Friendship

Prospect, Probably inactive

Commodities and mineralogy

Main commodities Au; Cu
Ore minerals azurite; chalcopyrite; malachite
Gangue minerals calcite; quartz

Geographic location

Quadrangle map, 1:250,000-scale CR
Quadrangle map, 1:63,360-scale A-1
Latitude 55.21807
Longitude -132.31379
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Friendship prospect is just above the shoreline on the west side of the South Arm of Cholmondeley Sound, about 2.4 miles southwest of its mouth. It is about 0.4 mile south-southwest of the center of section 4, T. 77 S., R. 87 E. The Friendship prospect is sometimes described together with the Ruby Tuesday prospect (CR169) about 0.4 mile to the west.

Geologic setting

Geologic description

The Friendship prospect has been known since before 1902 (Brooks, 1902) but little work has been done on it since then. The workings consist of a flooded pit and a shaft about 15 feet deep (Maas and others, 1991). The rocks in the vicinity consist of marble and greenschist of the Wales Group of Late Proterozoic and Cambrian age (Herreid and others, 1978). As described by Maas and others (1991), the deposit consists of a quartz-calcite vein 1.1 to 3.8 feet thick, with chalcopyrite, azurite, and malachite. One wall of the vein is marble, the other is felsic schist. The vein is along a shear zone that strikes N20-30E and has a steep dip. Seven samples contained 2,574 parts per million (ppm) to 0.456 ounce of gold per ton, and several contained more than 2 percent copper. The highest gold value in a 3.6-foot sample of the vein was 0.456 ounce per ton; the highest copper value in a 1-foot sample was 3.91 percent. There was negligible silver, lead, or zinc.
Geologic map unit (-132.31546242842, 55.2177132752191)
Mineral deposit model Calcite-quartz vein with copper minerals.

Production and reserves

Workings or exploration The workings consist of a flooded pit and a shaft about 15 feet deep.
Indication of production None

References

MRDS Number A010109

References

Reporters D.J. Grybeck (Applied Geology)
Last report date 5/1/2004