|Quadrangle map, 1:250,000-scale||TK|
|Quadrangle map, 1:63,360-scale||B-1|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This placer prospect is on Pumicite Creek, a local name for a west tributary of Tyone Creek. The mouth of Pumicite Creek is about 2 miles downstream from the junction of Daisy Creek and Tyone Creek. The site is plotted at about the midpoint of the creek near the center of sec. 16, T. 6 N., R. 10 W., Copper River Meridian. The location is accurate to within 1/2 mile. The prospect is covered by the Pumicite claim.|
Geologic descriptionPumicite Creek drains an area of volcanic rocks, sandstone, and argillite of the Talkeetna Formation (Csejtey and others, 1978). Tertiary fluviatile conglomerate occurs south of the creek. Gold occurs in the alluvial gravels. The creek is less than 2 feet wide and has a gradient of 300 feet per mile (Kurtak and others, 1992). Stream-sediment samples collected by the U.S. Bureau of Mines contain 2.5 parts per million gold (0.0001 ounce per cubic yard) and 10 parts per billion platinum (Balen, 1990).
|Geologic map unit||(-147.082604565181, 62.2969150539017)|
|Mineral deposit model||Placer Au (Cox and Singer, 1986; model 39a)|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary placer.|
|Workings or exploration||Apparently only limited sampling by the U.S. Bureau of Mines (Balen, 1990).|
|Indication of production||None|
Additional commentsMAS/MILS number 20760066.
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|