Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI52A05SW00005

Record: MDI52A05SW00005

General

Commodities

Primary Commodities: Silver

Secondary Commodities: Zinc, Copper, Calcite, Fluorite, Lead

Location

Township or Area: Lybster

Latitude: 48° 15' 10.47"    Longitude: -89° 51' 48.32"

UTM Zone: 16    Easting: 287457.59   Northing: 5348374.54    UTM Datum: NAD83

Resident Geologist District: Thunder Bay South

NTS Grid: 52A05SW

Point Location Description: Transfer

Location Method: Conversion from MDI

Access Description: Proceed west on Highway 11-17 to Highway 588. Turn left (south) onto Highway 588 and proceed to the village of Nolalu. At Nolalu, turn left (south) onto the second side road 50 m beyond the general store. Follow the second side road for 5.1 km to the intersection with another gravel road. Turn right (west) onto the gravel road and proceed 3.9 km to an old farmhouse on the left side of the road. From the farm house, continue down the road for another 825 m to a clearning. Folow path on NW side of the clearing to a large dump site. Proceed on the trail past the dump.

Exploration History

1884: vein was discovered. 1886: 6.1 m of open cuts and 70.1 m of tunnels, crosscuts and drifts were completed. 1887: property optioned by C. Garland. 1888: Main drift reached 83.8 m. 1889: Approximately 18 tons of ore were shipped to Nebraska. Upper drift was extended to 50.3 m and second drift was 121.9 m. 1890: property sold to A. Stevens, C.E. Shannon and H. Linkhan. Underground development including adits, crosscuts and drifts totalled 228.6 m. 1891: mine development ceased. 1977: J. Redden conducted stripping, geophysical, geological, and geochemical surveys.

Geology

Province: Southern

Formation Group: Animikie Group

Geological Age: Paleoproterozoic  

Lithology

Lithology Comments

Feb 06, 2018 (Therese Pettigrew) - The main vein of Crown Point mine occupies a fault passing through flat-lying Animikie shales and an overlying diabase sill. The south side has moved, relatively, downward through a distance of approximately 15 feet. Slickensides are prominently exposed on the southern side of the upper adit and indicate that the principal movement was approximately vertical (Tanton, 1931).

Mineralization

Mineralization Comments

Feb 06, 2018 (Therese Pettigrew) - The vein as exposed in the upper adit is locally 4 feet wide and divides and re-unites through a shatter zone having a width of about 6 feet. The vein system has a general strike of south 85 degrees east and a dip of 80 degrees toward the south. The veinlets in the shatter zone and the walls of the wide vein are encrusted with quartz, green and purple fluorite, calcite, and amethyst. The central part of the wider vein consists chiefly of coarsely crystalline calcite through which there are seams of barite and quartz. Galena and sphalerite occur irregularly, disseminated and locally concentrated in small seams along with the fluorite. It has been reported that argentite in leaf and nugget form was found locally in the vein (Tanton, 1931).

Mineral Record Details

References

Mono - Silver cobalt calcite vein deposits of Ontario

Publication Number: MDC010 Page: 75  Date: 1968

Author: Sergiades A.O.

Publisher Name: Ontario Dept. of Mines

Location:

Publication - Fort William and Port Arthur, and Thunder Cape Map-area, Thunder Bay District, Ontario; Geological Survey of Canada, Memoir 167

Publication Number: GSC Memoir 167 Page: 117-118  Date: 1931

Author: Tanton, T.L.

Publisher Name: Geological Survey of Canada

Location: https://doi.org/10.4095/100799

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Ministry Contact Information

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