Alaska
Occurrence

Unnamed (southeast Nakchamik Island)

Alaska, United States
Copper
⌖ Show on mapUSGS source ↗
Commodities
PrimaryCopper
Deposit
Model53: Porphyry Cu
Materials
Ore mineralsChalcopyrite, Pyrite
GangueQuartz
Geology
AlterationThe alteration is unknown but probably includes propylitic and sericitic types.
Economic & production
Development statusOccurrence
Identification
Deposit ID10308351
RegionNA
Data scoreC
Coordinates56.3193, -157.82244
References
U.S. Bureau of Mines, 1973, Alaska 1:250,000-scale quadrangle map overlays showing mineral deposit locations, principal minerals, and number and type of claims: U.S. Bureau of Mines Open-File Report 20-73, 95 overlays (updated in 1986, 1987).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.Detterman, R.L., Miller, T.P., Yount, M.E., and Wilson, F.H.,1981, Geologic map the Chignik and Sutwik Island quadrangles Alaska: U.S. Geologic Survey Miscellaneous Investigations Series Map I- 1229, 1 map sheet, scale 1:250,000.MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous mineral deposits in the western part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-F, 38 p., 1 sheet, scale 1:1,000,000.