Alaska
Producer

Lost River-skarn

Alaska, United States
TungstenTinFluorine-FluoriteLeadCopperSilver
⌖ Show on mapUSGS source ↗
Commodities
PrimaryTungsten, Tin, Fluorine-Fluorite
SecondaryLead, Copper, Silver
Deposit
Model43: Sn skarn
Materials
Ore mineralsCassiterite, Chalcopyrite, Fluorite, Scheelite, Sphalerite, Wolframite
GangueBiotite, Garnet, Hornblende, Idocrase, Pyrite, Pyrrhotite, Mica
Geology
Associated rockLost River
AlterationThere are several stages and styles of alteration in the Lost River skarn deposit; (1) early anhydrous skarn with abundant garnet and idocrase, (2) hydrous skarn with biotite and hornblende, (3) fluorite-mica veining, (4) mica-matrix breccias, and (5) clay-matrix breccias.
Economic & production
Development statusProducer
Identification
Deposit ID10308413
RegionNA
Data scoreB
Coordinates65.47327, -167.1594
References
Lorain, S.H., Wells, R.R., Mihelich, Miro, Mulligan, J.J., Thorne, R.L., and Herdlick, J.A., 1958, Lode-tin mining at Lost River, Seward Peninsula, Alaska: U.S. Bureau of Mines Information Circular 7871, 76 p.Sainsbury, C.L., 1964, Geology of the Lost River mine area, Alaska: U.S. Geological Survey Bulletin 1129, 80 p.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.Dobson, D.C., 1982, Geology and alteration of the Lost River tin-tungsten-fluorine deposit, Alaska: Economic Geology, v. 77, p. 1033-1052.Hudson, T.L., and Arth, J. G., 1983, Tin-granites of Seward Peninsula, Alaska: Geological Society of America Bulletin, v. 94, p. 768-790.Hudson, T.L., and Reed, B.L., 1997, Tin deposits of Alaska, in Goldfarb, R.J., and Miller, L.D., eds., Mineral Deposits of Alaska: Economic Geology Monograph 9, p. 450-465.Cobb, E.H., 1975, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Teller quadrangle, Alaska: U.S. Geological Survey Open-File Report 75-587, 130 p.