Commodities
PrimarySilver, Gold
SecondaryMolybdenum, Mercury, Copper, Arsenic
Deposit
Model106: Epithermal vein, Creede
Materials
Ore mineralsChalcopyrite, Gold, Molybdenite, Pyrite
GangueQuartz
Geology
AlterationThe volcanic rocks exhibit regional propylitic alteration overprinted by silicification, and local potassium flooding or secondary growth on primary feldspars (Randolph and Ellis, 1989). Trace amonts of adularia has been identified as fracture coatings. No argillic alteration has been recognized. Some pyrite-filled fractures show narrow kaolinite-epidote-sericite alteration envelopes. Quartz veins may be accompanied by pyritization and silicification in the surrounding wall rock.
Economic & production
Development statusProspect
Identification
Deposit ID10308469
Alternate namesSteeple Mountain
RegionNA
Data scoreB
Coordinates53.27907, -168.22237
References
Christie, J.S., 1974, Aleut-Quintana-Duval 1974 joint venture, final report: Unpublished Quintana Minerals Corporation report, 24 p., 3 appendices, 2 maps.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.)Randolph, D.B., and Ellis, W.T., 1989, Unalaska project, 1989 final report: Battle Mountain Exploration Company, Alaska District, 41 p., 5 appendices, 11 plates, various scales. (Report held by the Aleut Corporation, Anchorage, Alaska.)Bundtzen, T.K., Swainbank, R.C., Deagen, J.R. and Moore, J.L., 1990, Alaska's mineral industry 1989: Alaska Division of Geological and Geophysical Surveys Special Report 44, 100 p.Simpson, D.F., 1986, Aleutian Islands project, 1985 final report: Kennecott-Alaska Exploration Company, 54 p. (Report held by the Aleut Native Corporation, Anchorage, Alaska).