Tuluksak River (below Granite Creek)

Prospect, Inactive

Commodities and mineralogy

Main commodities Au
Ore minerals gold

Geographic location

Quadrangle map, 1:250,000-scale BH
Quadrangle map, 1:63,360-scale D-4
Latitude 60.969
Longitude -160.1994
Nearby scientific data Find additional scientific data near this location
Location and accuracy Maddren (1915) located this placer prospect near the Tuluksak River about 5 miles downstream from the mouth of Granite Creek (BH015). The coordinates given here are at about this location, about 0.6 mile southwest of the center of section 12, T. 10 N., R. 62 W. However, there is no other reference to this prospect and its exact location is uncertain. This is locality 9 of Cobb (1972 [MF 455]) and of Hoare and Cobb (1977).

Geologic setting

Geologic description

Maddren (1915) reported that fine gold was found in a 50-foot prospect shaft through frozen ground near the Tuluksak River about 5 miles below the mouth of Granite Creek (BH015). The prospect is on the lower part of the river, where the gradient decreases as it enters onto the lowlands of the lower Kuskokwim River. The low elevation and proximity to the Kuskokwim River lowlands suggest that Quaternary sea level fluctuations could have influenced placer development on the lower Tuluksak River. There apparently has been no other work on the Tuluksak River below the mouth of Granite Creek.
Geologic map unit (-160.201695495671, 60.9682663008885)
Mineral deposit model Placer Au (Cox and Singer, 1986; model 39a).
Mineral deposit model number 39a
Age of mineralization Quaternary.

Production and reserves

Workings or exploration A 50-foot prospecting shaft was dug before 1915 through frozen ground.
Indication of production None


MRDS Number A013387
Reporters Travis L. Hudson (Applied Geology); D.J. Grybeck (Port Ludlow, WA)
Last report date 3/4/2008