|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 at an elevation of about 5,000 feet on an unnamed, north-flowing tributary of Black River, about 4 1/2 miles south of Black Lake. The placer is at the creek junction in the NE1/4 sec. 23, T. 26 N., R. 8 E., Seward Meridian. The location is accurate.|
Geologic descriptionThis occurrence consists of placer gold and abundant garnet in pan concentrate samples from 2 forks at a stream junction (Clautice and others, 1990). A sample on the east fork contains 4,800 parts per billion gold, and at least 5 colors in the pan; a sample from the west fork contains more than 10,000 parts per billion ppb gold (or about 0.302 ounce of gold per ton) and abundant visible gold. The bedrock is Tertiary conglomerate cemented by limonite and hematite. A sample of the conglomerate did not contain anomalous metal values.
|Geologic map unit||(-147.910389386919, 62.3309296253232)|
|Mineral deposit model||Placer Au (Cox and Singer, 1986; model 39a)|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary placer.|
|Workings or exploration||Only limited sampling (Clautice and others, 1990).|
|Indication of production||None|
Clautice, K.H., Harris, E.E., Liss, S.A., Kline, J.T., Bundtzen, T.K., Gilbert, W.G., and Nye, C.J., 1990, Analytical results for rock, pan concentrate, and stream sediment samples from the Talkeetna Mountains B-2 quadrangle and the northern part of the Talkeetna Mountains A-2 quadrangle: Alaska Division of Geological and Geophysical Surveys, Public Data File 90-31, 23 p., 1 plate, 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|