Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI52O04NE00024

Record: MDI52O04NE00024

General

Commodities

Primary Commodities: Gold, Silver, Copper, Zinc, Lead

Location

Township or Area: Wesleyan Lake Area

Latitude: 51° 10' 55.19"    Longitude: -91° 33' 11.08"

UTM Zone: 15    Easting: 601129.998   Northing: 5671058.998    UTM Datum: NAD83

Resident Geologist District: Thunder Bay North

NTS Grid: 52O04NE

Point Location Description: Trenches and diamond-drill holes.

Location Method: Conversion from MDI

Access Description: The Trail Vein occurrence is located about 97 km west-southwest of Pickle Lake and 3.4 km northeast of the First Nation Community of Slate Falls. Access to the Trail Vein occurrence is by appropriately equipped aircraft to North Bamaji Lake. About 2 km east of the First Nation community of Slate Falls is a north-trending bay of North Bamaji Lake. A foot trail leads from the north end of this bay north and east to the occurrence area. A winter road along the Ear Falls to Pickle Lake power corridor passes about 2 km south of the occurrence.

Exploration History

1965: Claims were staked on this occurrence and transferred to Dome Exploration (Canada) Ltd. 1966: Dome Exploration Canada Ltd. did considerable trenching on the claims before transferring the claims back to a Mr. Sanderson of Balmertown. 1966: Cochenour Willans Gold Mines Ltd. acquired an option on the claims and did a diamond-drilling program of 9 holes totalling 447 m. 1980: St. Joseph Explorations Ltd. staked claims covering the occurrence and did geological mapping and geophysical surveys. 1981: St. Joseph Explorations Ltd. did more geological mapping and geophysical surveys. They also did orientation soil geochemistry surveys, trenching and staked additional claims. 1984: Sulpetro Minerals Ltd. (name changed from St. Joseph Explorations Ltd.) did 14 diamond-drill holes totalling 2235 m on their claims. The post-1984 exploration history of the area is summarized by Nelson (2002).

Assessment Work on File

Geology

Province: Superior

Subprovince: Uchi

Terrane: North Caribou

Domain: Uchi

Belt: Meen-Dempster

Geological Age: Archean  

Geology Comments

Jan 16, 2007 (Mark Puumala) - The geology of the area of this occurrence is described in MDI52O04NE00019.

Lithology

Mineralization

Mineralization Comments

Jan 16, 2007 (Mark Puumala) - The Trail Vein occurrence is contained in a south-dipping shear zone which trends 100 degrees through massive, well-bedded siltstone. The shear zone has been traced by trenching and drilling for about 50 m. The Trail Vein occurrence is a lensoid, possibly boudinaged, milky quartz vein. The vein varies in width between 10 cm and 15 cm. The sulphide minerals contained in the vein are pyrite, sphalerite, chalcopyrite, tetrahedrite, pyrrhotite and galena. The sulphides occur as stringers and masses within the vein. Total sulphide content of the vein is up to 5% though local sulphide concentrations suggest a higher content. Ackert (1997) has re-interpreted the rocks previously mapped in this area as metasediments as being deformed pillowed mafic metavolcanic flows. The deformed pillow structures are reported to give the rock a banded appearance. Nelson (2002) indicates that the mineralized vein cross-cuts mafic metavolcanics, clastic metasediments and granite. 20 chip samples collected from this zone over a 70 m strike length are reported by Nelson (2002) to have averaged 15.1 g/t Au across 0.74 m. The Trail Vein has yielded some spectacular gold and silver values from near massive pods of sulphide mineralization. Chip samples from the trenches on the vein have assayed up to 2.44 oz/ton Au, 25.08 oz/ton Ag, 0.7% Cu, 0.405% Pb and 0.368% Zn over a 15 cm width and a 30 cm length of vein. Sulpetro Minerals Ltd. diamond-drill hole 3357-14, drilled to test the western extension of the Trail Vein, intersected 3 narrow quartz veins. Assay results follow: From 16.30 m to 16.65 m (0.55 m total): 0.064 oz/ton Au, 2.83 oz/ton Ag. From 45.70 m to 46.02 m (0.32 m total): 0.339 oz/ton Au, 6.63 oz/ton Ag. From 50.82 m to51.07 m (0.25 m total): 0.741 oz/ton Au, 4.98 oz/ton Ag. The Sioux Lookout Staff Geologist examined the Trail Vein occurrence in 1989 and took 2 grab samples. Results are: GWS-89-37: 4770 ppb Au, 94 ppm Ag, 765 ppm Cu, 390 ppm Zn, 4000 ppm Pb. GWS-89-38: 2.20 oz/ton Au, 26.5 oz/ton Ag, 5300 ppm Cu, 28400 ppm Zn, 26300 ppm Pb. 20 chip samples collected from this zone over a 70 m strike length are reported by Nelson (2002) to have averaged 15.1 g/t Au across 0.74 m.

Mineral Record Details

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:

MonoMap - Geology of the Cat Lake-Pickle Lake area, districts of Kenora and Thunder Bay

Publication Number: R207 Date: 1982

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

Publisher Name: Ontario Geological Survey

Location:

Map - Wesleyan Lake, Kenora District

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

Author: Wallace H.

Publisher Name: Ontario Geological Survey

Location:

MonoMap - Geology of the Slate Falls area, District of Kenora (Patricia Portion)

Publication Number: R232 Date: 1985

Author: Wallace H.

Publisher Name: Ontario Geological Survey

Location:

Mono - Mineral Deposits of the Central Portion of Uchi Subprovince, Volume 1, Meen Lake to Kesagiminnis Lake Portion

Publication Number: OFR5869 Page: 144  Date: 1993

Author: Seim G.Wm.

Publisher Name: Ontario Geological Survey

Location:

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