|Quadrangle map, 1:250,000-scale||HU|
|Quadrangle map, 1:63,360-scale||B-2|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The exact location of this placer mine is vague. It is probably located on the south bank of the Koyukuk River, opposite the mouth of Mountain Creek. The location is accurate within 2 miles.|
Geologic descriptionEakin (1914) reported that some placer gold had been recovered on the south bank of the Koyukuk River. Reed (1938) mentions a bar deposit on the lower Koyukuk River, opposite Red Mountain, similar to other bar deposits along the river. Six panned-concentrate samples from a gravel bar in this area all contained very fine- to fine-grained gold. The best sample had 1 fine and 12 very fine flakes of gold; the concentrate was analyzed and contains 3,848 ppb gold (Kurtak and others, 2002).
|Geologic map unit||(-153.87353954736, 66.2855720795106)|
|Mineral deposit model||Placer Au (Cox and Singer, 1986; model 39a)|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary.|
|Workings or exploration||Surface mining.|
|Indication of production||Yes|
|Production notes||Minor production.|
Bottge, R.G., 1988, Maps summarizing land availability for mineral exploration and development in western Alaska, 1986: U.S. Bureau of Mines Open-File Report 14-88, 38 quadrangle overlays.
Cobb, E.H., 1972, Metallic mineral resources map of the Hughes quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-458, 1 sheet, scale 1:250,000.
Cobb, E.H., 1975, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in five quadrangles in west central Alaska (Hughes, Kotzebue, Melozitna, Selawik, Shungnak): U.S. Geological Survey Open-File Report 75-627, 58 p.
Cobb, E.H., 1977, Placer deposit map of central Alaska: U.S. Geological Survey Open-File Report 77-168-B, 64 p., 1 map, scale 1:1,000,000.
Eakin, H.M., 1914, Mineral resources of the Yukon-Koyukuk region: U.S. Geological Survey Bulletin 592-K, p. 371-384.
Eakin, H.M., 1916, Mineral resources of the Yukon-Koyukuk region: U.S. Geological Survey Bulletin 631, 88 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.
Heiner, L.E., and Wolff, E.N., eds., 1968, Mineral resources of northern Alaska, Final report, submitted to the NORTH Commission: University of Alaska, Mineral Industry Research Laboratory Report No. 16, 306 p.
Kurtak, J.M., Klieforth, R.F., Clark, J.M., and Maclean, E.A., 2002, Mineral investigations in the Koyukuk mining district, northern Alaska: Final Report: U.S. Bureau of Land Management Technical Report 50, v. 1 and 2, 845 p.
|Reporters||J.M. Britton (Anchorage)|
|Last report date||8/1/2002|