Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI52B12NW00004

Record: MDI52B12NW00004

General

Commodities

Primary Commodities: Copper, Gold

Secondary Commodities: Silver

Location

Township or Area: Factor Lake Area, McOuat Lake Area

Latitude: 48° 44' 49.67"    Longitude: -92° 0' 8.85"

UTM Zone: 15    Easting: 573331   Northing: 5399826    UTM Datum: NAD83

Resident Geologist District: Thunder Bay South

NTS Grid: 52B12NW, 52B13SW, 52C09NE, 52C16SE

Point Location Description: Pit location from map in Assessment report 52B12NW0001

Location Method: Data Compilation

Exploration History

1925: Tanton reported Mr. Law found the original gold-chalcopyrite occurrence. 1929: Law Syndicate conducted prospecting, stripping, and trenching. 1956: Moneta Porcupine Mines conducted geological mapping and ground EM surveys. 1960: J. Heilman drilled 2 DDH totalling 64.6 m. 1966: Cominco also carried out geological and geophysical surveys, and 150 m of drilling. 1982: Phantom Exploration conducted a property visit for Strike Exploration Ltd. 1987: M. Stewardson carried out sampling. 1988: Blue Regal Resources conducted a magnetic survey, geological mapping, and drilled 4 DDH totalling 655.6 m.

Assessment Work on File

Geology

Province: Superior

Subprovince: Wabigoon

Geological Age: Archean  

Lithology

Lithology Comments

Sep 15, 2020 (Therese Pettigrew) - "The sulphide showings occur within mafic metavolcanics in the core of a large near vertical fold. The form of this fold has been complicated by extensive faulting and some of the minor shear zones are associated with the mineralization. Minor bands of intermediate to felsic metavolcanic tuffs are interlaminated with the mafic to intermediate metavolcanics. These metavolcanic rocks are intruded by a number of coarse-grained metavolcanic and gabbroic dykes. In the northern group of trenches near Wright Lake, the host rocks consist of compositionally banded and homogeneous tuffs which are strongly foliated or sheared parallel to the banding where present (Fumerton, 1980).

Mineralization

Mineralization Comments

Sep 15, 2020 (Therese Pettigrew) - The principal showing is in the vicinity of the old shaft. This is a sulphide replacement zone striking about N 45 W. It is exposed in 2 trenches about 25” apart. Actually, the zone consists of 2 parts, a southwest band which is not exposed but which the shaft was sunk in and a northeast band about 7 feet in width containing considerable fine-grained chalcopyrite (copper content estimated at 1%). Judging by the dump, the shaft went down on a zone containing heavy pyrite and pyrrhotite mineralization with little or no chalcopyrite. The two bands of sulphides are separated by 16 feet of practically unmineralized greenstone. The north-south shear zones do not contain enough copper to be of interest. Mainly the chalcopyrite mineralization is in quartz stringers (Schnieders and Dutka, 1985). Quartz veins mineralized with chalcopyrite and pyrite are parallel to the foliation but discontinuous and up to 25 centimetres thick. The total sulphide concentrations range from between trace amounts to 2 percent. The veins form up to 40 percent of the rock in bands up to 1 metre wide, and these bands in turn are widely spaced (72 metres). In the southern group of trenches, west of Law Lake, some sparsely disseminated pyrite, pyrrhotite and trace amounts of chalcopyrite occur in bands of highly sheared and altered rock. These shear zones are up to 3 metres thick and have some thin unmineralized quartz veins (< 2 centimetres) that parallel the shear zones. Abundant disseminated carbonate occurs throughout these shear zones. Laterally, the shear zones grade into fine-grain basalts (Fumerton, 1980). Samples taken by Phantom Exploration Ltd. in 1981 returned up to 0.02 oz/t Au, 0.15 oz/t Ag, and 4.5% Cu (Schnieders and Dutka, 1985). In 1987, M. Stewardson collected 10 grab samples which returned 0.04 oz/t Au from a mineralized quartz vein, 0.03 oz/t Au from a quartz vein with up to 20% sulphides, and 0.3 oz/t Au in massive pyrite (70%) containing siliceous fragments (Assessment report 52B13SW0011).

Mineral Record Details

References

Mono - Property visits and reports of the Atikokan economic geologist, 1979-1983, Atikokan geological survey

Publication Number: OFR5539 Page: 298-299  Date: 1985

Author: Schnieders B.R., Dutka R.J.

Publisher Name: Ontario Geological Survey

Location:

Part - Geology and ore deposits of the Atikokan area

Publication Number: ARV48-02.001 Page: 31-32  Date: 1997

Author: Moore E.S.

Publisher Name: Ontario Dept. of Mines

Location:

Part - Geology of the Sapawe Lake area, with notes on some iron and gold deposits of Rainy River District

Publication Number: ARV38-06.001 Page: 49-51  Date: 1998

Author: Hawley J.E.

Publisher Name: Ontario Dept. of Mines

Location:

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