Unnamed (west of Rice Gulch Creek)

Occurrence, Undetermined

Commodities and mineralogy

Main commodities Asbestos; Cu
Ore minerals asbestos; chalcopyrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale BR
Quadrangle map, 1:63,360-scale C-1
Latitude 66.5172
Longitude -141.3142
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 2,250 feet, approximately 2.7 miles west-northwest of VABM Circle and 4.2 miles west of the junction of Rice Gulch Creek and the Salmon Fork of Black River. It is in T. 19 N., R. 30 E., of the Fairbanks Meridian. The location is accurate to within 500 feet.

Geologic setting

Geologic description

The general area of this occurrence is underlain mainly by undivided Lower Cambrian and Proterozoic rocks of the Tindir Group, which consists predominantly of carbonate, quartzite, argillite, and subordinate volcanic rocks (Dover, 1994). Geologic mapping by Doyon Limited (1987) delineated a small ultramafic body at the western end of a ridge of quartzite and phyllite. The ultramafic body contains minor chalcopyrite and asbestos. The asbestos occurs in 2-inch- to 5-inch-wide veins. Limited outcrop of the ultramafic body did not allow an accurate determination of the density and extent of the asbestos veins. Quartz veins in the ultramafic body contain chalcopyrite (Doyon Limited, 1987).
Geologic map unit (-141.316789166421, 66.5169449302808)
Mineral deposit model Asbestos and chalcopyrite associated with a small ultramafic body.

Production and reserves

Indication of production None

References

References

Reporters K.H. Clautice (Alaska Division of Geological and Geophysical Surveys)
Last report date 3/15/2002