Mine detail: Ear Mountain

Previously called 'Winfield shaftNorth Hill'

Location:	Teller County, Alaska, United States, North America
Lat / long:	65.9443, -166.20946
dep_id:	10308736
Commodity type:	metallic
Major mineral:	Zinc, Silver, Copper, Tin
Operation type:	Unknown
Development status:	Prospect
ore:	Cassiterite, Chalcopyrite, Sphalerite
gangue:	Arsenopyrite, Axinite, Fluorite, Pyrite, Pyrrhotite, Quartz, Sericite, Tourmaline, Zinnwaldite
model:	43: Sn skarn
alteration:	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.
Reporter:	Travis L. Hudson
arock_unit:	Ear Mountain
References:	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.