Commodities
PrimaryCopper
SecondarySilver
Commodity typeM
Materials
Ore mineralsChalcopyrite, Pyrite
GangueMagnetite
Geology
AlterationPropylitic alteration having the assemblages pyrite-chlorite +/- epidote and magnetite-epidote +/- chlorite. Christie (1974) reported leaching is weakly developed. Intensely bleached rocks containing up to 10 percent pyrite are locally present. (Possible sericitic alteration?).
Economic & production
Development statusOccurrence
Identification
Deposit ID10003271
MRDS IDA106014
RegionNA
Data scoreD
Coordinates53.74912, -166.16905
References
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Survey Bulletin 1028-S, p. 583-676.Christie, J.S., 1974, Aleut-Quintana-Duval 1974 joint venture, final report: Unpublished Quintana Minerals Corporation report, 24 p., 3 appendices, 2 maps.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.)