Commodities
PrimaryCopper, Molybdenum
SecondaryLead, Gold, Zinc
Commodity typeM
Deposit
Model53: Porphyry Cu78: Porphyry Cu-Au79: Porphyry Cu-Mo
Materials
Ore mineralsChalcopyrite, Galena, Gold, Molybdenite, Pyrite, Pyrrhotite, Sphalerite
GangueChlorite, Quartz
Geology
Host rockSiltstone · Naknek Formation;Naknek Formation;Naknek Formation;
Associated rockBlack Shale · Naknek Formation;Naknek Formation
AlterationAlteration in the intrusive consists of local zones containing chlorite, epidote, and secondary biotite. The sediments near the intrusive contact have been hornfelsed, silicified, and contain chlorite and secondary biotite.
Economic & production
Development statusOccurrence
Identification
Deposit ID10001672
MRDS IDA012450
RegionNA
Data scoreB
Coordinates56.14234, -158.78134
References
Fields, E.D., 1977, 1976 Annual report: Alaska search, Chignik area-Bristol Bay region: Bear Creek Mining Company, 44 p., 22 map sheets. (Report held by the Aleut Corporation, Anchorage, Alaska.)Anderson, G.D., Fitch, G.M., Lappie, D.W., Lindberg, P.A., and Fankhauser, R.E., 1979, Exploration and evaluation of Bristol Bay Native Corporation Lands, Vol. II, Book 1: prepared for Houston Oil and Minerals Company by Resource Associates of Alaska, 78 p. (Report held by Alaska Earth Science, Anchorage, Alaska.)Cox, D.P., Detra, D.E., and Detterman, R.L., 1981, Mineral resource maps of the Chignik and Sutwik Island quadrangles, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF- 1053-K, 2 map sheets, scale 1:250,000.