Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI52B14SW00046

Record: MDI52B14SW00046

General

Mineral Record Identification
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

Commodities

Primary Commodities: Gold, Silver

Secondary Commodities: Copper, Zinc, Lead



Location

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.



Exploration History

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.


Assessment Work on File

Assessment Work on File
Office File Number Online Assessment File Identifier Online Assessment File Directory
2.10993 52G03SE0032 52G03SE0032

Geology

Province: Superior

Subprovince: Wabigoon

Geological Age: Archean  



Mineralization

Mineralization and Alteration
Rank Mineral Name Class Economic Mineral Type Alteration Mineral Type Alteration Ranking Alteration Intensity Alteration Style
1ChalcopyriteEconomicOre
2GalenaEconomicOre
3GoldEconomicOre
4PyriteEconomicOre
5PyrrhotiteEconomicOre
6SphaleriteEconomicOre
7ArsenopyriteEconomicOre
8SericiteEconomicGangue
9CarbonateEconomicGangue
10MuscoviteEconomicGangue
11ChloriteEconomicGangue
12TourmalineEconomicGangue

Mineralization Comments

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).



Mineral Record Details

Classification
RankClassification            
1 Lode (Gold)
1 Vein
Characteristics
Rank Characteristic            
1 Sheared

References

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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For detailed information regarding this mineral record please contact the Thunder Bay South Resident Geologist District Office