Unnamed (near hill 2548 west of Buckstock River)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Au
Other commodities As; Bi; Sb; Zn
Ore minerals goethite after sulfide
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale SM
Quadrangle map, 1:63,360-scale A-8
Latitude 61.2172
Longitude -158.78725
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 2,200 feet along a ridge in the west, central part of the Buckstock Mountains. The occurrences is about 0.3 mile south of peak 2548, about 0.2 mile east of the center of section 16, T. 13 N., R. 53 W., of the Seward Meridian. The location is accurate.

Geologic setting

Geologic description

This occurrence consists of quartz veinlets and iron-stained breccia in coarse-grained hornfels formed from the Upper Cretaceous, Kuskokwim Group (Cady and others, 1955; T.K. Bundtzen and D. Bradley, unpublished field data, 1999). The hornfels strike N46E and dip 42NW. The breccias and quartz veinlets may parallel cleavage which strikes N30E and dips 70SE (T.K. Bundtzen, unpublished field data, 1999). The mineralization is sparse and weak. One grab sample of hornfels with quartz veinlets contained 301 parts per billion (ppb) gold, 34 parts per million (ppm) antimony, and 198 ppm arsenic. Another grab sample collected at the northeast end of the mineralized zone contained 798 ppm arsenic, 33.0 ppm bismuth, and 264 ppm zinc (T.K. Bundtzen and D. Bradley, unpublished analytical data, 1999).
Geologic map unit (-158.789588655091, 61.2164880400946)
Mineral deposit model Polymetallic vein? (Cox and Singer, 1986; model 22c).
Mineral deposit model number 22c?
Alteration of deposit Hornfelsing of clastic rocks.

Production and reserves

Workings or exploration The U.S. Geological Survey sampled the occurrence in 1999.
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