Ontario Geological Survey
Permanent Link to this Record:
MDI52N04NW00005
| Record Name(s) | Cochenour Explorations DDH #66-28 - 1966, Post Narrows - 1940, East Group Goldseekers - 1966 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Discretionary Occurrence |
| Date Created | 1982-Aug-27 |
| Date Last Modified | 2023-Jan-13 |
| Created By | |
| Revised By |
Primary Commodities: Nickel, Cobalt
Secondary Commodities: Gold, Silver
Township or Area: McDonough
Latitude: 51° 7' 41.72" Longitude: -93° 48' 24.84"
UTM Zone: 15 Easting: 443536.69 Northing: 5664397.03 UTM Datum: NAD83
Resident Geologist District: Red Lake
NTS Grid: 52N04NW
Point Location Description: Diamond drill hole
Location Method: Data Compilation
1940: The claim was part of a group held by C. Harvey. Overburden stripping and trenching were completed on adjoining claims of the Harvey group. 1962: The claim was included in the east group of Martin McNeely Mines Ltd. One drill hole was collared at the southwest corner of the claim and drilled north. 1966: The claim was part of a group held by Cochenour Expl. Ltd. One drill hole completed by Cochenour. 1969: The claim was covered by an EM survey of the Cochenour group. 1981: The claim was included in a group held by Gold Fields Mining Corp. Airborne magnetometer, ground magnetometer and VLF-EM surveys were completed.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 63.2458 | 52N04NW0047 | 52N04NW0047 |
| 11 | 52N04NW0030 | 52N04NW0030 |
Province: Superior
Subprovince: Uchi
Terrane: North Caribou
Domain: Uchi
Belt: Red Lake
Geological Age: Archean
Metamorphism Type: Regional
Metamorphism Grade: Greenschist
| Rock Type | Rank | Composition | Texture | Relationship | Mudstone | 1 | Argillite, Graphitic | Host |
|---|---|---|---|---|
| Mafic lava flow-unsubdivided | 2 | Pillowed And Brecciated | Adjacent | |
| Ultramafic lava flow-unsubdivided | 3 | Ultramafic Flows, Breccias | Spinifex Textured | Adjacent |
| Chert | 4 | Graphitic | Adjacent |
Nov 21, 2014 (K R Kettles) - The area underlying the occurrence is composed of mafic to ultramafic metavolcanics, flows and metasediments. All of the rock units strike NE-SW and have subvertical dips. The mafic and ultramafic metavolcanics are primarily composed of pillowed flows and breccias. Spinifex textures have been observed in ultramafic flows. Stratigraphic tops are to the northwest. The sedimentary rocks are primarily composed of argillite and occur to the south of the mafic metavolcanics. Thin beds of graphite and chert are interbedded with the agillite. Silver has been reported from a steeply dipping unit of graphitic argillite, which contains lenses and stringers of pyrrhotite (about 5 to 10 % po).
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Gold | Economic | Ore | ||||
| 2 | Silver | Economic | Ore | ||||
| 3 | Pyrrhotite | Economic | Ore | ||||
| 4 | Graphite | Economic | Gangue | ||||
| Carbonate | Alteration | Carbonatization | 1 | Strong | Replacement |
Nov 21, 2014 (K R Kettles) - Silver has been reported from a steeply dipping unit of graphitic argillite, which contains lenses and stringers of pyrrhotite (about 5 to 10 % po). Only trace values in gold have been reported, but an assay of 0.10 oz/ton (3.429 g/tonne) Ag over 1.5 m was obtained from a section of drill core. DDH GS-66-28 returned an assay of trace Au, 0.1 oz/t Ag, 0.01% Ni and 0.01% Co.
Jan 13, 2023 (Q Unknown) - The best intersection in DDH GS66-42 was 0.2% Cu, 0.1% Zn, 0.02% Ni, 0.01% Co, and 0.1 oz/t Ag over 6.9 feet (Assessment report 52N04NW0047).
Dec 07, 2005 (K R Kettles) - The mafic metavolcanics noted in drill core were highly cabonatized.
File - Resident Geologist files AF RL 1981 McDonough #32
Publication Number: Date: 1981
Author:
Publisher Name:
Location: Red Lake RGP
File - Resident Geologist files AF RL 1988 McDonough #56
Publication Number: Date: 1988
Author:
Publisher Name:
Location: Red Lake RGP
Mono - Gold occurrences, prospects, and deposits of the Red Lake area, volumes 1 and 2
Publication Number: OFR5558 Page: 544-545 Date: 1987
Author: Durocher M.E., Burchell P.S., Andrews A.J.
Publisher Name: Ontario Geological Survey
Location:
Map - Geological series, McDonough Township, District of Kenora (Patricia Portion)
Publication Number: P1240 Scale: 1:12,000 Date: 1977
Author: Pirie J., Sawitzky E.
Publisher Name: Ontario Geological Survey
Location:
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