Mine detail: Sedanka Island

Previously called 'Biorka'

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Location

Lat / long: 53.79078, -166.2024

Resource(M)

Primary: Gold, Silver, Copper, Zinc
Ore: Chalcopyrite, Gold, Sphalerite, Silver, Galena
Gangue: Ankerite, Pyrite, Quartz

Production

Operation type: Unknown
Development status: Prospect

Geology

Host type:Diorite
Associated rock:Unalaska Formation
Associated type:Diorite,Greenstone
Alteration processes:Christie (1974) reports pervasive development of chlorite and minor sericite and quartz veinlets near diorite.

References

MRDSA013233
DEP10002323
Reference{Deposit:: Webber, B.S., Moss, J.M., and Rutledge, F.A., 1946, Exploration of Sedanka zinc deposit, Sedanka Island, Alaska: U.S. Bureau of Mines Report of Investigations 3967, 15 p.}{Deposit:: Twenhofel, W.S., 1953, Potential Alaskan mineral resources for proposed electrochemical and electrometallurgical industries in the upper Lynn Canal area, Alaska: U.S. Geological Survey Circular 252, 14 p.}{Deposit:: Drewes, Harold, Fraser, G.D., Snyder, G.L., and Barnett, H.F., Jr., 1961, Geology of Unalaska Island and adjacent insular shelf, Aleutian Islands, Alaska: U.S. Geological Survey Bulletin 1028-S, p. 583-676.}{Deposit:: Berg, H.C., and Cobb, E.H., 1967, Metalliferous Lode Deposits of Alaska. U.S. Geological Survey Bulletin 1246, 254 p.}{Deposit:: Cobb, E.H., 1972, Metallic mineral resources map of the Unalaska quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies MF-446, 1 sheet, scale 1: 250,000.}{Deposit:: Randolph, D.B., 1991, Unalaska project, 1990 final report: Battle Mountain Exploration Company, Alaska District, 62 p., 5 appendices, 15 plates, various scales. (Report held by the Aleut Corporation, Anchorage, Alaska.)}
ReporterL.P. Niles, F.H. Wilson, S.W. Bie