Ontario Mineral Inventory

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Ontario Geological Survey
Permanent Link to this Record: MDI52O04NE00018

Record: MDI52O04NE00018

General

Mineral Record Identification
Record Name(s)	Island-North Bamaji Lake - 1972, Wesleyan Lake # 8 - 1983
Related Record Type	Simple
Related Record(s)
Record Status	Occurrence
Date Created	1983-Dec-29
Date Last Modified	2022-Sep-27
Created By
Revised By

Commodities

Primary Commodities: Molybdenum

Location

Township or Area: Wesleyan Lake Area

Latitude: 51° 9' 5.36" Longitude: -91° 34' 10.96"

UTM Zone: 15 Easting: 600033.528 Northing: 5667643.879 UTM Datum: NAD83

Resident Geologist District: Thunder Bay North

NTS Grid: 52O04NE

Point Location Description: Outcrop

Location Method: Conversion from MDI

Access Description: The Island-North Bamaji Lake occurrence is located about 100 km west-southwest of Pickle Lake and about 1.5 km southeast of the First Nation community of Slate Falls. It is on the north shore of an island in the central part of North Bamaji Lake. Access to this occurrence is by appropriately equipped aircraft to North Bamaji Lake. A winter road along the Ear Falls to Pickle Lake power corridor passes about 1.2 km north of this occurrence.

Exploration History

This occurrence was discovered by an OGS mapping party in 1972. Claims may have covered this occurrence in the 1960s, but there is no mention of it in the assessment files.

Assessment Work on File

Assessment Work on File
Office File Number	Online Assessment File Identifier	Online Assessment File Directory
52O04NE-0020	52O04NE0026	52O04NE0026

Geology

Province: Superior

Subprovince: Uchi

Terrane: North Caribou

Domain: Uchi

Belt: Meen-Dempster

Geological Age: Archean

Geology Comments

Dec 07, 2005 (B Nelson) - In the east-central section of North Bamaji Lake, approximately 1.5 km southeast of Slate Falls, a small island contains mineralized quartz veins typical of the Bamaji Lake complex. Very fine-grained molybdenite, accompanied locally with fine-grained purple fluorite and pyrite, occurs within a medium- to coarse-grained quartz veinlet less than 25 cm in width. Borders of the vein consist of sheared sericitic masses and concentration of pale, whitish feldspar. Malachite and very sparse azurite staining was noted in the veins. Each of the mineralized components constitute less than one percent of the vein. (from Sage and Breaks, 1982).

Lithology

Lithology Data
Rock Type	Rank	Composition	Texture	Relationship
Tonalite	1	Trondhjemite		Host

Lithology Comments

Dec 07, 2005 (B Nelson) - Mineralization occurs in Trondhjemite.

Mineralization

Mineralization and Alteration
Rank	Mineral Name	Class	Economic Mineral Type	Alteration Mineral Type	Alteration Ranking
1	Azurite	Economic	Ore
2	Fluorite	Economic	Ore
3	Molybdenite	Economic	Ore
4	Malachite	Economic	Ore
5	Pyrite	Economic	Ore
1	Quartz	Economic	Gangue
	Sericite	Alteration		Unknown	1
	Malachite	Alteration		Unknown	2
	Azurite	Alteration		Unknown	3

Mineralization Comments

Dec 07, 2005 (B Nelson) - Sage and Breaks (1982) report that a grab sample contained 1.4% Mo, 1.0 to 2.0% F and traces of Bi.

Mineral Record Details

Classification
Rank	Classification
1	Porphyry

Characteristics
Rank	Characteristic
1	Vein

References

Map - Cat Lake-Pickle Lake, geological compilation series, Kenora and Thunder Bay districts

Publication Number: M2218 Scale: 1:253,440 Date: 1976

Author: Sage R.P., Breaks F.W., Troup W.R.

Publisher Name: Ontario Division of Mines

Location:

Map - Wesleyan Lake, Kenora District

Publication Number: M2481 Scale: 1:31,680 Date: 1983

Author: Wallace H.