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Unnamed (Finski Bay)

Prospect, Inactive

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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

MRDS Number A010385

References

Cobb, E.H., and Tysdal, R.G., 1980, Summaries of data on and list of references to metallic and selected nonmetallic mineral deposits in the Blying Sound and Seward quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-621, 276 p.
Grant, U.S., and Higgins, D.F., Jr., 1909, Notes on geology and mineral prospects in the vicinity of Seward, Kenai Peninsula: U.S. Geological Survey Bulletin 379-C, p. 98-107.
Jansons, Uldis, Hoekzema, R.B., Kurtak, J.M., and Fechner, S.A., 1984, Mineral occurrences in the Chugach National Forest, southcentral Alaska: U.S. Bureau of Mines Mineral Land Assessment 5-84, 218 p., 2 sheets, scale 1:250,000.
Tysdal, R.G., 1978, Mines, prospects, and occurrences map of the Seward and Blying Sound quadrangles, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-880-A, 2 sheets, scale 1:250,000.
Reporters Jeff A. Huber (Anchorage)
Last report date 1/24/2000