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Unnamed (northeast of Ernie Lake)

Occurrence, Inactive

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Commodities and mineralogy

Main commodities Zn
Other commodities Fe
Ore minerals magnetite; pyrite; sphalerite

Geographic location

Quadrangle map, 1:250,000-scale WI
Quadrangle map, 1:63,360-scale B-6
Latitude 67.4121
Longitude -152.8739
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is about 3 miles northeast of Ernie Lake. It is at an elevation of about 1,240 meters, about 0.4 mile east-northeast of the center of section 22, T. 30 N., R. 24 W., of the Fairbanks Meridian. The occurrence is the site of sample 57 of Dillon and others (1981 [AOF 133B]). The location is accurate.

Geologic setting

Geologic description

This occurrence consists of magnetite, sphalerite, and pyrite in dark green tactite at the contact of a granite pluton (Dillon and others, 1981 [AOF 133B]). A grab sample from an outcrop of the tactite contains 500 ppm zinc and more than 20% iron. The rocks in the area are mainly Proterozoic(?) granitic rocks, but there is none at this occurrence.
Geologic map unit (-152.876666818891, 67.411630614185)
Mineral deposit model Fe skarn? (Cox and Singer, 1986; model 18d?).
Mineral deposit model number 18d?

Production and reserves

Workings or exploration Only surface sampling.
Indication of production None

References

MRDS Number A011967

References

Dillon, J.T., Cathrall, J.B., and Moorman, M.A., 1981, Geochemical reconnaissance of the southwest Wiseman quadrangle-summary of data on rock samples: Alaska Division of Geological and Geophysical Surveys Open-File Report 133B, 164 p.
Reporters J.M. Britton (Anchorage)
Last report date 8/9/2002