Alaska
Occurrence

Unnamed (on Cape Kumlik)

Alaska, United States
CopperMolybdenumGoldSilver
⌖ Show on mapUSGS source ↗
Commodities
PrimaryCopper
SecondaryMolybdenum, Gold, Silver
Commodity typeM
Deposit
Model53: Porphyry Cu
Materials
Ore mineralsChalcopyrite, Molybdenite, Pyrite
GangueBarite, Quartz
Geology
Host rockDacite · Meshik Formation;Meshik Formation;Meshik Formation;Meshik Formation
Associated rockTonalite
AlterationThe rocks exhibit a zoned alteration pattern, with a central potassic core grading outward to quartz-sericite and silicification, and to peripheral propylitization.
Economic & production
Development statusOccurrence
Identification
Deposit ID10001665
MRDS IDA012442
RegionNA
Data scoreC
Coordinates56.62931, -157.48246
References
Yount, M.E., Cooley, E.F., and O'Leary, R.M., 1978, Sample location map, analytical data, and statistical summary of analyses of rock samples, Chignik and Sutwik Island quadrangles, Alaska: U.S. Geological Survey Open-File Report 78-557, l sheet, scale l:250,000.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.Hedderly-Smith, D.A., 1977 Annual report, Alaska search, Koniag Inc. region: Bear Creek Mining Company, Spokane Office, 23 p. (Report held by Kennecott Alaska, Anchorage).