Mine detail: Spruce Hen

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Location:	Fairbanks County, Alaska, United States, North America
Lat / long:	64.95767, -147.51995
dep_id:	10308838
mrds_id:	A015298
Commodity type:	metallic
Major mineral:	Tungsten
Operation type:	Unknown
Development status:	Past Producer
ore:	Molybdenite, Scheelite
gangue:	Calcite, Clinozoisite, Diopside, Fluorite, Garnet, Hornblende, Vesuvianite
model:	42: W skarn
alteration:	Oxidation of scheelite in weathered zone may have occured (Byers, 1957, p. 188).
Reporter:	J.R. Guidetti Schaefer and C.J. Freeman
References:	Deposit:: Mertie, J.B. Jr., 1917, Lode mining in the Fairbanks District, Alaska: U.S. Geological Survey Bulletin 662-H, p. 403-424. Deposit:: Chapin, Theodore, 1919, Mining in the Fairbanks district: U.S. Geological Survey Bulletin 692-F, p. 321-327. Deposit:: Martin, G.C., 1920, The Alaska mining industry in 1918: U.S. Geological Survey Bulletin 712-A, p. 1-52. Deposit:: Thorne, R.L., Muir, N.M., Erickson, A.W., Thomas, B. I., Hedie, H. E., and Wright, W. S., 1948, Tungsten deposits of Alaska: U.S. Bureau of Mines Report of Investigation 4174, 22 p. Deposit:: Byers, F.M., Jr., 1957, Tungsten deposits in the Fairbanks district, Alaska: U.S. Geological Survey Bulletin 1024-I, p. 179-216. Deposit:: Berg, H.C., and Cobb, E.H., 1967, Metalliferous Lode Deposits of Alaska. U.S. Geological Survey Bulletin 1246, 254 p. Deposit:: Cobb, E.H., 1972, Metallic mineral resources map of the Fairbanks quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-410, 1 sheet, scale 1:250,000. Deposit:: Mulligan, J.J., 1974, Mineral resources of the Trans-Alaska Pipeline corridor: U.S. Bureau of Mines Information Circular 8626, 24 p. Deposit:: Cobb, E.H., 1975, Mineral resources of Alaska, in Yount, M.E., ed., U.S. Geological Survey Alaska Program, 1975: U.S. Geological Survey Circular 722, 37 p. Deposit:: Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Fairbanks quadrangle, Alaska: U.S. Geological Survey Open-File Report 76-662, 174 p.