Ontario Geological Survey
Permanent Link to this Record:
MDI42E03NW00011
| Record Name(s) | Greenhedge Lake Copper Occurrence - 1970 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1991-Apr-01 |
| Date Last Modified | 2022-May-09 |
| Created By | |
| Revised By |
Primary Commodities: Silver
Secondary Commodities: Copper
Township or Area: Dickison Lake Area
Latitude: 49° 7' 55.82" Longitude: -87° 23' 48.58"
UTM Zone: 16 Easting: 471051.95 Northing: 5442224.63 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 42E03NW
Point Location Description: Rusty gossanous outcrop
Location Method: Field Visit
Access Description: The occurrence is located on the southeast bay of Greenhedge Lake approximately 40 km north of Schreiber (claim map G-31). Access is by aircraft to Greenhedge Lake. Alternate access is by portaging from Dickison Lake into Greenhedge Lake.
1928: The area was staked, but no work recorded. 1931: Prospecting and claim staking; Canada Gold Ventures Syndicate. 1954: Geological examination; M.W. Bartley for the C.P.R. 1970: Geological mapping; M.W. Carter (ODM). 1983-1987: Prospecting; N. Hibbart, J. Marcella, D. McCullough and others. 1984: Property examination and lithogeochemical sampling; OGS Resident Geologist staff. No assessment records were found on file.
Province: Superior
Subprovince: Quetico
Geological Age: Archean
Dec 07, 2005 (D McKay) - Carter (1975, p.22) described the occurrence as follows: This occurrence consists of disseminated chalcopyrite in the biotite bands of biotite-quartz-feldspar schist. The occurrence is in a 6 inch wide shear associated with the Greenhedge Lake-Southpine Lake Fault. The shear is in migmatite that consists of schist and gneiss and granite-pegmatite. The chalcopyrite amounts to about 1 percent in the biotite bands.
| Rock Type | Rank | Composition | Texture | Relationship | Schist-Unsubdivided | 1 | Bio-Q-Fel Schist (Metased) | Host |
|---|
Dec 07, 2005 (D McKay) - Schnieders et al. (1996) state: Metasedimentary rocks rich in biotite were observed in the immediate area.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Chalcopyrite | Economic | Ore |
Dec 07, 2005 (D McKay) - The occurrence consists of disseminated chalcopyrite in the biotite bands of biotite-quartz- feldspar schist. The chalcopyrite amounts to about 1 percent in the biotite bands. A grab sample collected from the occurrence in 1984 by OGS Resident Geologist staff returned assay values of nil Au, 1.80 opt Ag and 99 ppm Cu.
File - Schreiber-Hemlo Resident Geologist Mineral Deposit Files
Publication Number: Min Dep Date:
Author:
Publisher Name:
Location: Thunder Bay RGP
Map - Nipigon-Schreiber, geological compilation series, Thunder Bay District
Publication Number: M2232 Scale: 1:253,440 Date: 1973
Author: Carter M.W., McIlwaine W.H., Wisbey P.A.
Publisher Name: Ontario Division of Mines
Location:
Mono - Mineral Occurrences in the Nipigon-Marathon Area, Volumes 1 and 2.
Publication Number: OFR5951 Page: 766-767 Date: 1996
Author: Schnieders B.R., Smyk M.C., Speed A.A., McKay D.B.
Publisher Name: Ontario Geological Survey
Location:
Book - Dickison Lake Area, Unpublished Report, C.P.R. Development Section, 10p
Publication Number: CPR RPT Date: 1955
Author: Bartley, M.W.
Publisher Name:
Location: Thunder Bay RGP
Map - Dickison Lake, Thunder Bay District
Publication Number: M2293 Scale: 1:63,360 Date: 1974
Author: Carter M.W.
Publisher Name: Ontario Division of Mines
Location:
MonoMap - Geology of the Dickison Lake area, District of Thunder Bay
Publication Number: R123 Date: 1975
Author: Carter M.W.
Publisher Name: Ontario Division of Mines
Location:
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