Ontario Geological Survey
Permanent Link to this Record:
MDI53H13SW00007
| Record Name(s) | Big Island - 1940 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1979-Dec-04 |
| Date Last Modified | 2022-Mar-02 |
| Created By | |
| Revised By |
Primary Commodities: Copper
Township or Area: Post Island Area
Latitude: 53° 46' 46.71" Longitude: -89° 57' 34.05"
UTM Zone: 16 Easting: 305012 Northing: 5963069 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 53H13SW
Point Location Description: Location of pit on map M2045
Location Method: Conversion from MDI
1912: Reconnaissance scale mapping by J.B. Tyrrell of the Geological Survey of Canada. 1940s: Consolidated Mining conducted 2DDH + trenching. 1964: Ontario Department of Mines reconnaissance scale mapping by P.P. Hudec. 1971: Ontario Geological Survey completed more detailed mapping by Thurston. As of 2009, this area has been alienated by the province and is not open for staking. No assessment files were found on record.
Province: Superior
Subprovince: Sachigo
Terrane: North Caribou
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Intermediate lava flow-unsubdivided | 1 |
|---|
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Ore | ||||
| 2 | Chalcopyrite | Economic | Ore | ||||
| 3 | Pyrrhotite | Economic | Ore |
Aug 16, 2018 (Therese Pettigrew) - Hudec (1964) observed hydrothermal replacement of volcanic rocks by sulphides containing minor copper on the southeast tip of Big Island in Big Trout Lake. Pits and two diamond-drillholes were put down years ago over the showing, but returned only scattered chalcopyrite mineralization with low copper assay values. The sulphides are principally pyrite and pyrrhotite, and are present as massive and disseminated replacement of the volcanic rocks. Two more chalcopyrite occurrences were found within 0.8 km of the above showing: a 2.5 cm-wide seam of chalcopyrite in the volcanic rocks, found on the south shore of Big Island; and, a pyrite-pyrrhotite-chalcopyrite replacement of the chill border of pillows, found on one of the small islands just off Big Island.
Map - Big Trout Lake area, Kenora District, Patricia Portion
Publication Number: M2045 Scale: 1:126,720 Date: 1997
Author: Hudec P.P.
Publisher Name: Ontario Dept. of Mines
Location:
MonoMap - Geology of the Big Trout Lake area, District of Kenora (Patricia Portion)
Publication Number: R023 Scale: Date: 1997
Author: Hudec P.P.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Operation Winisk Lake, District of Kenora, Patricia Portion
Publication Number: OFR5119 Scale: Date: 1975
Author: Thurston P.C., Sage R.P., Siragusa G.M.
Publisher Name: Ontario Division of Mines
Location:
MonoMap - Geology of Winisk Lake area, District of Kenora, Patricia Portion
Publication Number: R193 Scale: Date: 1980
Author: Thurston P.C., Sage R.P., Siragusa G.M.
Publisher Name: Ontario Geological Survey
Location:
We are continuously updating our assessment file / technical report information. If you notice errors in the data, please contact us.
Please review our Terms of Use agreement for this data product.
For detailed information regarding this mineral record please contact the Thunder Bay North Resident Geologist District Office