Finger Bay

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag; Au; Cu
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale AD
Quadrangle map, 1:63,360-scale C-2
Latitude 51.8283
Longitude -176.6069
Nearby scientific data Find additional scientific data near this location
Location and accuracy South of Finger Bay, approximately 1.35 km southeast of where road first reaches Finger Bay. Location is accurate within about 100 m. Elevation about 150 m.

Geologic setting

Geologic description

Geologic map (Fraser and Snyder, 1959) shows locality is near contact where gabbro intrudes other volcanic rock units of the Finger Bay Volcanics. Two samples were collected, one gabbro, the other siliceous andesite(?) containing quartz phenocrysts(?) and sulfide minerals. The andesite is cut by thin stringers of quartz and some fracture/cleavage surfaces are coated with sulfide minerals. The gabbro is coarse-grained and sulfide mineral-bearing. The mineralization is thought to be associated with hydrothermal remobilization along the contact.
Geologic map unit (-176.609366876637, 51.8269224811058)
Age of mineralization Tertiary.
Alteration of deposit Silicification of volcanic rocks and minor introduction of chlorite.

Production and reserves

Workings or exploration Two samples collected during U.S. Geological Survey field work in 1993. Sample 93AWs 101 (gabbro) contained 730 ppm Cu, 0.27 ppm Ag, and 4 ppb Au. Sample 93TL 101 (andesite) contained 2 ppb Au, and 150 ppm Cu (unpublished data, U.S. Geological Survey, 1994).
Indication of production None

References

MRDS Number A106037
Reporters F.H. Wilson, T.D. Light
Last report date 2/22/1996