Unnamed (south of VABM Allen) (ARDF #WI006) Ag, Cu

Unnamed (south of VABM Allen)

Occurrence, Inactive

Commodities and mineralogy

Main commodities	Ag; Cu
Ore minerals	bornite; chalcopyrite; covellite; malachite
Gangue minerals	quartz

Geographic location

Quadrangle map, 1:250,000-scale	WI
Quadrangle map, 1:63,360-scale	C-5
Latitude	67.5392
Longitude	-152.0604
Nearby scientific data	Find additional scientific data near this location
Location and accuracy	This occurrence is at an elevation of about 3,500 feet, about 0.4 mile south-southeast of VABM Allen. The occurrence is the site of sample 84 in Dillon and others (1981 [AOF 133B]). The location is accurate within one-half mile.

Geologic setting

Geologic description This occurrence consists of a quartz vein that contains abundant bornite, lesser amounts of covellite, and traces of chalcopyrite altering to malachite. The vein cuts calcareous schist. A sample of the vein contains more than 2% copper and 100 ppm silver (Dillon and others, 1981, sample 84 [AOF 133B]). Degenhart and others (1978) reported minor amounts of chalcopyrite, bornite, and malachite in metamorphosed, reef limestone a short distance north of this occurrence.
Geologic map unit	(-152.063157229864, 67.538742656646)
Alteration of deposit	Chalcopyrite oxidizing to malachite.

Production and reserves

Workings or exploration	Only surface sampling.
Indication of production	None
Additional comments See also WI005.

References

MRDS Number	A011972
References Degenhart, C.E., Griffis, R.J., McQuat, J.F., and Bigelow, C.G., 1978, Mineral studies of the western Brooks Range performed under contract to the U.S. Bureau of Mines, Contract #JO155089: U.S. Bureau of Mines Open-File Report 103-78, 529 p., 11 sheets. 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