|Quadrangle map, 1:250,000-scale||TK|
|Quadrangle map, 1:63,360-scale||D-3|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is at an elevation of about 3,300 feet, 5 miles east of Big Lake. The occurrence is in the SW1/4 sec. 24, T. 22 S., R. 3 W., Fairbanks Meridian. The location is accurate to within 1/4 mile. This occurrence has also been called the Watana Creek lode. This is locality 13 of Csejtey and Miller (1978).|
Geologic descriptionThis occurrence consists of pyrite in a silicified zone in a Tertiary granitic pluton that intrudes metabasalt and Lower Cretaceous argillite and lithic graywacke (Csejtey and others, 1978). The metabasalt next to the pluton is also silicified. A sample of felsic intrusive rock collected by the U.S. Geological Survey contains 2.5 parts per million gold and 0.5 parts per million silver (Miller and others, 1978). Samples of silicified granite and silicified wall rock collected by the U.S. Bureau of Mines contain up to 0.5 parts per million silver and 0.12 percent zinc; a placer sample contains 1,500 parts per billion gold (Kurtak and others, 1992).
|Geologic map unit||(-148.039853517655, 62.9892434500157)|
|Mineral deposit model||Porphyry Cu or Polymetallic vein? (Cox and Singer, 1986; model 20c or 22c?)|
|Mineral deposit model number||20c or 22c?|
|Alteration of deposit||Granite and metabasalt are silicified.|
|Workings or exploration||Limited sampling by the U.S. Geological Survey and U.S. Bureau of Mines (Miller and others, 1978; Kurtak and others, 1992).|
|Indication of production||None|
Additional commentsMAS/MILS number 20760112.
Cobb, E.H., and Csejtey, Bela, Jr., 1980, Summaries of data on and lists of references to metallic and selected nonmetallic mineral deposits in the Talkeetna Mountains quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-716, 63 p.
Csejtey, Bela, Jr., and Miller, R.J., 1978, Map and table describing metalliferous and selected nonmetalliferous mineral deposits in the Talkeetna Mountains quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-558-B, 22 p., 1 sheet, scale 1:250,000.
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., 1991, Mineral investigations in the Valdez Creek Mining District, south-central Alaska: U.S. Bureau of Mines Open-File Report 1-92, 658 p., 2 sheets, scale 1:250,000.
|Reporters||R.K. Rogers (U. S. Geological Survey contractor)|
|Last report date||10/2/2002|