|Quadrangle map, 1:250,000-scale||TK|
|Quadrangle map, 1:63,360-scale||A-2|
|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 descriptionThe 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.|
|Workings or exploration||Stream-sediment sampling by the U.S. Bureau of Mines (Kurtak and others, 1992).|
|Indication of production||None|
Additional commentsMAS/MILS number 20760100.
Csejtey, Bela, Jr., Nelson, W.H., Jones, D.L., Silberling, N.J., Dean, R.M., Morris, M.S., Lanphere, M.A., Smith, J.G., and Silberman, M.L, 1978, Reconnaissance geologic map and geochronology, Talkeetna Mountains quadrangle, northern part of Anchorage quadrangle, and southwest part of Healy quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-558-A, 60 p., 1 sheet, scale 1:250,000.
|Reporters||R.K. Rogers (U. S. Geological Survey contractor)|
|Last report date||10/3/2002|