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  3. Alaska Resource Data File (ARDF)

Unnamed (north of upper Eagle Creek)

Occurrence, Inactive

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Commodities and mineralogy

Main commodities Sb
Other commodities As; Au; W
Ore minerals stibnite
Gangue minerals calcite; quartz

Geographic location

Quadrangle map, 1:250,000-scale MC
Quadrangle map, 1:63,360-scale B-4
Latitude 61.3416
Longitude -142.3314
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is on the ridge north of upper Eagle Creek. It is at an elevation of about 7,000 feet, 2,500 feet west-southwest of elevation 7415 near the southeast corner of section 15, T. 6 S., R. 17 E. of the Copper River Meridian. This is locality 50 of MacKevett (1976); the location is accurate to within a few hundred feet.

Geologic setting

Geologic description

This occurrence consists of a series of stibnite-bearing quartz-calcite veins up to 25 centimeters thick that cut Triassic Nizina Limestone (MacKevett and Smith, 1972; MacKevett, 1976). Samples from this occurrence contain up to 1.2 parts per million (ppm) gold, 700 ppm arsenic, more than 10,000 ppm antimony, and 7,000 ppm tungsten (MacKevett and Smith, 1968, samples 62, 63, 65, and 66). The host rocks are Triassic limestone but other gold-bearing veins in the area (such as MC173) are Tertiary.
Geologic map unit (-142.333443556842, 61.3411768727396)
Mineral deposit model Vein
Age of mineralization Tertiary? The host rocks are Triassic but other gold-bearing veins in the area (such as MC173) are Tertiary.

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

MRDS Number A011695

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., and Smith, J.G., 1968, Distribution of gold, copper, and some other metals in the McCarthy B-4 and B-5 quadrangles, Alaska: U.S. Geological Survey Circular 604, 25 p.
MacKevett, E.M., Jr., and Smith, J.G., 1972, Geologic map of the McCarthy B-4 quadrangle, Alaska: U.S. Geological Survey Geologic Quadrangle Map GQ-943, 1 sheet, scale 1:63,360.
Reporters Travis L. Hudson (Applied Geology, Inc.)
Last report date 1/12/2003