Publications Release Notice — July 3, 2020

Mines and Minerals Division: 

The following publications are being released on July 3, 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

Precambrian Geology — Northwestern Ontario

Miscellaneous Release—Data 379
Geological and Geochemical Data from the Terrace Bay Pluton, Western Schreiber–Hemlo Greenstone Belt, Wawa–Abitibi Terrane, Northwestern Ontario; by K.A. Arnold, P. Hollings and S.J. Magnus. This digital data release includes field notes and whole rock geochemical data collected as part of the Terrace Bay pluton mapping project. The Terrace Bay pluton, also known as the Terrace Bay batholith, is located in Syine, Strey and Priske townships, within the western portion of the Schreiber–Hemlo greenstone belt, in the Wawa–Abitibi Terrane of the Superior Province. The Terrace Bay pluton mapping project was supported by an Ontario Geological Survey–Lakehead University Mapping School agreement; these data are part of an unpublished Master of Science (MSc) thesis by the lead author. This release comprises 2 Microsoft® Excel® for Office 365 (.xlsx) workbook files and 3 documents in portable document format (.pdf). The data are available on 1 CD. $20.00.

Precambrian Geology — Far North

Open File Report 6359
Precambrian Geology of the McFaulds Lake “Ring of Fire” Region, Northern Ontario; by R.T. Metsaranta and M.G. Houlé. Accompanied by Preliminary Maps P.3804, P.3805 and P.3806, 260p. $65.45.


In Open File Report 6367, Report of Activities 2019, Resident Geologist Program, Kirkland Lake Regional Resident Geologist Report: Kirkland Lake and Sudbury Districts (released April 28, 2020), a few errors and inconsistencies were noted in both reports and have been addressed. Please note the following changes.

Kirkland Lake District Report

The cumulative gold production value in the Kirkland Lake District report is corrected in the text and in Table 1 (bold text below indicates the corrections).

  • On page 3, paragraph 1, line 2, the correction is as follows: “Cumulative gold production (excluding re-treated tailings) to the end of 2019 in the District, stands at 46 639 363 ounces (Table 1).”
  • The corrections to Table 1 (referring to entries on page 5) are as follows:

Corrections to Table 1 from Report of Activities 2019, Kirkland Lake

Sudbury District Report

An inconsistency in the use of “sample” number or numbers was noted in the Sudbury District report and is replaced by the word “station” in 3 specific sentences (bold text below indicates the corrections).

  • On page 55, paragraph 4, line 4
    “The apatite and allanite portion of the eastern margin of the pegmatite is locally radiogenic, as summarized in Table 32 (station numbers 19RME-3001).”

  • On page 55, paragraph 5, line 4
    “This pegmatite is nonradiogenic (station number 19RME-3003, Table 32). It is hosted in a migmatitic mafic gneiss.”

  • On page 56, paragraph 1, line 3
    “This pegmatite is also nonradiogenic (station numbers 19RME-3002, Table 32). It is hosted in a variably migmatitic, texturally varied, mafic gneiss.”

We regret any inconvenience these errors may have caused.


Preliminary Map P.3838, Quaternary Geology of the Cochrane Area, Northeastern Ontario, Map P.3839, Quaternary Geology of the Abitibi Area, Northeastern Ontario, and Map P.3840, Quaternary Geology of the Iroquois Falls Area, Northeastern Ontario (all released June 11, 2019), have been updated to include information to indicate these maps are associated with Preliminary Map P.3836, Quaternary Geology of the Kapuskasing Area, Northeastern Ontario, and Map P.3837, Quaternary Geology of the Smooth Rock Falls Area, Northeastern Ontario (both released May 20, 2020). Maps P.3838, P.3839 and P.3840 have a new appearance, but the technical information provided in these maps has not changed. The updates are the following: 1) footnotes indicating that all 5 maps have a common legend were added to i) “Legend” and ii) “Symbols”; 2) Figure 1, the outline of the Cochrane extent of lidar digital terrain model data, was modified to include the lidar extents for all 5 map areas; and 3) the location map was modified to include the locations of all 5 maps.

If you have purchased a copy of P.3838, P.3839 and/or P.3840 and wish to receive replacement copies, please contact Publication Sales and the new version will be sent to you free of charge. Alternatively, the new versions of Preliminary Map P.3838, Preliminary Map P.3839 and Preliminary Map P.3840 are available for downloading free of charge on GeologyOntario.

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