|Quadrangle map, 1:250,000-scale||SO|
|Quadrangle map, 1:63,360-scale||C-5|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||West Creek is a west tributary to Shovel Creek (SO017). Placer mining took place over about the lower 1.5 miles of the creek, between elevations of 175 to 300 feet. This is locality 87 of Cobb (1972, MF 445; 1978, OF 78-181).|
Geologic descriptionPlacer mining took place over about the lower 1.5 miles of the West Creek, between elevations of 175 to 300 feet. Gold-bearing gravels were 3 to 4 feet thick on bedrock; gold coarseness increased upstream. Crevices and cracks in marble bedrock locally controled gold deposition and gold was concentrated on a false clay bedrock in places. A 0.2 ounce gold nugget with quartz was found embedded in schist and heavy mineral concentrate contained arsenopyrite, chalcopyrite, garnet, magnetite, and pyrite (Brooks and others, 1901). Bedrock is part of a lower Paleozoic metasedimentary assemblage (Sainsbury and others, 1972, OFR 511; Till and others, 1986).
|Geologic map unit||(-164.458614553365, 64.6762550687442)|
|Mineral deposit model||Placer Au-PGE (Cox and Singer, 1986; model 39a).|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary.|
|Workings or exploration||Placer mining was mostly by small-scale methods but a dryland-dredge on tracks operated in 1908-11. Some open-cut (dozer?) mining took place in the 1930s (Cobb, 1978, OF 78-181).|
|Indication of production||Yes; small|
Brooks, A.H., Richardson, G.B., Collier, A.J., and W.C. Mendenhall, 1901, A reconnaissance in the Cape Nome and adjacent gold fields of Seward Peninsula, Alaska, in 1900: U.S. Geological Survey Special Publication, p. 1-185, maps.
Cobb, E.H., 1972, Metallic mineral resources map of the Solomon quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-445, 1 sheet, scale 1:250,000.
Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Solomon quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-181, 185 p.
Sainsbury, C.L., Hudson, T.L., Ewing, R., and Marsh, W.R., 1972, Reconnaissance geologic maps of the Solomon D-5 and C-5 quadrangles, Seward Peninsula, Alaska: U.S. Geological Survey Open-File Report 72-324, 12 p., 2 sheets, scale 1:63,360.
|Reporters||Travis L. Hudson (Applied Geology)|
|Last report date||8/19/1999|