Ontario Geological Survey
Permanent Link to this Record:
MDI53J01SW00002
| Record Name(s) | Derniere Lake - 1962 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Discretionary Occurrence |
| Date Created | 1991-Jan-20 |
| Date Last Modified | 2022-Mar-02 |
| Created By | |
| Revised By |
Primary Commodities: Copper, Nickel
Secondary Commodities: Zinc, Gold
Township or Area: Derniere Lake Area
Latitude: 54° 3' 41.71" Longitude: -90° 16' .67"
UTM Zone: 15 Easting: 678871 Northing: 5993829 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 53J01SW
Point Location Description: From OGS map M2045
Location Method: Data Compilation
1962: Phelps Dodge Corporation of Canada Ltd. staked the showing and carried out “pack sack” drilling. 1975: Great Plains Development Co. of Canada Ltd. drilled 2 DDH totalling 309.7 m northwest of the showing, in similar rock types.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 10 | 53J01SW8147 | 53J01SW8147 |
Province: Superior
Subprovince: Sachigo
Terrane: North Caribou
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Breccia-unsubdivided | 1 | Brecciated Mafic Metavolcanics | Host |
|---|---|---|---|---|
| Mafic lava flow-unsubdivided | 2 | |||
| Granitoid-Unsubdivided | 3 |
Aug 15, 2019 (Therese Pettigrew) - The massive sulphides are found in a brecciated volcanic rock, and the disseminated mineralization is found in banded tuffs or sedimentary rocks. A granite contact is indicated within 500 feet north of the Derniere Lake showing and parallels the mineralized zone (Hudec, 1964).
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Ore | ||||
| 2 | Pyrrhotite | Economic | Ore | ||||
| 3 | Chalcopyrite | Economic | Ore |
Aug 15, 2019 (Therese Pettigrew) - Hudec (1964) reported a mineralized zone at least 30 feet wide and 1000 feet long on the south shore of Derniere Lake about 5 miles southeast of Jackfish Lake. The zone is in brecciated mafic metavolcanics and contains disseminated to massive pyrrhotite and pyrite with minor chalcopyrite. A body, 3 feet wide, of massive pyrrhotite and pyrite occurs within the zone. It is visible only at low water and probably forms a discontinuous lens within the mineralized zone. Samples collected for assay by Hudec contained only trace amounts of base metals. The holes drilled by Great Plains Exploration in 1975 assayed up to 0.03% Cu and 0.01% Ni (Assessment report 53J01SW8147).
Book - NMI 1975 53J01SW CU 2
Publication Number: N/A Scale: Date: 1996
Author:
Publisher Name:
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 Lingman Lake
Publication Number: MP027 Scale: Date: 1969
Author: Bennett G., Riley R.A.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Copper, nickel, lead and zinc deposits of Ontario
Publication Number: MDC012 Scale: Date: 1969
Author: Shklanka R.
Publisher Name: Ontario Dept. of Mines
Location:
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For detailed information regarding this mineral record please contact the Thunder Bay North Resident Geologist District Office