Publications Release Notice — October 30, 2020

Mines and Minerals Division: 

The following publications are being released on October 30, 2020, at 10:00 a.m. Eastern Time, or 9:00 a.m. Central Time, unless otherwise indicated. To automatically receive the Publications Release Notice by email, subscribe to the distribution list by contacting Publication Sales.

Maps and reports in hard-copy (paper) format and digital data sets available on physical media CD or DVD) can be purchased from the Publication Sales office. Publications can be downloaded for free from the GeologyOntario application or by following the links provided in this release notice. In cases where the file size is prohibitive for downloading, please contact the Publication Sales office to obtain the data on physical media (CD for $20.00; DVD for $25.00).

The digital data provided with maps as downloadable zip files from GeologyOntario contain additional information that supplements the cartographic information, and is provided at the discretion of the author(s).

Prices listed in this Release Notice apply to hard-copy versions only and are subject to change without notice. The prices given in a particular release notice are guaranteed only for a period of 1 month following the date of the release.

Earth Resources and Geoscience Mapping Section

Groundwater Studies

Groundwater Resources Study 13
Early Silurian Sequence Stratigraphy and Geological Controls on Karstic Bedrock Groundwater-Flow Zones, Niagara Escarpment Region and the Subsurface of Southwestern Ontario; by F.R. Brunton and C. Brintnell. This digital product comprises a regional outcrop and subsurface study of the early Silurian Lockport Group in southwestern Ontario, western New York State and Michigan, covering an area of 170 000 km2. The study involved the development of protocols for investigating groundwater-flow zones in Silurian sedimentary dolostone caprocks that make up the Niagara Escarpment and cuesta. A key element of the borehole investigations within the potable ground water region of the Niagara Escarpment and cuesta was the integration of optical and acoustic televiewer logs with gamma-ray logs to 1) improve regional stratigraphic pick criteria at formational rank; 2) improve subsurface karst identification; and 3) provide gamma-ray log profiles that highlight the stratigraphic complexity of the Lockport Group for comparison with deeper subsurface oil and gas well data. The study includes data compiled by Candace Brintnell for her Honours BSc and MSc theses at Western University, London, Ontario. The study addresses the historical challenges of the varied nomenclature applied to these early Silurian stack dolostones in Ontario and neighbouring USA states surrounding the Great Lakes region. Type sections are selected and described for the Eramosa and Guelph formations in the City of Guelph. The models for subsurface pinnacle structures are critically assessed relative to the updated stratigraphic nomenclature of the Lockport Group. The report summarizing the results of the study is provided as a portable document format (.pdf) file and is accompanied by 7 appendixes that include stratigraphic sections (.tif) for 346 boreholes and select carbon and oxygen isotopic geochemical profiles. Microsoft® Excel® for Office 365 (.xlsx) tables provide information on the locations of boreholes used in the study. A keyhole markup language zipped file (.kmz) is included that depicts the borehole and outcrop locations used for the creation of the conceptual block models as well as the relative stratigraphic positions of the key karstic bedrock flow zones. The file provides hyperlinks to all borehole logs provided in this study. The data are available on 1 DVD. $25.00

Geophysics

Airborne Geophysical Survey
Biscotasing Area

1:20 000 Scale Map Sheets

Location map for Biscotasing area geophysical survey, 1:200000 scale maps.

Map 83 000, Map 83 001, Map 83 002, Map 83 003, Map 83 004, Map 83 005
Airborne Magnetic and Electromagnetic Surveys, Residual Magnetic Field Contours with Electromagnetic Anomalies and Keating Correlation Coefficients, Biscotasing Area; by Ontario Geological Survey, scale 1:20 000, colour. Map prices range from $13.15 to $15.70.

1:50 000 Scale Map Sheets

Location map for Biscotasing area geophysical survey, 1:500000 scale maps.

Map 83 006, Map 83 007
Airborne Magnetic and Electromagnetic Surveys, Colour-filled Contours of the Residual Magnetic Field and Electromagnetic Anomalies, Biscotasing Area; by Ontario Geological Survey, scale 1:50 000, colour. Map prices range from $13.45 and $12.25.

Map 83 008, Map 83 009
Airborne Magnetic and Electromagnetic Surveys, Shaded Colour Image of the Second Vertical Derivative of the Residual Magnetic Field and Keating Correlation Coefficients, Biscotasing Area; by Ontario Geological Survey, scale 1:50 000, colour. Map prices range from $13.45 and $12.35.

Map 83 010, Map 83 011
Airborne Magnetic and Electromagnetic Surveys, Colour-filled Contours of the EM Decay Constant and Electromagnetic Anomalies, Biscotasing Area; by Ontario Geological Survey, scale 1:50 000, colour. Map prices range from $17.80 and $12.10.

Map 83 012, Map 83 013
Airborne Magnetic and Electromagnetic Surveys, Colour-Filled Contours of the Apparent Conductivity and Electromagnetic Anomalies, Biscotasing Area; by Ontario Geological Survey, scale 1:50 000, colour. Map prices range from $13.20 and $12.10.

Geophysical Data Set

Geophysical Data Set 1087
Ontario Airborne Geophysical Surveys, Magnetic and Electromagnetic Data, Grid and Profile Data (ASCII and Geosoft® Formats) and Vector Data, Biscotasing Area; by Ontario Geological Survey. The data are available on 1 DVD. $25.00

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