Mine detail: Unnamed

Previously called ''

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Location

Lat / long:

53.70243, -166.98572

Resource(M)

Primary:	Silver, Copper
Ore:	Chalcopyrite, Pyrite
Gangue:	Magnetite

Production

Operation type:	Unknown
Development status:	Occurrence

Geology

Alteration processes:

Alteration of the porphyry consists of chloritized mafic minerals, chalky feldspar, and minor disseminated pyrite. In zones outward from the contact with the porphyry the Unalaska Formation displays pervasive sericitic alteration and contains minor quartz veinlets and pyrite. Peripheral to this the rocks contain sericite and pyrite in fractures which grades to pervasively developed chlorite (propylitic alteration) and pyrite limited to fractures; and finally pervasive epidote and disseminated pyrite. Christie (1974) reports partial leaching, complete in the breccia, however the leached phase is not identified.

References

MRDS	A106015
DEP	10003272
Reference	{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Bulletin 1028-S, p. 583-676.}{Deposit:: Christie, J.S., 1974, Aleut-Quintana-Duval 1974 joint venture, final report: Unpublished Quintana Minerals Corporation report, 24 p., 3 appendices, 2 maps. (Report held by the Aleut Corporation, Anchorage, Alaska.)}
Reporter	F.H. Wilson, Damon Bickerstaff