|Quadrangle map, 1:250,000-scale||TK|
|Quadrangle map, 1:63,360-scale||B-2|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This placer prospect and the mining claims on it are on the Oshetna River, upstream from the mouth of the Little Oshetna R River . It is on the east side of sec. 1, T. 26N., R. 10 E., Seward Meridian. The location is accurate to within 1/2 mile.|
Geologic descriptionThe upper part of the Oshetna River drains an area of Tertiary volcanic rocks and remnants of Quaternary landslides and glacial deposits (Kurtak and others, 1992). Near Roaring Creek, the rocks includes Tertiary fluviatile conglomerate; below Roaring Creek, the rocks includes volcanic rocks, sandstone, and argillite of the Jurassic, Talkeetna Formation. The river contains extensive gravel deposits 100 to 1000 feet wide and 10 to 40 feet thick (Kurtak and others, 1992). The gradient of the river is 20 to 130 feet per mile. Gold occurs in the alluvial gravel deposits. Stream-sediment samples collected by the U.S. Bureau of Mines contain 2.2 parts per million gold (Balen, 1990).
|Geologic map unit||(-147.49750531735, 62.3645241967746)|
|Mineral deposit model||Placer Au (Cox and Singer, 1986; model 39a)|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary placer.|
|Workings or exploration||Placer claims were staked in 1973. The Bureau of Mines sampled the gravel in the river (Balen, 1990).|
|Indication of production||None|
Additional commentsMAS/MILS number 20760055.
Balen, M.D., 1990, Geochemical sampling results from Bureau of Mines investigations in the Valdez Creek mining district, Alaska: U.S. Bureau of Mines Open-File Report 34-90, 218 p., 2 sheets, scale 1:63,360.
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||10/2/2002|