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Unnamed (east of the north end of Wild Lake)

Occurrence, Inactive

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Commodities and mineralogy

Main commodities Cu
Other commodities Ag; Au
Ore minerals bornite; chalcopyrite; malachite
Gangue minerals ankerite; calcite; quartz

Geographic location

Quadrangle map, 1:250,000-scale WI
Quadrangle map, 1:63,360-scale C-3
Latitude 67.5364
Longitude -151.4849
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is located on a ridge about 1 mile east of Wild Lake, between the head of Surprise Creek and the north end of Wild Lake. The occurrence is at an elevation of about 3,000 feet in the NE1/4 SE1/4 section 2, T. 31 N., R. 18 W., of the Fairbanks Meridian. Several sample locations (Chipp, 1972, samples 116 and 117; Kurtak and others, 1999, samples 46, 47, and 48) were collected for about 4,000 feet northeast from this occurrence. The location is accurate.

Geologic setting

Geologic description

This occurrence consists of quartz-calcite-ankerite(?) veins with varying amounts of bornite, malachite, or chalcopyrite (Chipp, 1972, sample 116 and 117; Kurtak and others, 1999, sample 46). One of Chipp's samples contains 2,700 ppm copper, 0.14 ppm gold, and 3.1 ppm silver. Sample of quartz veins collected by Kurtak and others (1999, samples 46, 47, and 48 contain copper minerals but analysis of these samples showed no significant metal values. The rocks in the area are Devonian schist and phyllite (Dillon and others, 1986). No other information is available.
Geologic map unit (-151.487656155509, 67.5359508772443)
Mineral deposit model Polymetallic vein? (Cox and Singer, 1986; model 22c?).
Mineral deposit model number 22c?

Production and reserves

Workings or exploration Only surface sampling.
Indication of production None

References

MRDS Number A011934

References

Chipp, E.R., 1972, Analyses of rock and stream sediment samples, Wild Lake area, Wiseman quadrangle, Arctic Alaska: Alaska Division Geological Survey Geochemical Report 25, 2 sheets.
Kurtak, J.M., Klieforth, R.F., Clark, J.M., and Williams, E.M., 1999, Mineral investigations in the Koyukuk mining district, northern Alaska--Progress Report: U.S. Bureau of Land Management Open-File Report 74, 158 p.
Reporters J.M. Britton (Anchorage)
Last report date 8/9/2002