Errata - Miscellaneous Papers

MP 168

Miscellaneous Paper 168, Summary of Field Work and Other Activities 1997, contains the following errors:

Page 2, map showing locations of Precambrian Geoscience Section project areas: some location polygons are mislabeled and one polygon is missing.
Page 34, Figure 8.5: a large unit depicted as "hornblendites, hornblende-clinopyroxene diorite to monzodiorite" in the upper half of the figure should have been labeled as "tonalite". Additionally, a few units on the figure are missing patterns.

If your copy of MP 168 did not contain replacement pages for page 2 and page 34, please contact the Publication Sales Office and replacement pages will be sent to you free of charge.

An incorrect location map was used in the Summary of Field Work and Other Activities 1995 (MP 164). If you purchased a copy of this publication, please contact Publication Sales and a replacement page will be sent to you free of charge. (Dec. 11/95.)

MP 163

Summary of Field Work and Other Activities 1994, OGS MP 163, was released with a paragraph missing from page 106. If you purchased a copy of MP 163, contact Publication Sales and a replacement page (an erratum sheet) will be sent to you free of charge. Also, the price of this publication was listed incorrectly in the Release Notice; the correct price is $12. (Dec. 5/94).

Recommendations for Exploration 2020-2021

In Recommendations for Exploration 2020–2021 (released January 18, 2020), several errors were noted in article 6 and have been corrected as follows.

On page 25, paragraph 3, lines 4 and 5, the following text indicates the changes to correct the drill hole number and the assay value; and to correct several references (bold text below indicates the corrections):
“with the deepest hole (DDH 70-6) extending 226 m and including an assay of 0.53 Ag/oz over 4.9 m (Zurowski 1970a, 1970b; Peterson 1970a, 1970b, 1970c). Several airborne and ground-based geophysical surveys have also”
On page 26, paragraph 2, lines 2 and 3, the following text indicates the changes to correct the assay values of silver, zinc and gold; and to correct several references (bold text below indicates the corrections):
“program found elevated levels of silver (0.56 oz/ton), copper (0.4%), nickel (0.03%), zinc (0.4%) and gold (0.005 oz/ton) (Peterson 1970a, 1970b, 1970c; Zurowski 1970a, 1970b).”
On page 28, under “References”, the following 3 references for Peterson 1970a, 1970b, 1970c were added to replace the single entry for Peterson 1970 (bold text below indicates the corrections):
Peterson, R. 1970a. Claim Group-A diamond-drill logs. Tontine Mining Limited; Thunder Bay Resident Geologist’s Office, assessment file 42L06SW0066, AFRO# 17, 2p.
——— 1970b. G-K Project diamond-drill logs. Tontine Mining Limited; Thunder Bay Resident Geologist’s Office, assessment file 42L06SW0068, AFRO# 15, 3p.
——— 1970c. Claim Group-D diamond-drill logs. Tontine Mining Limited; Thunder Bay Resident Geologist’s Office, assessment file 42L05SE0058, AFRO# 19, 4p.

These errors have been corrected (March 2, 2021). Download the corrected version of Recommendations for Exploration – 2020-2021 (PDF)

In Recommendations for Exploration 2020–2021 (released January 18, 2021), in article 12, “Looking for Gold in the Eastern Parts of the Kidd–Munro Assemblage”, several errors were noted in the figures. These have been corrected as follows.

In Figure 1 (page 55), there was an error in the scale bar. The figure has been modified to correct the scale bar. Additionally, the legend has been rearranged to improve legibility.
In Figure 2 (page 56), mismatches were noted between the mineral occurrences labelled on the figure and those listed in the table in the lower right corner of the figure. The figure has been modified to remove the list of mineral occurrences from the figure and have it become Table 1. The ID numbers in the table are now properly keyed to occurrences on the figure. In addition, there was an error in the scale bar, which has also been fixed. The figure caption has been revised (bold text below indicates the change):
“Figure 2. Simplified map of the easternmost part of the Kidd–Munro assemblage in the Kirkland Lake District (modified from Berger 2010) highlighting the major geological structures and the locations of documented gold-related mineral occurrences, as keyed to Table 1 (MDI; Ontario Geological Survey 2020a).”

The new Table 1 and its caption have been added (ID numbers are now properly keyed to occurrences on Figure 2):
Table 1. Documented gold-related mineral occurrences (keyed to Figure 2).

ID	MDI Number	Location Description	Comment
5	MDI32D12SE00035	Diamond-drill hole 88-03	No logs
11	MDI32D12SE00143	Pit	0.10 oz/t gold (grab)
12	MDI32D12SE00028	Diamond-drill holes DDH8a, DDH9 & DDH11	Up to 0.2 oz/t gold
13	MDI32D12SE00020	Adit	Trace gold (grab)
14	MDI32D12SE00008	DDH, underground workings	5.83 g/t Au (resource)
15	MDI32D12SW00219	Drill-hole collar on claim 43078	Discretionary occurrence
16	MDI32D12SE00140	Collar of DDH9	Up to 0.02 oz/t gold
17	MDI32D12SE00014	Diamond-drill hole 49-02-07	910 ppb Au
18	MDI32D12SE00047	Sonic drill-hole 88-06	Trace gold in till
19	MDI32D12SW00068	Sonic drill-hole 85-43	Trace gold in till
22	MDI32D12SW00069	Sonic drill-hole 85-42	Trace gold in till
23	MDI32D05NW00070	Backhoe till sample 85-35B	5000 ppb Au
25	MDI32D12SE00007	Group of 20 diamond-drill holes	Developed prospect
26	MDI32D12SE00048	Sonic drill-hole 88-16	Trace gold in till
27	MDI32D12SE00002	Diamond-drill hole	Up to 0.5 oz/t gold
31	MDI32D12SE00013	Diamond-drill hole 49-04-01	Up to 2.43 g/t Au
32	MDI32D12SE00012	Diamond-drill hole 010-47-1	Average 1.270 ppb Au

The figure caption for Figure 3 (page 57) has been revised (bold text below indicates the changes, excepting “A)” and “B)”):
“Figure 3. The Riedel-type structural model (R, R′ shears) applied to A) the Windfall Lake deposit, Quebec (Murahwi and Torrealba 2020) and B) the eastern portion of the Kidd–Munro assemblage. Both figures modified from Katz, Weinberger and Aydin (2004). Abbreviations: MZ, mineralized zone; NBPDFZ, northern branch Porcupine–Destor fault zone; PDFZ, Porcupine–Destor fault zone.”
In addition, the layout of pages 55 to 58 is modified to accommodate the addition of Table 1.

These errors have been corrected (as of February 17, 2023). Download the corrected version of Recommendations for Exploration – 2020–2021 (PDF).

Recommendations for Exploration 2018-2019

In Recommendations for Exploration 2018–2019 (released February 5, 2019), several errors were noted in article 15 (p.76-80). Extensive and substantive modifications were made to the descriptions of the geology and to the resultant interpretations, with additional changes to the references. The following critical corrections (shown in bold) were made to this article: each mention of drill-hole L 13 was corrected to drill-hole EC-16, and the UTM co-ordinates were corrected to 454130E 5389330N (using North American Datum 1983 in Zone 17). A “Post-Publication Addendum and Errata” with a detailed explanation has been added to the publication. Note, the analytical data reported in the publication have not been affected.

The corrected version of Recommendations for Exploration – 2018-2019 (PDF) is available.

Notification Date of Errata: February 17, 2023.

Explore Report 1994/Rapport d'exploration 1994

In the March 11, 1996 Release Notice, the explanatory note accompanying Explore Report 1994/Rapport d'exploration 1994 should have read "A statistical compilation of mineral exploration and development expenditures in Ontario in 1994".