Upper Oshetna River

Occurrence, Inactive

Commodities and mineralogy

Main commodities Au
Other commodities Zn
Ore minerals gold

Geographic location

Quadrangle map, 1:250,000-scale TK
Quadrangle map, 1:63,360-scale A-2
Latitude 62.1066
Longitude -147.9719
Nearby scientific data Find additional scientific data near this location
Location and accuracy This placer occurrence on upper Oshetna River extends about a mile upstream from an elevation of 4,800 feet. The location is accurate.

Geologic setting

Geologic description

The rocks in the Upper Oshetna River drainage are Tertiary, felsic to mafic subaerial volcanic rocks and sub-volcanic intrusions (Csejtey and others, 1978). Gold occurs in the alluvial gravels. Stream-sediment samples collected by the U.S. Bureau of Mines contain 500-800 parts per million zinc; one sample that did not have visible gold had more than 10 parts per million gold (Kurtak and others, 1992).
Geologic map unit (-147.97410485411, 62.1060976926209)
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 Stream-sediment sampling by the U.S. Bureau of Mines (Kurtak and others, 1992).
Indication of production None

Additional comments

MAS/MILS number 20760100.

References