Commodities
PrimaryZinc, Copper, Gold
Deposit
Model184: Massive sulfide, kuroko
Materials
Ore mineralsChalcopyrite, Gold, Pyrite, Sphalerite
GangueAnhydrite, Barite, Calcite, Quartz
Geology
AlterationThe Difficult Creek occurrence has alteration characteristics of a Kuroko type massive sulfide deposit that includes sulfate alteration, and silification.
Economic & production
Development statusOccurrence
Identification
Deposit ID10307712
RegionNA
Data scoreB
Coordinates60.15045, -152.87763
References
Detterman, R.L., Reed, B.L., and Lamphere, A.A., 1965, Jurassic plutonism in the Cook Inlet region, Alaska: U.S. Geological Survey Professional Paper 525-D, p. D16-D21.Detterman, R.L., and Hartsock, J.L., 1966, Geology of the Iniskin-Tuxedni region, Alaska: U.S. Geological Survey Professional Paper 512, 78 p.Steefel, C.I., 1987, The Johnson River Prospect, Alaska: Gold rich sea-floor mineralization from the Jurassic: Economic Geology, V. 82, p. 894-914.Swainbank, R.C., Bundtzen, T. K., Clough A.H., and Henning, M.W., 1997, Alaska's mineral industry 1996: Alaska Division of Geological and Geophysical Surveys Special Report 51, 68 p.