Mascot Gulch

Mine, Inactive

Commodities and mineralogy

Main commodities Au
Other commodities Sn
Ore minerals cassiterite; gold

Geographic location

Quadrangle map, 1:250,000-scale BN
Quadrangle map, 1:63,360-scale C-6
Latitude 65.74
Longitude -164.97
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 setting

Geologic description

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. 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

Production and reserves

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

References