Unnamed Occurrence (ARDF - SM065; southwestern Buckstock Mountains), Aniak District, Bethel Borough, Alaska, USA

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Location: 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.
Geology: 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sulfides that intrudes tuffaceous sediments of the Mesozoic Gemuk group (Cady and others, 1955; T.K. Bundtzen unpublished field data, 1993).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sample of the quartz vein contained 4,500 parts per million arsenic and 200 parts per billion gold (T.K. Bundtzen, unpublished analytical data, 1993).
Workings: 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.

Commodities (Major) - As; (Minor) - Au
Development Status: None
Deposit Model: Polymetallic vein? (Cox and Singer, 1986; model 22c).

References

Cady, W.M., Wallace, R.E., Hoare, J.M., and Webber, E.J., 1955, The central Kuskokwim region, Alaska: U.S. Geological Survey Professional Paper 268, 132 p.

Mineral List

Arsenopyrite

Quartz

2 entries listed. 2 valid minerals.