Stuyahok River Gold

Mine, Active

Commodities and mineralogy

Main commodities Au
Other commodities Hg
Ore minerals cinnabar; gold

Geographic location

Quadrangle map, 1:250,000-scale HC
Quadrangle map, 1:63,360-scale A-4
Latitude 62.06083
Longitude -160.9642
Nearby scientific data Find additional scientific data near this location
Location and accuracy USGS MF-376, Loc. 2. Location is at Stuyahok Mines symbol on Holy Cross A-4 topographic map.

Geologic setting

Geologic description

The area is underlain mainly by andesitic to dacitic flows and agglomerates, andesitic and felsic tuffs, volcaniclastic sandstones and siltstones, and graywacke of the Jurassic and Lower Cretaceous Koyukuk terrane. Scattered throughout the area are younger (Tertiary?) felsic and mafic dikes which cut the older rocks. A complete geologic description of the Stuyahok area is available in USGS Open-File Report 96-505-A (Miller and others, 1996) .
Geologic map unit (-160.966576481685, 62.0601004010274)
Mineral deposit model Placer Au (Cox and Singer, 1986; model 39a).
Mineral deposit model number 39a
Age of mineralization Tertiary/Quaternary

Production and reserves

Workings or exploration Surface: Hydraulic and dragline methods used. Drilling and sampling was done in gold placer deposits in 1994 by a crew from Calista Corporation and in 1995 by the USGS and Calista Corporation. A cut was leased and mined from 1994 through 1996.
Indication of production Yes; small
Production notes Cobb (1973) estimated production at 23,000 - 30,000 oz. of Au. Mined from 1921-1940.

References