|Quadrangle map, 1:250,000-scale||TK|
|Quadrangle map, 1:63,360-scale||A-5|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is at an elevation of about 2,950 feet on the west valley wall of upper Sheep River. The occurrence is in the southeast corner of sec. 33, T. 24 N., R. 2 E., Seward Meridian. The location is accurate to within 1/2 mile. This is locality 98 of Csejtey and Miller (1978) and Singer and others (1978).|
Geologic descriptionThis occurrence consists of malachite-stained float of Cretaceous or Paleocene tonalite (Cobb and Csejtey, 1980). A float sample contains 10 parts per million silver, 0.35 part per million gold, and 5,000 parts per million copper (Miller and others, 1978).
|Geologic map unit||(-149.090508383242, 62.1218920501058)|
|Mineral deposit model||Porphyry copper-gold (Cox and Singer, 1986; model 20c)|
|Mineral deposit model number||20c|
|Age of mineralization||Cretaceous or younger; quartz veins(?) cut plutonic rocks of this age.|
|Alteration of deposit||Oxidation of copper minerals.|
|Workings or exploration||Only limited surface sampling by U.S. Geological Survey (Miller and others, 1978).|
|Indication of production||None|
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.
Miller, R.J., Cooley, E.F., O'Leary, R.M., Garmezy, Larry, Csejtey, Bela, Jr., Smith, T.E., and Cleveland, M.N., 1978, Analysis of geochemical samples from the Talkeetna Mountains quadrangle, Alaska: U.S. Geological Survey Open-file Report 78-1052, 279 p., 3 sheets, scale 1:250,000.
|Reporters||D. Bickerstaff (U.S. Geological Survey)|
|Last report date||10/1/2002|