|Quadrangle map, 1:250,000-scale||BN|
|Quadrangle map, 1:63,360-scale||C-6|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||Mascot Gulch is a small north tributary to Washington Creek in the northwest corner of the Bendeleben C-6 quadrangle. Washington Creek is the northwest headwater tributary of Kougarok River. The mouth of Mascot Gulch is about 3.5 miles upstream from the mouth of Washington Creek. This is locality 21 of Cobb (1972; MF 417; 1975; OFR 75-429).|
Geologic descriptionSainsbury and others (1969) show about 1,500 feet of placer mine workings along the channel of Mascot Gulch starting about 1,000 feet upstream from its mouth. Initial mining took place here at least by 1906 (Brooks, 1907) and unlike many gold placers in the upper Kougarok River drainage, the deposit on Mascot Gulch seems to be residual and close to its bedrock source. The bright, angular gold, some with crystal faces, occurs in irregular patches on phyllitic schist bedrock (Collier and others, 1908). Bedrock contains many quartz stringers and mining worked 2 to 3 feet of talus and decomposed bedrock. Considerable cassiterite was present in the placer concentrates (Collier and others, 1908). Bedrock in the area is part of a Lower Paleozoic metasedimentary assemblage (Till and others, 1986).
|Geologic map unit||(-164.972700721498, 65.7392756980875)|
|Mineral deposit model||Placer Au-PGE (partly residual; Cox and Singer, 1986; model 39a)|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary|
|Workings or exploration||Sainsbury and others (1969) show about 1,500 feet of placer mine workings along the channel of Mascot Gulch starting about 1,000 feet upstream from its mouth.|
|Indication of production||Yes; small|
Brooks, A.H., 1907, The Alaskan mining industry in 1906: U.S. Geological Survey Bulletin 314-A, p. 19-39.
Cobb, E.H., 1972, Metallic mineral resources map of the Bendeleben quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-417, 1 sheet, scale 1:250,000.
Cobb, E.H., 1975, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Bendeleben quadrangle, Alaska: U.S. Geological Survey Open-File Report 75-429, 123 p.
Collier, A.J., Hess, F.L., Smith, P.S., and Brooks, A.H., 1908, The gold placers of parts of Seward Peninsula, Alaska, including the Nome, Council, Kougarok, Port Clarence, and Goodhope precincts: U.S. Geological Survey Bulletin 328, 343 p.
Sainsbury, C.L., Kachadoorian, Reuben, Hudson, Travis, Smith, T.E., Richards, T.R., and Todd, W.E., 1969, Reconnaissance geologic maps and sample data, Teller A-1, A-2, A-3, B-1, B-2, B-3, C-1, and Bendeleben A-6, B-6, C-6, D-5, and D-6 quadrangles. Seward Peninsula, Alaska: U.S. Geological Survey Open-File Report 69-236, 49 p., 12 sheets, scale 1:63,360.
|Reporters||Travis L. Hudson (Applied Geology)|
|Last report date||3/15/1999|