Publications Release Notice — December 17, 2021

Mines and Minerals Division: 

The following publications are available now for free download from GeologyOntario, or by following the links provided in this release notice.

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.

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.

To automatically receive the Publications Release Notice by email, subscribe to the distribution list by contacting Publication Sales.

Earth Resources and Geoscience Mapping Section

Aggregate Resources and Industrial Minerals

Miscellaneous Release—Data 395
Pyrrhotite Distribution in Ontario: Near-Surface Occurrences and Discussion of Deleterious Effects in Concrete; by K.E. Hahn. This digital data release provides the results of a project studying the distribution of pyrrhotite in Ontario. The mineral pyrrhotite is considered deleterious when present in aggregate that is used to produce concrete. A study was undertaken, using the Ontario Geological Survey’s Mineral Deposit Inventory* (MDI) database, to map 2981 known occurrences of the mineral pyrrhotite in Ontario. Pyrrhotite occurs near surface at 562 locations, whereas 2419 locations were deemed as “other” (i.e., either occurring at depth, or the data point did not include enough information to classify as “near surface”). The files are provided in a compressed (.zip) file that contains a report (as a portable document format (.pdf) file) and an accompanying digital map (as an ESRI® ArcMap® (.mxd) document and geodatabase (.gdb)). The digital map includes additional information for point locations described in the report as well as hyperlinks to the original MDI records. Available on 1 CD. $20.00.  
*[The Mineral Deposit Inventory (MDI) has been renamed to the Ontario Mineral Inventory (OMI). This digital data release was compiled prior to the update. All OMI records retain the original MDI identifying numbers (e.g., MDI52N04SW00033). For the purpose of this data release, original MDI nomenclature and definitions are retained.]

Groundwater Studies

Miscellaneous Release—Data 283 – Revision 2
Ambient Groundwater Geochemical and Isotopic Data for Southern Ontario, 2007–2019; by S.M. Hamilton. This digital data release comprises a revision of data collected in the Ambient Groundwater Geochemistry Project, and is an update to the data released in 2015 as Miscellaneous Release—Data 283 – Revised. The new release contains data for the 2287 samples published in the 2015 release, comprising samples collected between 2007 and 2014, and an additional 3944 samples from sampling between 2015 and 2019. The 72% increase in samples all come from add-on projects of various kinds within the same study area footprint as the 2015 data. The add-on studies include, among other things, 3 aquifer screening-tool studies carried out in eastern Ontario in co-operation with several municipalities and the South Nation Conservation Authority. These studies, combined with a similar earlier study in 2013, result in an extremely high sample density in a strip of eastern Ontario that borders the Ottawa River, from west Ottawa to Hawkesbury, Ontario. Several other studies, conducted in 2015 and 2019, also result in an increased sample density on the Niagara Peninsula and along the north shore of Lake Erie to Leamington.

The project provides a comprehensive analytical characterization of the inorganic and isotopic chemistry of groundwater across all of southern Ontario, resulting in coverage of an area of approximately 96 000 km2. Parameters tested include dissolved gases, major ions, trace elements, isotopes of water, and field measurements of alkalinity, temperature, pH, redox potential and electrical conductivity. The release includes a report (.pdf), with a brief explanation of the data and quality control methods, as well as precision and accuracy plots for all parameters, as an appendix in the report; single-parameter maps (.tif) for bedrock wells plotted over bedrock geology; single-parameter maps (.tif) for overburden wells plotted over surficial geology; and a Microsoft® Excel® spreadsheet (.xlsx) containing analytical data plus station data that include well depth, type, deepest formation penetrated and other parameters. The data are available on 1 DVD. $25.00


Open File Report 6380
Summary of Field Work and Other Activities, 2021; by Ontario Geological Survey, 184p. $11.50

The Contents may be viewed on the Summary of Field Work and Other Activities, 2021 Web page.

PDF icon Location Map December 17, 2021804.57 KB