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Unnamed (on west tributary to Kosina Creek)

Occurrence, Inactive

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Commodities and mineralogy

Main commodities Pd
Other commodities As; Cu

Geographic location

Quadrangle map, 1:250,000-scale TK
Quadrangle map, 1:63,360-scale B-3
Latitude 62.4267
Longitude -148.1706
Nearby scientific data Find additional scientific data near this location
Location and accuracy This placer occurrence is on a west tributary of Kosina Creek, at an elevation of about 3,650 feet,. It is near the center of sec. 16, T. 27 N., R. 7 E., Seward Meridian. The location is accurate to within 1/2 mile.

Geologic setting

Geologic description

The stream drains an area underlain by plutonic and metamorphic rocks, including banded gneiss (Kurtak and others, 1992). Placer samples collected by the U.S. Bureau of Mines contained up to 24 parts per billion palladium and 100 parts per million arsenic (Balen, 1990). A sample of intrusive rock contains 813 parts per million copper.
Geologic map unit (-148.172808342533, 62.4262224393308)
Mineral deposit model Placer PGE (Cox and Singer, 1986; model 39b)
Mineral deposit model number 39b
Age of mineralization Quaternary placer.

Production and reserves

Workings or exploration Placer samples collected by the U.S. Bureau of Mines (Balen, 1990).
Indication of production None

Additional comments

MAS/MILS number 20760082.

References

References

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.
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 10/3/2002