Ontario Geological Survey
Permanent Link to this Record:
MDI52N04NW00006
| Record Name(s) | Cochenour - Hoyles Bay - 1966, Hoyles Bay - 1966 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1982-Aug-27 |
| Date Last Modified | 2022-Jun-21 |
| Created By | |
| Revised By |
Primary Commodities: Silver
Secondary Commodities: Gold
Township or Area: McDonough
Latitude: 51° 8' 8.33" Longitude: -93° 46' 39.82"
UTM Zone: 15 Easting: 445586.69 Northing: 5665197.03 UTM Datum: NAD83
Resident Geologist District: Red Lake
NTS Grid: 52N04NW
Point Location Description: N/A
Location Method: Data Compilation
1966: Cochenour Explorations Ltd.- DD-1
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 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 | Chert | 1 | Graphitic | Host |
|---|---|---|---|---|
| Mudstone | 2 | Graphitic Argillite | Sheared | Host |
| Sandstone | 3 | Arkose | Near | |
| Mafic pillowed flow | 4 | Variolitic, Pillowed | Near | |
| Diorite | 5 | Diorite | Dikes | Intrudes |
Nov 12, 2014 (K R Kettles) - The area underlying the occurrence is composed of mafic metavolcanics and metasediments. All of these units strike to the northeast and have nearly vertical dips. The mafic metavolcanics are primarily composed of pillowed and variolitic flows. Stratigraphic tops are to the west-northwest. The metasediments are composed of argillite and arkosic sandstone and overlie and underlie the mafic metavolcanics. Thin units of graphitic argillite chert and marble are present in the sequence. Narrow diorite dikes intrude the rocks in the vicinity of the occurrence.
| 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 | Pyrite | Economic | Ore | ||||
| 4 | Pyrrhotite | Economic | Ore | ||||
| 1 | Graphite | Economic | Gangue |
Nov 12, 2014 (K R Kettles) - Values in silver are reported to occur in sulphide rich stringers and lenses in graphite argillite and chert. Only trace values in gold have been reported, but a 1.5 m section of drill core returned an assay of 0.10 oz/ton (3.429 g/tonne)Ag.
Dec 07, 2005 (K R Kettles) - The mafic metavolcanics in the area have been highly carbonatized.
File - Resident Geologist files AF RL 1966 McDonough #24
Publication Number: Date: 1966
Author: Gislason, B.G.
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: 550-551 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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