|Quadrangle map, 1:250,000-scale||TK|
|Quadrangle map, 1:63,360-scale||D-2|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is at an elevation of about 3,150 feet on the southeast, valley wall of Jay Creek, about 3 miles northeast of its mouth on the Susitna River. The occurrence is near the center of the NW1/4 sec. 5, T. 31 N., R. 9 E., Seward Meridian. The location is accurate to within 1/8 mile. This is locality B33 of Kurtak and others (1992).|
Geologic descriptionThis deposit at this prospect consists of randomly oriented, pyrite-, pyrrhotite-, and bornite-bearing shear zones up to 7 feet wide, in andesitic metavolcanic rocks (Kurtak and others, 1992). The shear zones are exposed for about 50 feet. Samples of iron-stained rock collected by the U.S. Bureau of Mines contain up to 104 parts per million copper, 25 parts per billion gold, and 80 parts per million tungsten (Kurtak and others, 1992).
|Geologic map unit||(-147.810132131711, 62.8056398602199)|
|Mineral deposit model||Porphyry Cu-Au? (Cox and Singer, 1986; model 20c?)|
|Mineral deposit model number||20c?|
|Alteration of deposit||Silicification and iron staining in the shear zones (Kurtak and others, 1992).|
|Workings or exploration||Only sampling by the U.S. Bureau of Mines (Kurtak and others, 1992).|
|Indication of production||None|
Additional commentsMAS/MILS number 20760093.
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|