Unnamed (southwestern Buckstock Mountains)

Occurrence, Inactive

Commodities and mineralogy

Main commodities As
Other commodities Au
Ore minerals arsenopyrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale SM
Quadrangle map, 1:63,360-scale A-8
Latitude 61.09355
Longitude -158.81475
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is on a northeast-trending, broad ridge near the head of a northeast fork of Timber Creek, in the southwest corner of the Buckstock Mountains. The occurrence is about 0.3 mile southeast of Hill 2331. It is at an elevation of about 2,200 feet in the NW1/4 sec. 35, T. 12 N., R. 54 W., of the Seward Meridian. The location is accurate.

Geologic setting

Geologic description

This occurrence is a large quartz vein with minor disseminated sulfides that intrudes tuffaceous sediments of the Mesozoic Gemuk group (Cady and others, 1955; T.K. Bundtzen unpublished field data, 1993). Based on rubble crop, the quartz vein strikes N20W and can be traced for about 1,600 feet. The vein is from about 1 foot to 10 feet wide. One arsenopyrite-bearing sample of the quartz vein contained 4,500 parts per million arsenic and 200 parts per billion gold (T.K. Bundtzen, unpublished analytical data, 1993).
Geologic map unit (-158.817066188315, 61.0928350704489)
Mineral deposit model Polymetallic vein? (Cox and Singer, 1986; model 22c).
Mineral deposit model number 22c?

Production and reserves

Workings or exploration This occurrence was found in 1993 during a cooperative study by the Alaska Division of Geological and Geophysical Surveys and the U.S. Geological Survey in the Buckstock Mountains.
Indication of production None

References

References

Reporters T.K. Bundtzen (Pacific Rim Geological Consulting, Inc.) and M.L. Miller (U.S. Geological Survey)
Last report date 5/9/2003