario

This release consists of data related to kimberlite indicator minerals, massive magmatic sulfide indicator minerals and gold grains recovered from modern alluvium, till, glaciofluvial and glaciolacustrine samples collected in an area south of Kapuskasing, northeastern Ontario. This data release consists of 10 sets of data stored as both tab delimited ASCII (.txt) and Microsoft Excel (.xls) files. Data sets consist of: 1) definitions of abbreviations used in each of the data files (KAPINTRO); 2) sample site locations (KAPAPPA); 3) pebble data summary (KAPAPPB); 4) sample processing data (KAPPAPPC); 5)detailed gold grain summary (KAPAPPD); 6) summary of kimberlite indicator mineral (KIMs) counts (KAPAPPE); 7) summary of massive magmatic sulfide indicator mineral (MMSIMs) counts (KAPAPPF); 8) summary of microprobe data for KIMs (KAPAPPG); 9) summary of microprobe data for gahnite (KAPAPPH); and 10) heavy mineral picking remarks (KAPAPPI). Data to accompany OFR 5967. Available on one CD-ROM. $20.00

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MRD 35 – Lake sediment and water geochemical data from the Hemlo–Heron Bay–White Lake area, Northwestern Ontario

Geochemical and quality control data for lake sediment and water collected from a survey of 211 lakes in the Hemlo–Heron Bay–White Lake area are being released in conjuction with Open File Report 5968. Data are available in .wk1 file format. Available on one CD-ROM. $20.00

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MRD 36 – Geological Compilation of the Timmins Area, Abitibi Greenstone Belt

This geological compilation of the Timmins area, being released in conjunction with Preliminary Map P.3379, is the first of four 1:100 000 maps and GIS data sets of the Abitibi Subprovince in Ontario being compiled over the next few years. The Timmins map covers most of the following nine NTS sheets: 42 A/5, 6, 11, 12, 13, 14 and 42 B/8, 9, 16. Data is available in both ArcView 3.0 and AutoCad v.12 format on one CD-ROM. Details on the ArcView and AutoCad data sets are provided in a readme.txt file. Available on one CD-ROM. $20.00

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MRD 37 – Ontario Geological Survey Poster Displays—PDAC March 1998

The Ministry of Northern Development and Mines is releasing selected Ontario Geological Survey Poster Displays from the March 1998 Prospectors and Developers Association of Canada (PDAC) annual convention in Toronto, Ontario. The poster images are unedited and are stored on a CD-ROM as Adobe^® PDF files. The images should be opened on a computer system running Windows 95^®, NT 4^® or MAC OS^® to read the long file names. The recommended system should have a minimum processing speed of 133 MHz with 32 Mb RAM and at least a 256-colour display adapter.The PDF files can be viewed using Adobe Acrobat Reader^®. This software is supplied free of charge "as is" on the CD for the following operating systems: Windows 3.X (16 bit), Windows 95^® and NT 4^® (32 bit), and MAC OS^®. A README file containing installation notes is included on the CD. Available on one CD-ROM. $20.00

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MRD 38 – Miscellaneous Database Related to the Separation Lake Quaternary Geology Mapping Project, Northwestern Ontario

This release consists of 11 data sets related to the Separation Lake Quaternary geology mapping project, northwestern Ontario (Open File Report 5980). Data sets consist of: 1) summary of striae orientations (APPA); 2) grain size data for till "B" and "C" horizon material (APPB); 3) till pebble lithology data for regional and orientation surveys, listed by percent (APPC); 4) summary of remarks for heavy mineral picking by terrain type (APPD); 5) summary of heavy mineral grains recovered (APPE); 6) grain size data for fine-grained glaciolacustrine material (APPF); 7) summary of geochemical analysis for fine-grained glaciolacustrine material (APPG); 8) summary of the clay mineralogy for fine-grained glaciolacustrine material (APPH); 9) grain size data for coarse-grained glaciolacustrine materials (APPI); 10) pebble lithology data for coarse-grained glaciolacustrine material (APPJ); and 11) metamorphosed magmatic sulphide indicator minerals (APPK). These data sets are available as tab-delimited ASCII text (.txt) and Excel 97 (.xls) files. Available on one CD-ROM. $20.00

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MRD 39 – Beaverton Area Quaternary Geology Attributed Map, Southern Ontario

This "attributed" map is made up of a variety of CAD, database and GIS data files from a Quaternary Geology mapping project in the Beaverton area. It is a collection of surface and sub-surface geological and geochemical data that may be usefully employed by GIS-knowledgeable geoscientists and planners. This attributed map was preceded by the hard copy-only Ontario Geological Survey Map 2560, Quaternary Geology, Beaverton Area.

This release contains the geological polygon and line information from the already-published paper map, as an ArcView^® v. 3.1 project, MicroStation 95^® files and AutoCAD^® R.12 dwg and dxf files. It also contains a polygon attribute database that can be used with MicroStation, and a "points" database of spatially referenced geological observations and sample data collected at numerous locations or "stations" while mapping. The databases are provided as Microsoft Access 97^® databases and as comma-delimited ASCII files. Documentation is provided in Microsoft's rich text format, as ASCII files, and in a Microsoft Powerpoint^® slide show. These data comprise 43 files in eight folders totalling 36 Mb. Available on one CD-ROM. $20.00

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MRD 40 – Summary of Geochemical, Heavy Mineral and Pebble Lithology Data, Surficial Sediment Program, Wawa Region, Northeastern Ontario

Digital data containing compositional information on till and modern alluvium samples collected from the Wawa, Ontario, region is being released in conjunction with OFR 5981. Data sets include: 1) definitions of abbreviations used in each of the data files (Intro); 2) sample site locations (AppA); 3) analytical methods, multi-element suites and detection limits used in the geochemical analyses of humus, "B" horizon till and "C" horizon till (AppB); 4) standard and duplicate geochemical analysis summary (AppC); 5) humus geochemistry summary (AppD); 6) till "B" horizon geochemistry summary (AppE); 7) till "C" horizon geochemistry (AppF); 8) till sample processing data (AppG); 9) heavy mineral picking remarks (AppH); 10) summary of kimberlite indicator counts for till material (AppI); 11) summary of microprobe data for kimberlite indicator minerals (AppJ); 12) summary of metamorphosed magmatic indicator counts for till (AppK); 13) summary of microprobe data for gahnite (AppL); 14) detailed gold grain summary (AppM); and 15) summary of pebble data (AppN). The files are available as both tab-delimited ASCII (.txt) and Microsoft Excel (.xls) files. Available on one CD-ROM. $20.00

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MRD 41 – Kimberlite, Base Metal and Gold Exploration Targets Based upon Heavy Mineral Data Derived from Surface Materials, Opasatika Lake Area, Northeastern Ontario

Digital data containing compositional information on modern alluvium, glaciolacustrine and till samples collected during the summer of 1998 in the Opasatika Lake area, near Kapuskasing, Ontario, is being released in conjunction with OFR 5982. The data includes: a) heavy mineral data; b) mineral compositions of kimberlite indicator minerals (KIMs); c) mineral compositions of metamorphic magmatic/massive sulphide indicator minerals (MMSIMs^®); and d) pebble lithology data. Data sets consist of: 1) definitions of abbreviations used in each of the data files (Intro); 2) sample site locations (AppA); 3) pebble data summary (AppB); 4) sample processing data (AppC); 5) detailed gold grain summary (AppD); 6) summary of kimberlite indicator minerals counts (AppE); 7) summary of metamorphosed magmatic/massive sulphide indicator mineral counts (AppF); 8) summary of microprobe data for KIMs (AppG); 9) summary of microprobe data for metamorphosed magmatic/massive sulphide indicator minerals (AppH); 10) summary of microprobe data for non-kimberlite indicator minerals (AppI); 11) heavy mineral picking remarks (AppJ); 12) summary of secondary metamorphosed magmatic/massive sulphide indicator mineral counts (AppK). These files are available as both tab-delimited ASCII (.txt) and Microsoft Excel (.xls) files. Available on one CD-ROM. $20.00

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MRD 42 – Geochemical Analyses of Altered and Unaltered Rocks of the Hemlo Gold Deposit Area

Digital data containing chemical analyses of rocks of the Hemlo gold deposit area, previously published in hardcopy form as Table 4a in Report 289 (Precambrian Geology, Hemlo Gold Deposit Area, 1997, by T.L. Muir), are now available in digital format. Data include sample locations in UTM coordinates, as well as major and common trace element values. Samples are grouped by rock type and include mineralized and ore-grade specimens. Table 4b in Report 289 provides some rationale for the sampling and qualitative comments regarding the type and degree of alteration of the sampled rocks. The data are available as Excel 97 (.xls) and tab-delimited ASCII text (.txt) files. Available on one CD-ROM. $20.00

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MRD 43 – Lake Sediment and Water Geochemical Data from the Atikokan-Lumby Lake Area, Northwestern Ontario

Geochemical and quality control data for lake sediment and water collected from a survey of 2129 lake sites in the Atikokan-Lumby Lake area are being released in conjunction with Open File Report 5986. Data are available as zip files in .wk1 file format. Available on one CD-ROM. $20.00

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MRD 44 – Till and Humus Compositional Database, Eastern Part of the Shebandowan Greenstone Belt, Northwestern Ontario

Digital data containing compositional information on till and humus samples collected from the eastern part of the Shebandowan greenstone belt, northwestern Ontario is being released in conjunction with Open File Report 5993. The data set contains: 1) sample location information in UTM coordinates (NAD83 projection); 2) heavy mineral weight data for till; 3) gold grain counts, including size and shape data for till; 4) sulphide and oxide mineral counts for till; 5) INAA and ICP geochemical data for the -63 micron fraction of till and the –177 micron fraction of humus; and 6) INAA and ICP geochemical data for float boulders. These files are available as .WK1 files. Available on one CD-ROM. $20.00

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MRD 45 – Heavy Mineral Indicator Database Derived from Overburden for Kimberlite, Metamorphosed Magmatic Massive Sulphides and Gold, Stull Lake Area, Northwestern Ontario

This release consists of data related to kimberlite indicator minerals (KIM), metamorphosed magmatic massive sulphide indicator minerals (MMSIM^®) and gold grains recovered from beach, till, modern alluvium and glaciolacustrine samples collected in the Stull Lake area of northwestern Ontario. Data sets consist of: 1) project description and definition of abbreviations; 2) sample locations and material descriptions; 3) sample processing data; 4) summary of KIM counts; 5) detailed gold grain summary; 6) gold grain shape classification; 7) heavy mineral picking remarks; 8) summary of MMSIM counts; and 9) summary of microprobe data for KIM. Nine sets of data are included in both tab delimited, ASCII (.txt) and Microsoft Excel 97 (.xls) files in compressed file format. In addition to this, Dataset 1 is also available in Microsoft Word 6.0 for Windows 95 format. File decompression instructions are included. Available on one CD-ROM. $20.00

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MRD 46 – Geological Compilation of the Lake Abitibi Area, Abitibi Greenstone Belt

This geological compilation of the Lake Abitibi area, being released in conjunction with Preliminary Map P.3398, is the second of a series of 1:100 000 maps and GIS data sets of the Abitibi Subprovince in Ontario being compiled over the next few years. The Lake Abitibi map covers some or all of the following nine NTS sheets: 32 D/5, 12, 13; 42 A/7, 8, 9, 10, 15, 16. Data is available in both ArcView^® 3.0 and 3.1 formats. ArcExplorer^® has been provided to view and query the ArcView data. In addition, AutoCAD^® v.12, v.13 and v.14 DXF and DWG formats have been provided on the same CD-ROM. Details of the ArcView and AutoCad data sets are provided in a readme.txt file as well as a more comprehensive metadata file. The data is available on one CD-ROM. $20.00.

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MRD 47 – Selected Geoscience Data from the NODA Swayze Greenstone Belt GIS Database Project, Superior Province, Ontario

This digital compilation of data contains a wide range of geoscience information collected over the Swayze greenstone belt using geographic information system (GIS) technology. The compilation was jointly produced by the Geological Survey of Canada and the Ontario Geological Survey, with contributions from Falconbridge Limited, and Noranda Mines and Exploration Inc. The Swayze compilation covers all or parts of the following eight NTS sheets: 41 O/8,9,10,15,16; 41 P/5,12,13. Data in this compilation includes geology, geophysics, Quaternary geology, lithogeochemistry, mineral occurrences, digital topography and diamond drillhole information, and is available in a variety of formats including ArcInfo^®, ArcView^®, ArcExplorer^®, MapInfo^® and ASCII. Details of the data sets, including marginal notes, data structure and legends, is provided in ArcView^®, ASCII, Microsoft Word^® and HTML file formats. For PC users, a free data viewer, ArcView Data Publisher^®, is included on the CD. The data is available on 2 CD-ROMs at a cost of $40.00.

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MRD 48 – Selected Posters Summarizing Research Results from the Swayze Greenstone Belt Geoscience NODA Project

This CD-ROM contains twenty posters produced in digital format as part of the Swayze greenstone belt geoscience project funded under the Northern Ontario Development Agreement (NODA). The research was undertaken by a number of geoscientists from the Geological Survey of Canada, the Ontario Geological Survey, Falconbridge Limited, and Noranda Mines and Exploration Inc. Poster data is provided in Adobe Acrobat^® PDF file format. Adobe Acrobat^® is supplied with this CD-ROM. The abstracts for each poster are provided in ASCII TXT file format. The data is available on one CD-ROM at a price of $20.00.

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MRD 49 – Lithologic, Geochemical And Geophysical Data From Paleozoic Bedrock Drilling Project, North Lake Simcoe Area, South-Central Ontario

This digital data release contains lithologic, geochemical and geophysical data obtained in the 1993 Paleozoic bedrock drilling project that was conducted in the north Lake Simcoe area, of south-central Ontario. These data are published in OGS Open File Report 5999. This drilling project was part of a larger regional mapping study investigating alkali-carbonate reactive aggregate sources in the Ordovician bedrock of the north Lake Simcoe area. The files in this release consist of 1) a README.txt file explaining the contents of the disk; 2) two tables (in Micosoft^® Word 7.0 format) from the main body of OFR 5999, which present drill hole location information and a list of the abbreviations used; 3) lithologic logs as presented in Tables 1 through 12 of Appendix 1 of OFR 5999 (as zipped Excel 7.0 files); 4) geochemical data and sample locations and descriptions as presented in Tables 1a through 12b of Appendix 2, OFR 5999 (as zipped Excel 7.0 files); and 5) raw geophysical data for logs presented in Figures 4 through 15 [excluding 9 and 12] (as zipped Lotus WK1 files) of OFR 5999. $20.00

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MRD 50 – Till Compositional Database, Western Part of the Shebandowan Greenstone Belt, Northwestern Ontario

Digital data containing compositional information on c-horizon till collected from the western part of the Shebandowan greenstone belt, northwestern Ontario, is being released in conjunction with Open File Report 6012. The data set contains: 1) sample location information in UTM coordinates (NAD83 and NAD27 projections); 2) heavy mineral weight data for till; 3) gold grain summary data; 4) detailed gold grain information, including grain size and shape data; and 5) neutron activation, fire assay and ICP (aqua regia) geochemical datasets for the -63 micron fraction of till. These files are available as .wk1 files. Available on one CD-ROM. $20.00

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MRD 51 – Lake Sediment and Water Geochemical Data from the Garden Lake–Obonga Lake Area, Northwestern Ontario

Geochemical and quality control data for lake sediment, stream sediment and water collected from a survey of 2120 sites in the Garden Lake–Obonga Lake area are being released in conjunction with Open File Report 6009. Data are available as self-extracting zip files in .xls file format. Available on one CD-ROM. $20.00

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MRD 52 – Kimberlite, Base Metal, Gold and Carbonatite Exploration Targets, Derived from Overburden Heavy Mineral Data, Killala Lake Area, Northwestern Ontario

This release consists of data related to kimberlite indicator minerals, metamorphic or magmatic massive sulphide indicator minerals, gold grains and carbonatite indicator minerals from modern alluvium and till samples collected in an area between Terrace Bay and Marathon, Northwestern Ontario.This data release consists of 19 sets of data stored as both ASCII (.txt) and Microsoft^® Excel (.xls) files. Data sets are divided into overburden and bedrock related files. Similar files include: 1) definitions of abbreviations in each of the data files; 2) sample site locations; 3) sample processing data; 4) detailed gold grain summary; 5) kimberlite indicator minerals; 6) metamorphic or magmatic massive sulphide indicator minerals; 7) heavy mineral assemblage remarks; 8) kimberlite indicator mineral picking remarks; and 9) summary of microprobe data. There is one additional overburden file. Data to accompany Open File Report 6013. Available on one CD-ROM. $20.00

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MRD 53 – Till Compositional Database, River Valley Area, Northeastern Ontario

Digital data containing compositional information on C-horizon till, B-horizon soils and humus samples collected in the River Valley area, Northeastern Ontario, is being released in conjunction with Open File Report 6010. The data set contains: 1) sample location information in UTM coordinates (NAD83); 2) heavy mineral weight data for till; 3) gold grain and platinum group mineral summary data; 4) kimberlite indicator mineral data; 5) metamorphosed massive sulphide indicator mineral data; 6) pebble lithology data; 7) indicator mineral microprobe geochemical data sets; 8) neutron activation, fire assay and ICP (aqua regia) geochemical data sets for the -63 micron fraction of C-horizon till and B-horizon soils; 9) fire assay and ICP geochemical data sets for heavy mineral data; and 10) neutron activation, fire assay and ICP geochemical data sets for the -80 micron fraction of humus. These files are available as .wk1 files. Available on one CD-ROM. $20.00

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MRD 54 – Lake Sediment and Water Quality Data from the Foleyet–Missinaibi Lake Area, northeastern Ontario: Operation Treasure Hunt—Area A

Geochemical and quality control data for lake sediment and water collected from a survey of 3419 sites in the Foleyet–Missinaibi Lake area are being released in conjunction with Open File Report 6014. Data are available as self-extracting zip files in .wk1 file format. Available on one CD-ROM. $20.00

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MRD 55 – Reid-Mahaffy Airborne Geophysical Test Site Survey

This digital data release contains the results of 5 airborne geophysical surveys, including magnetic and time-domain (TDEM) or frequency-domain (FDEM) electromagnetic data, collected over the Reid–Mahaffy airborne geophysical test range, as part of the Operation Treasure Hunt program. The following systems were flown:Dighem V - helicopter FDEM (5 frequencies)

• Geotem III - fixed wing TDEM (30 Hz base frequency)
• Geotem III - fixed wing TDEM (90 Hz base frequency)
• High-Sense - helicopter FDEM (5 frequencies)
• Spectrem2000 - fixed wing TDEM (90 Hz base frequency)

The data release consists of the following: 1) 10 tiff figures describing the geophysical profile and grid data in a geological context; 2) digital profile, EM anomalies and grid archives for all 5 systems (Geosoft GDB^® and GRD^® formats, as well as ASCII formats); and 3) Geotem^® halfwave (binary format with reader) and Spectrem2000 fullwave (ASCII format) electromagnetic data. The files are available on 2 CD-ROMs. $40.00.

An Errata is available for MRD 55.

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MRD 56 – Lake Sediment and Water Quality Data from the Armstrong–Lake Nipigon Area, Northwestern Ontario: Operation Treasure Hunt—Area C

Geochemical and quality control data for lake sediment and water collected from a survey of 2176 sites in the Armstrong–Lake Nipigon area are being released in conjunction with Open File Report 6027. Data are available as self-extracting zip files in .wk1 file format. Available on one CD-ROM. $20.00

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MRD 57 – Lake Sediment Au and PGE Geochemical Data from the Garden–Obonga Lake Area, Northwestern Ontario: Operation Treasure Hunt

Geochemical and quality control data of lake sediment analyses for gold, platinum and palladium collected from a survey of 1886 sites in the Garden–Obonga Lake area are being released in conjunction with Open File Report 6028. Data are available as self-extracting zip files in .xls file format. Available on one CD-ROM. $20.00

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MRD 58 – Geological Compilation of the Kirkland Lake Area, Abitibi Greenstone Belt

This geological compilation of the Kirkland Lake area, being released in conjunction with Preliminary Map P.3425, is the third of a series of 1:100 000 scale maps and GIS data sets of the Abitibi Subprovince in Ontario being compiled over the next few years. The Kirkland Lake map covers some or all of the following fifteen NTS sheets: 31 M/5, 12, 13; 32 D/1, 8; 41 P/7, 8, 9, 10, 15, 16; 42 A/1, 2, 7, 8. Data is available in ArcView^® 3.2, which is also compatible with version 3.1. ArcExplorer^® has been provided to view and query the ArcView data. In addition, AutoCAD^® v.12, v.13 and v.14 DXF and DWG formats have been provided on the same CD-ROM. Details of the ArcView and AutoCad data sets are provided in a readme.txt file as well as a more comprehensive metadata.txt file. The data is available on CD-ROM at a price of $20.00.

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MRD 59 – Electron Microprobe Analyses and Sample Descriptions of Tantalum-Bearing Oxide Minerals from Rare-Element Granitic Pegmatites of the Separation Rapids Pegmatite Group, Northwestern Ontario

Data contained in appendixes A (Sample Descriptions) and B (Electron Microprobe Analyses) of Open File Report 6022 are also being released in digital format, and are available separately from the report. This release represents the complete database of approximately 4000 electron microprobe analyses of tantalum-bearing minerals from an area of high potential for tantalum mineral deposits. The database was generated from 1993 to 1999 and represents one of the largest of its kind in the public domain. Files for the sample descriptions are in Word (.doc) and in rich text format (.rtf). The tables of electron microprobe analyses are in Excel (.xls). Available on one CD-ROM. $20.00

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MRD 60 – Kimberlite Heavy Mineral Indicator Data, Attawapiskat Area, James Bay Lowlands, Northern Ontario

Data contained in Appendix A of Open File Report 6019 are also being released in digital format, and are available separately from the report as MRD 60. This release presents the results of microprobe analyses of samples of garnet, chromite, ilmenite, pyroxene, olivine, clinopyroxene, orthopyroxene, amphibole, magnetite, andradite garnet, almandine garnet and ulvospinel from hand samples and drill core taken from diamond-bearing kimberlite occurrences located in the Attawapiskat area of the James Bay Lowlands. These files are available as Excel 97^® (.xls) files in compressed format. Available on one CD-ROM. $20.00

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MRD 61 – Data Release, Geochemical Response of Surficial Media, North and East Ranges, Sudbury Basin

Digital data containing compositional information on humus, B- and C-horizon till collected from the north and east ranges of the Sudbury basin is being released in conjunction with Ontario Geological Survey Open File Report 6033. The data set contains: 1) sample location and site description information; 2) heavy mineral weight data for C-horizon till; 3) detailed gold grain data including grain size and shape information; 4) geochemical datasets for the –177 µm fraction of humus (aqua regia and sodium pyrophosphate digestions), the –63 µm fraction of B- and C-horizon till (aqua regia and hydroxylamine hydrochloride digestions) and the –2 mm non-magnetic HMC fraction of C-horizon till (aqua regia digestion). These files are available as Excel 97^® (.xls) files. Available on one CD-ROM. $20.00

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MRD 62 – Preliminary Release of Geoscience Data, Red Lake Greenstone Belt, Northwestern Ontario

This digital compilation of data contains a wide range of geoscience information collected over the Red Lake greenstone belt using geographic information system (GIS) technology. The compilation was jointly produced by the Geological Survey of Canada and the Ontario Geological Survey. The Red Lake compilation covers all or parts of the following nine NTS sheets: 52 K/13, 14; 52 L/16; 52 M/7, 8; 52 N/3, 4, 5, 6. Data in this compilation includes bedrock geology, Quaternary geology, mineral occurrences, drill hole information, assessment file information, lithogeochemistry, geophysics, satellite imagery and digital topography. The data is available in a variety of formats including ArcInfo^®, ArcView^®, ArcExplorer^® and MapInfo^®. Details of the data sets, including marginal notes, data structure and legends, is provided in ASCII, Microsoft^® Word^® and HTML file formats. For PC users, a free data viewer, ArcExplore 2.0^®, is included on the CD-ROM. The data is available on one CD-ROM at a cost of $20.00. This data is also being released as Geological Survey of Canada, Open File D3751.

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MRD 63 – Au and PGE Data, Atikokan Area Lake Sediment Survey - Operation Treasure Hunt

Geochemical and quality control data for lake sediment collected from a survey of 2153 sites in the Atikokan area are being released in conjunction with Open File Report 6034. Data are available as self-extracting zip files in .xls file format on one CD-ROM. $20.00.

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MRD 64 – Lake Sediment and Water Quality Data from the Nakina–Longlac Area, Northwestern Ontario: Operation Treasure Hunt—Area B

Geochemical and quality control data for lake sediment and water collected from a survey of 2494 sites in the Nakina–Longlac area are being released in conjunction with Open File Report 6035. Data are available as self-extracting zip files in .wk1 file format. Available on one CD-ROM. $20.00

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MRD 65 – Gold and PGE Lake Sediment Data for the Schreiber–Hemlo Area - Operation Treasure Hunt

Geochemical and quality control data for lake sediment collected from a survey of 1433 sites in the Schreiber–Hemlo area are being released in conjunction with Open File Report 6036. Data are available as self-extracting zip files in .wk1 and tab-delimited ASCII text (.txt) file format on one CD-ROM. $20.00.

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MRD 66 – Lake Sediment and Water Geochemical Data from the Mishibishu Lake Area High Density Lake Sediment and Water Geochemical Survey, Northern Ontario

This release consists of lake sediment and lake water geochemical data for samples collected from 1384 sites in the Mishibishu Lake area of northern Ontario. The files are in Microsoft^® Excel^® format; version 2.1. Available on one CD-ROM. $20.00

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MRD 67 – Kimberlite Indicator Minerals from Till Samples in the River Valley–Verner Area, Northeastern Ontario

This release consists of data related to kimberlite indicator minerals recovered from till samples collected in the River Valley–Verner area, northeastern Ontario. This data release consists of 9 sets of data stored as both ASCII (.txt) and Microsoft^® Excel^® (.xls) files. Data sets consist of 1) definitions of abbreviations used in each of the data files (Intro); 2) sample site locations (NAD 83) (Appendix I); 3) summary of kimberlite indicator mineral counts (Appendix II); and 4) summary of microprobe data (wt% geochemistry) for kimberlite indicator minerals: garnets, chromites, Mg-ilmenites, olivines, pyroxenes and others (Appendix III). Available on one CD-ROM. $20.00

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MRD 68 – Results of Modern Alluvium Sampling, Kapuskasing–Fraserdale Area, Northeastern Ontario: Operation Treasure Hunt—Kapuskasing Structural Zone

This release consists of data related to kimberlite indicator minerals (KIMs), metamorphic/magmatic massive sulphide indicator minerals (MMSIMs^®), carbonatite indicator minerals and gold grains recovered from modern alluvium samples collected in the Kapuskasing–Fraserdale area, northeastern Ontario. The data are being released in conjunction with Open File Report 6044. Files on this release contain information on abbreviations used; sample site locations; KIM counts; microprobe data (wt% geochemistry) for KIMs (e.g., garnets, chromites, Mg-ilmenites, olivines, and pyroxenes); MMSIMs^®; microprobe data (wt% geochemistry) for MMSIMs^®, gahnite; carbonatite indicator minerals; and gold grains. The data are available as compressed files in ASCII (.txt) and Microsoft^® Excel^® (.xls) file format on one CD-ROM. $20.00.

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MRD 69 – Till Compositional Database, Kimberlite and Base Metal Indicator Minerals, Shebandowan Greenstone Belt, Northwestern Ontario

Digital data containing compositional information on indicator minerals isolated from C-horizon till collected over the Shebandowan greenstone belt in northwestern Ontario are being released in conjunction with Ontario Geological Survey Open File Report 6046. The data set contains: 1) sample location and site description information; 2) heavy mineral assemblage information; 3) metamorphic/magmatic massive sulphide indicator minerals (MMSIMs^®) grain count information; and 4) major oxide microprobe information of selected picked grains. These files are available as .xls and tab-delimited (.txt) files. Available on one CD-ROM. $20.00

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MRD 70 – Gold and PGE Lake Sediment Data for the Peterlong Lake–Radisson Lake Area—Operation Treasure Hunt

Geochemical and quality control data for the lake sediment samples collected from a survey of 911 sites in the Peterlong Lake–Radisson Lake area are being released in conjunction with Open File Report 6053. Data are available as compressed files in .wk1 and tab-delimited ASCII text (.txt) file format on one CD-ROM. $20.00.

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MRD 71 – Miscellaneous Database Related to the Drift Exploration for Platinum Group Elements, Northwestern Ontario

Geochemical, heavy mineral and quality control data collected from a survey of 242 sites in northwestern Ontario are being released in conjunction with Open File Report 6054. Data are available as compressed files in .wk1 file format on one CD-ROM. $20.00.

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MRD 72 – Regional Modern Alluvium Sampling Survey of the Temagami–Marten River Area, Northeastern Ontario

This release contains data resulting from heavy mineral processing of 256 modern alluvium samples from an area of approximately 3619 km2 in the region of Temagami to Marten River, northeastern Ontario. It is being released in conjunction with Open File Report 6043. Kimberlite indicator minerals (KIMs); metamorphic/magmatic massive sulphide indicator minerals (MMSIMs^®); gold grains and any other interesting indicator minerals were isolated to determine anomalies. Files on this release contain information on sample site locations and sample processing data; KIMs picked and picking remarks; geochemical analyses; gold grain data; MMSIMs^® picked, picking remarks, and assemblages present; pebble lithology data; and normalized KIM results. Data are available as compressed files in ASCII (.txt) and Microsoft^® Excel^® (.xls) file format on one CD-ROM. $20.00.

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MRD 73 – Miscellaneous Data Related to the Wawa Quaternary Geology Mapping Project, Northeastern Ontario

This release consists of overburden data sampled to characterize Quaternary deposits in the Wawa area of northeastern Ontario. In addition, data for glacial striae, till fabric analysis, glaciofluvial paleocurrent analysis and altimeter recordings are included. Files include information on list of abbreviations used; sample site locations; material geochemistry; material carbonate analysis; material textural data; pebble data; striae orientation; till geochemistry by bedrock terrane; till fabric analysis and glaciofluvial paleocurrent data; and altimeter data. Data are available as compressed files in ASCII (.txt) and Microsoft^® Excel^® (.xls) file format. Data to accompany Open File Report 6055. Available on one CD-ROM. $20.00

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MRD 74 – Geochemical and Till Pebble Lithology Data Related to the Schreiber–Killala Lake Overburden Mapping and Sampling Program, Northwestern Ontario

This release consists of sample site locations, geochemical and pebble lithology data for humus and till "B" and "C" material collected in the Schreiber–Killala Lake area of northwestern Ontario. This data is being released in conjunction with Open File Report 6056. Files include information on abbreviations used; sample site locations; analytical methods and detection limits; humus and till standard and duplicate analyses; orientation survey geochemistry; regional humus geochemistry; regional till "B" geochemistry; regional till "C" geochemistry; and till pebble data. Data are available as compressed files in ASCII (.txt) and Microsoft^® Excel^® (.xls) file format on one CD-ROM. $20.00.

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MRD 75 – Geochronology Data for Ontario

This release consists of absolute age determinations, using U/Pb, Nd/Sm, Rb/Sr, K/Ar, Ar/Ar and other dating methods, for all rocks older than 1 million years within the province of Ontario. All information is presented using the same, current, international decay constants. Relevant age data from jurisdictions immediately bordering Ontario are also included. The data set consists of information collected from the published literature, and is current to January 31, 2001. The data set supercedes a previous, hard copy release in 1986 of geochronology data for Ontario contained in Open File Report 5592. Explanatory information on compilation procedures, data presentation, and an annotated citation list are presented as Microsoft^®Word 97^® (.doc) files. The geochronology data are presented as Microsoft^®Excel 97^® (.xls) files. Available on one CD-ROM. $20.00

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MRD 76 – Lake Sediment and Water Geochemical Data from the Shebandowan Lake Area, Northwestern Ontario

Geochemical and quality control data for lake sediment and water collected from a survey of 1489 sites in the Shebandowan Lake area are being released in conjunction with Open File Report 6057. Data are available as compressed files in .xls file format. Available on one CD-ROM. $20.00

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MRD 77 – Geochemistry of Queenston Formation Samples from Outcrops, Quarries and Drill Cores, Southern Ontario

This release consists of geochemical data for samples of the Upper Ordovician Queenston Formation obtained from outcrops, quarries and drill cores located in the Niagara Falls to Wiarton area of southern Ontario. Files in this release contain information on sample locations and sample descriptions; major and minor element geochemistry data for individual bed and composite samples from quarries, outcrops and drill holes; and trace element data for samples from one drill hole. These data are to be used in conjunction with Open File Report 6058. Data are available as self-extracting zip files in ASCII (.txt) and Microsoft^® Excel^® 7.0 (.xls) file format. Available on one CD-ROM. $20.00

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MRD 78 – Till Compositional Database, Kimberlite and Base Metal Indicator Minerals, Peterlong Lake–Radisson Lake Area, Northeastern Ontario

Digital data containing compositional information on indicator minerals isolated from C-horizon till collected over the Peterlong Lake–Radisson Lake area, northeastern Ontario is being released in conjunction with Ontario Geological Survey Open File Report 6060. The data sets contain: 1) sample location information; 2) heavy mineral assemblage information; 3) MMSIM^® grain count information; 4) KIM grain count information; and 5) major oxide microprobe information of selected picked grains. These datasets are available as .xls files in compressed file format on one CD-ROM. $20.00.

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MRD 79 – Regional Ground Gravity Survey from the Timmins Collaborative Gravity Survey Project

This data release is the result of a collaborative project comprising Placer Dome (CLA) Limited, Ontario Geological Survey, Explorers Alliance Corporation, NRCAN-Geomatics Canada, and NRCAN-Geological Survey of Canada. The release consists of gravity measurements with a nominal station spacing of 1 km covering about 2800 km2. Hardcopy maps showing Bouguer gravity and vertical gravity gradient are available as Maps 81 670 and 81 671, respectively. Data on this release are available as compressed files in ASCII and Geosoft^® (.gdb) file format on one CD-ROM. $20.00.

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MRD 80 – Gold and PGE Geochemical Data from the Montreal River Headwaters Area Lake Sediment Survey, Northern Ontario: Operation Treasure Hunt

Geochemical and quality control data for lake sediment samples collected from a survey of 790 sites in the Gowganda area are being released in conjunction with Open File Report 6061. Data are available in Microsoft^® Excel^® (.xls) file format on one CD-ROM. $20.00.

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MRD 81 – Lake Sediment and Water Data for the Shining Tree Area

Geochemical and quality control data for lake sediment and water collected from a survey of 1813 sites in the Shining Tree area are being released in conjunction with Open File Report 6062. Data are available as self-extracting zip files in tab-delimited ASCII text (.txt) file format on one CD-ROM. $20.00.

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MRD 82 – Results of Modern Alluvium Sampling, Chapleau Area, Northeastern Ontario: Operation Treasure Hunt—Kapuskasing Structural Zone

This release consists of data related to kimberlite indicator minerals (KIMs), metamorphosed magmatic/massive sulphide indicator minerals (MMSIMs^®), carbonatite indicator minerals and gold grains recovered from modern alluvium samples collected in the Chapleau area, northeastern Ontario. The data are being released in conjunction with Open File Report 6063. Files on this release contain information on abbreviations used; sample site locations; KIM counts; microprobe for KIMs (e.g., garnets, chromites, Mg-ilmenites, olivines, and pyroxenes); MMSIMs^®; microprobe data for MMSIMs^®, gahnite; carbonatite indicator minerals; and gold grains. Data is available as self-extracting zip files in ASCII (.txt) and Microsoft^® Excel^® (.xls) file format on one CD-ROM. $20.00.

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MRD 83 – Modern Alluvium Data Release, Foleyet Area, Northeastern Ontario: Operation Treasure Hunt

This release consists of data related to kimberlite indicator minerals (KIMs), metamorphic/magmatic massive sulphide indicator minerals (MMSIMs^®), carbonatite indicator minerals and gold grains recovered from modern alluvium samples collected in the Foleyet area, northeastern Ontario. The data are being released in conjunction with Open File Report 6065. Files on this release contain information on abbreviations used; sample site locations; KIM counts; microprobe data for KIMs (e.g., garnets, chromites, Mg-ilmenites, olivines, and pyroxenes); MMSIMs^®; microprobe data for MMSIMs^®, gahnite; carbonatite indicator minerals; and gold grains. Data is available as self-extracting zip files in ASCII (.txt) and Microsoft^® Excel^® (.xls) file format on one CD-ROM. $20.00.

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MRD 84 – Indicator Minerals for Kimberlite, Base Metals and Gold: Northern Superior Province, Ontario

This release consists of data related to kimberlite indicator minerals (KIMs), metamorphic/magmatic massive sulphide indicator minerals (MMSIMs^®) and gold grains recovered from samples of surficial materials in the northern Superior area, 350 km north of Red Lake, Ontario. The data is being released in conjunction with Open File Report 6066. The release comprises 12 tables of data on sample locations and descriptions; sample processing; gold grain shape, gold grain size and shape data; MMSIMs^®; kimberlite indicator counts; heavy mineral picking remarks; mineral chemistry; suites of minerals associated with base metals and other sources; shape, roundness and surface textures of KIM grains; chromite grain descriptions and a list of possibly kimberlitic chromite samples. The data is available as Microsoft^® Excel^® (.xls) and ASCII (.txt) tab-delimited files. Available on one CD-ROM. $20.00

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MRD 85 – Whole Rock Lithogeochemical Data of Prospective versus Barren Volcanic Belts for Volcanogenic Massive Sulphide (VMS) Deposits, Superior Province, Ontario: Operation Treasure Hunt

Lithogeochemical digital data consisting of whole rock chemical analyses of predominately mafic metavolcanic rocks of areas that are prospective and non-prospective for volcanogenic massive sulphide (VMS) deposits in the Superior Province, Ontario. There are 1260 samples from the Abitibi, Wawa, Wabigoon, Uchi and Sachigo subprovinces including detailed sampling in the areas of the Kidd Creek, Manitouwadge, Winston Lake, Sturgeon Lake, South Bay, and Musselwhite Mines. The samples were collected as the Ontario portion of the CAMIRO project 93E06 examining the possibility of identifying a distinctive lithogeochemical signature for the mafic metavolcanic rcks associated with Cu-Zn-Pb VMS deposits. The data is available as Microsoft^® Excel 97 (.xls) files, tab-delimited ASCII (.txt) files and ArcView^® 3.2 shape (.shp) and database (.dbf) files on a single CD-ROM. $20.00.

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MRD 86 – A Compilation of References for Kimberlite, Diamond and Related Topics

This release is a complete bibliographic listing of reference literature assembled by R.P. Sage during province-wide kimberlite project initiated in May 1993. The bibliographic references include journal papers, reference books, newspaper articles and industry reports on kimberlite and diamonds and related topics that include origin and genesis of kimberlite; geochemistry of kimberlite mineral phases; xenolith composition; etc. This database is being released in conjunction with Open File Report 6067. The references have been subdivided into topics and listed alphabetically by author. This database is available in ASCII (.txt); Microsoft^® Access (.mdb); Microsoft^® Word (.doc); and Adobe Acrobat^® PDF formats. Available on one CD-ROM. $20.00

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MRD 87 – Modern Alluvium Data Release, Coral Rapids Area, Northeastern Ontario: Operation Treasure Hunt

This release consists of data related to kimberlite indicator minerals (KIMs), metamorphic/magmatic massive sulphide indicator minerals (MMSIM^®), carbonatite indicator minerals and gold grains recovered from modern alluvium samples colected in the Coral Rapids area, northeastern Ontario. The data being released in conjunction with Open File Report 6068. Files on this release contain information on abbreviations used; sample site locations; KIM counts; microprobe data for KIMs (e.g., garnets, chromites, Mg-ilmenites, olivines, and pyroxenes); MMSIMs; microprobe data for MMSIMs, gahnite; carbonatite indicator minerals; and gold grains. Data is available in ASCII (.txt) and Microsoft^® Excel (.xls) file format. Available on one CD-ROM. $20.00

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MRD 88 – Lake Sediment Analytical Data for the Sioux Lookout-Bamaji Lake Area: Operation Treasure Hunt

Geochemical and quality control data for lake sediment collected from a survey in the Sioux Lookout-Bamaji Lake area are being released in conjunction with Open File Report 6069. Data are available in tab-delimited ASCII (.txt) and Microsoft^® Excel (.xls) file format. Available on one CD-ROM. $20.00

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MRD 89 – Lake Sediment Geochemical Data (including Au, Pt and Pd) form the Fort Hope Area, Northwestern Ontario

Geochemical and quality control data for lake sediment samples collected from a survey of 3694 sites in the Fort Hope area are being released in conjunction with Open File Reports 6071. Data are available in comma-delimited ASCII (.csv) and Microsoft^® Excel (.xls) file format on one CD-ROM. $20.00.

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MRD 90 – Electron Microprobe Compositions of Tantalum-Bearing Oxides and Potassium Feldspar from Rare-Element Granitic Pegmatites, Superior Province, Northwestern Ontario

The tables on this CD contain the representative compositions of tantalum-bearing oxides and potassium feldspar from rare-element pegmatites and fertile granites located in northwestern Ontario and described in OFR 6070 (article 39). The tantalum-oxide minerals are members of the columbite-tantalite series (91 compositions) and microlite (15 compositions), and the potassium feldspar is most likely microline (48 compositions). The tables present the compositions for tantalum-oxides and potassium feldspar in wt. % oxide and recalculated structural formulae (apfu). UTM co-ordinates and zone for each locality are also provided. The analytical work performed in 2000-2001 by A.G. Tindle at Open University, UK. Tables of electron microprobe compositions are in Microsoft^® Excel (.xls) and comma-delimited ASCII (.csv) file formats. Available on one CD-ROM. $20.00

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MRD 91 – Physical Rock Property Data from the Matheson and Kirkland Lake areas

Physical rock property determinations are provided for over three hundred samples collected from the Matheson and Kirkland Lake areas. Available as Microsoft^® Excel (.xls) and tad-delimited ASCII (.txt) file formats.Available on one CD-ROM. $20.00

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MRD 92 – Results of Firing and Properties Testing, Queenston Formation Formation Shale, southern Ontario

This release consists of firing and properties testing data for drill core samples of the Upper Ordovician Queenston Formation. Samples are obtained from a 2000 drilling program conducted as part of an OGS study into the shale resources of the Queenston Formation (geochemical data for these samples was published in Open File Report 6058 and Miscellaneous Release -- Data 77). Testing was done by the National Brick Research Center (NBRC), at Clemson University, Anderson, South Carolina, U.S.A. Tests include: gradient fired bar, differential thermal analysis (DTA), thermal gravimetric analysis (TGA), thermal dilatometric analysis (TDA), loss on ignition, efflorescence, dry and fired shrinkage, absorption, compressive strength (modulus of rupture), density, specific gravity, and porosity. These data are t be used in conjunction with forthcoming Open File Report. Some data (e.g., themal expansion curves) are graphical and are available in raster (.gif) file format. The remaining data are available in ASCII (.txt) and Microsoft^® Excel (.xls) file format. Available on one CD-ROM. $20.00

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MRD 93 – Geological Compilation of the Swayze Area, Abitibi Greenstone Belt

This geological compilation of the Swayze area, being released in conjunction with Preliminary Map P.3511, is the fourth of a series of 1:100 000 scale GIS data sets and maps of the Abitibi Subprovince in Ontario, being compiled over the next few years. The Swayze map covers some or all of the following nineteen NTS sheets: 41 O/7,8,9,10,11,14,15,16; 41 P/5,12,13; 42 A/4,5; and 42 B/1,2,3,6,7,8. Data are available in ArcView^® 3.2 format, which is also compatible with version 3.1. ArcExplorer^® version 2.0 has been provided to view and query the ArcView^® data. In addition, AutoCAD^® v.12, v.13 and v.14 .dxf and .dwg formats have been provided on the same CD-ROM. Details of the ArcView^® and AutoCAD^® data sets are provided in an HTML file which includes comprehensive metadata information. The data are available on CD-ROM at a price of $20.00.

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MRD 94 – Geological Compilation of the Matachewan Area, Abitibi Greenstone Belt

This geological compilation of the Matachewan area, has been released in association with Preliminary Map P.3527 (released April 16, 2003), is the fifth of a series of 1:100 000 scale maps and GIS data sets of the Abitibi Subprovince in Ontario. The Matachewan map covers some or all of the following ten NTS sheets: 41 P/6, 7, 10, 11, 14, 15; 42 A/2, 3, 6, 7. Data are available in ArcView^® 3.2, which is compatible with version 3.1, and ArcMap^® 8.1. ArcExplorer^® has been provided to view and query the ArcView^® data. In addition, AutoCAD^® v.12, v.13 and v.14 .dxf and .dwg formats have been provided. Details of the ArcView^® and AutoCAD^® data sets are provided in a readme.txt file as well as a more comprehensive metadata.txt file. The data are available on one CD-ROM. $20.00.

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MRD 95 – Whole-Rock and Mineral Chemistry, Assay, and Petrographic Data for the River Valley Intrusion, Crerar and Dana Townships, Grenville Province, Ontario

This release contains whole-rock chemistry, mineral chemistry, assay, and petrographic data, focussing mainly on the River Valley intrusion, that were collected from Dana and Crerar townships in 1999 and 2000. These data were acquired as part of two separate Ontario Geological Survey projects: PU99-007—Geology of Crerar and Dana Townships, and PU99-019—Geology, Chemostratigraphy, and Ore Mineralogy of the River Valley Intrusion. This release consists of 8 tables in each of Microsoft^® Excel 97 (.xls) and comma-delimited (.csv) format. The files are on one CD-ROM. $20.00.

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MRD 96 – Data Release of Kimberlite and Base Metal Exploration Targets, Derived from Overburden Heavy Mineral Data, Schreiber Area, Northwestern Ontario

This release consists of data related to kimberlite indicator minerals (KIMs), metamorphic/magmatic massive sulphide indicator minerals (MMSIMs^®), gold grains and carbonatite indicator minerals from modern alluvium and till samples collected in an area between Schreiber and Terrace Bay, northwestern Ontario. The data are being released in conjunction with Open File Report 6074. Files consist of an introduction explaining acronyms and abbreviations; comments from Overburden Drilling Management Limited regarding specific samples; sample site locations; sample processing data; gold grain summary; KIMs picked and KIM picking comments; MMSIMs^®; heavy mineral assemblage remarks and summary of picked grains; and summary of microprobe data. Files for the introduction and comments are in Microsoft^® Word (.doc) and Rich Text Format (.rtf); data files are in ASCII (.txt), Microsoft^® Excel (.xls) and comma delimited (.csv) formats. Available on one CD-ROM. $20.00

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MRD 97 – Data Release of Kimberlite and Base Metal Exploration Targets, Derived from Overburden Heavy Mineral Data, Longlac Area, Northwestern Ontario

This release consists of data related to kimberlite indicator minerals (KIMs), metamorphic/magmatic massive sulphide indicator minerals (MMSIMs^®), gold grains and carbonatite indicator minerals from modern alluvium and till samples collected in an area north, east and southeast of Longlac, northwestern Ontario. The data are being released in conjunction with Open File Report 6075. Files on this release consist of definitions of abbreviations; Overburden Drilling Management Limited cover letters; sample site locations; sample processing data; gold grain summary; KIMs picked and KIM picking comments; MMSIMs^®; heavy mineral assemblage remarks and summary of picked grains; summary of microprobe data; and pebble lithology data and Cr-pyrope garnet grain shapes. Files for the abbreviations and cover letters are in Microsoft^® Word (.doc) and Rich Text Format (.rtf); the numerical data, in ASCII (.txt), Microsoft^® Excel (.xls) and comma delimited (.csv) formats; and the image data, in Microsoft^® PowerPoint^® (.ppt). The data are available on one CD-ROM at a price of $20.00.

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MRD 98 – Lake Sediment Geochemical Data from the Wawang Lake–English River Area, Northwestern Ontario

Geochemical and quality control data for lake sediments collected from a survey of 470 sites in the Wawang Lake–English River area are being released in conjunction with Open File Report 6076. Data are available as self-extracting zip files in .wk1 file format. Available on one CD-ROM. $20.00

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MRD 99 – Regional GIS Database for the Abitibi Greenstone Belt, Ontario

This digital compilation of data contains a wide range of geoscience information collected over the Abitibi greenstone belt in northeastern Ontario using geographic information system (GIS) technology. The compilation was jointly produced by the Geological Survey of Canada and the Ontario Geological Survey. The Abitibi compilation covers the following 35 NTS sheets: 31 M/12, 13; 32 D/4, 5, 12, 13; 32 E/4; 41P/9, 10, 11, 12, 13, 14, 15, 16; 42 A (all); 42 H/1, 2, 3, 4. Data in this compilation includes bedrock geology, Quaternary geology, mineral occurrences, drill hole information, assessment file information, lithogeochemistry, geophysics, satellite imagery and scanned geology maps. The data are available in a variety of formats including ArcView^®, ArcExplorer^® and MapInfo^®. Details of the data sets, including source information, data structure and legends, are provided in ASCII, Microsoft^® Word and HTML file formats. For PC users, a free data viewer, ArcExplorer^® 2.0, is included on the CD. The data are available on 2 CD-ROMs at a cost of $40.00.

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MRD 100 – Magmatic Ni-Cu ± PGE Occurrences and Mafic-Ultramafic Bodies in Ontario

This digital map and database release of magmatic Ni-Cu ± PGE occurrences and mafic–ultramafic intrusions in Ontario was jointly produced by the Geological Survey of Canada, the Mineral Exploration Research Centre of Laurentian University and the Ontario Geological Survey, and consists of three separate products: 1) a vector-based digital map of the geology of Ontario with all known magmatic nickel-copper ± PGE occurrences and mafic–ultramafic bodies in Ontario, available in MapInfo^® file format. Raster images of the magnetic fabric, the Bouguer gravity field and lake sediment geochemistry for Ni, Cu, Co, and Cr are also included. To allow users who do not have MapInfo^® software to utilize this GIS product, MapInfo^® ProViewer™ software is provided on the CD–ROM; 2) two separate databases, in Microsoft^® Access file format, for magmatic Ni-Cu ± PGE occurrences and mafic–ultramafic bodies. The latter includes the new geological and geochemical data collected in the summer of 2001; and 3) a folder with Hewlett^®–Packard plot file (.rtl) and image files (.jpeg) of the main maps. The data are available on 1 CD–ROM. $20.00.

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MRD 101 – Summary of Clinopyroxene Data

This release consists of data related to clinopyroxenes derived from a number of sources.It represents a depository of data associated with a paper by the same authors titled “A study in clinopyroxene composition: implications for kimberlite exploration”, published in 2002 in Geochemistry: Exploration, Environment, Analysis (v.2, p.321-332). The clinopyroxene data comprising this release are contained in 127 files subdivided on the basis of a) clinopyroxene equilibrated under mantle conditions; b) mantle-equilibrated clinopyroxene derived from non-kimberlite sources; c) mantle-equilibrated clinopyroxene derived from kimberlite; and d) clinopyroxene recovered from overburden. A reference for each data file is provided within the file, and these are cross-referenced to a reference list that includes the file name. The data files are available in Microsoft^® Excel (.xls) format, and the reference list is available in Microsoft^® Word (.doc) format.Available on one CD-ROM. $20.00

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MRD 102 – Modern Alluvium Data Release, Mattawa–Cobalt Corridor, Northeastern Ontario

This release consists of data resulting from heavy mineral processing of 277 samples collected over an area of approximately 3825 km2 in the Mattawa–Cobalt area, northeastern Ontario. The data consist of kimberlite indicator minerals (KIMs), metamorphic/magmatic massive sulphide indicator minerals (MMSIM®) and gold grains recovered from modern alluvium and till samples. The data were released in conjunction with Open File Report 6088. Files on this release contain information on sample site locations; abbreviations used; sample processing data; KIMs picked and picking remarks; microprobe analyses of KIMs; gold grain data; MMSIMs® picked, picking remarks and assemblages present; pebble lithology data; and normalized KIM results. Data are available as compressed files in ASCII (.txt) and Microsoft® Excel (.xls) file format on one CD-ROM. $20.00.

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MRD 103 – A Study of Indicator Minerals for Kimberlite, Base Metals and Gold: Kasabonika, Ontario

This release consists of data related to indicator minerals of kimberlite, metamorphic/magmatic massive sulphide indicator minerals (MMSIMs^®) and gold grains recovered from samples of surficial materials in the area of Kasabonika, Ontario. Also included are results of one whole rock chemical analysis and two assays of rock samples. The data are being released in association with Open File Report 6089 (to be released August 2002). The release is composed of 9 tables of data: sample locations and descriptions, analyses of rock samples, distribution of pebble lithologies, sample processing, gold grain size and shape data, metamorphosed or magmatic sulphide indicator minerals, kimberlite indicator counts, heavy mineral picking remarks and mineral chemistry. The data are available as Microsoft^® Excel (.xls) and corresponding tab-delimited text files and Microsoft^® Word (.doc) files with corresponding text-only files. Available on one CD-ROM. $20.00

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MRD 104 – Lake Sediment Analytical Data for the Sturgeon Lake–Lake St. Joseph Area

Geochemical and quality control data for lake sediment collected from a survey in the Sturgeon Lake–Lake St. Joseph area are being released in conjunction with Open File Report 6087. Data are available as zip files in tab-delimited ASCII text (.txt) file format. Available on one CD-ROM. $20.00

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MRD 105 – Phoenix Bedrock Mapping Project: Whole Rock Lithogeochemical and Assay Data, Mineral Deposit Information, and Diamond Drill Hole Compilation of the Kitto, Eva, Summers, Dorothea and Sandra Townships, Beardmore Area, Northwestern Ontario

This digital data release consists of chemical analyses and compiled geological and geophysical information utilized in the geological interpretation presented on Preliminary Maps P.3512, P.3513, and P.3514 (this release) resulting from the Phoenix Bedrock Mapping Project. Whole rock chemical data for representative samples of the geologic units consist of X-ray fluorescence (XRF), fused and pressed powder (major and trace elements), inductively coupled plasma–mass spectrometer (ICP–MS) (trace and rare earth elements and precious metals), and inductively coupled plasma–atomic emission spectroscopy (ICP–AES) (metals and trace elements). Select samples of Proterozoic mafic to ultramafic intrusions were also analyzed for platinum group elements (PGE) by nickel fire assay with an ICP–MS finish. Assay data for mineralized samples consist of ICP–AES (metals and trace elements), with fire assay analyses for gold-related samples, and ICP–MS (precious metals) for PGE-related samples. Both lithogeochemical and assay samples have associated rock descriptions and positional data in UTM coordinates. Also included is a compilation of modified data from the Ontario Drill Hole Database, Assessment File Resource Inventory, and Mineral Deposit Inventory (MDI2) databases. A reference base of the geology from Preliminary Maps P.3512, P.3513 and P.3514 is provided as ArcView^® polygons. The data are available as Microsoft^® Excel (.xls), tab-delimited ASCII text (.txt), and ArcView^® 3.2 format shape and database files in UTM coordinates, NAD83. Available on one CD-ROM. $20.00

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MRD 106 – Lake Sediment Geochemical Data from the Perrault Falls Survey Area, Northwestern Ontario

Lake Sediment Geochemical Data from the Perrault Falls Survey Area, Northwestern Ontario: Operation Treasure Hunt; by Ontario Geological Survey. Geochemical and quality control data for lake sediment samples collected from a survey of 1124 sites in the Perrault Falls area of northwestern Ontario was released in conjunction with Open File Report 6092. Data are available as Microsoft^® Excel (.xls) compressed files on one CD-ROM. $20.00.

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MRD 107 – Geochemistry of Selected Ordovician and Silurian Shale Samples from Outcrops, Quarries and Drill Cores, Southern Ontario

This release consists of geochemical data for samples of the Upper Ordovician Queenston, Georgian Bay and Blue Mountain formations and the Lower Silurian Cabot Head and Wingfield formations. Samples were obtained from outcrops, quarries and drill cores located in the Niagara Falls to Lions Head area of southern Ontario and the Russell area of eastern Ontario. Files in this release contain information on sample locations and sample descriptions; major and minor element geochemistry data for individual bed and composite samples; and trace element data for samples from one drill hole. These data are to be used in conjunction with the forthcoming Open File Report 6094. Data are available as self-extracting zip files in ASCII (.txt) and Microsoft^® Excel 7.0 (.xls) file formats. Available on one CD-ROM. $20.00

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MRD 108 – Lake Sediment and Water Quality Data from the Lac des Iles–Black Sturgeon River Area, Northwestern Ontario: Operation Treasure Hunt

Geochemical and quality control data for lake sediment and water collected from a survey of 2455 sites in the Lac des Iles–Black Sturgeon River area are being released in conjunction with Open File Report 6096. Data are available as self-extracting zip files in .xls file format. Available on one CD-ROM. $20.00

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MRD 109 – Indicator Mineral and Geochemistry Data Release, "Spider 3" Regional Survey, Upper Attawapiskat and Ekwan Rivers, Northern Ontario

This release consists of data related to kimberlite indicator mineral (KIM) and geochemistry results for 626 samples of alluvium, till and glaciofluvial material collected during the "Spider 3" regional survey carried out in the vicinity of the upper Attawapiskat and Ekwan rivers, northern Ontario. These data are being released in conjunction with Open File Report 6097. Files on this release contain information on sample site locations; results for gravity table and heavy liquid concentration; mineral processing results and KIM counts; microprobe data for KIMs (e.g., Cr-pyrope garnets, Mg-ilmenites, clinopyroxenes and chromites); and geochemistry results. The data are available as self-extracting zip files in ASCII (.txt) and Microsoft^® Excel (.xls) file format on one CD-ROM. $20.00.

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MRD 110 – Lake Sediment and Water Geochemical Data from the Kabinakagami Lake Area, Northern Ontario

Geochemical and quality control data for lake sediment and water samples collected from a survey of 1035 sites in the Kabinakagami Lake area of northern Ontario are being released in conjunction with Open File Report 6098. Data are available as Microsoft^® Excel (.xls) files. Available on one CD-ROM. $20.00

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MRD 111 – Electron Microprobe and Bulk Analyses of Fertile Peraluminous Granites and Related Rare-element Pegmatites, Superior Province, Northwest and Northeast Ontario: Operation Treasure Hunt

This release contains analytical chemical data for sample localities described in a forthcoming Open File Report (OFR 6099). All of the UTM coordinates and zones for sample localities are provided in one table. The database consists of 8004 mineral compositions (from pegmatites and fertile granites) analyzed on an electron microprobe. The average weight % Ta₂O₅ for columbite-tantalite grains and average weight % Rb₂O and Cs₂O for potassium feldspar and mica for selected localities are provided in tables and diagrams, allowing the user to compare mineral compositions for localities across Ontario. This release also contains a table consisting of an overall summary of minerals that were analyzed by an electron microprobe for each sample and for each locality. Major oxide and trace element bulk compositions for fertile granites, aplites, metasomatized mafic metavolcanic rocks (183 whole rock compositions), potassium feldspar (98 compositions) and muscovite (22 compositions) are also included in this release. The bulk compositions are plotted in numerous graphs to illustrate chemical trends and degrees of fractionation. The data are available as Microsoft^® Excel (.xls) and comma delimited ASCII (.csv) file formats on one CD-ROM diskette. $20.00.

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MRD 112 – Results of 2001-2002 Shale Drilling Program: Lithologic Core Logs, Major, Minor and Trace Element Analyses

This release consists of location information and lithologic logs for 6 cores drilled in 2001 and 2002, as part of a project to evaluate the shale resource potential of the Upper Ordovician Queenston, Georgian Bay and Blue Mountain formations in southern Ontario and their equivalents in eastern Ontario. This release also includes major and minor element geochemical data for samples from these 6 cores and trace element data for samples from one of the holes. These data are to be used in conjunction with the forthcoming Open File Report 6094. Data are available as self-extracting zip files in ASCII (.txt) and Microsoft^® Excel 7.0 (.xls) file format. Available on one CD-ROM. $20.00

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MRD 113 – Lithogeochemical Data from the Red Lake Greenstone Belt, Northwestern Ontario

Lithogeochemical data are being released for approximately 640 samples collected from a variety of altered and unaltered rock types in the Red Lake greenstone belt, during a 3-year metallogenic and alteration study as part of the Western Superior NATMAP initiative. Data are available as Microsoft^® Excel (.xls) files on one CD-ROM. $20.00.

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MRD 114 – Proterozoic Volcanic and Intrusive Whole Rock Geochemical Data Associated with the Keweenawan Midcontinent Rift, Lake Superior Area, Ontario

This data release contains both new geochemical data, and data contained in the ERLIS geochemical database and open file reports, for the Proterozoic volcanic and intrusive rocks of the Keweenawan Midcontinent Rift. The new analytical data are for samples concentrated in the Osler Group volcanic rocks on Simpson and St. Ignace islands and the Black Bay Peninsula, with a smaller subset from the islands in the area of Crooks Township, south of Thunder Bay. Compiled data include volcanic and intrusive rocks from the same area, plus the intrusive rocks of the Lake Nipigon area and the volcanic rocks of the Mamainse Point area. Whole rock chemical data for all samples consist of X-ray fluorescence (XRF), fused and pressed powder, for major and trace elements. The new geochemical data, and data from the Phoenix Bedrock Mapping Project and Mamainse Point also consist of inductively coupled plasma mass spectrometer (ICP-MS) trace and rare earth elements, and inductively coupled plasma atomic emission spectroscopy (ICP-AES) base and precious metals and trace elements. Also included are rock descriptions and positional data in Universal Transverse Mercator (UTM) projection and grid system, Zone 16, North American Datum 1983. The data are available as Microsoft^® Excel 97 (.xls), Microsoft^® Word 97 (.doc) or ASCII text (.txt) files, and ArcView^® shape files on a single 3.5 inch diskette. $20.00.

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MRD 115 – Geological and Lithogeochemical Data from Mafic Ultramafic Bodies in Ontario as a Guide to Exploration for Platinum Group Element (PGE) Deposits: Operation Treasure Hunt

This digital release, jointly produced by the Ontario Geological Survey and the Mineral Exploration Research Centre of Laurentian University as part of an Operation Treasure Hunt project, consists of 2 database files: 1) new lithogeochemical data (major oxides and selected trace elements), field observations, and location information for 1438 samples from 109 mafic-ultramafic bodies in Ontario; and 2) petrographic descriptions for a majority of the samples included in the first database file. These data are available as Microsoft^® Excel (.xls) compressed files on one CD-ROM. $20.00.

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MRD 116 – Lake Sediment and Water Geochemical Data from the Dayohessarah Lake Area, Northeastern Ontario

Geochemical and quality control data for lake sediment and water samples collected from a survey of 1467 sites in the Dayohessarah Lake area are being released in conjunction with Open File Report 6103. Data are available as self-extracting zip files in Microsoft^® Excel (.xls) and Microsoft^® Word (.doc) formats one CD $20.00.

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MRD 117 – Satellite Image Maps, Northwestern Ontario

The Ontario Geological Survey, in partnership with the Canada Centre for Remote Sensing, Natural Resources Canada, is releasing digital files used to produce the 47, 1:100 000 scale paper versions of the Satellite Image Maps released in 2002 (P.3464 to P.3510). The Satellite Image Maps cover a large portion of the boreal forest region of northwestern Ontario , between latitudes 51° and 54°N and between longitude 87°W and the Manitoba–Ontario provincial boundary. They portray enhanced terrain conditions as viewed from space and provide a quasi-three-dimensional overview of the terrain and its conditions. The Satellite Image Maps are products of the fusion of a shaded digital elevation model (Hillshade) and Landsat Extended Thematic Mapper (Landsat ETM) or Landsat Thematic Mapper (Landsat TM) image and are effective in delineating areas with different terrain conditions. These maps are intermediate products of the joint project that has a primary goal to develop a process for terrain analysis that will produce maps similar to the Northern Ontario Engineering Geology Terrain Studies (NOEGTS) of the 1980s. The NOEGTS-type maps have been used for orienting, planning various types of ground survey operations (e.g., forest management, drift exploration, engineering) and for ecological land classification studies. Also provided are geo-referenced images of the individual image maps that can be used with various GIS software packages. The maps are available in compressed .tif file format on 3 CD-ROMs. $60.00.

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MRD 118 – Lake Sediment Geochemical Data from the Ignace Survey Area, Northwestern Ontario: Operation Treasure Hunt

Geochemical data for lake sediment and water quality samples collected from a survey of 2214 sites in the Ignace survey area of northwestern Ontario are being released in conjunction with Open File Report 6106. Data are available in Microsoft^® Excel (.xls) format. The data are available on one CD-ROM. $20.00.

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MRD 119 – Preliminary Indicator Mineral Results from the James Bay Lowland Sampling Program

This release consists of data related to kimberlite indicator minerals (KIMs), metamorphic/magmatic massive sulphide indicator minerals (MMSIMs^®) and gold grains recovered from 1083 modern alluvium samples collected in the James Bay Lowland. These data are being released in conjunction with Open File Report 6108. Files on this release contain information on sample site locations, mineral processing results for KIMs, electron microprobe data for garnet KIMs, mineral processing results for MMSIMs^®, gold grain results, and additional useful information not included in OFR 6108 such as tabling data and picking footnotes. Data is available as compressed files in ASCII (.txt) and Microsoft^® Excel (.xls) file format on one CD-ROM. $20.00.

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MRD 120 – Compilation of Geochemical Data from Komatiitic Rocks in the Abitibi Greenstone Belt, Ontario

Major and trace element data, Sm-Nd and Re-Os isotopic data, analyses of platinum group element (PGE) as well as sample descriptions and locations from komatiitic rocks in the 2.7 Ga Abitibi greenstone belt were released in conjunction with Open File Report 6073. The data set is compiled from published literature, provincial and federal government databases, an unpublished database compiled for Outokumpu Ltd. files by W. Stone and C.M. Lesher, and a suite of samples collected during this study. The data are available as Microsoft^® Excel (.xls) files on one CD-ROM. $20.00.

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MRD 121 – Modern Alluvium Data Release, Sault Ste. Marie–Espanola Area, Northeastern Ontario: Operation Treasure Hunt

This release consists of data resulting from heavy mineral processing of 720 samples collected over an area of approximately 21 000 km2 in the Sault Ste. Marie–Espanola area, northeastern Ontario. The data consist of kimberlite indicator minerals (KIMs), metamorphic/magmatic massive sulphide indicator minerals (MMSIM^®.) and gold grains recovered from modern alluvium samples. The data are being released in conjunction with Open File Report 6117. Files on this release contain information on sample site locations; abbreviations used; sample processing data; KIMs picked and picking remarks; microprobe analyses of KIMs; gold grain data; MMSIMs^® picked, picking remarks and assemblages present; and normalized KIM results. Data are available as compressed files in ASCII (.txt) and Microsoft^® Excel (.xls) file format. The data are available on one CD-ROM. $20.00..

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MRD 122 – Lake Sediment Analytical Data for the Savant Lake Area

Geochemical and quality control data for lake sediment and water collected from a survey in the Savant Lake Area are being released in conjunction with Open File Report 6118. Data are available in tab-delimited ASCII text (.txt) file format on one CD-ROM. $20.00.

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MRD 123 – Lithogeochemical Data for the Timmins West Area: Carscallen, Denton, Bristol, Ogden and Deloro Townships

This digital release comprises lithogeochemical analyses of 288 samples from the Timmins West area. The majority of the samples were taken from surface outcrops, supplemented with diamond-drill core samples, particularly in areas lacking outcrop. Accompanying these data are brief field descriptions. The lithogeochemical data include results for major oxides and selected trace elements. These data are available as a Microsoft^® Excel (.xls) file on one CD. $20.00.

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MRD 124 – Modern Alluvium Data Release, Cobalt-Elk Lake Area, Northeastern Ontario

This release consists of data resulting from heavy mineral processing of 183 samples collected over an area of approximately 2850 km² in the Cobalt-Elk Lake area, northeastern Ontario. The data consist of kimberlite indicator minerals (KIMs), metamorphic/magmatic massive sulphide indicator minerals (MMSIM^®) and gold grains recovered from modern alluvium, till and glaciofluvial sand and gravel samples. The data are being released in conjunction with Open File Report 6119. Files in this release contain information on sample site locations; abbreviations used; sample processing data; KIMs picked and picking remarks; microprobe analyses of KIMs; gold grain data; MMSIMs^® picked, picking remarks and assemblages present; pebble lithology data; and normalized KIM results. Data are available as compressed files in ASCII (.txt) and Microsoft^® Excel (.xls) file format on one CD-ROM. $20.00.

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MRD 125 – Heaven Lake and Lac des Iles Mapping Project: Whole Rock Lithogeochemical and Assay Data, and Diamond Drill Hole Compilation, Central Wabigoon Subprovince, Northwestern Ontario

This digital release consists of chemical analyses and compiled geological information utilized in the geological interpretation presented on preliminary maps P.3434 and P.3435 resulting from the Heaven Lake and Lac des Iles mapping projects. Whole rock chemical data for representative samples of the geologic units consist of X-ray fluorescence (XRF), fused and press powder, major and trace elements, inductively coupled plasma - mass spectrometer (ICP-MS) trace and rare earth elements and precious metals, and inductively coupled plasma-atomic emission spectroscopy (ICP-AES) metals and trace elements. Assay data for mineralized samples consist of ICP-AES metals and trace elements, with fire assay analyses for gold-related samples and ICP-MS precious metals for platinum group element (PGE)-related samples. Both lithogeochemical and assay samples have associated rock descriptions and positional data in Universal Transverse Mercator (UTM) coordinates. Information from the Ontario Drill Hole Database (ODHD) was expanded with data extracted from the Assessment File Resource Inventory (AFRI) and positions verified and included as UTM coordinates. A reference base of the geology from maps P.3434 and P.3435 is provided as ArcView^® 3.2 polygons in a UTM projection and grid system, Zone 16, North American Datum 1927. The data are available as Excel 97 (.xls), comma delimited (.csv), Word 97 (.doc) and tab-delimited ASCII text (.txt) files, and as ArcView^® 3.2 format shape and database files one CD $20.00.

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MRD 126-REV – 1:250 000 Scale Bedrock Geology of Ontario-Revised

The Precambrian Geoscience Section, Ontario Geological Survey, has compiled a 1:250 000 scale map of the bedrock geology of Ontario. The map has recently been revised and updated and replaces the map previously released on MRD 126. This new version also includes a complete update and revision of the bedrock geology for the Abitibi greenstone belt. This seamless GIS data set includes such themes as bedrock units, major faults, dike swarms, iron formations and kimberlites. Data are provided in North American Datum (NAD) geographic co-ordinate systems, NAD83 and NAD27, in ESRI^® shapefile format and include legend and project files. Provincial-scale geophysical images are also provided as georeferenced TIFF files. GIS software such as ArcExplorer^®, ArcView^® or ArcGIS^® can be used to view and query the shapefiles. Details of the GIS data sets are provided in a readme file and a more comprehensive metadata file. The data are available on 1 CD-ROM. $20.00.

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MRD 127 – Electron Microprobe Analyses of Minerals from Fertile Peraluminous Granites and Related Rare-element Pegmatites, Superior Province, Northwest Ontario: Operation Treasure Hunt*

This release contains electron microprobe data for sample localities described in Open File Report (OFR) 6099, which was published in March 2003. The minerals analyzed are from McCombe pegmatite, Consolidated Morrison pegmatite, Tebishogeshik pegmatite, Chappais pegmatite, Falcon Lake pegmatite, Dryden pegmatite field, MNW pegmatite and Buda feldspar dike. All of the UTM coordinates and zones for sample localities are provided in a separate table. The data consist of 5172 mineral compositions (from pegmatites and fertile granites) analyzed by an electron microprobe in 16 tables. This release also contains a table consisting of an overall summary of minerals that were analyzed by an electron microprobe for each sample and for each locality. All of the microprobe analyses were performed by A.G. Tindle at The Open University, except for selected tourmaline and garnet samples, which were analyzed by the Geoscience Laboratories, Ministry of Northern Development and Mines, Sudbury, Ontario. Data are available as compressed files in Microsoft^® Excel (.xls) format and comma-delimited (.csv) files on 1 CD-ROM. $20.00.

* This digital release was jointly produced by the Ontario Geological Survey and The Open University, United Kingdom, as part of an Operation Treasure Hunt project.

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MRD 128 – Surficial Geology of Southern Ontario

In response to the demand for readily accessible and easily understood information on the surficial sediments of southern Ontario, the Ontario Geological Survey, Sedimentary Geoscience Section has generated a GIS based, seamless map of the surficial geology for southern Ontario. A total of 124 maps, 36 of which belong to the Geological Survey of Canada, were used to create the seamless coverage. The original tiled maps were primarily at a scale of 1:50 000. Surficial geology map data is provided as ESRI^® ArcInfo^® coverages in UTM zones 17 and 18, NAD83 as well as for all of southern Ontario in geographic coordinate system NAD83, decimal degrees. The map data set consists of 7 coverages capturing information on Quaternary geological units; sand and gravel pits; linear features, such as eskers and bluffs; point features, such as drumlins and striae; as well as other polygonal coverages, including hummocky topography and moraines. Also included is a shaded relief image (JPEG) created using the digital elevation model (DEM) produced by the Ontario Ministry of Natural Resources. Other information provided includes a user document and readme file which explain the GIS process, coverages, metadata and a “Getting Started” section. Data are available in ArcGIS^® with a completed project file (.mxd). The data are available on 2 CD-ROMs. $40.00.

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MRD 129 – Modern Alluvium Data Release, Kirkland Lake–Matachewan Area, Northeastern Ontario

This release consists of data resulting from heavy mineral processing of 357 samples collected over an area of approximately 5500 km2 in the Kirkland Lake–Matachewan area of northeastern Ontario. The data consist of kimberlite indicator minerals (KIMs), metamorphosed magmatic/massive sulphide indicator minerals (MMSIM^®) and gold grains recovered from modern alluvium, till and glaciofluvial sand and gravel samples. The data are being released in conjunction with Open File Report 6124. Files on this release contain information on sample site locations; abbreviations used; sample processing data; KIMs picked and picking remarks; microprobe analyses of KIMs; gold grain data; MMSIMs picked, picking remarks and assemblages present; pebble lithology data; and normalized KIM results. Data are available in ASCII (.txt) and Microsoft^® Excel (.xls) file formats on 1 CD-ROM. $20.00.

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MRD 130 – Lake Sediment and Water Data for the Sturgeon Lake–Wabigoon Lake Area

Geochemical and quality control data for lake sediment and water collected from a survey of 1337 sites in the Sturgeon Lake-Wabigoon Lake area was released in conjunction with Open File Report 6125. Data are available as tab-delimited ASCII text (.txt) and Microsoft^® Excel 97 (.xls) files on one CD-ROM. $20.00.

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MRD 131 – Lake Sediment and Water Quality Data from the Sudbury Area, Northeastern Ontario

Lake sediment geochemical and lake water quality (limnological) data, including quality control data, collected from a survey of 1489 sites in the Sudbury area was released in conjunction with Open File Report 6126. Data are available as Microsoft^® Excel 97 (.xls) files on one CD-ROM. $20.00.

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MRD 132 – Geological and Lithogeochemical Data from the Northwest Nipigon Embayment, Lake Nipigon Region Geoscience Initiative (LNRGI)

This digital data release produced by the Ontario Geological Survey as part of the Lake Nipigon Region Geoscience Initiative (LNRGI) contains new geological and lithogeochemical data from the northwest Nipigon Embayment collected during the 2003 mapping season, and is being released in conjunction with Open File Report 6136. The geological data consists of lithologies, magnetic susceptibility measurements, as well as elevation and positional data for 624 stations visited. The x-y positional data are given in Universal Transverse Mercator (UTM) projection and grid system, Zone 16, North American Datum 1983. Selected photos are also presented for many of the outcrop stations. Available drill core data are also part of this release. The new analytical data are for 326 samples collected from the Nipigon diabase sills, the Archean basement rocks, and alkalic intrusions, and consist of specific gravity measurements, major oxide, trace element, and assay data. These data are organized in spreadsheets in Microsoft^® Excel 97 (.xls) and in text files (.txt) on one CD-ROM. $20.00.

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MRD 133 – Northern Black Sturgeon River-Disraeli Lake Area, Nipigon Embayment, Northwestern Ontario: Lithogeochemical, Assay and Compilation Data

This digital data release consists of chemical analyses and diamond drill hole information utilized in the geological interpretation presented on preliminary maps P.3538 and P.3539 as a result of mapping in the northern Black Sturgeon River to Disraeli Lake area of the Nipigon Embayment. The data are being released in conjunction with Open File Report 6138 and Preliminary Map P.3540. Both lithogeochemical and assay samples have associated rock descriptions and locations. Information from the Ontario Drill Hole Database (ODHD), supplemented with drilling information provided by companies currently exploring, or that have conducted past exploration, in this area, had drill hole positions verified and included as Universal Transverse Mercator (UTM) co-ordinates. Magnetic susceptibility measurements for most stations visited during the mapping project are annotated with the rock descriptions and locations. Also included are basic rock type information for the field mapping stations and photographic images labelled with locations, as well as a preliminary version of the thin section database. All positional data are provided in UTM projection and grid system, North American Datum 1983 (NAD83), Zone 16. The data are available as Microsoft^® Excel 97 (.xls), Microsoft^® Word 97 (.doc), rich-text format (.rtf) or tab-delimited ASCII text (.txt) files, a Microsoft^® Access (.mdb) file, and image (.jpg) files on one CD-ROM. $20.00.

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MRD 134 – Detectability of Mineral Deposits with Airborne Gravity Gradiometry

This digital release consists of six three-dimensional geological models, broadly representative of ore bodies and their host environments, covering 4 general exploration target types: 1) kimberlite deposits (synthetic); 2) volcanogenic massive sulphide (VMS) deposits (BMS#12 and San Nicolas); 3) copper-porphyry deposits (Spence); and 4) sedimentary-hosted exhalative (Sedex) deposits (Gamsberg and Red Dog). The modeling files are viewable using University of British Columbia's Geophysical Inversion Facility viewer (provided), and are available on two CD-ROMs. $40.00.

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MRD 135 – Rock Samples and Chemical Analyses of Rocks and Minerals, Northern Superior Area, Ontario

This release consists of data related to rock samples and the chemical analyses of rocks and minerals collected from the northern Superior area, 350 km north of Red Lake, Ontario, between 1995 and 2004. The data are being released in conjunction with Open File Report 6140 and Preliminary Map P.3545. The release comprises 9 tables of data on sample locations and descriptions, and chemical analyses of amphibole, biotite, chlorite, feldspar, garnet, muscovite, pyroxene, spinel and staurolite. Also included are 2 tables of chemical analyses of rock samples and a detailed map legend. The data are available as Microsoft^® Excel (.xls) and corresponding comma-delimited text files (.csv), and as Microsoft^® Word (.doc) and corresponding PDF (Adobe^® Acrobat^®) files, on 1 CD-ROM. $20.00.

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MRD 136 – Geochemical Data for Selective Leach Signatures over Kimberlites and Other Targets

This digital data release contains Enzyme Leach^SM, aqua regia, pH and loss-on-ignition data for sample localities described in Open File Report (OFR) 6142. Bar graphs generated for the Enzyme Leach^SM and aqua regia data are also included in this release. Clusters of 3 upper and 3 lower soil samples were obtained from kimberlites, carbonatites, proven non-kimberlite magnetic anomalies and blind targets. Clusters of samples were obtained from background areas away from the targets for comparative purposes. Peat, sand, clay and alluvium kimberlite sites were sampled. The remaining targets were all sand sites. Other information provided includes sampling site locations and sample descriptions. The data are available as Microsoft. Excel (.xls) files and the bar graphs are available as PDF (Adobe^® Acrobat^®) files on one CD-ROM. $20.00

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MRD 137 – Lake Sediment and Water Quality Data for the Temagami Area, Northeastern Ontario

Lake sediment geochemical and lake water quality (limnological) data, including quality control data, collected from a survey of 2763 sites in the Temagami area are being released in conjunction with Open File Report 6144. Data are available as ASCII (.txt) and Microsoft^® Excel (.xls) file formats on one CD-ROM. $20.00

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MRD 138 – Airborne Hyperspectral Surface Mapping over Exposed and Covered Mineral Belts in Ontario

This digital release presents the results of visible and near-infrared (VISNIR) data collected with the AURORA hyperspectral scanner over selected mineral belt sites in the Sudbury and Timmins areas. Hyperspectral data for 4 areas in the Sudbury area, 3 in the Timmins area and documentation, in the form of 5 reports in portable document format (PDF), is available on 1 external USB Maxtor 120 GB hardrive. $ 300.00

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MRD 139 – Demonstration Surveys of the Distributed Acquisition (MT/IP) Method Earth Imaging Technology

This digital release presents the results of surveys performed to demonstrate a new deep exploration geophysical technology, the Titan-24, which is a multi-channel, distributed acquisition system, recording broad band magnetotelluric data (AMT/MT), DC resistivity and induced polarization (IP). Four survey areas were chosen to demonstrate and evaluate Titan's capability of mapping geology and detecting anomalous mineralization in areas of thick overburden or noise-contaminated mine site environments: 1) Kidd Creek Mine, Timmins; 2) Dixie and Ben Lake properties, Red Lake; 3) Red Lake and Marcus, near Red Lake and Cochenour mine sites, Red Lake; and 4) Norman and Levack mine sites, Sudbury. Data, plot, and report (PDF and/or Microsoft^® Word) files are available on 3 CD-ROMs. $60.00

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MRD 140 – Lake Nipigon Region Geoscience Initiative (LNRGI) Lineament Analysis

In response to a request by the Ontario Prospectors Association (OPA), a lineament analysis was performed to help in defining the structural fabric of the Lake Nipigon Plate. Lineaments are linear features on the earth's surface that are visible in remotely sensed data or on maps. The lineament analysis is but one part of a major research and data collection effort-the Lake Nipigon Region Geoscience Initiative (LNRGI)-undertaken by the OPA with financial support from the Northern Ontario Heritage Fund Corporation. The data in this release consist of individual shapefiles of the lineaments interpreted from various sources (air photographs, Landsat, RADARSAT, Digital Elevation Model (DEM) and derivatives). No interpretation of lineament origin is given, except for the exclusion of lineaments interpreted as being of glacial origin. All lineament types were combined and annotated to create a new dataset, then coinciding lineaments were amalgamated to create a clean dataset. Various base, source and reference information is also included as shapefiles and TIFF (.tif) images. All datasets are in UTM Zone 16 NAD 83. Available on 1 CD-ROM. $20.00

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MRD 141 – Petrographic Data from the Northwest Nipigon Embayment, Lake Nipigon Region Geoscience Initiative (LNRGI)

This digital data release, produced as part of the Lake Nipigon Region Geoscience Initiative (LNRGI), contains location information, rock descriptions, detailed petrographic descriptions, microphotographs and qualitative modal analyses for 250 thin sections collected within the 2003 LNRGI bedrock mapping project area (South Armstrong-Gull Bay area, see Ontario Geological Survey Open File Report 6136 and/or Miscellaneous Release-Data 132). Location information is given in the Universal Transverse Mercator (UTM) projection and grid system, Zone 16, North American Datum 1983. Samples are mainly from Nipigon diabase sills, Archean basement rocks, and the English Bay Complex. These data are organized in PDF (Adobe^® Acrobat^®) files on 1 CD-ROM. $20.00

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MRD 142 – Lineament Extraction from Digital Elevation Model (DEM) for the Province of Ontario

This release presents results of testing of the automated lineament extraction process developed for the Lake Nipigon Region Geoscience Initiative (LNRGI). The automated process was applied to the Shuttle RADAR Topography Mission (SRTM) digital elevation model (DEM) for the province of Ontario, acquired from the United States Geological Survey web site. Two analyses were performed using the process, resulting in products that delineate linear features that correspond to faults identified on Geology of Ontario 1:1 000 000 scale bedrock geology maps and many other features related to the bedrock structural fabric. Together, these products identify various-sized lineaments that may be useful in identifying the structural fabric of Ontario, in particular the region of the Canadian Shield. No interpretation of lineament origin is given. The extracted lineaments, shaded relief and DEM are provided in ESRI^® grid format. The lineament data are also provided in TIFF (.tif) format and zipped. These data sets are in Geographic Coordinate System WGS 84. Base data (Geology of Ontario (GOO) Bedrock Geology 1:1 000 000, Geology of Ontario (GOO) Quaternary Geology 1:1 000 000, and Lakes) are provided in ESRI^® shapefile format in Geographic Coordinate System NAD 83. Available on 1 CD-ROM. $20.00

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MRD 143 – Geological Compilation of the Abitibi Greenstone Belt

This release comprises a compilation of the five 1:100 000 scale geological maps and GIS data sets previously published for the Abitibi greenstone belt (maps P.3379, P.3398, P.3425, P.3511 and P.3527; miscellaneous releases of data MRD 36, MRD 46, MRD 58, MRD 93 and MRD 94). The Abitibi greenstone belt is one of the world's largest, best preserved and most economically productive greenstone belts in the world. This release includes details of the geology and structure of the area, as well as type, size and commodities present in the area's known mineral deposits. Geophysical and lithogeochemical data is also included. Data are available in ArcMap^® 8.3 as coverages and shapefiles. Details of the ArcMap^® data sets are provided in a readme.txt file as well as a more comprehensive metadata.txt file. The data are available on 2 CD-ROMs. $40.00.

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MRD 144 – Geochemical, Petrographic and Compilation Data from the Genex Mine Area, Kamiskotia Area

This digital data release, produced as part of the Discover Abitibi Initiative, is being released in conjunction with Open File Report 6156. This release contains 1) ArcMap^® files for a 1:2500 scale geological map of the Genex Mine area in Godfrey Township (Figure 56 in OFR 6156); 2) colour versions (.tif) of two 1:100 scale maps and a 1:50 scale map (Figures 10, 11and 12, respectively, in OFR 6156; 3) drill core photographs; 4) drill logs; 5) geochemical analyses; 6) outcrop photographs; 7) petrographic descriptions; and 8) photomicrographs. The data are available as Microsoft^® Word 2002 (.doc), Microsoft^® Access 97 and 2002 (.mdb), Microsoft^®Excel 2002 (.xls), ArcMap^® 8.3 (.mxd), and image (.jpg and .tif) files on one CD-ROM. $20.00.

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MRD 145 – Lake Sediment and Water Analytical Data for the Eagle Lake Area, Northwestern Ontario

Lake sediment geochemical and lake water quality (limnological) data, including quality control data, collected from a survey of 932 sites in the Eagle Lake area, are being released in conjunction with Open File Report 6104. Data are available as Microsoft^® Excel 97 (.xls) files on one CD-ROM. $20.00

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MRD 146 – Geological and Lithogeochemical Data from the Western Nipigon Embayment, 2003 and 2004, Lake Nipigon Region Geoscience Initiative (LNRGI)

This digital data release, produced by the Ontario Geological Survey as part of the Lake Nipigon Region Geoscience Initiative (LNRGI), contains new geological and lithogeochemical data from the west-central Nipigon Embayment collected during the 2004 mapping season. Lithogeochemical data from the 2003 northwest map area are also included with this release. These data are being released in conjunction with OFR 6164 and Preliminary Maps P.3559, P.3560, and P.3561. The new geological data consist of sample locations and elevations, field rock names, and magnetic susceptibility measurements. Location data for 1151 stations are given in Universal Transverse Mercator (UTM) projection and grid system, Zone 16, North American Datum 1983 (NAD83). Selected photographs are also included for many of the 2004 outcrop stations. Drill-hole logs, magnetic susceptibility and photographs, where available, are also included. The lithogeochemical data are for 671 samples collected during the 2003 and 2004 mapping seasons, and include Nipigon diabase sills, Archean basement rocks, and the English Bay complex. The lithogeochemical data files consist of specific gravity measurements, major oxide, trace element, and assay analyses. These data are organized in spreadsheets in Microsoft^® Excel 97 (.xls) and in text files (.txt) on one CD-ROM. $20.00

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MRD 147 – Southern Black Sturgeon River–Seagull Lake Area, Nipigon Embayment, Northwestern Ontario: Lithogeochemical, Assay and Compilation Data

This digital data release consists of chemical analyses and diamond-drill hole information utilized in the geological interpretation presented on Preliminary Maps P.3562 and P.3563 as a result of mapping in the southern Black Sturgeon River to Seagull Lake area of the Nipigon Embayment, and is being released in conjunction with OFR 6165. Whole rock chemical data for representative samples consist of X-ray fluorescence (XRF), fused and pressed powder, major and trace elements, inductively coupled plasma mass spectrometry (ICP–MS) trace and rare earth elements and precious metals, inductively coupled plasma atomic emission spectroscopy (ICP–AES) metals and trace elements, and specific gravity measurements. Platinum group element analyses for a limited number of samples were completed using nickel fire assay–ICP–MS. Assay data for mineralized samples consist of metal and trace element analyses using ICP–AES. Both lithogeochemical and assay samples have associated rock descriptions and locations. Information from the Ontario Drill Hole Database (ODHD), supplemented with drilling information provided by companies currently exploring, or that have conducted past exploration, in this area, had drill hole positions verified and included as Universal Transverse Mercator (UTM) co-ordinates. Magnetic susceptibility measurements for most stations visited during the mapping project are annotated with the rock descriptions and locations. Also included are basic rock type information for the field mapping stations and photographic images labelled with locations. All positional data are provided in UTM projection and grid system, North American Datum 1983 (NAD83), Zone 16. The data are available as Microsoft^® Excel 97 (.xls), Microsoft^® Word 97 (.doc) or tab-delimited ASCII text (.txt) files, and image (.jpg) files on one CD-ROM. $20.00

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MRD 148 – Three Dimensional Modeling of Overburden in the Timmins–Kirkland Lake Region: Discover Abitibi Initiative

This digital release produced as part of the Discover Abitibi Initiative provides data sets that model the three-dimensional distribution and thickness of the surficial sediments in an area north of Timmins. Overburden drill hole records compiled by the Geological Survey of Canada (GSC Open File 3086) and additional drill hole records obtained for this study were used to generate three-dimensional surfaces and cross sections representing major stratigraphic units. The Ontario Geological Survey, Sedimentary Geoscience Section, also compiled a 1:100 000 scale, GIS based, seamless surficial geology map for the region. This compilation was based on existing 1:50 000 scale Quaternary maps available for the area. Map data are available in ESRI^® ArcMap^® 8.1 as coverages and completed .mxd project files. The three-dimensional surfaces are provided in ESRI^® grid format. Cross sections and Quaternary map are available as ESRI^® coverages as well as in portable document format (.pdf). Updates to the Overburden Drill Hole database are provided in Microsoft^® Excel. Also included in this release is a stand-alone viewer that allows the user to generate cross sections “on-the-fly”. All data sets are in UTM Zone 17 NAD 83. The data and user documentation are available on 1 CD-ROM. $20.00

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MRD 149 – Lithogeochemical and Magnetic Susceptibility Data for the Opikeigen Lake Area

This digital release comprises major oxide and selected trace element analyses, gold and platinum group element assays, magnetic susceptibility data and brief field descriptions for outcrop in the Opikeigen Lake area. The data were used in the geological interpretation presented on Preliminary Map P.3269. Analytical and magnetic susceptibility data are available as Microsoft^® Excel (.xls) and comma-delimited (.csv) files; the relevant part of the legend for Map P.3269 is available as Microsoft^® Word (.doc) and portable document (.pdf) files. One CD-ROM. $20.00

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MRD 150 – Lake Sediment and Water Geochemical Data for the South Swayze Area, Northeastern Ontario

Geochemical and water quality (limnological) data, including quality control data, from lake sediment and water samples collected from 1051 sites in the South Swayze area are being released in conjunction with Open File Report 6166. Data are available in Microsoft^® Excel (.xls) and comma-delimited (.csv) file format on one CD-ROM. $20.00.

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MRD 151 – Lithogeochemical Data and Field Photographs for the Wawa Area: Menzies and Musquash Townships

This digital release comprises results from lithogeochemical analyses of 211 samples collected as part of an on-going bedrock mapping project in the Wawa area. Some of the samples were collected from diamond-bearing breccias and lamprophyre dikes. The majority of the samples were taken from surface outcrops, supplemented with diamond-drill core samples. Accompanying these data are photographs from the outcrops where the samples were taken. The lithogeochemical data include results for major oxides and selected trace elements, which are available as a Microsoft^® Excel (.xls) file. The photographs are available in JPEG bitmaps format (.jpg) and are accompanied by a Microsoft^® Excel (.xls) file containing brief captions. All of these data are offered on one CD-ROM. $20.00

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MRD 152 – Lowlands Drill Hole Data Compilation

This digital release is a compilation of drill hole data within the James Bay and Hudson Bay lowlands, constructed as part of the Far North Precambrian Basement Interpretation project. Included in this compilation are 259 drill holes reaching Precambrian bedrock. Drill hole records have been compiled from OGS assessment files, and in-kind industry contributions. Data included in this MRD include collar location, company information, source of data, hole azimuth and dip, total depth, depth to bedrock, and lithology of bedrock. Drill hole locations are provided in geographic NAD83 co-ordinate system, and UTM NAD83 projection. Data are provided in Microsoft^® Access, Microsoft^® Excel, and ESRI^® shape file formats. A location map is also included in portable document format (.pdf). Details of these data are provided in a readme file, as well as a comprehensive metadata file. Available on one CD-ROM. $20.00

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MRD 153 – Ontario Geochemistry and Indicator Mineral Database

This release provides a database of project-related data generated by the Sedimentary Geoscience Section of the Ontario Geological Survey, including lake sediment and lake water geochemistry, indicator mineral data and overburden geochemistry. The database was compiled from 79 already published individual data sets. It contains information about 67 000 sample locations, 140 000 samples and 5.9 million geochemical analytical values, in addition to information about indicator minerals, gold grains and other data. The data are current to mid-2003. Microsoft^® Access 2002 or later software is required to use the database. Documentation is in Microsoft^® Word 97 format. ESRI^® ArcGIS^® 8.3 or later, including ArcView^® 8.3, may optionally be used to open the provided GIS projects. ESRI^® shape files are also provided for some of the data, and these files may be used with other software, including free GIS. Available on one DVD. $25.00

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MRD 154 – Surficial Geochemistry Case Studies Project Digital Data Set, Lake Nipigon Region, Northwestern Ontario

This digital data release, produced by the Ontario Geological Survey as part of the Lake Nipigon Region Geoscience Initiative (LNRGI), contains surficial geochemical, lithogeochemical and indicator mineral data from the northwest Nipigon Embayment collected during the 2003 and 2004 field seasons. The data are being released in conjunction with the forthcoming Open File Report 6167. The geochemical data set comprises the results of analyses of soil, rock, stream sediment, lake sediment, peat and water for over 50 elements, and includes major oxide, trace element, and assay data from the analysis of 86 samples collected from Nipigon diabase sills. The mineral indicator data set includes platinum group element indicator minerals, kimberlite indicator minerals, metamorphic/magmatic massive sulphide indicator minerals and gold grains recovered from till and modern alluvium samples. Magnetic susceptibility data for all rocks collected are also included. All geochemical quality control data from field duplicates, analytical duplicates, certified reference materials and blanks are included in separate files. The data, and associated documents, are available in Microsoft^® Excel 97 (.xls), ArcView^® shapefile (.shp) and portable document (.pdf) formats on one CD-ROM. $20.00

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MRD 155 – Digital Compilation of Maps and Data from the Greenstone Architecture Project in the Timmins-Kirkland Lake Region: Discover Abitibi Initiative

This digital release was produced as part of the Discover Abitibi Initiative and contains digital data from the Greenstone Architecture Project carried out by the Mineral Exploration Research Centre of Laurentian University and the Ontario Geological Survey under the Discover Abitibi Initative. The digital data included in this compilation includes the digital maps, field collection data and lithogeochemical data from 8 Ontario Geological Survey preliminary maps (P.3543-Revised, P.3544-Revised, P.3546-Revised, P.3547-Revised, P.3555, P.3556, P.3557, and P.3558); a metamorphic map and tabular metamorphic data from Ontario Geological Survey, Open File Report 6162; and a lithostratigraphic assemblages map and tabular geochronological data from Ontario Geological Survey, Open File Report 6154. Data files in this compilation are provided as ArcView^® shape (SHP) files. Users with limited access to software and hardware, limited knowledge or experience with GIS (Geographical Information Systems) can access the compiled maps listed above using ArcReader^®, a free viewer available for download from ESRI. Experienced users can access the data files and compiled map files using ESRI ArcGIS^® version 8.x. Legends of the original maps are provided in portable document format (PDF). All data sets are in UTM Zone 17 NAD 83. The data and user documentation are available on one CD-ROM. $20.00.

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MRD 156 – Petrographic Data from the West-Central Nipigon Embayment, Lake Nipigon Region Geoscience Initiative

This digital data release, produced as part of the Lake Nipigon Region Geoscience Initiative (LNRGI), contains location information, rock descriptions, detailed petrographic descriptions, photomicrographs and qualitative modal analyses for 150 thin sections collected within the 2004 LNRGI bedrock mapping project area (west-central map area, see previously released Ontario Geological Survey Open File Report 6164 and/or Miscellaneous Release—Data 146). Also included are Cl in phlogopite and Ni in olivine mineral chemistry data for 20 samples collected from the Disraeli, Eva–Kitto, Hele and Seagull ultramafic intrusions. Location information is given in the Universal Transverse Mercator (UTM) projection and grid system, Zone 16, North American Datum 1983. Samples are mainly from Nipigon diabase sills, Nipigon ultramafic intrusions and Archean basement rocks. These data are available as portable document format (.pdf), Microsoft^® Word (.doc) and Microsoft^® Excel 97 (.xls) files on one CD-ROM. $20.00.

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MRD 157 – 3D Mineral Deposit Models - Full Models as FracSIS Database Files: Discover Abitibi Initiative

Released in conjunction with Open File Report 6168 and maps P.3566 to P.3575. Please note: the viewer needed for this software must be downloaded from the company's website. Instructions for downloading are included. Available on one DVD. $25.00.

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MRD 158 – 3D Mineral Deposit Models - Raider3D^® Model Capture Files: Discover Abitibi Initiative

Released in conjunction with Open File Report 6168 and maps P.3566 to P.3575. Please note: the viewer needed for this software must be downloaded from the company's website. Instructions for downloading are included. Available on one CD-ROM. $20.00.

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MRD 159 – Lithogeochemical Data for Plutonic Rocks Sampled Between 2000 and 2003

This release contains 3 Microsoft^® Excel spreadsheets providing sample numbers, locations and whole rock major and trace element geochemical data for 169 samples. These samples were collected by the author between 2000 and 2003 as part of a long-term project (“Characteristics of Mineralized and Unmineralized Intermediate to Felsic Plutonic Systems”) that will be described in future reports. All locations are provided as Univeral Transverse Mercator (UTM) co-ordinates, North American Datum 1983 (NAD83). These data are released as Microsoft^® Excel (.xls) files without interpretation on one CD-ROM. $20.00.

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MRD 160 – Digital Northern Ontario Engineering Geology Terrain Study (NOEGTS)

This digital map data product contains the Northern Ontario Engineering Geology Terrain Study (NOEGTS) map data for northern Ontario, Canada. The product is a geographic information system (GIS)–based map of engineering geology terrain studies, which are evaluations of near-surface geological conditions with a view to determining the engineering capability of the terrain. The original data, as well as the digital version of NOEGTS, are at a reconnaissance level and designed to provide an overview of the terrain conditions, and a database on which to undertake more site-specific studies. The scale of the NOEGTS data is 1:100 000. There are 2 CD-ROM disks in the Northern Ontario Engineering Geology Terrain Study (NOEGTS) map data release. Disk 1 contains a complete set of data in geographic projection (decimal degrees, NAD 83 datum). Each of the 104 individual NOEGTS maps were appended together into one ArcInfo^® coverage. The tiled structure has been maintained. Edge matching of polygons was not completed. Disk 2 contains the same data, but in Universal Transverse Mercator (UTM) co-ordinate system, NAD 83 datum. Each NOEGTS exists as an individual tile. The NOEGTS tiles cover UTM zones 15, 16, 17 and zone 18 datasets. A NOEGTS viewer is provided which allows the user to select the desired NOEGTS (tiles) from an index map and display it with a standard legend and symbology. The data and user documentation are available on two CD-ROMs. $40.00.

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MRD 161 – Additional Indicator Mineral Results from the James Bay Lowland Sampling Program

This release consists of data related to kimberlite indicator minerals (KIMs) recovered from 1083 modern alluvium samples collected in the James Bay Lowland. Files on this release contain information on sample site locations, estimated numbers of KIMs and mineral chemistry for chromite, ilmenite, pyroxene and olivine KIMs. A file indicating the analytical conditions used to acquire the mineral chemistry is also included. This digital data release is the second produced in conjunction with Open File Report 6108. OFR 6108 and MRD 119 were released in 2003. The data are available as Microsoft^® Excel (.xls) and comma-delimited (.csv) files on one CD-ROM. $20.00.

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MRD 162 – Magnetic and Gravity 3D Modelling Products: Discover Abitibi Initiative

This digital release was produced as part of the Discover Abitibi Initiative and consists of all the digital products of three-dimensional (3D) inversions discussed in Open File Report (OFR) 6163. The contents of this release consist of images and data for 10 study areas from west of Timmins to east of Kirkland Lake. All areas (except one) have been reported on through publications of the Discover Abitibi Initiative. Images are available as tagged image file format (.tif) and as bitmap (.bmp) files (accessible through various Windows-based viewing systems), which show the geology and many views of the 3D inversion of the magnetic and gravity data for each area. Binary (.bin) files are included for viewing using a three-dimensional viewer. Software (WinDisp 3DViewer version 3.00) for viewing the products of the 3D inversions and instructions for its use (in portable document format) are included with this release. Digital files (e.g., .sus and .den), which are the products of the University of British Columbia Geophysical Inversion Facility (UBC–GIF) magnetic and gravity inversion programs, are presented for use in other imaging systems or software. A detailed description of the contents of the disk is found in a readme file. The data in this release strongly augment OFR 6163, a digital version of which is provided in portable document format. All data sets are presented in Universal Transverse Mercator (UTM) Zone 17 using North American Datum (NAD83). The data and user documentation are available on one DVD. $25.00.

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MRD 163 – Images and Processed Data for Two-Dimensional (2D) Reflection Seismic Surveying in the Timmins–Kirkland Lake Area, Northern Ontario; Acquisition, Processing, Interpretation: Discover Abitibi Initiative

This digital release contains the processed data and products of the Timmins–Kirkland Lake 2D reflection seismic survey and is being released in conjunction with Open File Report 6169 and the forthcoming Geophysical Data Set 1054. Data, in SEGY format, are presented for final Migrated Dip Moveout (DMO) and Structure Stack, both filtered and unfiltered components, and Velocity Stack as Interval and root-mean-square (RMS) components. Receiver and source statics are also presented. Final Migrated DMO sections (in .jpg and portable document file formats) include seismic sections, processing sequence and additional processing information, ground and bedrock surface profiles, and geology location maps showing line traverse locations. Common Depth Point (CDP) and surveyed shotpoint data are provided. The image locations of these lines are also presented as Geosoft^® .plt files. Density and pressure wave results of the seismic rock properties study are provided in a Microsoft^® Excel (.xls) file. Viewing software will be required to view the .sgy files. Links are provided to various sources on the Web from which viewing software may be obtained. Acquisition and processing reports and a digital version of OFR 6169 are provided in portable document format. Available on 1 DVD. $25.00.

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MRD 164 – Three Dimensional Surficial Geochemistry

This digital release presents results for the third phase of ongoing research into understanding the processes and mechanisms and improving the application of surficial selective extraction geochemical techniques to effectively detect and discriminate various types of buried ore deposits. This multi-faceted project focussed on 5 areas of differing overburden and styles of buried mineralization in northeastern Ontario and northern Québec. Report files (in portable document format (.pdf) and Microsoft^® Word (.doc) and database files (in portable document format (.pdf) and Microsoft^® Access 2002 (.mdb) are on 1 CD-ROM. $20.00.

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MRD 165 – Use of a Soil Gas Hydrocarbon Technique to Differentiate Barren Graphitic and Sulphidic Conductors from Ore-Bearing Conductors

This project aimed to better understand and test the use of the soil gas hydrocarbon (SGH) laboratory method as a geochemical tool to locate buried ore deposits. B-horizon soil samples and core samples were collected at 26 survey sites (selected by industry and provincial government sponsors) and analyzed by the SGH method. The survey sites represented gold, volcanogenic massive sulphide (VMS), uranium, nickel, sedimentary-hosted exhalative (SEDEX) and kimberlite mineralization types. Microbiological experiments were conducted to better understand the possible origins of the 162 soil gas hydrocarbons in the C5 to C17 carbon series range and what role the bacteria may have in SGH signatures. Report files (in portable document format (.pdf) and Microsoft^® Word (.doc) are on 1 CD-ROM. $20.00.

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MRD 166 – Gedex Airborne Gravity Gradiometer (AGG) System

This project focussed on research, development and testing of a prototype high-resolution airborne gravity gradiometer (AGG) system capable of detecting mineral deposits that are invisible to other airborne gravity survey systems. Extensive modelling and analysis was conducted that validated and improved the design of Gedex’s prototype gravity gradiometer instrument. Laboratory and in-flight testing of vibration isolation mounts were also conducted and precise data on acceleration and vibrations of a variety of survey aircraft were collected. Report files (in portable document format (.pdf) are on 1 CD-ROM. $20.00.

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MRD 167 – Modelling, Interpretation Methods and Field Trials of an Existing Prototype Audio Frequency Magnetics (AFMAG) System

The aim of this study was to develop and test an existing prototype airborne audio frequency magnetics (AFMAG) system, a technology that operates using natural electromagnetic fields over a wide frequency range, allowing deeper depths of penetration and reducing the masking effect of small, shallow conductors. The scope of the project consisted of numerical modelling of AFMAG responses; development of new airborne and ground base-station instrumentation to allow for more sensitive measurements; development of signal-processing procedures to reject cultural noise; development of data presentation methodology; and field testing to demonstrate the newly developed instrumentation, software and methodology. Preliminary helicopter-borne field testing was carried out in 2002 over the Reid–Mahaffy test area, near Timmins, and over a portion of Vermillion Lake, near Sudbury. Noise tests of fixed-wing aircraft were also carried out. A second set of field trials was carried out in 2004 over Vermillion Lake / West Range and the North Range of the Sudbury Igneous Complex, and over the Trillabelle deposit. In addition, 2 long traverses were flown from Sudbury to Timmins to collect a long airborne record to help analyze the noise characteristics of the system. The final report for the study (in portable document format (.pdf), along with the data acquired (in various Geosoft^® file formats), and the Geosoft^® GXs that were developed to process the data, are on 1 CD-ROM. $20.00.

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MRD 168 – Three Dimensional Geochemistry in the Abitibi: Development of Geochemical Exploration Methods

This project continued previous work carried out under the CAMIRO “Deep Penetrating Geochemistry” (DPG) Project, extending the research at Cross Lake and the Marsh Zone, near Timmins, Ontario, to develop and test methods of exploration through thick cover in northern Ontario. This project focussed on the geochemical signatures of soils developed on thick glacial overburden. Objectives were to improve knowledge of the processes by which elements migrate from buried mineralization and become fixed at surface, and to develop protocols involving the use of appropriate partial leaches of soils that will guide explorationists in the application of this methodology in the clay belt of Ontario. Report files (in hypertext markup language (.html) and portable document format (.pdf), data files (in hypertext markup language (.html), Microsoft®Access 2002 (.mdb) and Microsoft® Excel (.xls), and location maps and photos (as JPEG images (.jpg) are on 1 CD-ROM. $20.00.

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MRD 169 – Development of a High Bandwidth Frequency Domain EM System

This project aimed to design and develop an airborne bi-resonant (dual frequency) electromagnetic (EM) transmitter-receiver system. Development of such a system would overcome some of the limitations of traditional airborne EM systems. As a result of this study, a prototype dual-frequency, frequency-domain, transmitter-receiver pair was designed, developed, and tested in an airborne survey at Sept Îles, Québec. The report file (in portable document format (.pdf) and data file (in Geosoft^® XYZ (.xyz) are on 1 CD-ROM. $20.00.

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MRD 170 – Geochemical Detection of Disseminated Palladium Mineralization in Ontario

This study collected basic information to aid in exploration for palladium deposits hosted in sulphide-poor gabbroic intrusions exhibiting complicated textures. The objectives were to identify the elemental assemblages of the primary mineralization, evaluate the mobility of the elements in the surface environment under cold climates like Canada, and to outline a new geochemical exploration technique for this type of mineralization. Mapping was carried out over mineralized zones in the Lac des Iles area of northwestern Ontario, and the East Bull–River Valley area near Sudbury. The final report (in portable document format (.pdf) is on 1 CD-ROM. $20.00.

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MRD 171 – Application of a Geodata Analysis System (GeoDAS) to Mineral Exploration in Ontario

This study assessed the potential of the newly developed GIS-based geodata analysis system (GeoDAS) for managing, visualizing, selecting and analyzing geodata to identify undiscovered mineral deposits in complex geological settings and/or with thick overburden in Ontario. Using an extensive GIS database constructed for the entire Abitibi area, a number of GeoDAS functions were tested in case studies that included modelling the spatial distribution of gold deposits in the Abitibi area; geostatistical analysis of geochemical data from the Peterlong Lake–Radisson Lake area; multifractal modelling of a geochemical anomaly in the Shining Tree area; modelling and analysis of gold and five-element deposits in the Gowganda area; and predictive mineral potential modelling of the Gowganda area. The final report (in portable document format (.pdf) is on 1 CD-ROM. $20.00.

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MRD 172 – Development of Methods and Technology for the Discovery of New Resources Around Existing Mine Infrastructure

This study identified key technology breakthroughs in three-dimensional (3-D) integration and modelling. The advanced GIS tools that were identified and applied from other domains, or that directly emerged from this study, were used to develop, test and demonstrate the “Common Earth Model” approach to near-mine exploration. Mine site data from the Kidd Creek, Eskay Creek, Perseverance, Levack and Musselwhite deposits were used to demonstrate data integration, visualization, model construction and targeting; statistically simulating metal grades; performing 3-D GIS queries across multi-property and multi-type data sets; and carrying out complex surface construction in areas of sparse data. The final report (in portable document format (.pdf) is on 1 CD-ROM. $20.00.

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MRD 173 – Geochemistry of Exhalites and Graphitic Argillites Near VMS and Gold Deposits

This project examined the geochemistry of interflow sedimentary graphitic and exhalite units near volcanogenic massive sulphide (VMS) and mesothermal gold deposits, in order to extend potential drill target areas past the silicate and carbonate alteration halo. Outcrop and drill core samples were collected from 4 study areas: the Kamiskotia VMS district; the Owl Creek–Hoyle Pond gold mine area; the Holloway–Holt-McDermott gold mine area; and a test area north of the Kidd Creek Mine. The samples were analyzed for trace element, metal and sulphur and carbon contents in order to evaluate which elements and element ratios are the most diagnostic indicators of mineralization. This information was combined with geochemical and geophysical data for the test area, to build mineral potential maps. The report file (in portable document format (.pdf), image files (in portable document format (.pdf) and CorelDRAW 9 (.cdr), and analytical data (in Microsoft^® Excel (.xls) and portable document format (.pdf) are on 1 CD-ROM. $20.00.

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MRD 174 – Drill Hole Spectral IP for Poorly Conducting Cu/PGM Mineralization in the Sudbury Basin

This project demonstrated the viability of borehole spectral induced polarization (IP) as a technique to detect non-conducting sulphide zones that have the potential to host platinum group metal mineralization, and used three-dimensional inversion modelling to estimate the distribution of the sources of chargeability anomalies in and around drill holes. Borehole IP surveys were conducted on 5 drill holes and 1 surface line in the McCreedy West area of the Sudbury Basin, and 5 drill holes in the FNX “PM Zone”. Preliminary geometric interpretations include the depth to anomalies, the off-hole persistence of anomalies, the electrical isolation or connectivity of the conductors with respect to the surface, and a rough indication of the direction to off-hole mineralization. The final report (in portable document format (.pdf), pseudosections, borehole data and IP surface data (in various Geosoft^® file formats) are on 1 CD-ROM. $20.00.

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MRD 175 – Downhole Seismic Imaging Method: A New Tool for Deep Mineral Exploration

This project developed, tested and demonstrated the use of the Downhole Seismic Imaging (DSI) technology in deep exploration beneath conductive or thick overburden. Where drill holes are present, DSI technology enables an explorationist to “see” through Paleozoic cover, and to image and assess ground laterally from a drill hole, greatly increasing the effectiveness while reducing the cost of drill-hole programs exploring under Paleozoic cover. Data was acquired to determine if down-hole seismics could help kimberlite delineation programs (the De Beers Victor kimberlite deposit in northeastern Ontario) and image known ore lenses at depth and/or detect new drill targets (Ribago property in the Rouyn-Noranda central camp). Forward modelling studies were also undertaken to simulate exploration for high-grade unconformity uranium deposits (Cameco) and help the mining process of coal (Anglo American/Coal). The final report (in portable document format (.pdf) is on 1 CD-ROM. $20.00.

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MRD 176 – Development and Demonstration of Novel Field-Portable Sample Preparation Methods for On-Site Geochemical Analysis

This study investigated new and modified concepts of sample preparation and analysis to expand the type of geochemical analysis that can be performed in the field, allowing fast turnaround, “dynamic control” of geochemical sampling, and daily modification of a survey. Results of this project demonstrate that heavy mineral separation using an air elutriation technique is feasible. The laser ablation ICP-MS would be an excellent technique for micro-probing mineral grains, cores, grab samples and concentrates. These techniques could be used in mobile geochemical laboratories for fast, efficient and clean on-site analysis. The final report (in portable document format (.pdf) is on 1 CD-ROM. $20.00.

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MRD 177 – Detectability of Mineral Deposits With Potential Field Methods

This release presents results of the second of three phases of a project designed to develop and make available accurate three-dimensional (3D) models of geophysical responses of typical orebodies in their host environment. In this phase, gravity and magnetic responses were modelled for 10 orebodies, broadly representative of 5 general exploration target types: kimberlite deposits (synthetic 1 and 2, Fox Pipe and Fort à la Corne); volcanogenic massive sulphide (VMS) deposits (Brunswick Mining and Smelting #12 and San Nicolas); copper-porphyry deposits (Spence); sedimentary-hosted exhalative (SEDEX) deposits (Gamsberg and Red Dog); and Archean gold deposits (Hemlo). This release comprises the final report (in portable document format (.pdf), and data and modelling files. The University of British Columbia Geophysical Inversion Facility’s data and 3D model viewers—gm-data-viewer and MeshTools3D, respectively—are also included. The files are on 1 DVD. $25.00.

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MRD 178 – Development and Evaluation of a 3D Vector Orientation Software Illustrated With Triaxial Gradient Magnetic Data

This project evaluated the limitations, capabilities and potential benefits to explorationists of a newly developed computer application (VectorChrome^®), which uses patent-pending methodology to colour-code the orientation of vectors, allowing better visualization of various symmetry elements within two- and three-dimensional vector fields. This study reviews 5 triaxial gradient magnetometer data sets and 1 triaxial total-field borehole survey data set and illustrates their output after processing with VectorChrome^®. This digital release comprises the final report (in portable document format (.pdf), accompanying documentation (in Microsoft^® PowerPoint (.ppt), CorelDraw v.9 (.cdr), Microsoft^® Word (.doc) and portable document format (.pdf), and VectorChrome^® 2D and 3D viewing software, associated data sets and help files. The files are on 1 CD-ROM. $20.00.

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MRD 179 – Development of a Relational Physical Rock Property Database

The Rock Property Database System (RPDS) is designed to store, manage and query physical, geochemical and geotechnical rock property data and metadata in correlation with geological description. It answers a rising need in the geosciences for a sound infrastructure to provide a better understanding of critical rock property data. The principal objectives of the current project were extension of the data model to rock property data measured on rock samples (not wireline); extension of the data model to include alteration as a geological property; definition of universal lithology and alteration classifications for geological description; entry of a large amount of data into RPDS, with a focus on data from Ontario; and implementation of a Web server to allow public query of the database over the internet. As a result of this study, there is now a publicly accessible rock property database containing over 5 million rock property data records. The final report (in portable document format (.pdf) outlining the improvements and structure of the RPDS is on 1 CD-ROM. $20.00.

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MRD 180 – Processing of Hyperspectral Data from Northern Ontario using HE/LP (Hyperspectral Exploration/Lithological Processing) Software

This project focussed on validating and improving the reliability of A.U.G. Signals Ltd.’s Hyperspectral Exploration/Lithological Processing (HE/LP) software, a system that automatically detects and classifies minerals from hyperspectral data and provides a display of confidence levels of the achieved detection and classification results. Following testing of the HE/LP technique using airborne hyperspectral data collected over several locations in the Sudbury and Timmins areas, the HE/LP algorithms were refined to enhance detection results in the abundance images. The improved algorithms were then tested using 4 additional spectral signatures extracted from the reflectance data. The final report on the project (in portable document format (.pdf) and the HE/LP software are on 1 CD-ROM. $20.00.

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MRD 181 – Detectability of Mineral Deposits With Electrical Resistivity and Induced Polarization Methods

This release presents results of the third of three phases of a project designed to develop and make available accurate three-dimensional (3D) models of geophysical responses of typical orebodies in their host environment. The first phase, reported in Miscellaneous Release–Data 134 (released in April, 2004), modelled airborne gravity gradiometry responses. The second phase, reported in Miscellaneous Release–Data 177 (see above), modelled gravity and total-field magnetic responses. This third phase extends the 3D modelling to electrical (DC/IP) methods. Resistivity and induced polarization responses were modelled for 8 orebodies, broadly representative of 5 general exploration target types: kimberlite deposits (Fort à la Corne); volcanogenic massive sulphide (VMS) deposits (Brunswick Mining and Smelting # 12 and San Nicolas); laterite deposits (Rio Tinto synthetic); sedimentary-hosted exhalative (SEDEX) deposits (Gamsberg and Red Dog); and Archean gold deposits (Hemlo and Musselwhite). The final report (in portable document format (.pdf) and files of the 3D resistivity and chargeability models (in Microsoft^® PowerPoint (.ppt) are on 1 CD-ROM. $20.00.

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MRD 182 – Mineral Exploration by Systematic Analysis of Groundwater Upwelling in Lakes and Rivers

This release presents the results of a programme of mapping of lake and river systems in northeastern Ontario, with the objective of locating groundwater upwelling sites and analyzing water and sediment samples from these sites to identify groundwaters that had passed through volumes of mineralized rock or sediment on their way to emergence sites. A total of 6 separate lake and river systems were mapped and sampled. The study areas were chosen on the basis of a combination of features that included: proximity to known mineralization; proximity to zones of high potential for the occurrence of mineralization in Archean rocks; water bodies fed by groundwater passing through glaciofluvial overburden; and areas with known cover rocks as a test for “blind” mineralization. Over 600 km of track mapping, and multi-element analyses of over 720 water samples and upwards of 300 sediment samples were carried out. The final report (in portable document format (.pdf) and analytical results (in Microsoft^® Excel (.xls) and ASCII (.txt) formats) are on 1 CD-ROM. $20.00.

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MRD 183 – Development of a New Helicopter TEM System for Mineral Exploration

The aim of this project was the design, development and field testing of a new helicopter-borne, time-domain electromagnetic (TEM) geophysical survey system (MOMENTEM^®) that would improve signal-to-noise ratios, thereby increasing the depth of EM responses, and create a fixed geometry for the system, thereby decreasing the cost and complexity of data processing. The project involved the design of a boom and support structure for the transmitter antenna and receiver sensors, along with the design and testing of a high-powered TEM transmitter. The newly developed system uses the highest electromagnetic moment to date for a helicopter platform and features 24-bit data acquisition, x, y and z B field and dB/dT sensors, new potassium vapour magnetometer and ultra-precise (± 0.1 m) GPS positioning. The final report (in portable document format (.pdf) describing the development of the new system is on 1 CD-ROM. $20.00.

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MRD 184 – Assessment of Using 3D Large-Scale Visualization and Data Integration for the Lake Nipigon Region Geoscience Initiative

This project focussed on evaluating and quantifying the benefits of using advanced 3D modelling and collaborative visualization to assist with the development of a regional bedrock map. MIRARCO worked with staff of the Ontario Geological Survey (OGS) who were carrying out bedrock mapping of the western embayment of Lake Nipigon under the Lake Nipigon Region Geoscience Initiative. The principles of “common earth modelling” were applied and the models generated were reviewed using “collaborative immersive virtual reality” (CIVR) visualization. It was anticipated that the common earth modelling and CIVR visualization would decrease the time taken to generate regional geological maps; increase the quality of the resulting map by decreasing areas of uncertainty or misinterpretation; improve how the resulting map and scientific information is communicated to the target market; and help answer some geoscience questions related to the formation of the geological structures. The final report (in portable document format (.pdf) is on 1 CD-ROM. $20.00.

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MRD 185 – A New Aircraft Compensation System for Magnetic Terrains

This project examined the fundamentals of Leliak’s system of equations, the standard for aeromagnetic compensation using multiple strapdown sensors, to gain understanding into aeromagnetic compensation. Software was developed using Leliak’s system of equations and several different numerical solvers were tested using data supplied by the Ontario Geological Survey (OGS), test data from Pico Envirotec, and data collected for the project. Different high-pass filters were tested in compensation routines and various multi-block models of aircraft were simulated on the EMIGMA simulation platform of PetRos EiKon using combinations of induced and permanent magnetic characteristics as well as conductive portions of the model. Test flights using GPS sensors were conducted to gather data for compensation testing and to determine if aircraft orientations obtained by GPS are accurate enough for compensation. This release contains the final report (in portable document format (.pdf), the raw data collected during the project and the data contributed by the OGS. Geophysical data are in the form of Geosoft^® ASCII XYZ files, GPS data are in the raw form as collected by Waypoint Consulting’s logging software. Relative attitude processing results are in the form of ASCII files. The files are on 1 CD-ROM. $20.00.

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MRD 186 – Integrated GIS Compilation of Geospatial Data from the Abitibi Greenstone Belt, Northeastern Ontario: Discover Abitibi Initiative

The Discover Abitibi GIS compilation project was designed to provide the general user with a fairly complete library of the work that has been done in the Abitibi greenstone belt, Ontario, Canada, in one single transportable package. The compilation is a synthesis of over 75 individual data releases from the Ontario Geological Survey library of Miscellaneous Release—Data (MRD), Open File Reports (OFR), Geophysical Data Sets (GDS), Preliminary Maps (P.Map) and Maps. Nine distinct groups of geological data comprise the compilation: Maps and Datasets, containing geospatial data used to create maps for the Greenstone Architecture Project; Quaternary Geology, containing till data from the Timmins, Matachewan, Peterlong Lake, BRiM and KLIP programs; Drillhole, containing diamond drill, wedged, underground, reverse circulation, percussion and overburden hole data; Bedrock Geology, containing rock type, structural observation and geochemistry data; Base Map; Mineral Deposits, containing information on resources, alteration and mine status; Geophysics, containing gamma ray, Keating magnetic, MIDAS magnetics, electromagnetics and MEGATEM^® geophysical data sets; BRiM and KLIP, containing new maps produced with the BRiM and KLIP data sets; and 2005 Drill Core Library, containing a newly created, searchable dataset based on data from donated diamond drill hole logs from the Kirkland Lake and Timmins offices. The compilation was produced as an ArcGIS^® ArcInfo^® 9.x project file (.mxd), which can be read using ArcView^®, ArcExplorer™ and ArcInfo^® 9.x. The compilation is also available as an ArcGIS 8.3^® project file or as an ArcReader^® 9.1 file. The two ArcGIS^® project files require the commercial license of ArcGIS^®, whereas the ArcReader^® file can be opened using the freely available ArcReader^® software package from ESRI^®. Available on 1 DVD as a 3 GB compressed file, which when copied to a local hard drive and uncompressed, will require a total space of 11 GB. $25.00.

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MRD 187 – GIS Compilation of Geology and Tectonostratigraphic Assemblages, Wabigoon–Winnipeg River–Marmion Transect, Western Superior Province, Ontario

This GIS compilation of the geology and tectonostratigraphic assemblages of the Wabigoon–Winnipeg River–Marmion transect is an outcome of the western Superior NATMAP project. It synthesizes, with existing reconnaissance and detailed sources, mapping, geochronological and geochemical information acquired during the NATMAP project across a transect formerly considered the Wabigoon Subprovince and now recognized to comprise the Wabigoon and Winnipeg River terranes and the Marmion domain. Included on this CD-ROM are unpublished structural data sets with more than 14 000 data points; Mineral Deposit Inventory (MDI) data and drill hole data from Ontario Ministry of Northern Development and Mines databases; photo gallery illustrating lithological assemblages and/or structural features at type localities, as well as almost 2000 lithogeochemical analyses of which many are unpublished. Radiometric, magnetic and gravity data have been provided by the Geological Survey of Canada. Data document files are available in .doc, and .pdf formats. Available on 1 CD ROM. $20.00.

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MRD 188 – Lake Sediment and Water Geochemical Data for the Central Swayze Area, Northeastern Ontario

Geochemical and water quality (limnological) data, including quality control data, from lake sediment and water samples collected from 1398 sites in the Central Swayze are being released in conjunction with Open File Report 6173. Data are available in Microsoft^® Excel (.xls) and comma-delimited (.csv) file format on 1 CD-ROM. $20.00.

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MRD 189 – Logistics and Interpretative Report, Physical Property Borehole Logging: Lake Nipigon Region Geoscience Initiative

This release contains the report and data files for borehole logging of 4 diamond-drill holes located on the Wolf Mountain–Seagull property in northwestern Ontario. The data collected in this borehole survey provide physical rock property information on the lithologies sampled, which can be used to constrain two-dimensional (2D) and three-dimensional (3D) geophysical models for the area. The drill-hole locations and other drill-hole information are found in the Survey section of the report. The databases require the user to have access to VIEWLOG software (for further information, see VIEWLOG Systems: www.viewlog.com). This release comprises the report file (portable document format (.pdf); and the data files in Microsoft^® Excel (.xls) and Access (.mdb), Statistical Package for Social Sciences (SPSS data (.sav) and output (.spo), hypertext mark-up language (.htm) and bitmap image (.bmp) formats), and associated VIEWLOG files (log ASCII (.las); Windows^® enhanced metafile format (.emf) and VIEWLOG (.db, .hdr, .lsm and .xpt) formats). Available on 1 CD-ROM. $20.00.

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MRD 190 – Stratigraphic, Geochemical and Isotopic Data from Lakehead University Researchers: Lake Nipigon Region Geoscience Initiative

This release comprises the data from tables and/or appendixes in Open File Report (OFR) 6174 (Stratigraphy and Sedimentology of the Mesoproterozoic Sibley Group and Related Igneous Intrusions, Northwestern Ontario: Lake Nipigon Region Geoscience Initiative), OFR 6175 (Geochemistry and Radiogenic Isotope Characteristics of the Sills of the Nipigon Embayment: Lake Nipigon Region Geoscience Initiative), which were released on December 13, 2005, and OFR 6176 (Sulphide Saturation Mechanisms in Gabbroic Intrusions in the Nipigon Embayment: Lake Nipigon Region Geoscience Initiative), which was released on January 9, 2006. In addition, magnetic susceptibility data have been provided for diamond-drill core examined for OFR 6175. The data files are in Microsoft^® Excel (.xls) format. Available on 1 CD-ROM. $20.00

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MRD 191 – Preliminary U/Pb Geochronology Results: Lake Nipigon Region Geoscience Initiative

This digital data release, produced as part of the Lake Nipigon Region Geoscience Initiative (LNRGI), contains preliminary U/Pb age results from baddeleyite and/or zircon for 44 rock samples collected between 2003 and 2005. In addition to location information, descriptions of the dated minerals and concordia plots illustrating the U/Pb data are included in the report. Samples are mainly from Mesoproterozoic Nipigon diabase sills and Nipigon ultramafic intrusions; however, ages from Archean mafic intrusions, Paleoproterozoic and Mesoproterozoic sedimentary and volcanic rocks are also reported. Location information is given in the Universal Transverse Mercator (UTM) projection and grid system, Zone 16, North American Datum 1983. This information is presented in a portable document format (.pdf) file on 1 CD-ROM. $20.00.

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MRD 192 – Preliminary Results of the Audiomagnetotelluric Study of the Nipigon Embayment: Lake Nipigon Region Geoscience Initiative

This digital data release, produced as part of the Lake Nipigon Region Geoscience Initiative (LNRGI), presents preliminary results from the largest audiomagnetotelluric (AMT) survey conducted in Ontario. The survey was successful in imaging the contact between overlying Sibley Group sedimentary rocks and underlying Archean basement, as well as imaging individual Nipigon mafic sills. The report provides a brief overview of survey methodology and the rock property characteristics that allow for resolution of specific rock units. Preliminary contoured sections of the AMT one-dimensional models along 5, mainly east to west, survey lines are provided in 2 portable document format (.pdf) files, one of which is adapted from a Microsoft^® PowerPoint presentation presented at the December 2005 Ontario Exploration and Geoscience Symposium. In addition, a preliminary three-dimensional (3D) interpretation of an area is presented as an audiovisual format (.avi) file. This information is presented on 1 CD ROM. $20.00.

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MRD 193 – Magnetic and Gravity Three-Dimensional (3D) Modelling: Lake Nipigon Region Geoscience Initiative

This digital data release was produced as part of the Lake Nipigon Region Geoscience Initiative and comprises a report (in portable document format) and all digital products of three-dimensional (3D) inversion modelling carried out as part of this program. The contents of this release consist of data, images and reporting for 15 gravity areas and 23 magnetic areas in a region flanking the west shore of Lake Nipigon. The 2 methods used to select study areas (essentially regional and residual, larger and smaller) have resulted in overlapping models with differences in resolution. Images are supplied as bitmap (.bmp) files (accessible through Microsoft^® Windows^®-based viewing systems), which show the geology and many views of the 3D inversion of the magnetic and gravity data for each area. Binary (.bin) files are included for viewing using a three-dimensional viewer. Software (WinDisp 3Dviewer version 3.00) for viewing the products of the 3D inversions and instructions for its use are included with this release (with permission of Scientific Computing and Applications, Adelaide, Australia, http://www.scicomap.com). Digital files (e.g., .sus and .den), which are the products of the University of British Columbia Geophysical Inversion Facility (UBC–GIF) magnetic and gravity inversion programs, are presented for use in other imaging systems or software. A detailed description of the contents of the disk is found in a readme file. All data are presented in Universal Transverse Mercator (UTM) Zone 16 using North American Datum 1983 (NAD83). The report, data and user documentation are available on 1 DVD. $25.00.

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MRD 194 – Multidisciplinary Study of North- to North-northeast-trending dikes in the Region West of the Nipigon Embayment: Lake Nipigon Region Geoscience Initiative

This digital data release, produced as part of the Lake Nipigon Region Geoscience Initiative (LNRGI), presents preliminary paleomagnetic, geochemical and U/Pb geochronological results from north- to north-northeast-trending diabase dikes located west of Lake Nipigon. This study was undertaken to determine if these dikes were related to Nipigon diabase sill emplacement in the Nipigon area. No dikes were found that could be directly linked to Nipigon sill emplacement. Most dikes in the study area are related to the Paleoproterozoic Marathon and Molson dike swarms, however, the Mine Centre and Empey Lake dikes may be related to the circa 1140 Ma Great Abitibi dike and, thus, may represent precursors to the formation of the Midcontinent Rift. This information is presented in a portable document format (.pdf) file, with Appendix 1 data available as a Microsoft® Excel (.xls) spreadsheet, on 1 CD-ROM. $20.00.

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MRD 195 – Regional GIS Database for the Lake Nipigon Area, Lake Nipigon Region Geoscience Initiative

The GIS compilation project of the Lake Nipigon Region Geoscience Initiative (LNRGI) was prepared to provide prospectors, mining companies and professionals with an extensive collection of proprietary and public geoscientific data sets containing simplified topographic bases, geological maps, diamond-drill hole databases, geophysical data sets, satellite images, an updated mineral deposit inventory, as well as digital versions of the geological and geophysical maps produced during the course of the LNRGI. GIS layers are organized in different digital maps displaying the provincial drillhole database (ERLIS Data Set 13); Lac des Iles Mine drilling database; proprietary and public geophysical surveys; data releases and preliminary maps from the Ontario Geological Survey (OGS) produced during the program; subsets of several previous OGS data releases in the region; and scanned geological maps. All data sets in this compilation are available as ArcView^® shape (.shp) and layer (.lyr) files, ArcReader® (.pmf) map files, MapInfo^® (.tab) and MapInfo^® workspace (.wor) files. Additional support documents and databases are also included: diamond-drill logs (PDF or Microsoft^® Excel (.xls) files), drill core library database (Microsoft^® Access 2000 (.mdb) files), photographs of drill core and outcrops (.jpg and .tif), geophysical maps (.tif, .jpg, .ecw files), scanned maps and satellite images (.ecw files), and ArcCatalog^® metadata (.xml) files. Extensive documentation in HTML format provides users with an interface to easily access the compiled digital maps. Users with limited access to software and hardware, or limited knowledge and experience with GIS can access the compiled map (.pmf) and workspace (.wor) files using the free downloadable viewers, ArcReader^® and MapInfo^® ProViewer^TM, available respectively from ESRI (http://www.esri.com) and MapInfo Corporation (http://www.mapinfo.com). Experienced users can access the data files, compiled maps and workspaces using either ArcGIS^® (ArcView^®) 8.0 (or newer) or MapInfo Professional^® 7.5 (or newer). Available on 2 DVDs totalling 5.5 GB of disk space. $50.00.

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MRD 196 – Reprocessing and Interpretation of Abitibi–Grenville Line 12 for the Discover Abitibi Seismic Program: Discover Abitibi Initiative

Data collected on a single two-dimensional (2D) seismic line acquired in 1987 as part of the Lithoprobe Kapuskasing Transect (later incorporated into the Lithoprobe Abitibi–Grenville Transect) have been reprocessed as part of the Discover Abitibi, Timmins–Kirkland Lake area seismic program. The products on this release include 1) final migrated data in SEGY (Society of Exploration Geophysicists standard) format; 2) xyz locations, and Geosoft^® PLT and TIFF files of the line survey and the CDP (Common Depth Point) trace; 3) JPEG, TIFF and CorelDRAW (.cdr) images of the line 12 migrated seismic section and its interpretation, as well as a CGM (Computer Graphic Metafile) file of the migrated section, shading the positive and/or negative parts of the wiggle traces in the section; and 4) report documentation in portable document format (PDF). Available on 1 CD-ROM. $20.00.

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MRD 197 – Geological, Geochemical and Geophysical Data from the Porter and Vernon Townships Area, Southern Province, Ontario

This release contains field photographs, whole-rock chemistry, assay, magnetic susceptibility and scintillometer data collected as part of the Porter and Vernon township mapping project, which were collected between June 2004 and December 2005. Also included are copies of the Summary of Field Work articles for the project from 2004 and 2005, as well as the marginal notes for Preliminary Map P.2845. This release consists of 298 photographs (.jpg files), 4 tables (Microsoft^® Excel (.xls) files), and 8 documents in portable document format (.pdf). The files are on 1 CD-ROM. $20.00.

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MRD 198 – Results of 2004 Oro Moraine Drilling Program in the Barrie Area, Central Ontario

This release consists of data resulting from the 2004 Oro Moraine drilling program in the Barrie area of central Ontario. A total of 14 holes were drilled, logged and sampled. Downhole geophysics was done on 11 of the holes. The data consist of written logs, which include unit descriptions with sample locations and representative photographs; and graphic logs, which include lithology, grain sizes, select carbonate results and downhole geophysics. A map of drilling locations and the results of particle size analysis and chittick analysis are also included in this release. The data are available as hyperlinked documents (.html) and as independent picture files (.jpg and .tiff), Microsoft^® Word documents (.doc) and Microsoft^® Excel files (.xls) on one CD-ROM. $20.00.

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MRD 199 – Modern Alluvium and Till Data Release, Tweed Area, Southeastern Ontario

This release consists of data related to kimberlite indicator minerals (KIMs), metamorphic/magmatic massive sulphide indicator minerals (MMSIM^®) and gold grains recovered from 250 samples collected over an area covering approximately 4700 km² in the Tweed area, southeastern Ontario. The data are being released in conjunction with Open File Report 6178. Files on this release contain information on abbreviations used; sample site locations; KIM counts; mineral chemistry for KIMs (e.g., garnets, chromites, Mg-ilmenites, olivines and pyroxenes); MMSIMs picked; mineral chemistry for MMSIMs, gahnite; and gold grains. Data are available in Microsoft^® Excel (.xls) file format on 1 CD-ROM. $20.00.

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MRD 200 – Soil Geochemical Data (Aqua Regia, Mobile Metal Ions and Enzyme LeachSM) from 8 Transects in the Timmins Area: Discover Abitibi Initiative

This digital data release contains aqua regia (UT-1), Mobile Metal Ions (MMI-M) and Enhanced Enzyme Leach^SM (EEL) analytical data for sample localities from 8 transects in the Timmins area described in Open File Report (OFR) 6179. Other information provided includes sampling site locations, sample descriptions and sampling protocols. Samples were analyzed using 3 separate analytical protocols including 2 proprietary extractions (Mobile Metal Ions and Enzyme Leach^SM) and one strong partial digestion (aqua regia). Results are described for each transect, and based on the magnitude and number of samples defining the observed Au anomalies, the transects are ranked for exploration follow-up. OFR 6179 is available in portable document format (.pdf). The data are available in Microsoft^® Excel (.xls) file format on 1 CD-ROM. $20.00.

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MRD 201 – Lake Sediment and Water Geochemical Data from the Kakagi Lake Area, Northwestern Ontario

Lake sediment and water geochemical data and lake water quality (limnological) data, including quality control data, collected from a survey of 1442 sites in the Kakagi Lake area are being released in conjunction with Open File Report 6188. Data are available in Microsoft^® Excel (.xls) file format on 1 CD-ROM. $20.00.

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MRD 202 – Geophysical Data Acquired for Geoscientific Profiles in the Timmins–Kirkland Lake Area: Discover Abitibi Initiative

This release contains the measured and processed geophysical data acquired for the geoscientific profiles described in Open File Report (OFR) 6189. Ground geophysical data for 3 parallel profiles, most of which are 2 km in length and spaced 200 m apart, were acquired at 15 different sites chosen for their proximity to known mineral deposits of various types. The data acquired include magnetic, gravity and pole–dipole induced polarization. In addition, an Insight Section was acquired on 1 profile at each site, usually the central profile, using a modified gradient induced polarization array. All standard reductions and corrections were applied to the data. The chargeability and resistivity data from both the Insight Sections and pole–dipole surveys were inverted using the University of British Columbia Geophysical Inversion Facility (UBC–GIF) DCIP2D inversion program. In addition, 5 regional maps, available in portable document format (.pdf), show the regional setting of the geoscientific profiles under the following themes: bedrock geology, total magnetic intensity, Bouguer gravity, electromagnetic field apparent conductance and digital elevation model. OFR 6189, including the 15 back-pocket plots, is also provided in portable document format (.pdf). The measured and processed data are available in ASCII and Geosoft^® formats on 1 CD-ROM. $20.00.

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MRD 203 – GIS Compilation of Geology and Tectonostratigraphic Assemblages, Western Uchi Subprovince, Western Superior Province, Ontario and Manitoba

This GIS compilation of the geology and tectonostratigraphic assemblages of the western half of the Uchi Subprovince is an outcome of the western Superior NATMAP project. It synthesizes, with existing reconnaissance and detailed sources, the mapping, geochemical, geochronological, structural, mineral deposit, geophysical and hydrographic information acquired during a federal–provincial partnership involving the Manitoba Geological Survey, the Ontario Geological Survey and the Geological Survey of Canada. Data from published maps of the west Uchi (MGS OF2003-1 and GSC OF1522) and east Uchi (GSC OF4256 and OGS P.3460) areas are included in this release, as well as unpublished structural datasets (4000 data points); mineral deposit data from Red Lake map GSC OF4594; photo gallery illustrating lithological assemblages and/or structural features at type localities; and almost 2000 lithogeochemical analyses, of which many are unpublished. Digital data are provided as ESRI^® ArcMap™ .mxd and .shp files, ESRI^® ArcView^® .apr and ESRI^® ArcExplorer™ .aep files; images, as .pdf, .tif and .jpg files; and documentation as .pdf and Microsoft^® Word .doc files. ESRI^® ArcExplorer™ free data-browsing software is also included. Available on 1 CD-ROM. $20.00.

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MRD 204 – An Updated Guide to the Subsurface Paleozoic Stratigraphy of Southern Ontario

This release consists of a digital (PDF) version of the text of Open File Report 6191, plus appendices and large format figures that were not included in the OFR hard copy. This MRD and OFR represent the final products of a project designed to produce an updated version of a 1967 publication of the same name, incorporating new subsurface data and using modern subsurface mapping techniques and interpretative models. Additionally, this study incorporates reference outcrops and reference cores and their correlation with geological observations and interpretations from petroleum well drill cuttings and geophysical logs. This project was completed as part of the Southern Ontario Hydrocarbon Resource Evaluation and Stratigraphic Synthesis Project using funding provided by Natural Resources Canada under the Targeted Geoscience Initiative 2 program. These data are to be used in conjunction with Open File Report 6191. Data in this release are available in PDF, JPEG, TIFF and Microsoft^® Excel 7.0 (.xls) file formats on 1 DVD. $25.00.

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MRD 205 – Results of 2003–2004 Overburden Drilling Programs in the Region of Waterloo, Southwestern, Ontario

This release consists of data resulting from overburden drilling programs conducted within the Regional Municipality of Waterloo, southwestern Ontario in 2003 and 2004. A total of 13 PQ (8–9 cm diameter) continuous cores were collected: 9 using a Christensen mud rotary drill (in 2003); and 4 using a rotosonic drill (in 2004). Core was logged and sampled. Geophysical surveys were conducted on 12 of the 13 boreholes and the results reported in this release. The data are available in 2 basic formats. Written logs, saved as Microsoft® Word (.doc) and ASCII (.txt) documents, contain detailed descriptions, including colour, texture, compaction, sedimentary structures, stone content, etc., of the recovered sediments as well as depth of samples collected. A map of drilling locations and the analytical data (grain size, carbonate and geophysical measurements), stored in both Microsoft^® Excel (.xls) and ASCII (.txt) formats, are also available. The data are available as hyperlinked documents (.html) and as independent picture files (.jpg and .tif) in addition to the formats above, on 1 CD-ROM. $20.00.

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MRD 206 – Lake Sediment and Water Analytical Data for the Upper Manitou Lake Area, Northwestern, Ontario

Lake sediment geochemical and lake water quality (limnological) data, including quality control data, collected from a survey of 1087 sites in the Upper Manitou Lake area, are being released in conjunction with Open File Report 6194. Data are available as Microsoft^® Excel (.xls) files on 1 CD-ROM. $20.00.

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MRD 207 – Bedrock Topography and Overburden Thickness Mapping, Southern Ontario

This release contains bedrock topography and overburden thickness maps for southern Ontario in ESRI^® ArcGIS^® (Grid) format. The bedrock topography (elevation) map was created from point data from a variety of sources including water well records, geotechnical borehole records, oil and gas well records, existing geologic maps and field observations. These core data sets are also available in ASCII text format for non-ESRI^® users. This release contains files for Google^TM Earth users as well as a stand-alone bedrock cross-section viewer. To use Google^TM Earth or the cross-section viewer, at least 128 MB of RAM is required (256 MB or higher recommended). This release also includes a report (.pdf) format outlining the protocols and methodology developed by the Ontario Geological Survey (OGS) to generate regional bedrock elevation and overburden thickness maps for southern Ontario. Details of the data sets are provided in a readme (.pdf) file and a metadata (.pdf) file. Available on 1 CD-ROM. $20.00.

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MRD 208 – Digital GIS Compilation: Bedrock Geology of Powell, Bannockburn and Montrose Townships

This digital release provides a compilation of chemical, mineralogical, magnetic susceptibility and field data for Powell, Bannockburn and Montrose townships, previously published as Preliminary Maps P.3577 and P.3576. Data are included as Microsoft^® Excel (.xls) files, raster files (.jpg), portable document format (.pdf) files for legend files, and in both geodatabase and shapefile formats (with photos and geochemical plots as hyperlinked (.jpg) files) prepared with ESRI^® ArcGIS^® 9.1software. Details of the GIS data sets are provided in a readme (.pdf) and metadata (.pdf) file. Available on 1 CD-ROM. $20.00.

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MRD 209 – Lithogeochemical Data for Intermediate to Felsic Intrusive Rocks Sampled in 2005

This digital release contains location and whole rock geochemical data for 176 samples of intermediate to felsic intrusive rocks collected in the fall of 2005. The samples were acquired in the Abitibi (131samples) and Red Lake (45 samples) greenstone belt areas. This sampling project has been carried out under an Ontario Geological Survey–GoldCorp Inc. collaborative project agreement. These results constitute a part of a long-term Ontario Geological Survey project (“Characteristics of Mineralized and Unmineralized Intermediate to Felsic Plutonic Systems”). Discussion and interpretation will be presented in future reports, and the data are released here as a Microsoft^® Excel (.xls) file without interpretation. Available on 1 CD-ROM. $20.00.

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MRD 210 – Electron Microprobe and Bulk Rock and Mineral Compositions of Barren and Fertile Peraluminous Granitic Rocks and Rare-Element Pegmatites, North-Central and Northeastern Superior Province of Ontario

This digital release contains all compositional data produced by a 2002 regional investigation of rare-element pegmatites and proximal barren and fertile granitic rocks in parts of the Wabigoon, Quetico and Opatica subprovinces. The data set comprises 9781 electron microprobe, 196 bulk rock and 98 bulk mineral compositions. In addition, colour versions of 56 photographs and 32 figures from OFR 6195, Fertile Peraluminous Granites and Related Rare-Element Mineralization in Pegmatites, North-Central and Northeastern Ontario, are provided as tagged image format (.tif) files. Location information, tables and probe data are presented as Microsoft^® Excel (.xls) spreadsheets (49 files). There is also a Microsoft^® Access (.mdb) file of microprobe analyses. Location data are provided in the Universal Transverse Mercator (UTM) projection and grid system, Zones 16 and 17, North American Datum 1983 (NAD 83). Available on 1 CD-ROM. $20.00.

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MRD 211 – Lithogeochemical Data Compilation for the Shaw Dome Area: Shaw, Adams, Eldorado, Carman, Langmuir, Deloro and Price Townships

This data release contains both new geochemical data and data compiled from a variety of sources for the volcanic and intrusive rocks of the Shaw Dome area. The data set contains 741 whole rock geochemical analyses and selected trace elements from surface and core samples. Most of the lithogeochemical data consist of X-ray fluorescence spectrometry (XRF) on fused glass disk for major elements and XRF spectrometry of pressed powders or atomic absorption spectrometry (AA) for minor elements. When available, trace elements were determined by a combination of XRF spectrometry of pressed powders and inductively coupled plasma mass spectrometry (ICP–MS). The positional data for both new and previous geochemical analyses are provided in UTM coordinates (Zone 17, North American Datum 1983). Available on 1 CD-ROM. $20.00.

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MRD 212 – Geological, Geochemical and Geophysical Data from the Baldwin Township Mapping Project, Southern Province, Ontario

This release contains field photographs, whole-rock chemistry, assay, magnetic susceptibility and scintillometer data collected as part of the Baldwin Township mapping project, which were collected between June and December 2006. Also included are a copy of the 2006 Summary of Field Work article for the project, as well as the marginal notes for Preliminary Map P.3584. This release consists of 150 photographs (.jpg files), 3 tables (Microsoft^® Excel 2003 (.xls) files) and 6 documents in portable document format (.pdf). The files are available on 1 CD-ROM. $20.00.

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MRD 213 – Geological, Geochemical and Geophysical Data from Western Grimsthorpe Domain, Grenville Province, Ontario

This data release contains field photographs, whole-rock chemistry, assay, magnetic susceptibility and scintillometer data collected as part of the western Grimsthorpe domain mapping project, which was conducted between June 2004 and December 2006. Also included are copies of articles for the project published in Summary of Field Work and Other Activities from 2004 to 2006, presentations on this project area, as well as the marginal notes and legend for Preliminary Map P.3600, Precambrian Geology of the Western Grimsthorpe Domain, Grenville Province. This release consists of 161 photographs (.jpg files), Microsoft^® Excel^® 2003 (.xls) spreadsheets (6 files) and 15 documents (including articles and presentations) in portable document format (.pdf). Location data are provided in the Universal Transverse Mercator (UTM) projection and grid system, Zone 18, North American Datum 1983 (NAD83). The files are available on 1 CD. $20.00.

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MRD 214 – GIS Compilation of the Cobalt–Temagami Area, Abitibi Greenstone Belt, 2007

This digital release contains geodatabase and shapefile data in ESRI^® ArcGIS^® 9.1 format for the 1:100 000 scale geological compilation map of the Cobalt–Temagami area, Abitibi greenstone belt. Also included are shapefiles that are compatible with ArcGIS^® 8.3. Geochronological and geochemical data for the area are provided as Microsoft^® Excel files. Discussion and interpretation of the geochronological data will be presented in a subsequent report. Various geophysical images of the area are included as ArcView^® format TIFF images. Rasters of detailed geological maps used in the compilation of this map are also included on this digital release. Compilation of this map took place during 2006–2007, accompanied by field work, and geochronological and geochemical sampling. This geological compilation of the Cobalt–Temagami area is the 6th of a series of 1:100 000 maps and GIS data sets of the Abitibi Subprovince in Ontario. Available on 1 CD-ROM. $20.00.

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MRD 215 – Till Compositional Database – Investigation of the Overburden Signature of the Engagement Zone, a Diamond-Bearing, Lamprophyric, Heterolithic Breccia, Wawa, Ontario

This release presents the results of a study undertaken to determine if till sampling and analysis could be used for the exploration of diamond-bearing Archean rocks in the Wawa area. The area selected for study was the West Timmins Mining Inc. (BandOre Resources Ltd.) Engagement zone occurrence. Analytical results of heavy mineral concentrate, mid-density concentrates and till matrix geochemistry (ICP-MS and ICP-OES) of the till samples are provided as spreadsheet files (.xls or .csv formats) and as GIS files (.shp format). This digital data release complements Open File Report 6197, which is being released at the same time (see above). Available on 1 CD–ROM. $20.00.

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MRD 216 – Geology of the Canadian Shield in Ontario: An Update

This release contains geological, geochronological, aeromagnetic, gravity and earthquake location data, as well as the location information for drill hole and geochemical data for the province of Ontario compiled from federal and provincial databases. The release also includes ArcExplorer^® project (.aep) files for viewing with ArcExplorer^® freeware, which is included with the release. These data are a joint release between the Ontario Geological Survey, the Geological Survey of Canada (released as Open File 5511), and Ontario Power Generation (OPG 06819-REP-01200-10158-R00). The data complement a hard copy report—Ontario Geological Survey, Open File Report 6196—which summarizes the advances made in our understanding of the geology of the Precambrian Shield in Ontario since 1992. A portable document format (.pdf) version of this report is included in this release. The files are on one CD-ROM. $20.00.

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MRD 217 – Geochemical Data from the Hoyle Pond Mine, Timmins, Ontario

This digital data release comprises the results of major oxide and trace element geochemical analyses for 356 samples collected between December 2002 and August 2006 at the Hoyle Pond Mine. The results of the analyses are contained on 28 worksheets in a single Microsoft^® Excel^® 2003 (.xls) file. Supplementary information included with the geochemical data comprise sample number; sample type; sample location (geographic, as well as location within the mine); and rock unit. The data are on 1 CD. $20.00.

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MRD 218 – Lake Sediment and Water Geochemical Data from the Red Lake Area, Northwestern Ontario

Lake sediment and water geochemical data and lake water quality (limnological) data, including quality control data, collected from a survey of 1157 sites in the Red Lake area are being released in conjunction with Open File Report 6198. Data are available in Microsoft^® Excel (.xls) file format on one CD-ROM. $20.00.

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MRD 219 – Paleozoic Geology of Southern Ontario

The Ontario Geological Survey (OGS) has generated an attributed GIS-based, seamless map of the Paleozoic geology of southern Ontario, based primarily on 1:50 000 scale maps produced over the past 33 years. Paleozoic geology map data are provided as ESRI^® ArcInfo^® coverages in geographic co-ordinate system NAD83, decimal degrees. The map data set consists of 5 coverages capturing information on Paleozoic geological units; linear features, such as faults and contacts; point features, such as quarry, drill hole and outcrop locations; as well as an index containing references to all published OGS Paleozoic maps. Also included is a point coverage hyperlinked to photos depicting key sections of each of the Paleozoic rock formations found across southern Ontario. Other information provided includes a user document and readme file which explain the GIS process, coverages and metadata, as well as a “Getting Started” section. Data are available in ArcGIS^® with a completed project file (.mxd). The data are available on one CD-ROM. $20.00.

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MRD 220 – Modern Alluvium Data Release, Gogama–Shining Tree Area, Northeastern Ontario

This data release, released in conjunction with Open File Report 6227, consists of data resulting from heavy mineral processing of 335 modern alluvium and 8 till samples collected over an area of 6500 km2 in the Gogama–Shining Tree area, northeastern Ontario, as part of a regional modern alluvium sampling survey conducted between June and August 2005. The primary objective of this survey was to determine the presence of kimberlite indicator minerals (KIMs), metamorphic/magmatic massive sulphide indicator minerals (MMSIMs^®) and gold grains. Included on this release are sample site locations; sample tabling data; KIM counts and remarks; microprobe, gold grain and table concentrates data; MMSIM^® picking results and remarks, and pebble lithology counts. Available as 11 Microsoft^® Excel^® 2003 (.xls) files on 1 CD. $20.00.

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MRD 221 – Geological, Geochemical and Geochronological Data from the Fry Lake Area, Superior Province, Ontario

Field photographs, whole-rock chemistry, and field data collected in the Fry Lake area between June and December 2006 as part of the Far North Geological Mapping Initiative are being released in conjunction with Open File Report 6208 and maps P.3587 and P.3588, digital versions of which are provided in portable document format (.pdf) on this release. This release also consists of 1023 photographs as .jpg files, 9 Microsoft^® Excel^® 2003 (.xls) spreadsheets, and 1 .pdf file of a Summary of Field Work and Other Activities 2007 article that describes the results of geochronological analyses of samples collected from the Fry Lake area. The files are on 1 DVD. $25.00.

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MRD 222 – Geological, Geochemical and Geochronological Data from the McInnes Lake Greenstone Belt, the Frame Lake Pluton and the Supracrustal Remnants Study Area, Berens River Subprovince, Ontario

This release contains whole-rock, trace element and rare earth element geochemical data, along with field photographs and photograph descriptions, for 2 projects, covering 3 study areas, conducted in 2006 as part of the Far North Geological Mapping Initiative. This release consists of geochemical data (1 Microsoft^® Excel^® 2003 (.xls) spreadsheet) and 353 digital photographs (.jpg files) with descriptions (3 documents in portable document format (.pdf). These data augment, and are being released in conjunction with, Open File Report 6210 and maps P.3589 to P.3592, digital versions of which are provided in portable document format (5 .pdf files). A geological compilation for the 3 study areas (Figure 2, at 1:100 000 scale), which accompanies OFR 6210, is also provided (1 .pdf file). In addition, the results of geochronological analyses of samples collected from the McInnes Lake greenstone belt and from the supracrustal remnants study areas, published in Summary of Field Work and Other Activities 2007, are provided (1 .pdf file). The data are available on 1 DVD-ROM. $25.00.

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MRD 223 – Geochemical Data from the East Bull Lake and Agnew Intrusions, and the Whiskey Lake and Ompa Lake Greenstone Belts, Districts of Algoma and Sudbury

This release contains whole-rock geochemistry and assay data collected as part of the Elliot Lake Geoscience Initiative from the Whiskey Lake and Ompa Lake greenstone belts and the East Bull Lake intrusion. Data included in this release was previously released on CD accompanying Open File Reports 5837, 5849, 5902 and 5923. The raw data from these CD's are in Lotus (.wk1 or .wk3) or ASCII (.txt) format. In addition, for this release, the data has been translated into Microsoft^® Excel^® 2003 (.xls) files, which have been edited for consistency. Sample location information in all the files is given in UTM zone 17 co-ordinates, NAD27 datum. The files are on 1 CD-ROM. $20.00.

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MRD 224 – Geochemical Data from Carbonate Rocks from the Central Metasedimentary Belt, Grenville Province, Ontario

This release contains whole-rock and trace element geochemistry data collected from carbonate rocks located in the Central Metasedimentary Belt of the Grenville Province. Data for 1913 samples originally appeared in hard-copy form in Mineral Deposits Circular 28 and in digital form in Open File Report 5960. Data for an additional 77 samples found within the Ontario Geological Survey PETROCH database, as well as from 152 samples collected by R.M. Easton between 1983 and 2000 are also included. The raw data from Open File Report 5960 are in database (.dbf) or ASCII (.txt) format, but for this release, these data have also been translated into Microsoft^® Excel^® 2003 (.xls) files, which have been edited for consistency. Sample location information in all the files is given in UTM zone 17 or 18 co-ordinates, NAD27 datum. The files are on 1 CD-ROM. $20.00.

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MRD 225 – Lake Sediment and Water Geochemical Data from the North Swayze Area, Northeastern Ontario

Lake sediment and water geochemical data and lake water quality (limnological) data, including quality control data, collected from a survey of 750 sites in the North Swayze greenstone belt are being released in conjunction with Open File Report 6214. Data are available as Microsoft^® Excel^® 2003 (.xls) format files on 1 CD. $20.00.

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MRD 226 – GIS Compilation: Bedrock Geology of Prosser Township

This digital release provides a compilation of field, drill hole, chemical and mineralogical data for Prosser Township, previously published as Preliminary Map P.3593. Data are included as Microsoft^® Excel (.xls) files, raster files (.jpg), portable document format (.pdf) for legend files, and in both geodatabase and shapefile formats (with geochemical plots as hyperlinked .jpg files) prepared with ESRI^® ArcGIS^® 9.1 and 9.2 software. Details of the GIS data sets are provided in a readme (.pdf) and metadata (.pdf) file. Available on 1 CD-ROM. $20.00.

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MRD 227 – Results of 2005 and 2006 Oro Moraine Drilling Program in the Barrie Area, Central Ontario

This release consists of data resulting from the 2005 and 2006 Oro Moraine drilling programs in the Barrie area of central Ontario. A total of 18 holes were drilled, logged and sampled. The data consist of written logs, which include unit descriptions with sample locations and representative photographs; and visual logs, which include detailed and summary lithology, grain size and select carbonate results. A map of drilling locations and the results of particle size analyses and chittick analyses are also included in this release. The data are available as hyperlinked documents (.htm) and as independent picture files (.pdf), Microsoft^® Word documents (.doc), Microsoft^® Excel files (.xls) and text files (.txt). Select data from the previously released 2004 drilling program (Miscellaneous Release—Data 198), including visual logs presented in the 2005 and 2006 format, grain size and carbonate results, are also included. The files are on 1 CD-ROM. $20.00.

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MRD 228 – Physiography of Southern Ontario

Physiography of Southern Ontario was first printed in 1951 and was republished and updated in 1966 and 1984. This historical publication has only been available as hard-copy colour maps and an associated hard-cover book. Physiography of Southern Ontario has for many years been of value to engineers, scientists, students, teachers and the public interested in physical structure of the southern portion of the province. The Physiography of Southern Ontario map remains an important, highly used publication which complements the 1:50 000 scale surficial mapping that covers most of southern Ontario. The Sedimentary Geoscience Section, Ontario Geological Survey, has captured the physiographic information protrayed on this map in an attributed GIS-based map. The map data are provided as ESRI^® ArcInfo^® coverages in geographic coordinate system NAD83, decimal degrees. The map data set consists of 4 coverages capturing information on the physical structure of southern Ontario; linear features, such as beaches and escarpments; point features, such as dunes and mud flow scars; as well as landforms (drumlins and moraines) and physiographic regions. Data are available in ArcGIS^® with a completed project file (.mxd). The data are available on 1 DVD-ROM. $25.00.

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MRD 229-REV – Till Compositional Database: Investigation of the Overburden Signature of the Caribou Lake Greenstone Belt Area, Armstrong, Ontario, Canada-Revised

This digital data release, which accompanies Open File Report 6223, contains the results of laboratory analysis of till samples collected from north of Lake Nipigon and in the area east of Armstrong centred on the Caribou Lake greenstone belt. The results from heavy mineral concentration and mineral identification and heavy mineral and till matrix geochemistry (ICP–MS, ICP–OES and NiS-FA) are provided as spreadsheet (.csv format or Microsoft^® Excel^® .xls format) files, geographic information software (GIS) (.shp format) files and dot plots of selected results (.tif format). Digital data release MRD 229–Revised (replacing Miscellaneous Release—Data 229 (released December 11, 2007) contains changes in the shape file “dp_norm_precious” and 2 associated dot plots, and unit of measure changes on 6 dot plots for NiS-FA analytical results (ppb (not ppm). The data are available on 1 CD-ROM. $20.00.

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MRD 230 – U-Pb Columbite-Tantalite Geochronology of Rare-Element Pegmatites from the Superior Province of Ontario

This digital release presents U-Pb isotopic analyses of columbite-tantalite mineral separates from rock samples representing a wide range of rare-element pegmatite types and settings in the Superior Province of Ontario. The samples were analyzed by Geospec Consultants Limited of Edmonton, Alberta, using combined TIMS (thermal ionization mass spectrometry) and LA-MC-ICP-MS (laser ablation multi-collector inductively coupled mass spectrometry) techniques. The data comprise tabular and graphical results of the analyses (in Microsoft® Excel® 2003 (.xls) and .jpg file formats); back-scattered electron (BSE) images depicting the analyzed areas of columbite-tantalite grains (in .jpg file format); sample location information and brief descriptions (in Microsoft® Excel^® 2003 (.xls) format); and the summary report by Geospec Consultants (in Microsoft^® Word ^® 2003 (.doc) and portable document (.pdf) formats). The data are on 1 CD. $20.00.

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MRD 231 – Electron Microprobe and Bulk Rock and Mineral Compositions from S-Type, Peraluminous Granitic Rocks and Rare-Element Pegmatites, Georgia Lake Pegmatite Field, Quetico Subprovince, North-Central Superior Province of Ontario

This digital release contains all compositional data produced by a 2003 regional investigation of peraluminous, S-type granitic and pegmatitic granitic rocks and proximal rare-element pegmatites in the Georgia Lake area of the Quetico Subprovince. The data set comprises 2331 electron microprobe, 237 bulk rock and 126 bulk mineral (potassium feldspar, muscovite and beryl) compositions. Field notes (FWB and JBS) are also provided. In addition, 49 colour photographs and 43 figures (some in colour) from OFR 6199, The Georgia Lake Rare-Element Pegmatite Field and Related S-Type, Peraluminous Granites, Quetico Subprovince, North-Central Ontario, are provided as 55 JPEG format (.jpg) and 64 tagged image format (.tif) files, respectively. Location information, tables and probe data are presented as Microsoft^® Excel^® 2003 (.xls) spreadsheets (27 files). Location data are provided in the Universal Transverse Mercator (UTM) projection and grid system, zone 16, North American Datum 1983 (NAD83). The files are available on 1 CD. $20.00.

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MRD 232 – Sample Location Maps for Archived Peraluminous S-Type Granites, Rare-Element Pegmatites and Miscellaneous Granitic and Migmatitic Rocks, Mainly from the Superior Province of Ontario

This digital release contains sample location maps for, and photographs of, the extensive range of specimens and thin sections of granitic, pegmatitic, and migmatitic rocks collected over several years’ of field work throughout the northern parts of Ontario. These field study areas encompass locations in the English River and Winnipeg River subprovinces under various helicopter-supported reconnaissance mapping projects such as Operations Ignace–Armstrong, Kenora–Sydney Lake, Kenora–Ear Falls, Miniss–Tully lakes and the Marchington Lake area. Other areas include the Cartier batholith north of Elliot Lake, Operation Treasure Hunt areas in the Quetico and Wabigoon subprovinces, Separation Rapids pegmatite group, Pakeagama Lake pegmatite group, Dryden pegmatite field and the Ghost Lake batholith, Raleigh Lake pegmatite group near Ignace, and the Georgia Lake pegmatite field. Location data, where given, are in the Universal Transverse Mercator (UTM) projection and grid system, zones 15, 16 and 17, North American Datum 1983 (NAD83), or in latitude and longitude in the case of samples collected prior to GPS technology. Available on 1 DVD. $25.00.

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MRD 233 – Precambrian Geology and Aeromagnetic Data of the Hudson Bay and James Bay Lowlands Region with Precambrian Basement Depth Estimates and Related Tables of Geochronology and Diamond-Drill Hole Data

This digital data release comprises maps of interpreted Precambrian geology underlying the Hudson Bay and James Bay lowlands; aeromagnetic and gravity maps of the region encompassing the Hudson Bay and James Bay lowlands; Landsat images and digital elevation models (DEM) of the lowlands; the results of estimated depth to Precambrian basement under the James Bay Lowland interpreted from aeromagnetic data; a table of diamond-drill hole sites, depths to Precambrian basement, and rock type where available; a table and location map of kimberlite pipes; and a table of geochronology of Precambrian rocks within the lowlands area. The data are being released in conjunction with Preliminary Maps P.3599, P.3597—Revised and P.3598—Revised. The geological interpretation is presented in geodatabase, shapefile and portable document (.pdf) formats with explanatory notes. The results of a study to estimate depths to basement are presented in shapefile, GeoTiff and portable document (.pdf) formats along with explanatory notes. Tables of diamond-drill hole data and geochronology are presented in Microsoft^® Excel^® 2003 (.xls) spreadsheets. The files are available on 2 DVDs. $50.00.

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MRD 234 – Till Compositional Database: Dona Lake Mine Area, Pickle Lake, Ontario

This digital data release contains the results of laboratory analysis of 14 till samples collected in 2006 from the area around the Dona Lake Mine, located approximately 9 km southeast of Pickle Lake, Ontario. The study area is bounded by latitudes 51°20′N and 51°27′N and longitudes 90°15′W and 90°05′W. The purpose of the study was to determine the response of “carbonate till” to changes in local bedrock lithology. The results from heavy mineral concentration and mineral identification, and heavy mineral and till matrix geochemical analyses for these samples are provided as spreadsheet files (.xls or .csv formats), GIS files (.shp format) and dot plots of selected results (.tif format). General background information on the bedrock geology and glacial deposits in the area is summarized in a report file (.doc and .pdf formats). The files are available on 1 CD. $20.00.

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MRD 235 – Electron Microprobe and Bulk Rock and Mineral Compositions from Rare-Element Pegmatites and Peraluminous, S-Type Granitic Rocks from the Fort Hope Pegmatite Field, North-Central Superior Province of Ontario

This digital release contains all composition and field data produced on a 2004 investigation of peraluminous, S-type granitic and pegmatitic granitic rocks and proximal rare-element pegmatites in the Lilypad Lakes–Eabamet Lake area of the Uchi Subprovince. The data set comprises 1366 electron microprobe, 24 bulk rock and 8 bulk mineral (potassium feldspar and muscovite) compositions. Also provided are field photographs, backscattered electron images and mineral compositional variation diagrams (oxide minerals and tourmaline) (.jpg and .tif formats). Location information, sample descriptions and probe data are presented as Microsoft^® Excel^® 2003 (.xls) spreadsheets (4 files). Location data are also embedded in the field notes and are provided in the Universal Transverse Mercator (UTM) projection and grid system, Zone 16, North American Datum 1983 (NAD83). The files are available on 1 CD. $20.00.

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MRD 237 – Lithogeochemical Data for Metavolcanic Rocks in the Wabigoon–Dinorwic Area, Northwestern Ontario

This data release contains location and whole rock and trace element geochemical data for 277 samples of metavolcanic rocks collected during detailed mapping in the Wabigoon–Dinorwic area of northwestern Ontario. The areas within which the samples were collected are covered by 2 previously released Ontario Geological Survey maps: Map P.3529 (Thunder Lake area), and Map P.3582 (Butler Lake–Dinorwic Lake area). Both maps are included on this release in portable document format (.pdf). The data are available as 1 Microsoft^® Excel^® 2003 (.xls) file, without interpretation, on 1 CD. $20.00.

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MRD 238 – Geological, Geochemical and Geochronological Data from the North Spirit Lake Area, North Spirit Lake Greenstone Belt, North Caribou Terrane, Northwestern Ontario

This release contains whole-rock, trace element and rare earth element geochemical data, field photographs and photograph descriptions, magnetic susceptibility data, Summary of Field Work articles and copies of the Preliminary Maps, for the North Spirit Lake area and the Hewitt Lake area where mapping was conducted in 2007 as part of the Far North Geological Mapping Initiative. This release consists of geochemical data (2 Microsoft^®Excel^® 2003 (.xls) spreadsheet files), magnetic susceptibility data (2 Microsoft^® Excel^® 2003 (.xls) spreadsheet files) and 1666 digital photographs (.jpg files) with descriptions (2 documents in Microsoft^® Excel^® 2003 (.xls) format). These data augment previously released Preliminary Maps P.3603 and P.3604, digital versions of which are provided in portable document format (2 .pdf files). In addition, 2 articles for the North Spirit Lake area and the Hewitt Lake area, published in Summary of Field Work and Other Activities 2007, as well as 1 article published in Summary of Field Work and Other Activities 2008 are provided (3 portable document format (.pdf) files). The data are available on 1 DVD. $25.00.

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MRD 239 – GIS Compilation of Mineral Occurrences of the Central and Eastern Uchi Domain

This digital release is a compilation of mineral occurrences of the central and eastern Uchi domain of northwestern Ontario. The compilation was conducted during 2006–2007 as part of the Far North Geological Mapping Initiative. These data are being released in conjunction with Open File Report (OFR) 6228, Mineral Occurrences of the Central and Eastern Uchi Domain. OFR 6228 provides detailed occurrence descriptions; however, additional data for the mineral occurrences are provided as 2 Microsoft^® Excel^®2003 (.xls) files. Two colour figures (Map 1 and Map 2) and Figure 10 (all 1:250 000 scale) accompany OFR 6228; digital versions of the 2 maps, Figure 10 and OFR 6228 are provided in portable document format (4 .pdf files). This release provides .mxd and geodatabase files in ESRI^® ArcGIS^® 9.2 format, as well as shapefiles, for Map 1, Map 2 and Figure 10. Location data are provided in the Universal Transverse Mercator (UTM) projection and grid system, zones 15 and 16, North American Datum 1983 (NAD83). Available on 1 CD. $20.00.

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MRD 241 – Post-Archean Mafic (Diabase) Dikes and Other Intrusions of Northwestern Ontario, North of Latitude 49°30′

This digital data release comprises a GIS-compatible version of Preliminary Map P.3606, which shows Proterozoic mafic (diabase) dikes across northwestern Ontario, north of 49°30′. The map is based on a visual interpretation of diabase dikes using re-processed aeromagnetic data from regional and high-resolution surveys. The results provide an interpretation of the different dike swarms subdivided on the basis of dike orientation and some local dike age determinations. Digital files on this DVD include shapefiles; a GIS version of the map; seamless aeromagnetic map of the region showing the publicly available high-resolution aeromagnetic coverage across some greenstone belts, embedded in the regional aeromagnetic image; and a table of geochronology of selected diabase dikes. The data are on 1 dual-layer DVD. $25.00.

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MRD 243 – Lake Sediment and Water Geochemical Data from the Nipigon–Beardmore Area, Northwestern Ontario

Lake sediment and water geochemical data and lake water quality (limnological) data, including quality control data, collected from a survey of 2136 sites in the Nipigon to Beardmore area of northwestern Ontario are being released in conjunction with Open File Report 6231. Data are available in Microsoft^® Excel^® 2003 file format (.xls) on 1 CD. $20.00.

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MRD 244 – Geological, Geochemical and Geochronological Data for the Winisk Lake Area, Northwestern Ontario

This release consists of field photographs, locational data, whole rock and trace element lithogeochemical data, magnetic susceptibility data, and geochronological data, and is being released in conjunction with Preliminary Map P.3607 (provided in portable document format (.pdf)). A related Summary of Field Work and Other Activities 2007 article (.pdf) is also provided on this release. Data are available in Microsoft^® Excel^® 2003 file format (.xls) on 1 DVD. $25.00.

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MRD 245 – GIS Compilation of the Burntbush–Detour Lakes Area, Abitibi Greenstone Belt

The contents of this product comprise ArcGIS^® 9.2 and portable document format (.pdf) files of Map P.3609; georeferenced GeoTIFF images of airborne magnetic, digital elevation model and gravity data; logs of assessment file drill holes coded by the authors in accordance with the legend for P.3609; information from the Mineral Deposit Information(MDI) database concerning the mineral deposits of the area; lithogeochemical data from the lithogeochemical database; and geochemical and geochronological data from samples collected by the authors for this study. The data are presented in various file types, available on 1 DVD. $25.00.

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MRD 261 – Geochemistry of Midcontinent Rift-Related Mafic Intrusions, Thunder Bay Area

This release is part of an ongoing project to examine and characterize the mafic sills and dikes that extend from south of Thunder Bay to northeast of Lake Nipigon, representing the northern expression of the Mesoproterozoic Midcontinent Rift. This data release includes geochemical analyses for 267 bedrock and diamond-drill core samples collected from a variety of intrusions on the Black Bay and Sibley peninsulas and around the city of Thunder Bay between 1999 and 2008. In addition, a representative subset of 34 samples was analyzed for Rb-Sr and Sm-Nd isotopes in order to subdivide the mafic intrusions near Thunder Bay and to allow comparison with sills identified around Lake Nipigon. The data, a brief project summary and a map of sample locations are available as Microsoft® Excel^®2003 (.xls), Microsoft^®Word^® 2003 (.doc) and portable document format (.pdf) files on 1 CD. $20.00.

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MRD 262 – GIS Compilation of Geospatial Data from the Atikokan Area, Northwestern Ontario

This data release is a synthesis of over 60 publications that cover a 19 000 km2 area centred roughly on the town of Atikokan. Geological, geophysical, geochemical, assessment file, mineral deposit and drill hole data have been compiled from reports, maps, data sets and databases, primarily from the Ontario Geological Survey, but also from other organizations such as the Geological Survey of Canada. The data, which comprise images, text documents, spreadsheets and project files in many different formats, were compiled in ESRI ArcGIS^® version 9.3, but a variety of ESRI file types are provided in this release, so that the data may be viewed in ArcGIS^® versions 8.3, 9.0 and 9.1, 9.2 and 9.3, or in ESRI ArcReader^®. All original data used to create the ArcGIS^® files have also been included. The files are on 2 dual-layer DVDs. $50.00.

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MRD 263 – Surficial Geology Map Compilation of the Abitibi Region, Northern Ontario

The Ontario Geological Survey (OGS), Sedimentary Geoscience Section, has generated an attributed GIS-based, seamless surficial geology compilation map of the Abitibi region, northern Ontario. A total of 26, 1:50 000 scale surficial geology maps published by the OGS were used in this compilation. Map data are provided as ESRI ArcInfo^® coverages in UTM zone 17 NAD 83 and completed .mxd project files. The map data set captures information on Quaternary geological units; sand and gravel pits; linear features, such as eskers and bluffs; and point features, such as drumlins and glacial striae. Also included is a shaded relief image of the area, created using the digital elevation model (DEM) produced by the Ontario Ministry of Natural Resources. The data are also provided in .kml format for viewing in Google^™ Earth. A “readme file” is included in Microsoft^® Word^® (.doc) and portable document format (.pdf), which provides information concerning the GIS compilation, a geologic legend for the maps, as well as a “Getting Started” section. The data are useful for many purposes, including groundwater and surface water studies, other environmental studies, geotechnical investigations, land-use planning and mineral exploration. This data may be of interest to the land-use planning, consulting, aggregate/industrial mineral industry and development community as well as government geoscientists, resource scientists, conservation authorities, land-use planners and academic researchers. The files are on 1 CD. $20.00

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