Unnamed (south of Mathews Dome) (ARDF #WI085) Ag, Au, Zn

Unnamed (south of Mathews Dome)

Occurrence, Inactive

Commodities and mineralogy

Main commodities	Ag; Au; Zn
Other commodities	Pb
Ore minerals	pyrite; sphalerite

Geographic location

Quadrangle map, 1:250,000-scale	WI
Quadrangle map, 1:63,360-scale	B-3
Latitude	67.4437
Longitude	-151.4779
Nearby scientific data	Find additional scientific data near this location
Location and accuracy	This occurrence is located about 1.5 miles south of Mathews Dome. It is at near a prominent peak an elevation of about 4,000 feet in the NW1/4 section 12, T. 30 N., R. 18 W., of the Fairbanks Meridian. The location is accurate.

Geologic setting

Geologic description This occurrence consists of replacement layers or veins of sphalerite and pyrite up to 8 cm thick in an orange-weathering dolomite layer in gray marble (Dillon and others, 1981 [AOF 133B]. A grab sample of the mineralized rock contains 0.40 ppm gold, 2.2 ppm silver, 200 ppm lead, and 10.3% zinc. High values of Mg and Mn were also noted.
Geologic map unit	(-151.480646009586, 67.4432480695913)
Mineral deposit model	Polymetallic replacement deposit? (Cox and Singer, 1986; model 19a?).
Mineral deposit model number	19a?

Production and reserves

Workings or exploration	Only surface sampling.
Indication of production	None

References

MRDS Number	A011995
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