Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI41J05SW00055

Record: MDI41J05SW00055

General

Commodities

Primary Commodities: Copper

Secondary Commodities: Gold

Location

Township or Area: Plummer Additional

Latitude: 46° 21' 36.1"    Longitude: -83° 46' 52.75"

UTM Zone: 17    Easting: 286040.999   Northing: 5137810.002    UTM Datum: NAD83

Resident Geologist District: Sault Ste. Marie

NTS Grid: 41J05SW

Point Location Description: pit

Location Method: AMIS Site Visit

Access Description: West of Bruce Mines on highway 17. Take Centre Line Road going to the north. Drive 4.9km, turn right on Government Road. Drive 1.75km, turn left on Caribou Road. Drive 1.95km, turn right on Matheson Road. Drive 700m, pit 1 is right beside road.

Exploration History

1949: R.N. Bond (Algo-Bruce Mines) - trenching, 2 DD 1955-56: Bruce-Presto Mines Ltd. - DD-21-7126 ft., mapping, geochemistry, airborne geophysics, ground geophysics. 1956: Sylvanite Gold Mines Ltd. - property description. 1962: EM survey by Bannockburn Exploration and Mining Co. Ltd.

Assessment Work on File

Geology

Province: Southern

Subprovince: Cobalt Basin

Supergroup: Huronian Supergroup

Geological Age: Paleoproterozoic  

Lithology

Lithology Comments

Jun 25, 2010 (A Wilson) - The occurrence is described as occurring within a fine-grained felsitic rock (quartz diorite) that intrudes the Gowganda Fm. The bedrock trends 110° to the NW have been brecciated by an east-west trending fault. The quartz diorite has been brecciated and cemented by carbonates and quartz.

Mineralization

Mineralization Comments

Jun 25, 2010 (A Wilson) - In 1956, Sylvanite estimated that the showing measured 150 in width and 30-40 feet in length (east-west direction). The chalcopyrite occurs as disseminated blebs in the quartz and carbonate cement, as well as within the brecciated host rock. Grab samples of this material reportedly returned values ranging from 2.0% - 5.5% Cu (Bruce Presto Mines Ltd.). Bruce Presto tested the ore zone with 11 vertical drill holes 200 feet deep drilled on a grid of 50 foot centres. The breccia zone has a width of 80-100 feet true width and averaged about 0.25% Cu. The quartz-carbonate brecciated and altered rock was found to be widespread and extensive mineralized by minor amounts of chalcopyrite and pyrite. Although numerous ore-grade intersections in the same zone were obtained, these could not be correlated and are considered to be small pods of better grade material in a very low-grade mineralized zone. Typical assays from the Bruce Presto drilling returned values ranging from 0.03 to 2.53% Cu over 5 feet. The quartz diabase and quartzite fragments are mineralized, and the chalcopyrite occurs are plates and veinlets within the fragments. Chip samples collected by C. Huston in 1949 averaged 1.29% Cu. The best gold values from these chip samples returned 0.005 and 0.01 oz/t gold.

Mineral Record Details

References

Map - Geological compilation series, Sault Ste. Marie sheet, District of Algoma

Publication Number: P0303 Scale: 1:126,720    Date: 1997

Author: Giblin P.E., Leahy E.J.

Publisher Name: Ontario Geological Survey

Location:

Mono - Copper, nickel, lead and zinc deposits of Ontario

Publication Number: MDC012 Page: 52  Date: 1969

Author: Shklanka R.

Publisher Name: Ontario Dept. of Mines

Location:

Map - Sault Ste. Marie-Elliot Lake, geological compilation series, Algoma, Manitoulin and Sudbury districts

Publication Number: M2419 Scale: 1:253,440    Date: 1979

Author: Giblin P.E., Leahy E.J.

Publisher Name: Ontario Geological Survey

Location:

Publication - Canadian Mineral Deposits Not Being Mined In 1989

Publication Number: MR 223 Date: 1989

Author:

Publisher Name: Energy Mines and Resources Canada

Location:

Map - Geology, Bruce Mines-Lake George area, District of Algoma, Ontario

Publication Number: Map 1414A Scale: 1:50,000    Date: 1978

Author: Frarey, M J

Publisher Name: Geological Survey of Canada

Location: https://doi.org/10.4095/109095

Publication - Copper metallogeny, north shore region of Lake Huron, Ontario; Current research part A; by Geological Survey of Canada; Geological Survey of Canada, Paper no. 79-1A

Publication Number: Paper 79-1A Page: 290  Date: 1979

Author: Pearson, W.N.

Publisher Name: Geological Survey of Canada

Location: https://doi.org/10.4095/104860

Publication - Copper deposits and occurrences in the north shore region of Lake Huron, Ontario

Publication Number: Paper 83-28 Page: 25  Date: 1985

Author: Pearson, W N; Bretzlaff, R E; Carrière, J J

Publisher Name: Geological Survey of Canada

Location: https://doi.org/10.4095/120312

Mono - Copper, nickel, lead and zinc deposits in Ontario (revised to February, 1957)

Publication Number: MDC002 Page: 73  Date: 1957

Author: Thomson J.E., Ferguson S.A., Johnston W.G.Q., Pye E.G., Savage W.S., Thomson R.

Publisher Name: Ontario Dept. of Mines

Location:

Publication - Sudbury Timmins Algoma Mineral Program, Project 1: mineral inventory of the Sudbury-Timmins-Sault Ste. Marie region, Ontario

Publication Number: GSC OF 1087 Page: 73  Date: 1985

Author: Rose, D.G.

Publisher Name: Geological Survey of Canada

Location: https://doi.org/10.4095/129999

Publication - Geology of the Huronian belt between Sault Ste Marie and Blind River Ontario; Geological Survey of Canada, Memoir 383

Publication Number: GSC Memoir 383 Page: 72-73  Date: 1978

Author: Frarey, M.J.

Publisher Name: Geological Survey of Canada

Location: https://doi.org/10.4095/104548

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For detailed information regarding this mineral record please contact the Sault Ste. Marie Resident Geologist District Office