Latitude: 65°1'44"N
Longitude: 147°27'54"W
Location: Cobb (1972, MF-413), loc. 32; NW1/4SW1/4 sec. 1, T. 2 N., R. 1 E., of the Fairbanks Meridian. The Independence mine is on the southeast side of Twin Creek almost opposite the mouth of Skoogy Gulch; it is about 7 miles by road northeast of Fox along the Steese Highway.
Geology: Gold is found in an east-west-striking, vertical fracture zone in coarse porphyritic granite that has been cut by quartz veins. The quartz veins are broken by iron-stained joints whose surfaces are mineralized and carry gold (Brooks, 1916; B 642; Brooks, 1918). The mineralized zone has been traced for 900 feet on the surface (Brooks, 1918). The fracture zone becomes barren where it crosses the contact from granite into the schist (Brooks, 1916; B 642). Pyrite, arsenopyrite, and galena are present (Brooks, 1916; B 642). This deposit has been developed by two tunnels. In the upper tunnel, quartz veinlets are in a zone 8-10 inches wide in porphyritic granite. This zone is vertical and strikes N 70 E (Hill, 1933). About two-thirds of the gold is in sulfide minerals, and assays show 0.19 to 1.84 ounces of gold per ton (Cobb, 1976; OFR 76-633, p. 103).
Workings: Workings were badly caved by July 1931 (Hill, 1933).
Alteration: Joint surfaces are iron-stained.
Production: Probably has been minor production (Cobb, 1976; OFR 76-633, p. 103; Chapman and Foster, 1969).
Commodities (Major) - Au; (Minor) - Pb
Development Status: Yes; small
Deposit Model: Gold-quartz vein.
References
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., 1918, Mineral resources of Alaska, 1916: U.S. Geological Survey Bulletin 662, 469 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 Livengood quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-413, 2 sheets, scale 1:250,000. Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Livengood quadrangle, Alaska: U.S. Geological Survey Open-File Report 76-819, 241 p. Hill, J.M., 1933, Lode deposits of the Fairbanks district, Alaska: U.S. Geological Survey Bulletin 849-B, p. 29-163.
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