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  3. Alaska Resource Data File (ARDF)

Unnamed (north of Talkeetna River)

Occurrence, Inactive

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Commodities and mineralogy

Main commodities Ag; Cu
Other commodities Co; Ni
Ore minerals limonite; malachite; pyrite

Geographic location

Quadrangle map, 1:250,000-scale TK
Quadrangle map, 1:63,360-scale C-4
Latitude 62.5043
Longitude -148.7151
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 2,800 feet, 1 mile north of the Talkeetna River, near the center of the NE1/4 sec. 21, T. 28 N., R. 4 E., Seward Meridian. The location is accurate to within 1/4 mile. This is locality 45 of Csejtey and Miller (1978).

Geologic setting

Geologic description

This occurrence consists of a small brecciated shear zone with pyrite, limonite, and malachite, in mafic metavolcanic rock (Csejtey and Miller, 1978). U.S. Geological Survey samples contain up to 10 parts per million silver, 70 parts per million nickel, 30 parts per million cobalt, and more than 20,000 parts per million copper (Miller and others, 1978).
Geologic map unit (-148.717324463127, 62.5038174945563)
Mineral deposit model Basaltic Cu? (Cox and Singer, 1986; model 23?)
Mineral deposit model number 23?
Alteration of deposit Oxidation of iron and copper minerals.

Production and reserves

Workings or exploration Only rock samples collected by the U.S. Geological Survey (Miller and others, 1978).
Indication of production None

References

MRDS Number A012167

References

Cobb, E.H., and Csejtey, Bela, Jr., 1980, Summaries of data on and lists of references to metallic and selected nonmetallic mineral deposits in the Talkeetna Mountains quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-716, 63 p.
Csejtey, Bela, Jr., and Miller, R.J., 1978, Map and table describing metalliferous and selected nonmetalliferous mineral deposits in the Talkeetna Mountains quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-558-B, 22 p., 1 sheet, scale 1:250,000.
Csejtey, Bela, Jr., Nelson, W.H., Jones, D.L., Silberling, N.J., Dean, R.M., Morris, M.S., Lanphere, M.A., Smith, J.G., and Silberman, M.L, 1978, Reconnaissance geologic map and geochronology, Talkeetna Mountains quadrangle, northern part of Anchorage quadrangle, and southwest part of Healy quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-558-A, 60 p., 1 sheet, scale 1:250,000.
Miller, R.J., Cooley, E.F., O'Leary, R.M., Garmezy, Larry, Csejtey, Bela, Jr., Smith, T.E., and Cleveland, M.N., 1978, Analysis of geochemical samples from the Talkeetna Mountains quadrangle, Alaska: U.S. Geological Survey Open-file Report 78-1052, 279 p., 3 sheets, scale 1:250,000.
Singer, D.A., Csejtey, Bela, Jr., and Miller, R.J., 1978, Map and discussion of the metalliferous and selected non-metalliferous mineral resources of the Talkeetna Mountains quadrangle, Alaska: U.S. Geological Survey Open-file Report 78-558-Q, 33 p., 1 sheet, scale 1:250,000.
Reporters R.K. Rogers (U. S. Geological Survey contractor)
Last report date 10/1/2002