Unnamed (north bank of Beaver Creek) (ARDF #ID094) Hg, W

Unnamed (north bank of Beaver Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities	Hg; W
Other commodities	As; Cr; Pb; Zn
Ore minerals	unspecified sulfides
Gangue minerals	quartz

Geographic location

Quadrangle map, 1:250,000-scale	ID
Quadrangle map, 1:63,360-scale	C-1
Latitude	62.66824
Longitude	-156.18358
Nearby scientific data	Find additional scientific data near this location
Location and accuracy	This occurrence is at an elevation of about 800 feet on a steep bluff about 0.5 mile north of Beaver Creek. It is about 1.0 mile southwest of hill 1170, about 0.8 mile east-southeast of hill 985, and bout 0.2 mile west of the northeast corner of section 27, T. 30 N., R. 37 W., of the Seward Meridian. The location is accurate.

Geologic setting

Geologic description This occurrence consists of quartz stringers in an altered felsic(?) dike that cuts shale and sandstone of the Upper Cretaceous, Kuskokwim Group (Miller and Bundtzen, 1994; Miller, Bundtzen, and Gray, 2005). Grab samples contain up to 1.00 percent arsenic, more than 10.0 parts per million (ppm) mercury, 200 ppm tungsten, 100 ppm lead, 1,000 ppm chromium, and 120 ppm zinc (McGimsey and others, 1988).
Geologic map unit	(-156.185943943681, 62.6675989942016)
Mineral deposit model	Polymetallic vein? (Cox and Singer, 1986; model 22c).
Mineral deposit model number	22c?
Age of mineralization	Unknown; the dike is undated.
Alteration of deposit	Silicification.

Production and reserves

Workings or exploration	The site was sampled by the U.S. Geological Survey in 1984 (McGimsey and others, 1988).
Indication of production	None

References

References McGimsey, R.G., Miller, M.L., and Arbogast, B.F., 1988, Paper version of analytical results, and sample locality map for rock samples from the Iditarod quadrangle, Alaska: U.S. Geological Survey Open-File Report 88-421-A, 110 p., 1 sheet, scale 1:250,000. Miller, M.L., and Bundtzen, T.K., 1994, Generalized geologic map of the Iditarod quadrangle, Alaska showing potassium-argon, major oxide, trace element, fossil, paleocurrent, and archeological sample localities: U.S. Geological Survey Miscellaneous Field Studies Map MF-2219-A, 48 pages; 1 sheet, scale 1:250,000. Miller, M.L., Bundtzen, T.K., and Gray, J.E., 2005, Mineral resource assessment of the Iditarod quadrangle, west-central Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-2219-B, scale 1:250,000, pamphlet.
Reporters	T.K. Bundtzen (Pacific Rim Geological Consulting, Inc.), M.L. Miller (U.S. Geological Survey); and C.C. Hawley (Hawley Resource Group)
Last report date	5/18/2003