|Quadrangle map, 1:250,000-scale||TK|
|Quadrangle map, 1:63,360-scale||D-5|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence represents several sites where placer samples were collected in north-flowing tributaries along an 8-mile-long section of the Susitna River in Devils Canyon. The sites extend upstream from the west edge of sec. 31; the midpoint of these sites is in the SW1/4 sec. 2, T. 31 N., R. 1 E., Seward Meridian.|
Geologic descriptionGold and platinum occur in alluvial gravel deposits in north-flowing tributaries to the Susitna River in Devils Canyon (Kurtak and others, 1992). Stream-sediment samples collected from several sites along the Susitna River contain up to 0.002 ounce of gold per cubic yard, 120 parts per million silver, 0.2 percent copper, 0.2 percent zinc, 180 parts per million tin, and 0.86 part per million platinum. The rocks in the area consist of Tertiary granodiorite (Csejtey and others, 1978).
|Geologic map unit||(-149.231756452504, 62.8011181624636)|
|Mineral deposit model||Placer Au-PGE (Cox and Singer, 1986; model 39a)|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary.|
|Workings or exploration||Sampling of alluvial gravel by U.S. Bureau of Mines (Kurtak and others, 1991).|
|Indication of production||None|
Additional commentsMAS/MILS number 20760083.
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||9/30/2002|