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  3. Alaska Resource Data File (ARDF)

Spruce Creek

Occurrence, Inactive

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Commodities and mineralogy

Main commodities Cu
Ore minerals azurite; chalcopyrite; malachite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale SO
Quadrangle map, 1:63,360-scale D-5
Latitude 64.868
Longitude -164.198
Nearby scientific data Find additional scientific data near this location
Location and accuracy This is a lode prospect on the west slope of Spruce Creek valley; it is at an elevation of about 450 feet, 1.2 miles upstream from the mouth of Spruce Creek on the Casadepaga River. It is locality 10 of Cobb (1972, MF 445; 1978, OF 78-181).

Geologic setting

Geologic description

A zone of silicified rock, possibly replaced marble, near a contact with schist contains copper sulfides and carbonates (Smith, 1908; also see Mount Dixon, SO068). Bedrock in Spruce Creek is primarily part of a lower Paleozoic metasedimentary assemblage (Till and others, 1986).
Geologic map unit (-164.200617931957, 64.8672612534539)
Mineral deposit model Copper-bearing mineralization in silica-rich zones near marble/schist contact (also see Mount Dixon, SO068).

Production and reserves

Workings or exploration A little surface prospecting has probably taken place here.
Indication of production None

References

MRDS Number A012645

References

Cobb, E.H., 1972, Metallic mineral resources map of the Solomon quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-445, 1 sheet, scale 1:250,000.
Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Solomon quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-181, 185 p.
Smith, P.S., 1908, Investigations of mineral deposits of Seward Peninsula: U.S. Geological Survey Bulletin 345-E, p. 206-250.
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