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  3. Alaska Resource Data File (ARDF)

Unnamed (north of Hancock Pass)

Occurrence, Inactive

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Commodities and mineralogy

Main commodities Cu
Ore minerals malachite

Geographic location

Quadrangle map, 1:250,000-scale MC
Quadrangle map, 1:63,360-scale B-4
Latitude 61.361
Longitude -142.4174
Nearby scientific data Find additional scientific data near this location
Location and accuracy This prospect is on the north side of Hancock Pass. It is at an elevation of about 4,400 feet, 5,000 feet south-southwest of Joshua Green Peak, in the SW1/4 of section 8, T. 6 S., R. 17 E. of the Copper River Meridian. This is locality 52 of MacKevett (1976); the location is probably accurate to within a few hundred feet.

Geologic setting

Geologic description

The deposit at this prospect consists of minor copper-staining (malachite?) in Triassic Chitistone Limestone. It was explored by a now-caved shaft. (MacKevett and Smith, 1972; MacKevett, 1976). Copper mineralization is widespread in the Triassic Nikolai Greenstone and Triassic Chitistone Limestone. It is thought to have accompanied regional deformation and low-grade metamorphism in the Late Jurassic to Early Cretaceous (MacKevett and others, 1997).
Geologic map unit (-142.419448746343, 61.360573847713)
Age of mineralization Cretaceous? Copper mineralization is widespread in the Triassic Nikolai Greenstone and Triassic Chitistone Limestone. It is thought to have accompanied regional deformation and low-grade metamorphism in the Late Jurassic to Early Cretaceous (MacKevett and others, 1997).
Alteration of deposit Oxidation.

Production and reserves

Workings or exploration There is a caved exploration shaft near this deposit.
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., 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