Big Creek Prospect, Fortymile District, Southeast Fairbanks Borough, Alaska, USA
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Location: Big Creek prospect is located within section 7, T. 20 N., R. 22 E., of the Copper River Meridian, at about 3000 feet elevation on a northwest facing hillside above Big Creek. It is location 12 of Singer and others (1976), and location 3 of Eberlein and others (1977). The location is accurate to within a mile.
Geology: The Big Creek prospect is in an area of possible stratiform sulfide deposits. It consists of galena, sphalerite and iron sulfides disseminated in quartz-mica schist of Paleozoic and/or Precambrian age (Eberlein and others, 1977, p. 101). The regional geology around the prospect consists of amphibolite-grade quartz-mica schist that is Precambrian to Paleozoic in age (Foster, 1970). High copper anomalies were found in soil samples collected during the early 1970's, although no primary mineralization was found on the surface (David Hedderly-Smith, oral communication, 1998).
Workings: Surface exploration and soil sampling conducted in the 1970's. There probably has been more recent exploration in the area.
Commodities (Major) - Pb, Zn
Development Status: None
Deposit Model: Stratiform Pb-Zn volcanogenic deposit?
Mineral List
3 entries listed. 3 valid minerals.
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References
Cobb, E.H., and Eberlein, G.D., 1980, Summaries of data on and lists of references to metallic and selected nonmetallic mineral deposits in the Big Delta and Tanacross quadrangles, Alaska: U.S. Geological Survey Open-File Report 80-1086, 77 p. Eberlein, G.D., Chapman, R.M., Foster, H.L., and Gassaway, J.S., 1977, Map and table describing known metalliferous and selected nonmetalliferous mineral deposits in central Alaska: U.S. Geological Survey Open-File Report 77-168-D, 132 p., 1 sheet, scale 1:1,000,000. Foster, H.L., 1970, Reconnaissance geologic map of the Tanacross quadrangle, Alaska: U.S. Geological Survey Miscellaneous Geological Investigations Map I-593, 1 sheet, scale 1:250,000. Singer, D.A., Curtin, G.C., and Foster, H.L., 1976, Mineral resources map of the Tanacross quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-767-E, 1 sheet, scale 1:25,000.
