Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI000000001920

Record: MDI000000001920

General

Commodities

Primary Commodities: Copper, Nickel, Platinum, Palladium

Location

Township or Area: Lac Des Iles Area, Shelby Lake Area

Latitude: 49° 7' 33.95"    Longitude: -89° 31' 51.19"

UTM Zone: 16    Easting: 315361   Northing: 5444558    UTM Datum: NAD83

Resident Geologist District: Thunder Bay South

NTS Grid: 52H04NE

Point Location Description: GPS point from N. Pettigrew

Location Method: Field Visit with GPS

Access Description: Access to the Legris Lake Property is obtained by travelling approximately 20 km east on Highway 11/17 from Thunder Bay, then 81 km north along provincial highway 527. From there, Fensom Road (gravel) leads to the claim group 16 km to the west. From kilometers 16 and 17 of Fensom Rd, trench and drill sites can be reached via a network of secondary and tertiary roads and access trails.

Exploration History

1999: prospector K. Fenwick discovered the Main Showing Zone. 1999-2002: Avalon Ventures Ltd. and Starcore Resources Ltd. optioned the property and conducted IP and magnetic geophysical surveys, geological mapping, geochemical surveys, trenching, sampling, and drilled 28 DDH totaling 4633 m. 2004: North American Palladium Ltd. (NAP) optioned the property and conducted prospecting and trenching. 2005: NAP drilled 3 DDH totaling 465 m and conducted airborne magnetic and VLF-EM surveys. Option was dropped and property returned to K. Fenwick. 2006: property was optioned by Abitibi Mining Corp. who conducted a ground magnetometer survey. 2010: Lac des Iles Mines Ltd. optioned the property, drilled 7 DDH totaling 3942.6 m, and conducted trenching. 2011: Lac des Iles conducted trenching and drilled 4 DDH totaling 2168 m.

Assessment Work on File

Geology

Province: Superior

Subprovince: Wabigoon

Geological Age: Archean  

Geology Comments

May 20, 2016 (Therese Pettigrew) - The Legris Lake property is situated within the Archean Wabigoon Subprovince of the Superior Structural Province. The Legris Lake Complex is part of a series of PGE-bearing mafic-ultramafic intrusions that form a circular pattern approximately 30 km in diameter commonly referred to as the "Ring of Fire". The series primarily intrude metasediments and metabasalts near the Wabigoon-Quetico Subprovince boundary. The series include the Lac des Iles Complex, Tib Lake, Towle Lake, Wakinoo Lake, Demers Lake, Taman Lake, Buck Lake, and Dog River intrusions. The Legris Lake Complex is intruded by late granodiorite dykes and quartz feldspar pegmatites part of larger granodiorite plutons forming the sanukatoid suite of rocks. The Legris Lake Complex has later been intruded by Proterozoic-age diabase dykes and sills (AFRI 20000000847).

Lithology

Mineralization

Mineralization Comments

May 20, 2016 (Therese Pettigrew) - Significant drill intercepts include: LL00-03ext from 223.92-228.60 m: 0.19 ppm Pd, 0.05 ppm Pt, 0.01 ppm Au, 0.02% Cu and 0.01% Ni LL00-03ext from 277.2-282.22 m: 0.27 ppm Pd, 0.05 ppm Pt, 0.03 ppm Au, 0.07% Cu and 0.05% Ni LL00-03ext from 284.37-287.82 m: 0.23 ppm Pd, 0.05 ppm Pt, 0.06 ppm Au, 0.01% Cu and 0.03% Ni LL00-03ext from 285.18-285.95 m: 0.91 ppm Pd, 0.19 ppm Pt, 0.02 ppm Au, 0.01% Cu and 0.07% Ni L01-15 from 138.42-139.54 m: 1.19 ppm Pd, 0.29 ppm Pt, 0.23 ppm Au, 0.44% Cu and 0.11% Ni L01-20 from 197.20-205.13 m: 1.18 ppm Pd, 0.24 ppm Pt, 0.20 ppm Au, 0.32% Cu and 0.09% Ni L01-20 from 231.46-233.27 m: 0.63 ppm Pd, 0.23 ppm Pt, 0.12 ppm Au, 0.13% Cu and 0.11% Ni L01-20 from 360.66-360.92 m: 0.90 ppm Pd, 0.27 ppm Pt, 0.03 ppm Au, 0.18% Cu and 0.41% Ni (AFRI 20000007467). The Main Showing Zone is a Cu-Pd-rich style of mineralization, which is the most common and highest grade style of mineralization in the area. It occurs in layered, sill-like structures. Within these sill-like bodies, the mineralization is confined to Main Showing subtype leucogabbro overlying medium-grained pyroxenite and local melanogabbro with a sharp to gradational (up to 30 cm wide) contact. The mineralization is characterized by disseminated to locally net-textured sulphides consisting of pyrite + chalcopyrite pyrrhotite millerite pentlandite ± magnetite. The sulphides are typically accompanied by coarse apatite crystals and surrounded by epidote alteration halos. The epidote alteration changes the colour of the mineralized leucogabbro from white to dark green in hand sample (AFRI 52H03NW2008).

Mineral Record Details

References

Map - Precambrian Geology of the Southwest Portion of the Nipigon Embayment, Northwestern Ontario

Publication Number: P3580 Scale: 1:100,000    Date: 2006

Author: Hart T.R.

Publisher Name: Ontario Geological Survey

Map - Precambrian Geology, Lac des Iles Area

Publication Number: P3532 Scale: 1:50,000    Date: 2003

Author: Stone D., Fell M., Daley A., Schnieders B.R., Scott J.F., Nielsen P., Wagner D.

Publisher Name: Ontario Geological Survey

Publication - Palladium-Copper-rich Platinum-Group Element Mineralization in Legris Lake Mafic-Ultramafic Complex, Western Superior Province

Publication Number: AppSci v.111 Scale:     Date: 2002

Author: Pettigrew, N.T., Hattori, K.H.

Publisher Name: Applied Earth Science, Volume 111, Issue 1, 2002

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