Unnamed (near hill 3670 in north-central Beaver Mountains)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag; Cu
Other commodities As; Au; Pb; Zn
Ore minerals chalcopyrite
Gangue minerals quartz; tourmaline

Geographic location

Quadrangle map, 1:250,000-scale ID
Quadrangle map, 1:63,360-scale D-2
Latitude 62.91472
Longitude -156.92388
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is on a steep north-facing slope about 500 feet east of hill 3670 in the north-central Beaver Mountains, The occurrence is at an elevation of about 3,000 feet in the SE1/4 SE1/4 section 30, T. 33 N., R. 40 W., of the Seward Meridian. The location is approximate.

Geologic setting

Geologic description

This occurrence consists of a 10-foot-zone of vein-type mineralization in a cupola of the Upper Cretaceous, Beaver Mountains stock (Szumigala, 1993; Bundtzen and Laird, 1982). The zone contains veinlets of tourmaline, quartz, and minor chalcopyrite. No size or orientation information is available. One chip sample contained 43 parts per billion (ppb) gold, 60.0 parts per million (ppm) silver, 1.03 percent copper, 108 ppm lead, 247 ppm zinc, and 94.5 ppm arsenic (Szumigala, 1993).
Geologic map unit (-156.926237789341, 62.9140680253698)
Mineral deposit model Polymetallic vein (Cox and Singer, 1986; model 22c).
Mineral deposit model number 22c
Age of mineralization May be related to the Beaver Mountains pluton which has been dated at 70.1 Ma. (Bundtzen and Laird, 1982).
Alteration of deposit None noted.

Production and reserves

Workings or exploration Surface sampling was conducted by Battle Mountain Mining Company in 1990. Samples were collected and analyzed by the Alaska Division of Geological and Geophysical Surveys in 1992 (Szumigala, 1993).
Indication of production None

References

MRDS Number A015084

References

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 5/12/2003