Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI42F05SE00011

Record: MDI42F05SE00011

General

Commodities

Primary Commodities: Sulphur/Pyrite

Location

Township or Area: Olie Lake Area

Latitude: 49° 18' 59.45"    Longitude: -85° 41' 3.21"

UTM Zone: 16    Easting: 595626.58   Northing: 5463474.9    UTM Datum: NAD83

Resident Geologist District: Thunder Bay South

NTS Grid: 42F05SE

Point Location Description: Roadside outcrop

Location Method: Field Visit with GPS

Access Description: The Husak Road No. 4 sulphide occurrence is located approximately 23 km north-northeast of Manitouwadge and 500 m west-northwest of the north end of Gracie Lake. Recent logging operations have removed most of the trees in this area. As a consequence, the occurrence is well exposed and readily accessed. The occurrence is accessible via motor vehicle. From Manitouwadge, travel east and then north along the Camp 70 logging road for approximately 31.5 km to the Jim Lake road. Proceed north along the Jim Lake road for approximately 7.85 km to the Husak road. Proceed west along the Husak road for approximately 3.7 km to a point 300 m east of the Thomas Lake road intersection. A prominent, rusty gossan and associated sulphides are exposed in the recently cut-over, scarified area approximately 10 m south of the Husak road.

Exploration History

1989: Lithogeochemical sampling; M. Smyk (OGS). Dighem 1989: Noranda Exploration Company Ltd. - airborne geophysical survey. 1991-1992: Reconnaissance till sampling survey; GSC. Samples collected in the vicinity of the occurrence contained unusually high amounts of Ni and slightly anomalous amounts of Au, Cu and Zn. 1993: The occurrence was examined, but not sampled, by D.B. McKay for the OGS.

Geology

Province: Superior

Subprovince: Quetico

Geological Age: Archean  

Metamorphism Type: Regional

Metamorphism Grade: Granulite

Geology Comments

Apr 14, 2014 (D McKay) - The Husak Road No. 4 sulphide occurrence is located within the Quetico Subprovince approximately 5 km north of the Quetico-Wawa subprovince boundary (Williams and Breaks 1990). The rocks in the vicinity of the occurrence are moderately to locally strongly foliated (100 º/subvertical). Mineral assemblages indicate the rocks have experienced upper amphibolite and locally granulite facies-grade regional metamorphism (Williams and Breaks 1990). An east-trending, regional scale, linear topographic feature referred to as the Little Nama Lake lineament (Coates 1968, Map 2141) is located approximately 1.6 km south of the occurrence. The occurrence is underlain primarily by an east-trending sequence of locally schistose, migmatitic paragneiss.

Lithology

Lithology Comments

Apr 14, 2014 (D McKay) - The paragneiss is generally light tan- to rusty-weathering, speckled black and white, medium- to coarse-grained, moderately foliated, non-magnetic and crudely laminated. The paragneiss is composed primarily of biotite, quartz and feldspar. Small (1 to 3 mm across) porphyroblasts of purple garnet and dark brown orthopyroxene occur locally. Intrusion of granitic, tonalitic and pegmatitic material into the paragneiss has resulted in the development of locallized lit-par-lit structures. The occurrence consists of up to 5% fine- to medium-grained, disseminated, subhedral grains of pyrite localized along the sheared margins of a 50 cm wide, foliation- parallel (100 degrees/subvertical), quartz-feldspar pegmatite dike hosted within migmatitic, biotite-quartz-feldspar paragneiss. The sulphides extend for approximately 50 cm on either side of the dike and can be traced along strike for approximately 10 m. A prominent, rusty gossan overlies the zone of sulphide mineralization.

Mineralization

Mineralization Comments

Dec 07, 2005 (D McKay) - The occurrence consists of up to 5% fine- to medium-grained, disseminated, subhedral grains of pyrite localized along the sheared margins of a 50 cm wide, foliation- parallel (100 degrees/subvertical), quartz-feldspar pegmatite dike hosted within migmatitic, biotite-quartz-feldspar paragneiss. The sulphides extend for approximately 50 cm on either side of the dike and can be traced along strike for approximately 10 m. A prominent, rusty gossan overlies the zone of sulphide mineralization. A grab sample of pyritic, rusty-weathering, coarse-grained, strongly foliated, weakly magnetic, biotite-quartz-feldspar paragneiss collected from the occurrence in 1992 by D.B. McKay for the OGS returned assay values of trace Au, nil Ag, 261 ppm Cu, 103 ppm Zn, and <10 ppm Pb.

Mineral Record Details

References

File - Schreiber-Hemlo Resident Geologist Mineral Deposit Files, Thunder Bay office

Publication Number: Min Dep Date:

Author:

Publisher Name:

Location: Thunder Bay RGP

Map - Geology of the Manitouwadge-Hornepayne area

Publication Number: OFM0142 Scale: 1:50,000    Date: 1990

Author: Williams H.R., Breaks F.W.

Publisher Name: Ontario Geological Survey

Location:

Map - Stevens sheet, Thunder Bay District

Publication Number: M2141 Scale: 1:63,360    Date: 1967

Author: Coates M.E.

Publisher Name: Ontario Dept. of Mines

Location:

Mono - Mineral Occurrences in the Manitouwadge Area, Volumes 1, 2 and 3

Publication Number: OFR5906 Page: 433-436  Date: 1994

Author: McKay D.B.

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