Unnamed (Finski Bay)

Prospect, Inactive

Commodities and mineralogy

Main commodities Cu
Ore minerals chalcopyrite; pyrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale SR
Quadrangle map, 1:63,360-scale D-1
Latitude 60.8976
Longitude -147.0976
Nearby scientific data Find additional scientific data near this location
Location and accuracy The prospect is located on the west side of Finski Bay in the W1/2 section 24, T. 11 S., R. 11 W., of the Copper River Meridian. This is location 186 of Tysdal (1978 [MF-880-A]) and location S-105 of Jansons and others (1984). This location is accurate to within half a mile.

Geologic setting

Geologic description

The prospect is hosted in sheared pillow basalt and greenstone of the Orca Group of Tertiary age. It consists of three 0.5- to 1-foot-wide quartz veins. The veins contain pyrite and chalcopyrite (Cobb and Tysdal, 1980). The single working on the prospect is a 70-foot drift. The U.S. Bureau of Mines sampled this prospect in 1981; they collected two samples of vein material that contained 11 and 70 ppm copper (Jansons and others, 1984).
Geologic map unit (-147.099642958523, 60.8970601424864)
Mineral deposit model Cyprus massive sulfide (Cox and Singer, 1986; model 24a)
Mineral deposit model number 24a
Age of mineralization Tertiary or younger; the veins are in pillow basalt of the Orca Group of Tertiary age.

Production and reserves

Workings or exploration The working on the prospect consists of a 70-foot drift. The U.S. Bureau of Mines sampled this occurrence in 1981; two samples of vein material contained 11 and 70 ppm copper (Jansons and others, 1984).
Indication of production None

References