Unnamed Occurrence (ARDF - ID087; east of Moore Creek placer camp), Iditarod District, Yukon-Koyukuk Borough, Alaska, USA
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Geology: The rocks at this occurrence are unaltered, shale and sandstone of the Upper Cretaceous, Kuskokwim Group (Bundtzen Laird, and Lockwood, 1988; Miller and Bundtzen, 1994; Miller, Bundtzen, and Gray, 2005). A sample collected to establish the background metal content of the rocks in the area contained 150 parts per million (ppm) copper, and 2,000 parts per billion (ppb) silver (McGimsey and others (1988).
Workings: The area was sampled by the U.S. Geological Survey in 1983 (McGimsey and others, 1988).
Commodities (Major) - Ag; (Minor) - Cu
Development Status: None
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Bundtzen, T.K., Laird, G.M., and Lockwood, M.S., 1988, Geologic map of the Iditarod C-3 quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Professional Report 96, 13 p., 1 sheet, scale 1:63,360. McGimsey, R.G., Miller, M.L., and Arbogast, B.F., 1988, Paper version of analytical results, and sample locality map for rock samples from the Iditarod quadrangle, Alaska: U.S. Geological Survey Open-File Report 88-421-A, 110 p., 1 sheet, scale 1:250,000. Miller, M.L., and Bundtzen, T.K., 1994, Generalized geologic map of the Iditarod quadrangle, Alaska showing potassium-argon, major oxide, trace element, fossil, paleocurrent, and archeological sample localities: U.S. Geological Survey Miscellaneous Field Studies Map MF-2219-A, 48 pages; 1 sheet, scale 1:250,000. Miller, M.L., Bundtzen, T.K., and Gray, J.E., 2005, Mineral resource assessment of the Iditarod quadrangle, west-central Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-2219-B, scale 1:250,000, pamphlet.