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Unnamed (in headwaters of Surprise Creek)

Occurrence, Inactive

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Commodities and mineralogy

Main commodities Cu
Other commodities Ag
Ore minerals chalcopyrite; malachite
Gangue minerals carbonate; chlorite

Geographic location

Quadrangle map, 1:250,000-scale SO
Quadrangle map, 1:63,360-scale D-5
Latitude 64.799
Longitude -164.127
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is on the ridgecrest between the headwaters of Surprise Creek (a tributary to Big Four Creek) and Military Creek (a tributary to Birch Creek), at an elevation of 1,675 feet. This is locality 97 of Gamble (1988).

Geologic setting

Geologic description

A sample of iron-stained carbonate-chlorite schist contained 1 percent Cu, 5 ppm Ag, 200 ppm Zn, and 12 ppm Bi (Gamble, 1988). Bedrock is part of a metavolcanic assemblage thought to be Ordovician in age (Till and others, 1986).
Geologic map unit (-164.12961272633, 64.7982608916959)
Mineral deposit model Chalcopyrite-bearing carbonate-chlorite schist; volcanogenic massive sulfide?; Kuroko massive sulfide (Cox and Singer, 1986; model 28a).
Mineral deposit model number 28a
Alteration of deposit Oxidized; iron-stained.

Production and reserves

Workings or exploration No exploration work is reported for this occurrence.
Indication of production None

References

MRDS Number 10308298

References

Gamble, B.M., 1988, Non-placer mineral occurrences in the Solomon, Bendeleben, and southern part of the Kotzebue quadrangles, western Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1838-B, 13 p., 1 sheet, scale 1:250,000.
Till, A.B., Dumoulin, J.A., Gamble, B. ., Kaufman, D.S., and Carroll, P.I., 1986, Preliminary geologic map and fossil data, Soloman, Bendeleben, and southern Kotzebue quadrangles, Seward Peninsula, Alaska: U.S. Geological Survey Open-File Report 86-276, 10 p., 3 plates, scale 1:250,000.
Reporters Travis L. Hudson (Applied Geology)
Last report date 8/19/1999