1. Mineral Resources
  2. Online Spatial Data
  3. Alaska Resource Data File (ARDF)

Unnamed (near upper Crystal Creek)

Occurrence, Undetermined

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Commodities and mineralogy

Main commodities Pb; Zn
Other commodities As; Fe
Ore minerals arsenopyrite; galena; pyrite; sphalerite

Geographic location

Quadrangle map, 1:250,000-scale TY
Quadrangle map, 1:63,360-scale C-8
Latitude 61.53
Longitude -152.99
Nearby scientific data Find additional scientific data near this location
Location and accuracy Reed and Elliott (1970, S-30, p.21) collected a float sample with visible base metal sulfides from a tributary to Upper Crystal Creek, near the western boundary of the Tyonek Quadrangle at about the center of the north side of sec. 25, T. 17 N., R. 21 W. (Cobb, 1972, MF 385, locality 3 and U.S. Bureau of Mines, 1998, MAS # 0020840003). Location is approximate to within a one mile radius.

Geologic setting

Geologic description

Boulder of altered, sheared, fine-grained igneous rock contains 2 percent disseminated pyrite, 1 to 2 percent galena, and traces of sphalerite and arsenopyrite (Reed and Elliott, 1970, S-30, p. 21).
Geologic map unit (-152.992187441749, 61.5293876832669)
Mineral deposit model Unknown.

Production and reserves

Indication of production None

References

MRDS Number A106251

References

Cobb, E.H., 1972, Metallic mineral resources map of the Tyonek quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-385, 1 sheet, scale 1:250,000.
Cobb, E.H., 1979, Summary of references to mineral occurrences (other than minerals fuels and construction materials) in the Kenai and Tyonek Quadrangles, Alaska: U.S. Geological Survey Open-File Report 80-86, 36 p.
Reed, B.L., and Elliott, R.L., 1970, Reconnaissance geologic map, analyses of bedrock and stream sediment samples, and an aeromagnetic map of parts of the southern Alaska Range: U.S. Geological Survey Open-file Report 70-271, 24 p., 4 sheets, scale 1:250,000.
U.S. Bureau of Mines, 1998, Minerals Availability System/Minerals Industry Location System (MAS/MILS), Talkeetna quadrangle: Worldwide Web URL http://imcg.wr.usgs.gov/data.html.
Reporters Madelyn Millholland (Anchorage), James Riehle (USGS)
Last report date 6/1/1998