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Unnamed (northeast flank of Paxson Mountain)

Occurrence, Inactive

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Commodities and mineralogy

Main commodities Cu
Ore minerals chrysocolla
Gangue minerals epidote; prehnite; quartz

Geographic location

Quadrangle map, 1:250,000-scale MH
Quadrangle map, 1:63,360-scale A-4
Latitude 63.054
Longitude -145.5889
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of 3,600 feet on the northeast flank of Paxson Mountain, approximately one-half mile south of the Denali Highway. It is in the SE1/4NW1/4 section 35, T. 21 S., R. 11 E., Fairbanks Meridian. This occurrence corresponds to locality 6 in Rose and Saunders (1965) and to locality S92 in table 2 of Nokleberg and others (1991).

Geologic setting

Geologic description

This occurrence consists of a 2-foot pod of chrysocolla and quartz in a highly altered vesicular basalt of the Nikolai Greenstone of Late Triassic age (Rose and Saunders, 1965). A massive non-vesicular hornblende basalt or andesite dike (?) is exposed about 3 feet above the copper-bearing pod.
Geologic map unit (-145.591124397141, 63.0535796243084)
Mineral deposit model Basaltic Cu (Cox and Singer, 1986; model 23).
Mineral deposit model number 23
Age of mineralization Probably Cretaceous.
Alteration of deposit Alteration minerals noted in the basalt are quartz, epidote, and prehnite; copper mineral(s) are oxidized.

Production and reserves

Indication of production None

References

MRDS Number A011808

References

MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous and selected non-metalliferous mineral deposits in the eastern part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-A, 99 p., 1 sheet, scale 1:1,000,000.
Nokleberg, W.J., Lange, I.M., Roback, R.C., Yeend, Warren, and Silva, S.R., 1991, Map showing locations of metalliferous lode and placer mineral occurrences, mineral deposits, prospects, and mines, Mount Hayes quadrangle, eastern Alaska Range, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1996-C, 42 p., 1 sheet, scale 1:250,000.
Rose, A.W., and Saunders, R.H., 1965, Geology and geochemical investigations near Paxson, northern Copper River basin, Alaska: Alaska Division of Mines and Minerals Geological Report 13, 35 p.
Reporters W.T. Ellis (Alaska Earth Science), C.C. Hawley (Hawley Resource Group), and W.J. Nokleberg (USGS)
Last report date 6/18/2002