Ontario Geological Survey
Permanent Link to this Record:
MDI52N04NE00068
| Record Name(s) | McDonough 5 Occurrence - 1987, Cochenour Exploration Hoyles Bay Group - 1966 |
|---|---|
| Related Record Type | Simple |
| Record Status | Discretionary Occurrence |
| Date Created | 1997-Feb-09 |
| Date Last Modified | 2022-Jan-05 |
| Created By | K R Kettles |
| Revised By | C Storey |
Primary Commodities: Gold
Township or Area: McDonough
Latitude: 51° 8' 34.72" Longitude: -93° 47' 26.58"
UTM Zone: 15 Easting: 444686.706 Northing: 5666022.034 UTM Datum: NAD83
Resident Geologist District: Red Lake
NTS Grid: 52N04NE
Point Location Description: Trench symbol at West end of Hoyles Bay map P.1240
Location Method: Data Compilation
Access Description: On shore of Hoyles Bay.
No history of exploration given in OFR 5558, assumed grab sample by OGS mapping crew.
Province: Superior
Subprovince: Uchi
Terrane: North Caribou
Domain: Uchi
Belt: Red Lake
Geological Age: Archean
Metamorphism Type: Regional
Metamorphism Grade: U. Greenschist
Dec 07, 2005 (K R Kettles) - GEOLOGICAL DESCRIPTION: The occurrence is located in a thin unit of sulphide bearing chert which is overlain by a sequence of intercallated clastic sedimentary rocks and mafic volcanics. The chert unit is underlain by a sequence of intermediate tuffs. All of the rock units strike NE-SW. The occurrence is located in a flexure in the strike of the rock units. Anomalous silver values occur in a thin wedge of pyrrhotite and pyrite bearing chert. A grab sample returned assay of 0.18 oz/ton Ag.
| Rock Type | Rank | Composition | Texture | Relationship | Chert | 1 | Graphitic Chert | Sulphidic | Host |
|---|---|---|---|---|
| Intermediate Tuff | 2 | Tuffs | Footwall | |
| Mafic lava flow-unsubdivided | 3 | Adjacent |
Dec 07, 2005 (K R Kettles) - The occurrence is located in a thin unit of sulphide bearing chert which is overlain by a sequence of intercallated clastic sedimentary rocks and mafic volcanics. The chert unit is underlain by a sequence of intermediate tuffs. All of the rock units strike NE-SW. The occurrence is located in a flexure in the strike of the rock units. Anomalous silver values occur in a thin wedge of pyrrhotite and pyrite bearing chert. A grab sample returned assay of 0.18 oz/ton Ag.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Silver | Economic | Ore | ||||
| 2 | Gold | Economic | Ore | ||||
| 3 | Pyrrhotite | Economic | Ore | ||||
| 4 | Pyrite | Economic | Ore | ||||
| 1 | Chert | Economic | Gangue |
Dec 07, 2005 (K R Kettles) - The occurrence is located in a thin unit of sulphide bearing chert which is overlain by a sequence of intercallated clastic sedimentary rocks and mafic volcanics. The chert unit is underlain by a sequence of intermediate tuffs. All of the rock units strike NE-SW. The occurrence is located in a flexure in the strike of the rock units. Anomalous silver values occur in a thin wedge of pyrrhotite and pyrite bearing chert. A grab sample returned assay of 0.18 oz/ton Ag.
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
Mono - Gold occurrences, prospects, and deposits of the Red Lake area, volumes 1 and 2
Publication Number: OFR5558 Scale: Date: 1987
Author: Durocher M.E., Burchell P.S., Andrews A.J.
Publisher Name: Ontario Geological Survey
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