Unnamed Occurrence (ARDF - HE149; north of upper Schist Creek), Bonnifield District, Denali Borough, Alaska, USA
Location: This occurrence is at an elevation of about 4,500 feet, on a north-south ridge north of, and perpendicular to, upper Schist Creek. The map site is in the NW1/4 of sec. 1, T. 17 S., R. 6 W., of the Fairbanks Meridian. The location is accurate to within 1500 feet. This is location 9 of Clark and Cobb (1972).
Geology: The country rocks in the area of this occurrence are the Paleocene Cantwell Formation which consists of terrigenous sedimentary rocks, including a few thin coal beds, and Eocene-Oligocene granitic plutons that intrude the Cantwell (Wilson and others, 1998). The occurrence consists of unspecified copper, molybdenum and silver minerals in the granitic rocks (Clark and Cobb, 1972).
Workings: There has been surface exploration only.
Age: Probably Eocene-Oligocene.
Commodities (Major) - Ag, Cu, Mo
Development Status: None
Deposit Model: Porphyry Cu-Mo(?) (Cox and Singer, 1986; 21a)
ReferencesClark, A.L., and Cobb, E.H., 1972, Metallic mineral resources map of the Healy quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-394, 1 sheet, scale 1:250,000. Wilson, F.H., Dover, J.H., Bradley, D.C., Weber, F.R., Bundtzen, T.K., and Haeussler, P.J., 1998, Geologic map of central (interior) Alaska: U.S. Geological Survey Open-File Report 98-133, 76 p., 3 sheets, scale 1:500,000.
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Locality Updated: Myall Lakes Reserve, Bolton, Victoria, AustraliaFrom Pat Sutton, 23rd May 2013 01:30:19