Tuluksak River Mine (ARDF - BH014), Aniak District, Bethel Borough, Alaska, USA
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Geology: Extensive dredging has taken place onTuluksak River for about 3 miles upstream of the mouth of Slate Creek. The dredged area is up to 0.4 mile wide and it continues upstream into the Russian Mission quadrangle. Mining on this river started as early as 1909 and continued until 1964 (Hoare and Cobb, 1977). Some platinum was produced along with the gold. There have been some attempts to renew placer mining without apparent success. Copper mineralization in andesitic bedrock was dredged up locally (BH013). A significant part of the bedrock in the drainage is hornfels in Jurassic volcanic rocks surrounding a mid-Cretaceous pluton (Box and others, 1993).
Workings: Dredge tailings at least 3 miles long and up to 0.4 mile wide are present along the river. Ditches, flume, airstrip, buildings, and power line are shown on the USGS Bethel D-3 1:63,360-scale topographic map (1951/1971 edition).
Commodities (Major) - Ag, Au, Pt
Development Status: Yes; medium
Deposit Model: Placer Au-PGE (Cox and Singer, 1986; model 39a).
1 entry listed. 1 valid mineral.
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Box, S.E, Moll-Stalcup, E.J., Frost, T.P., and Murphy, J.M., 1993, Preliminary geologic map of the Bethel and southern Russian Mission quadrangles, southwestern Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-2226-A, 20 p., scale 1:250,000. Cobb, E.H., 1972, Metallic mineral resources map of the Bethel quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-455, 1 sheet, scale 1:250,000. Hoare, J.M., and Cobb, E.H., 1977, Mineral occurrences (other than mineral fuels and construction materials) in the Bethel, Goodnews, and Russian Mission quadrangles, Alaska: U.S. Geological Survey Open-File Report 77-156, 98 p.