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Su

Occurrence, Inactive

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Commodities and mineralogy

Main commodities Au; Cu
Ore minerals chalcopyrite; pyrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale TK
Quadrangle map, 1:63,360-scale D-2
Latitude 62.7763
Longitude -147.8396
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 2,000 feet on the north bank of the Susitna River, 1 mile east of the mouth of Jay Creek. The location is accurate to within 1/4 mile. This is locality 26 of Csejtey and Miller (1978).

Geologic setting

Geologic description

The Su occurrence consists of minor chalcopyrite and pyrite in a small quartz vein that cuts mafic metavolcanic rocks of Paleozoic age (Csejtey and Miller, 1978). A sample of the vein contains 1,000 parts per million copper and 0.05 parts per million gold (Miller and others, 1978).
Geologic map unit (-147.841829560842, 62.7758385251588)
Mineral deposit model Basaltic Cu, Polymetallic vein, or Gold-quartz vein (Cox and Singer, 1986; model 23, 22c, or 36a)
Mineral deposit model number 23, 22c, or 36a

Production and reserves

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

Additional comments

MAS/MILS number 20760092.

References

MRDS Number A012171

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 10/2/2002