|Quadrangle map, 1:250,000-scale||TK|
|Quadrangle map, 1:63,360-scale||D-4|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is at an elevation of about 1,500 feet on the north bank of Fog Creek, 1.4 miles south-southeast of hill 2630. The location is accurate to within 1/4 mile.|
Geologic descriptionThe rocks in the area of this occurrence are Triassic(?) limestone, siltstone and chert, with very fine grained, crossbedded, dark gray limestone and gray argillite interlayered with dark red weathering, gray-green chert (J. Schmidt, written communication, 2001). Locally, yellow-green-weathered material occurs below limestone horizons and red-weathering, altered material occurs in limestone- siltstone outcrops. Chert and shale are marked by yellow efflorescence, and interlayered gray argillite and chert are marked by white efflorescence. Iron-stained, silicified argillite contains 2-3 percent fine-grained pyrite. Samples of altered sedimentary rocks contain up to 1,110 parts per million zinc, 0.4 part per million gold, 1.1 parts per million silver, and 205 parts per million nickel (J. Schmidt, written communication, 2001).
|Geologic map unit||(-148.584642278126, 62.7592262078969)|
|Alteration of deposit||Zones of red or yellow-green weathering or alteration; yellow and white efflorescence; and iron staining (J. Schmidt, written communication, 2001).|
|Workings or exploration||Only surface sampling by U.S. Geological Survey (J. Schmidt, written communication, 2001).|
|Indication of production||None|
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||10/4/2002|