Unnamed Occurrence (ARDF - CA036; Muck Creek), Fairhaven District, Northwest Arctic Borough, Alaska, USA

Stream gradient approximately 150 feet per mile.
Location: This occurrence is at the head of Muck Creek, an informally named, north-flowing tributary to Hunter Creek. The map site is in section 14, T. 4 N., R. 14 W., of the Kateel River Meridian. Cobb, 1972 (MF-389), location 25.
Geology: The Muck Creek area is underlain by Upper Cretaceous granitic rocks that may contain uranium-bearing minerals (Gault and others, 1953). Two pan-concentrate samples of stream gravels contained 0.125% and 0.16% equivalent uranium. Heavy minerals from the concentrate include garnet, hornblende, augite, sphene, zircon, epidote, apatite, schleeite, powellite, ilmenite, hematite, limonite, magnetite, uranothorianite, and pyrite.
Workings: Two pan-concentrate samples were collected and analyzed for uranium content by the U.S. Geological Survey (Gault and others, 1953).
Age: Late Cretaceous; Quaternary.

Commodities (Major) - Radioactive minerals, W
Development Status: Undetermined

References:
Cobb, E.H., 1972, Metallic mineral resources map of the Candle Quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-389, 1 sheet, scale 1:250,000. Cobb, E.H., 1973, Placer deposits of Alaska: U.S. Geological Survey Bulletin 1374, 213 p. Cobb, E.H., 1975, Tungsten occurrences in Alaska: U.S. Geological Survey Mineral Investigations Resource Map MR-66, 1 sheet, scale 1:250,000. Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Candle, Holy Cross, Norton Bay, Nulato, and Unalakleet quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-866, 102 p. Gault, H.R., Killeen, P.L., West, W.S., and others, 1953, Reconnaissance for radioactive deposits in the northeastern part of the Seward Peninsula, Alaska, 1945-47 and 1951: U.S. Geological Survey Circular 250, 31 p.