|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 occurrence is on Black River, 3 to 4 miles upstream from the Oshetna River. It is near the center of sec. 35, T. 28 N., R. 10 E., Seward Meridian. The location is accurate to within 1/2 mile.|
Geologic descriptionGold occurs in alluvial gravel that consists mainly of granitic cobbles with fewer gneiss cobbles (Kurtak and others, 1992) Placer samples collected by the U.S. Bureau of Mines contain up to 0.001 ounce of gold per cubic yard and 1,234 parts per million tungsten (Kurtak and others, 1992). They describe the gold in the samples as 'fine flood gold.' The small size of the placer gold particles could make recovery difficult . Exploration took place in the area from 1975 to 1979.
|Geologic map unit||(-147.545502371681, 62.4654354820844)|
|Mineral deposit model||Placer Au (Cox and Singer, 1986; model 39a)|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary placer.|
|Workings or exploration||Exploration took place in the area from 1975 to 1979. The U.S. Bureau of collected placer samples (Kurtak and others, 1992).|
|Indication of production||None|
Additional commentsMAS/MILS number 20760097.
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|