Unnamed (east of White River) (ARDF #MC102) Ag, Co, Cu

Unnamed (east of White River)

Occurrence, Inactive

Commodities and mineralogy

Main commodities	Ag; Co; Cu
Other commodities	As; Zn

Geographic location

Quadrangle map, 1:250,000-scale	MC
Quadrangle map, 1:63,360-scale	C-2
Latitude	61.7072
Longitude	-141.7439
Nearby scientific data	Find additional scientific data near this location
Location and accuracy	This occurrence is low on the east valley wall of the White River. It is at an elevation of about 4,100 feet, 3,600 feet northwest of elevation 6368 (Bend) and about 2,700 feet west-southwest of the center of section 11, T. 2 S., R. 20 E., of the Copper River Meridian. This is locality 154 of MacKevett (1976); the location is accurate to within 1,000 feet.

Geologic setting

Geologic description This occurrence is associated with altered and weakly mineralized rocks along a 160-foot-wide fault zone near or in the Totshunda fault zone (MacKevett, 1976, 1978). In this area, the Totshunda fault juxtaposes Triassic Nikolai Greenstone to the north against upper Paleozoic volcanic and sedimentary rocks to the south (MacKevett, 1978). A sample of the altered rocks contained 3 parts per million (ppm) silver, 300 ppm arsenic, 200 ppm cobalt, 200 ppm copper, and 200 ppm zinc (MacKevett, 1976).
Geologic map unit	(-141.7459988425, 61.706825744243)

Geologic description

This occurrence is associated with altered and weakly mineralized rocks along a 160-foot-wide fault zone near or in the Totshunda fault zone (MacKevett, 1976, 1978). In this area, the Totshunda fault juxtaposes Triassic Nikolai Greenstone to the north against upper Paleozoic volcanic and sedimentary rocks to the south (MacKevett, 1978). A sample of the altered rocks contained 3 parts per million (ppm) silver, 300 ppm arsenic, 200 ppm cobalt, 200 ppm copper, and 200 ppm zinc (MacKevett, 1976).

Geologic map unit

(-141.7459988425, 61.706825744243)

Production and reserves

Workings or exploration	Only limited surface sampling.
Indication of production	None
Additional comments The locality is in the Wrangell-Saint Elias National Park and Preserve.

References

References MacKevett, E.M., Jr., 1976, Mineral deposits and occurrences in the McCarthy quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-773-B, 2 sheets, scale 1:250,000. MacKevett, E.M., Jr., 1978, Geologic map of the McCarthy quadrangle, Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I-1032, 1 sheet, scale l:250,000.
Reporters	Travis L. Hudson (Applied Geology, Inc.)
Last report date	1/12/2003