Ontario Geological Survey
Permanent Link to this Record:
MDI42E03NW00010
| Record Name(s) | Greenhedge Lake Fault Occurrence - 1991, Greenhedge-Southpine - 1991 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Discretionary Occurrence |
| Date Created | 1991-Apr-01 |
| Date Last Modified | 2022-May-09 |
| Created By | |
| Revised By |
Primary Commodities: Copper
Secondary Commodities: Zinc, Silver
Township or Area: Dickison Lake Area
Latitude: 49° 9' 13.95" Longitude: -87° 26' 22.25"
UTM Zone: 16 Easting: 467951.99 Northing: 5444654.64 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 42E03NW
Point Location Description: Trench
Location Method: Field Visit
Access Description: The occurrence is located 2.4 km southwest of Dickison Lake along the Greenhedge Lake-Southpine Lake fault. A trench is found 45 m northwest of a small lake on the west side of the creek (claim map G-31). Access is via aircraft to Greenhedge Lake or Dickison Lake. Alternate access to Dickison Lake is also attained by old logging trails from the Kimberly Clark road.
1928: The area surrounding the occurrence was staked but no work was recorded. 1931: Prospecting; Canada Gold Ventures Syndicate. 1954: Geological investigation; 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. 1991: R. Michon conducted prospecting and sampling.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| OP91-718 | 42F13SW0009 | 42F13SW0009 |
Province: Superior
Subprovince: Quetico
Geological Age: Archean
Dec 07, 2005 (D McKay) - The showing is located within a 0.5 m by 4.5 m trench. The host rocks consist of metasedimentary rocks intruded by granite and pegmatite. The chalcopyrite-malachite bearing calcite veinlets (up to 1.25 cm) parallel the Greenhedge Lake fault (310 degrees).
| Rock Type | Rank | Composition | Texture | Relationship | Granite | 1 | Near |
|---|---|---|---|---|
| Pegmatite | 2 | Near | ||
| Sandstone | 3 | Unspecified Sedimentary Rocks | Host | |
| Vein | 4 | Calcite Veinlets | Host | |
| Schist-Unsubdivided | 5 | Sericitic | Host |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Chalcopyrite | Economic | Ore | ||||
| 2 | Malachite | Economic | Ore | ||||
| 3 | Pyrite | Economic | Ore | ||||
| 1 | Calcite | Economic | Gangue | ||||
| Calcite | Alteration | Hydrothermal | 1 | Unknown | Veins |
Dec 07, 2005 (D McKay) - Bartley (1954) described the mineralogy: ...small masses and disseminations of chalcopyrite occur with pyrite in a sericite schist accompanied by carbonate. Bright green copper oxidation stains the rock surface. Grab samples collected from the occurrence in 1984 by OGS Resident Geologist staff returned assay values which varied from <0.01 to <0.01 opt Au, <0.01 to 0.10 opt Ag and 52 to 184 ppm Cu.
Sep 27, 2019 (Therese Pettigrew) - Sample 8-1 collected by prospector R. Reukl in 1991 returned an assay of 0.18% Cu, 0.04% Zn, and 0.07 opt Ag (2.40 g/t Ag) from a shear zone with chloritic and sericitic quartz veinlets containing 1-2% chalcopyrite (Assessment report 42F13SW0009).
Book - DICKISON LAKE AREA, UNPUBLISHED RPT, 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:
Mono - Mineral Occurrences in the Nipigon-Marathon Area, Volumes 1 and 2.
Publication Number: OFR5951 Date: 1996
Author: Schnieders B.R., Smyk M.C., Speed A.A., McKay D.B.
Publisher Name: Ontario Geological Survey
Location:
File - 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:
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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