Coal Creek Occurrence, Valdez Creek District, Matanuska-Susitna Borough, Alaska, USA
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Location: This placer gold occurrence is on Coal Creek about 1.7 miles southwest of Coal Lake. The placer claims extend along the creek for about three miles; the coordinates are at about the center of the claims in the SW1/4 sec. 13, T. 32 N., R. 10 E., Seward Meridian. The location is accurate.
Geology: The rocks in the drainage of Upper Coal Creek are Cretaceous and Tertiary granitic rocks (Kurtak and others, (1992). Gold occurs in the alluvial gravel deposits. A placer sample collected by the U.S. Bureau of Mines from the south fork of Coal Creek contains 0.0008 ounce of gold per cubic yard (Kurtak and others, (1992).
Workings: Only limited placer sampling by U.S. Bureau of Mines (Kurtak and others, 1992).
Age: Quaternary placer.
Commodities (Major) - Au
Development Status: None
Deposit Model: Placer Au (Cox and Singer, 1986; model 39a)
1 entry listed. 1 valid mineral.
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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. Kurtak, J.M., Southworth, D.D., Balen, M.D., and Clautice, K.H., 1992, Mineral investigations in the Valdez Creek mining district, south-central Alaska: U.S. Bureau of Mines Open-File Report 1-92, 659 p., 2 plates, scale 1:250,000.