Unnamed (south flank of Mount Watana) (ARDF #TK064) Cu, Ni

Unnamed (south flank of Mount Watana)

Occurrence, Inactive

Commodities and mineralogy

Main commodities	Cu; Ni
Other commodities	Cr
Ore minerals	chalcopyrite; pyrite
Gangue minerals	epidote

Geographic location

Quadrangle map, 1:250,000-scale	TK
Quadrangle map, 1:63,360-scale	C-3
Latitude	62.7021
Longitude	-148.1157
Nearby scientific data	Find additional scientific data near this location
Location and accuracy	This occurrence is at an elevation of about 4,100 feet, approximately 1.4 miles south of the summit of Mt. Watana, near the center of sec. 10, T. 30 N., R. 7 E. of the Seward Meridian. The location is accurate to within 1/4 mile.

Geologic setting

Geologic description At this occurrence, epidotized Triassic microgabbro contains pyrite and chalcopyrite(?). A U.S. Geological Survey rock sample contains 245 parts per million copper, 303 parts per million chromium, and 156 parts per million nickel (J. Schmidt, written communication, 2001).
Geologic map unit	(-148.11792840171, 62.7016322024499)
Mineral deposit model	Komatiitic Ni-Cu (Cox and Singer, 1986; model 6a)
Mineral deposit model number	6a
Age of mineralization	In Triassic metagabbro.
Alteration of deposit	The gabbro is epidotized.

Production and reserves

Workings or exploration	Surface sampling only.
Indication of production	None

References

References 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