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  3. Alaska Resource Data File (ARDF)

Unnamed (west of lake 2710)

Occurrence, Inactive

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Commodities and mineralogy

Main commodities Cu
Other commodities Au; Mo
Ore minerals malachite; pyrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale TK
Quadrangle map, 1:63,360-scale C-4
Latitude 62.5567
Longitude -148.9242
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 3,400 feet, 1/2 mile west of the north end of lake 2710. The occurrence is in the SE1/4 sec. 32, T. 29 N., R. 3 E., Seward Meridian. The location is accurate to within 1/4 mile. This is locality 43 of Csejtey and Miller (1978).

Geologic setting

Geologic description

This occurrence consists of pyrite-bearing quartz veinlets that cut pyritic, malachite-stained, alteration zones in mafic metavolcanic rocks. Samples collected by the U.S. Geological Survey contain up to 1,000 parts per million copper, 10 parts per million molybdenum, and 0.05 part per million gold (Miller and others, 1978).
Geologic map unit (-148.926435046318, 62.5562151620475)
Mineral deposit model Basaltic Cu? (Cox and Singer, 1986; model 23?)
Mineral deposit model number 23?
Alteration of deposit The mafic metavolcanic rocks are altered, but the type of alteration is not specified (Csejtey and Miller, 1978). Oxidation of copper mineral.

Production and reserves

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

References

MRDS Number A012172

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