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  3. Alaska Resource Data File (ARDF)

Unnamed (west of Chitina River)

Occurrence, Inactive

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Commodities and mineralogy

Main commodities Cu; Mo
Ore minerals chalcopyrite; molybdenite

Geographic location

Quadrangle map, 1:250,000-scale VA
Quadrangle map, 1:63,360-scale B-1
Latitude 61.495
Longitude -144.259
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is located on a low ridge along the west side of the Chitina River, about 500 feet south of the north boundary of the Valdez B-1 topographic map. It is in the NE1/4 section 26, T. 4 S., R. 6 E., of the Copper River Meridian. This prospect is probably located to within one-quarter mile; it is locality 61 of Winkler and others (1981 [OFR 80-892-B]).

Geologic setting

Geologic description

Sparse chalcopyrite and molybdenite are disseminated in Jurassic (?) biotite granodiorite (Winkler and others, 1981 [OFR 80-892-B]; Winkler and others, 1981 [OFR 80-892-A]). The pluton is in metamorphic rocks that include mafic metavolcanic rocks of the Paleozoic Skolai Group.
Geologic map unit (-144.261087802176, 61.4945284669807)
Mineral deposit model Porphyry Cu-Mo (Cox and Singer, 1986; model 21a)
Mineral deposit model number 21a
Age of mineralization Jurassic?; the probable age of the granodiorite host rock (Winkler and others, 1981 [OFR 80-892-A]).

Production and reserves

Workings or exploration Probably only reconnaissance surface examination.
Indication of production None

Additional comments

This occurrence is in Wrangell-St. Elias National Park.

References

MRDS Number A011591

References

Winkler, G.R., Miller, R.J., MacKevett, E.M., Jr., and Holloway, C.D., 1981, Map and summary table describing mineral deposits in the Valdez quadrangle, southern Alaska: U.S. Geological Survey Open-File Report 80-892-B, 2 sheets, scale l:250,000.
Winkler, G.R., Silberman, M.L., Grantz, Arthur, Miller, R.J., and MacKevett, E.M., Jr., 1981, Geologic map and summary geochronology of the Valdez quadrangle, southern Alaska: U.S. Geological Survey Open-File Report 80-892-A, 2 sheets, scale 1:250,000.
Reporters Travis L. Hudson
Last report date 12/14/2001