Alaska
Prospect

Orange Hill

Alaska, United States
CopperMolybdenumGoldSilver
⌖ Show on mapUSGS source ↗
Commodities
PrimaryCopper, Molybdenum, Gold, Silver
Commodity typeM
Deposit
Model79: Porphyry Cu-Mo
Materials
Ore mineralsChalcopyrite, Molybdenite, Pyrite
GangueCalcite, Gypsum, Quartz
Geology
AlterationCentral altered zone 400 m by 2000 m contain abundant biotite, quartz veinlets, minor k-feldspar, chlorite, and sericite cut by late stage anhydrite veins. Outer altered zones contain chlorite, minor sericite and anhydrite.
Economic & production
Development statusProspect
Identification
Deposit ID10308923
MRDS IDA011395
RegionNA
Data scoreB
Coordinates62.20549, -142.84454
References
Moffit, F.H., 1943, Geology of the Nutzotin Mountains, Alaska, with a section on the igneous rocks, by R. C. Wayland, and Gold deposits near Nabesna, by R. C. Wayland, 1943: U.S. Geological Survey Bulletin 933-B, p. 103-199.Van Alstine, R.E., and Black, R.F., 1944, Mineral deposits at Orange, Hill, Alaska: U.S. Geological Survey Open-File Report 76, 16 p., 1 sheet.Moffit, F.H., 1954, Geology of the eastern part of the Alaska Range and adjacent area: U.S. Geological Survey Bulletin 989-D, p. 63-218.Richter, D.H., 1973, Reconnaissance geological map of the Nabesna A-1 quadrangle, Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map 1-789, scale 1:63,360.Richter, D.H., Singer, D.A., and Cox, D.P., 1975, Mineral resources map of the Nabesna quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-655-K, scale 1:250,000.Hollister, V.F., Anzalone, S.A., and Richter, D.H., 1975, Porphyry copper belts of southern Alaska and contiguous Yukon Territory: CIM (Canadian Mining and Metallurgical) Bulletin, v. 68, no. 756, p. 104-112.Richter, D.H., and Matson, N.A., 1970, Geochemical data from the Nabesna A-4 quadrangle, Alaska: U.S. Geological Survey Open-File Report 70-276, 14 p., 1 sheet, scale 1:63,360.