Alaska
Occurrence

Bear Mountain

Alaska, United States
MolybdenumTungstenLead
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Commodities
PrimaryMolybdenum, Tungsten, Lead
Commodity typeM
Materials
Ore mineralsGalena, Molybdenite, Wolframite
GangueGoethite, Hematite, Jarosite, Kaolinite, Limonite, Magnetite, Muscovite, Quartz, Rutile, Topaz
Geology
Host rockRhyolite
Associated rockMetasedimentary Rock
AlterationCore of sericitic and argillic alteration with outer zone of silicification; local peripheral areas of pyritic and propylitic alteration.
Economic & production
Development statusOccurrence
Identification
Deposit ID10001758
MRDS IDA012545
RegionNA
Data scoreB
Coordinates68.36988, -142.15319
References
Barker, J.C., and Swainbank, R.C., 1986, A tungsten-rich porphyry molybdenum occurrence at Bear Mountain, northeast Alaska: Economic Geology vol. 81, p. 1753-9Barker, J.C., 1978, Mineral Investigations of certain lands in the eastern Brooks Range: a summary report: US Bureau of Mines Open-File No. 63-78Grybeck, D.J., 1977, Known mineral deposits of the Brooks Range, Alaska: US Geological Survey Open-File Report 77-166C, 41 p., 1 sheet, scale 1:1,000,000.Brosge', W.P., and Reiser, H.N., 1976, Preliminary geologic and mineral resource maps (excluding petroleum), Arctic National Wildlife Range, Alaska: U.S. Geological Survey Open-File Report 76-539, 4 sheets, scale 1:500,000.Cobb, E.H., 1973, Placer deposits of Alaska: U.S. Geological Survey Bulletin 1374, 213 p.Brosgi, W.R., and Reiser, H.N., 1968, Geochemical maps of granitic rocks, Coleen and Table Mountain quadrangles, Alaska: U.S. Geological Survey Open-File Report 323, scale 1:250,000.Cobb, E.H., Mayfield, C.F., and Brosge, W.P., 1981, Summaries of data on and lists of references to metallic and selected nonmetallic mineral occurrences in eleven quadrangles in northern Alaska (Arctic, Baird Mountains, Chandler Lake, DeLong Mountains, Demarcation Point, Howard Pass, Misheguk Mountain, Mount Michelson, Noatak, Point Lay, and Table Mountain); Supplement to Open-File Report 75-628; Part A, Summaries of data to January 1, 1981: U.S. Geological Survey Open-File Report 81-767-A, 25 p.