Stibnite Mine, Fairbanks District, Fairbanks North Star Borough, Alaska, USA

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Location: The Stibnite mine is located in the NW1/4SW1/4 sec. 32, T. 1 N., R. 2 W., Fairbanks Meridian. The Stibnite mine is near the head of the east fork of Eva Creek at an elevation of about 1,300 feet. It is about 1.6 miles north-northeast of the town of Ester. It is included in locality 14 of Cobb (1972 [MF 410]).
Geology: The Stibnite mine began producing ore as early as 1915 (Brooks, 1916 [B 642-A, p. 29]). Stibnite occurs in a shear zone as lenses, kidneys, and in granulary aggregates with some columnar masses; it is associated with iron-stained quartz veins and fragments of schist (Brooks, 1916 [B 649, p. 38-39]; Killeen and Mertie, 1951, p. 14-15). The shear zone trends N. 17 W. and dips 70-89 S.; the stibnite lenses pitch north (Killeen and Mertie, 1951). The largest lens of stibnite reported was 100 feet long, 7 feet wide, and 4 feet thick (Killeen and Mertie, 1951). In 1915 and 1926, about 300 tons of ore were produced from these large stibnite masses (Ebbley and Wright, 1948, p. 38; Killeen and Mertie, 1951). Shipments in 1915 contained 51.5 percent antimony (Killeen and Mertie, 1951). Killeen and Mertie considered the deposit to be mined out in 1951.
Workings: Ore was mined from open cuts and pits (Brooks, 1916 [B 649, p. 17]).
Alteration: Iron-stained quartz veins form the hanging wall (Brooks, 1916 [B 649]).
Production: In 1915 and 1926, about 300 tons of ore were produced from large stibnite masses (Ebbley and Wright, 1948, p. 38; Killeen and Mertie, 1951).

Commodities (Major) - Sb
Development Status: Yes; small
Deposit Model: Simple Sb deposit (Cox and Singer, 1986; model 27d)

References

Berg, H.C., and Cobb, E.H., 1967, Metalliferous lode deposits of Alaska: U.S. Geological Survey Bulletin 1246, 254 p. Brooks, A.H., 1916, Mineral resources of Alaska, report on progress of investigations in 1915: U.S. Geological Survey Bulletin 642, 279 p. Brooks, A.H., 1916, Antimony deposits of Alaska: U.S. Geological Survey Bulletin 649, 67 p. Chapman, R.M., and Foster, R.L., 1969, Lode mines and prospects in the Fairbanks district, Alaska: U.S. Geological Survey Professional Paper 625-D, 25 p., 1 plate. 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. 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. Ebbley, Norman, Jr., and Wright, W.S., 1948, Antimony deposits in Alaska: U.S. Bureau of Mines Report of Investigations 4173, 41 p. Joesting, H.R., 1942, Strategic mineral occurences in interior Alaska: Alaska Territorial Department of Mines Pamphlet 1, 46 p. Killeen, P.L., and Mertie, J.B., 1951, Antimony ore in the Fairbanks District, Alaska: U.S. Geological Survey Open-File Report 51-46, 43 p.

Mineral List

Stibnite

1 entry listed. 1 valid mineral.