Riley Creek

Mine, Inactive

Commodities and mineralogy

Main commodities Au
Ore minerals gold

Geographic location

Quadrangle map, 1:250,000-scale AR
Quadrangle map, 1:63,360-scale A-2
Latitude 67.039
Longitude -156.897
Nearby scientific data Find additional scientific data near this location
Location and accuracy Location at head of Riley Creek 3000 ft. (1 km) northeast of Shields Mountain in the Cosmos Hills, in T. 19 N., R. 9 E., Kateel River Meridian. Shown as locality 28 in Mayfield and Grybeck (1978). Location accurate to within 1000 ft. (300 m).

Geologic setting

Geologic description

Alluvial placer 200 m long, less than 10 m wide and about 2 m thick in high, steep and dry tributary to Riley Creek. Much of Au in bedrock crevices; also visible free Au is in quartz veins in drainage basin. Basin contains colluvium composed of slate, limestone and quartz gravel, and a few large greenstone boulders, up to 2 ft (0.6 m) in diameter, probably of glaciofluvial origin (Fritts, 1970, p. 58).
Geologic map unit (-156.899741897684, 67.0384532750146)
Mineral deposit model Placer (Cox and Singer, 1986; model 39a).
Mineral deposit model number 39a

Production and reserves

Workings or exploration Surface.
Indication of production Yes; small

Additional comments

Area mined was a high, steep, and dry tributary of Riley Creek (Smith and Mertie, 1930, p. 336).