Gold Run Mine, Fairhaven District, Northwest Arctic Borough, Alaska, USA
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Geology: Placer gold was discovered on Gold Run Creek in 1908 and mining or exploration activities were reported for many years up to WW II (Cobb, 1975, OFR 75-429). Early mining was in ground 6 to 12 feet deep in the upper creek (Henshaw, 1910). Scheelite, wolframite, and kyanite were reported to be present in placer concentrates and kyanite was exposed in a placer cut (Anderson, 1947). Bedrock along the north and east side of Kiwalik Mountain is part of Lower Paleozoic metasedimentary assemblage that includes metamophosed felsic dikes or sills thought to be related to the Devonian Kiwalik Mountain gneiss (Till and others, 1986). The metasedimentary assemblage includes marble, metapelitic rocks, and in some areas quartz-mica rocks that may be metatuffs or exhalites. Felsic metavolcanic rocks are present in this assemblage at the HOM (BN077) and Big Bar (BN083) prospects. Some skarn-like rocks are also present locally on this side of Kiwalik Mountain. The Lower Paleozoic assemblage is inferred to lay unconformably on polydeformed metapelitic schist of Monument Mountain that may be Precambrian in age.
Workings: Surface open-cut placer workings are present locally on this creek.
Commodities (Major) - Au; (Minor) - W
Development Status: Yes; small
Deposit Model: Placer Au-PGE (Cox and Singer, 1986; model 39a)
4 entries listed. 3 valid minerals.
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Anderson, Eskil, 1947, Mineral occurrences other than gold deposits in northwestern Alaska: Alaska Territorial Division of Mines Pamphlet 5-R, 48 p. Cobb, E.H., 1972, Metallic mineral resources map of the Bendeleben quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-417, 1 sheet, scale 1:250,000. Cobb, E.H., 1975, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Bendeleben quadrangle, Alaska: U.S. Geological Survey Open-File Report 75-429, 123 p. Henshaw, F.F., 1910, Mining in Seward Peninsula: U.S. Geological Survey Bulletin 442-I, p. 353-371. Till, A.B., Dumoulin, J.A., Gamble, B. ., Kaufman, D.S., and Carroll, P.I., 1986, Preliminary geologic map and fossil data, Soloman, Bendeleben, and southern Kotzebue quadrangles, Seward Peninsula, Alaska: U.S. Geological Survey Open-File Report 86-276, 10 p., 3 plates, scale 1:250,000.