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  3. Alaska Resource Data File (ARDF)

Unnamed (near Devils Canyon)

Occurrence, Inactive

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Commodities and mineralogy

Main commodities Ag
Other commodities Cu; Zn
Ore minerals pyrite

Geographic location

Quadrangle map, 1:250,000-scale TK
Quadrangle map, 1:63,360-scale D-5
Latitude 62.8226
Longitude -149.2926
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 1,200 feet in Devils Canyon of the Susitna River. It is on the north wall of the canyon near the tip of a prominent bend in the river in the NE1/4 sec. 32, T. 32 N., R. 1 E., Seward Meridian. The location is accurate to within 1/2 mile.

Geologic setting

Geologic description

This rocks in the area are dark gray to black argillite, lithic graywacke, and polymictic pebble conglomerate, with a few thin beds of chert and limestone (Kurtak and others, 1992). An iron-stained rhyolite dike cuts silicified and pyrite-bearing argillite. Selected samples contain up to 2 parts per million silver, 209 parts per million copper, and 205 parts per million zinc (Balen, 1990).
Geologic map unit (-149.294859404446, 62.8221179073885)
Mineral deposit model Polymetallic vein? (Cox and Singer, 1986; model 22c?)
Mineral deposit model number 22c?
Alteration of deposit Iron-oxides and silicification.

Production and reserves

Workings or exploration Only rock sampling by U.S. Bureau of Mines (Balen, 1990).
Indication of production None

Additional comments

MAS/MILS number 20760107.

References

MRDS Number A106273

References

Balen, M.D., 1990, Geochemical sampling results from Bureau of Mines investigations in the Valdez Creek mining district, Alaska: U.S. Bureau of Mines Open-File Report 34-90, 218 p., 2 sheets, scale 1:63,360.
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.
Kurtak, J.M., Southworth, D.D., Balen, M.D., and Clautice, K.H., 1991, Mineral investigations in the Valdez Creek Mining District, south-central Alaska: U.S. Bureau of Mines Open-File Report 1-92, 658 p., 2 sheets, scale 1:250,000.
Reporters R.K. Rogers (U. S. Geological Survey contractor)
Last report date 9/30/2002