Unnamed (west of Twoday Mountain) (ARDF #WI072) Zn

Unnamed (west of Twoday Mountain)

Occurrence, Inactive

Commodities and mineralogy

Main commodities	Zn
Ore minerals	pyrite; sphalerite

Geographic location

Quadrangle map, 1:250,000-scale	WI
Quadrangle map, 1:63,360-scale	B-4
Latitude	67.2698
Longitude	-151.74
Nearby scientific data	Find additional scientific data near this location
Location and accuracy	This occurrence is between upper Timber and Suckik Creeks, about 5 miles south-southwest of Twoday Mountain. The occurrence is locality 88 of Dillon and others (1981 [AOF 133B]). It is at an elevation of about 3,950 feet, about 0.6 mile south-southeast of the center of section 4, T. 28 N., R. 19 W., of the Fairbanks Meridian. The location is accurate.

Geologic setting

Geologic description This occurrence consists of banded marble that locally contains layers with 10% sphalerite that replaces pyrite(?) (Dillon, 1981 [AOF 133B]). However, a grab sample from outcrop, contains only 25 ppm Zn and no other anomalous metal values. The rocks in the area are Devonian(?) or older(?), black slate, phyllite, and limestone (Bliss and others, 1988). No other information is available.
Geologic map unit	(-151.742732740498, 67.2693394102469)

Geologic description

This occurrence consists of banded marble that locally contains layers with 10% sphalerite that replaces pyrite(?) (Dillon, 1981 [AOF 133B]). However, a grab sample from outcrop, contains only 25 ppm Zn and no other anomalous metal values. The rocks in the area are Devonian(?) or older(?), black slate, phyllite, and limestone (Bliss and others, 1988). No other information is available.

Geologic map unit

(-151.742732740498, 67.2693394102469)

Production and reserves

Workings or exploration	Only surface sampling.
Indication of production	None

References

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