Ontario Geological Survey
Permanent Link to this Record:
MDI52B14SW00046
| Record Name(s) | Reserve Island - 1984, Adco Exploration - 1984, Burger - 9999 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1984-Feb-28 |
| Date Last Modified | 2022-Feb-23 |
| Created By | |
| Revised By |
Primary Commodities: Gold, Silver
Secondary Commodities: Copper, Zinc, Lead
Township or Area: Hutchinson
Latitude: 48° 50' 29.58" Longitude: -91° 19' 24.38"
UTM Zone: 15 Easting: 623014 Northing: 5411197.01 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 52B14SW
Point Location Description: Old Shaft
Location Method: Conversion from MDI
Access Description: Access from Highway 11, north on Highway 623 to Sapawe, then northeast along the Domtar Woodlands Road for approximately 4.8km. Turn left onto a public access road for a distance of 6km to a boat launch site on Marmion Lake. Access to Reserve Island is by boat.
1898: Test pits and trenches excavated. 1899: Shaft sunk to 63 feet; several buildings constructed. 1931: Optioned to Homestake Mining Company, shaft sunk to 70 feet, shaft 5 x 8 feet dimensions, lateral development at 60 feet, 50 feet crosscut. 1932: Property reverted back to F. Burger. 1983: G. Rawlings, Atikokan, conducted stripping and sampling.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.10993 | 52G03SE0032 | 52G03SE0032 |
Province: Superior
Subprovince: Wabigoon
Geological Age: Archean
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Chalcopyrite | Economic | Ore | ||||
| 2 | Galena | Economic | Ore | ||||
| 3 | Gold | Economic | Ore | ||||
| 4 | Pyrite | Economic | Ore | ||||
| 5 | Pyrrhotite | Economic | Ore | ||||
| 6 | Sphalerite | Economic | Ore | ||||
| 7 | Arsenopyrite | Economic | Ore | ||||
| 8 | Sericite | Economic | Gangue | ||||
| 9 | Carbonate | Economic | Gangue | ||||
| 10 | Muscovite | Economic | Gangue | ||||
| 11 | Chlorite | Economic | Gangue | ||||
| 12 | Tourmaline | Economic | Gangue |
Nov 27, 2015 (Therese Pettigrew) - The veins are composed of quartz with chlorite and some sulphides. The quartz encloses a mafic dyke in places and is enclosed in the same dike at other locations. In some pits the dyke is not present with the vein. The vein contains visible amounts of pyrite, galena, arsenopyrite, and visible gold. The veins are very similar in appearance to those that occur at the Sunbeam mine and are probably an extension of the same shear zone. Samples collected range from 0.030 g/t Au to 6.565 g/t Au (Wilkinson, 1982). MacRae (1978, p. 206) reports that the average grade is 7.89 g/t Au. Schnieders and Dutka (1985) collected samples that assayed 1.84 g/t Au, 4.62 g/t Au, 11.52 g/t Au, 10.06 g/t Au, 14.64 g/t Au, and 19.74 g/t Au. A quartz vein striking 225 degrees and dipping 55 degrees NW is hosted by a massive to locally foliated hornblende trondhjemite. The massive trondhjemite changes gradationally into a gneissic, medium- to coarse-grained trondhjemite. Associated with the quartz vein is a chlorite schist along the hanging wall contact of the vein. The chlorite schist may be an altered mafic dyke. The chlorite schist displays Carbonatization and appears as small remnants and seams within the vein. The vein with associated chlorite schist is hosted by a massive, hornblende trondhjemite. The trondhjemite is progressively altered and deformed with proximity to the mineralization. The quartz vein varies in width from 0.5 m to 3 m is continuously exposed along strike for over 100 m. The vein appears to pinch out at about 30 m SW of the shaft. The vein material is white, glassy quartz. Sections of the vein appear to be enriched with sulphide mineralization. SW of the shaft near massive sulphide mineralization is evident. Chalcopyrite, pyrite, pyrrhotite, galena, sphalerite and visible gold are present in the 15 cm wide zone. To the northeast of the shaft, erratic pyrite and galena mineralization is evident. Accessory minerals include sericite, carbonate, green chromium muscovite, chlorite, and possible tourmaline (Schnieders and Dutka, 1985).
| Rank | Classification |
|---|---|
| 1 | Lode (Gold) |
| 1 | Vein |
| Rank | Characteristic |
|---|---|
| 1 | Sheared |
Mono - Gold deposits of the Atikokan area
Publication Number: MDC024 Scale: Date: 1982
Author: Wilkinson S.
Publisher Name: Ontario Geological Survey
Location:
Mono - Property visits and reports of the Atikokan economic geologist, 1979-1983, Atikokan geological survey
Publication Number: OFR5539 Scale: Date: 1985
Author: Schnieders B.R., Dutka R.J.
Publisher Name: Ontario Geological Survey
Location:
Article - Mineral deposits of the Atikokan area
Publication Number: MP082.046 Scale: Date: 1997
Author: MacRae W.
Publisher Name: Ontario Geological Survey
Location:
Map - Atikokan-Lakehead sheet, geological compilation series, Kenora, Rainy River and Thunder Bay districts
Publication Number: M2065 Scale: 1:253,440 Date: 1997
Author: Pye E.G., Fenwick K.G.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Precambrian Geology, Sapawe Area
Publication Number: P3350 Scale: 1:50,000 Date: 1995
Author: Stone D., Pufahl P., Carter J.
Publisher Name: Ontario Geological Survey
Location:
Map - Geological series, Sapawe Lake area, east part, Rainy River District
Publication Number: P2388 Scale: 1:15,840 Date: 1981
Author: McIlwaine W.H., Larsen C.R.
Publisher Name: Ontario Geological Survey
Location:
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