Mine detail: Ear Mountain

Previously called 'Winfield shaftNorth Hill'

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Location

Lat / long:

65.9443, -166.20946

Resource(M)

Primary:	Zinc, Silver, Copper, Tin
Ore:	Cassiterite, Chalcopyrite, Sphalerite
Gangue:	Arsenopyrite, Axinite, Fluorite, Pyrite, Pyrrhotite, Quartz, Sericite, Tourmaline, Zinnwaldite

Production

Operation type:	Unknown
Development status:	Prospect

Geology

Associated rock:	Ear Mountain
Alteration processes:	Alteration includes: skarn and hornfels development in country rocks; quartz-tourmaline-fluorite-white mica veining and replacement of granite; and sulfide-bearing replacement of country rocks with or without quartz, fluorite, and boron-bearing silicates.

References

DEP	10308736
Reference	{Deposit:: Knopf, Adolph, 1908, Geology of the Seward Peninsula tin deposits, Alaska: U.S. Geological Survey Bulletin 358, 71 p.}{Deposit:: Mulligan, J.J., 1959, Tin placer and lode investigations, Ear Mountain area, Seward Peninsula, Alaska: U.S. Bureau of Mines Report of Investigations 5493, 53 p.}{Deposit:: Sainsbury, C.L., 1972, Geologic map of the Teller quadrangle, Seward Peninsula, Alaska: U.S. Geological Survey Map I-685, 4 p., 1 sheet, scale 1:250,000.}{Deposit:: Cobb, E.H., and Sainsbury, C.L., 1972, Metallic mineral resource map of the Teller quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-426, 1 sheet, scale 1:250,000.}{Deposit:: Cobb, E.H., 1975, Tungsten occurrences in Alaska: U.S. Geological Survey Mineral Investigations Resource Map MR-66, 1 sheet, scale 1:250,000.}{Deposit:: Hudson, T.L., and Arth, J. G., 1983, Tin-granites of Seward Peninsula, Alaska: Geological Society of America Bulletin, v. 94, p. 768-790.}
Reporter	Travis L. Hudson