Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI42E03SW00020

Record: MDI42E03SW00020

General

Commodities

Primary Commodities: Gold

Secondary Commodities: Copper, Zinc, Lead, Sulphur/Pyrite

Location

Township or Area: Rope Lake Area

Latitude: 49° 0' 37.71"    Longitude: -87° 17' 41.19"

UTM Zone: 16    Easting: 478444   Northing: 5428662.01    UTM Datum: NAD83

Resident Geologist District: Thunder Bay South

NTS Grid: 42E03SW

Point Location Description: Sample 237056 from Assessment report 20000008066

Location Method: Data Compilation

Access Description: The claims are located approximately 0.4 km north of the northwest bay of Big Duck Lake about 27 km north of Schreiber (claim map G-609). Access is via float plane or by drill trail from the Winston Lake Mine site to Big Duck Lake.

Exploration History

1913: Thirty days of unspecified work recorded on each of the claims TB 1861 and 1955; J. and A. Fisher. 1915: Blasting of an open cut (2.44 m deep and 7.32 m long) and extraction of 226.8 kg bulk sample; C. Sjolander, J. McKirdy and F.J. Anderson. The bulk sample was reportedly shipped to a smelter but no record of results exists. 1960: Diamond drilling (2 x-ray holes); KRNO. 1984-1988: Line cutting, geological mapping and lithogeochemical sampling; Corporation Falconbridge Copper. 2013: Clear Gold Resources Inc. carried out prospecting and sampling.

Assessment Work on File

Geology

Province: Superior

Subprovince: Wawa

Terrane: Wawa-Abitibi

Belt: Schreiber-Hemlo

Geological Age: Archean  

Geology Comments

Dec 07, 2005 (D McKay) - Hopkins (1922 pp.20-21) describes the occurrence as follows: The Sjolander-McKirdy deposit, which lies 70 chains (1.4 km) to the northeast of the McQuaig is in a hornblende schist which retains faint pillow structures and is distant about 800 feet (244 m) to the north of a large quartz porphyry outcrop. The deposit strikes south 70 west and dips 75 to the north, coinciding with the strike and dip of the country rocks. The vein has not been traced continuously for any great distance. Near the east part of TB 1861 an open cut eight feet (2.4 m) deep has been blasted for 24 feet (7.3 m) across the entire width of the deposit. Assays of channel samples taken in sections across this open cut indicate favourable values in gold across seven feet (2.1 m) near the hanging wall part. Considerable gold in a state of fine division occurs about five feet (1.5 m) from the hanging wall. Much pyrite, some galena, zinc blende and chalcopyrite are disseminated throughout the calcite-quartz-schist vein. A thin section of the gold-bearing material shows interlocking quartz and calcite grains with gold and pyrite, closely associated, lying between the grains. In the early part of 1915, 500 pounds (226.8) kg of the vein matter were shipped to a smelter. A vein on the east claim, TB 1955 contains molybdenite.

Lithology

Mineralization

Mineralization Comments

Dec 07, 2005 (D McKay) - Hopkins (1922) states: Considerable gold in a state of fine division occurs about five feet (1.5 m) from the hanging wall. Much pyrite, some galena, zinc blende and chalcopyrite are disseminated throughout the calcite-quartz-schist vein. A thin section of the gold-bearing material shows interlocking quartz and calcite grains with gold and pyrite, closely associated, lying between the grains. A grab sample collected from the occurrence by M. Bartley in the early 1940's reportedly assayed 0.07 opt Au (Bartley 1942, pp.8-9).

Jun 14, 2019 (Therese Pettigrew) - Sample 237056 collected by Clear Gold in 2013 returned an assay of 4167 ppm Zn (Assessment file 20000008066).

Mineral Record Details

References

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 - Mineral deposits of the Big Duck Lake area, District of Thunder Bay

Publication Number: R027 Page: 38  Date: 1997

Author: Pye E.G.

Publisher Name: Ontario Dept. of Mines

Location:

Part - Statistical review of the mineral industry of Ontario for 1914

Publication Number: ARV24-01.001 Page: 9-13  Date: 1998

Author: Gibson T.W.

Publisher Name: Ontario Bureau of Mines

Location:

Map - Big Duck Lake area, District of Thunder Bay

Publication Number: M2023 Scale: 1:15,840    Date: 1997

Author: Pye E.G.

Publisher Name: Ontario Dept. of Mines

Location:

Mono - Mineral Occurrences in the Nipigon-Marathon Area, Volumes 1 and 2.

Publication Number: OFR5951 Page: 791-794  Date: 1996

Author: Schnieders B.R., Smyk M.C., Speed A.A., McKay D.B.

Publisher Name: Ontario Geological Survey

Location:

Part - Schreiber-Duck Lake area

Publication Number: ARV30-04.001 Date: 1998

Author: Hopkins P.E.

Publisher Name: Ontario Dept. of Mines

Location:

Part - Geology of the Big Duck-Aguasabon lakes area

Publication Number: ARV49-07.001 Page: 1-11  Date: 1998

Author: Bartley M.W.

Publisher Name: Ontario Dept. of Mines

Location:

File - Schreiber-Hemlo Resident Geologist Mineral Deposit Files

Publication Number: Min Dep Date:

Author:

Publisher Name:

Location: Thunder Bay RGP

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