Unnamed (ridge at head of Brown Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag; As; Cu; Pb; Zn
Other commodities Au; Sb
Ore minerals unspecified sulfides
Gangue minerals quartz; tourmaline

Geographic location

Quadrangle map, 1:250,000-scale ID
Quadrangle map, 1:63,360-scale D-2
Latitude 62.90313
Longitude -156.88863
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is on top of a prominent east-west trending ridge north of the headwaters of Beaver Creek. It is at an elevation of about 3,300 feet, about 0.6 mile west-southwest of the center of section 33, T. 33 N., R. 40 W., of the Seward Meridian.

Geologic setting

Geologic description

This occurrence is in a roof pendant of volcanic rocks near the eastern contact of the 70.9 Ma, Beaver Mountains stock (Bundtzen and Laird, 1982; Miller and Bundtzen, 1994). The occurrence consists of tourmaline-quartz-sulfide veinlets in hornfelsed andesite. One grab sample of mineralization collected by Battle Mountain Mining Company contained 91 parts per billion (ppb) gold, 129.9 parts per million (ppm) silver, 4,879 ppm copper, 1.71 percent lead, 1.78 percent zinc, more than 2,000 ppm arsenic, and 103 ppm antimony (Szumigala, 1993).
Geologic map unit (-156.890987818348, 62.9024791763472)
Mineral deposit model Polymetallic vein (Cox and Singer, 1986; model 22c).
Mineral deposit model number 22c
Age of mineralization Undated; probably related to the emplacement of the Beaver Mountains stock that has an age of 70.3 Ma (Bundtzen and Laird, 1982).

Production and reserves

Workings or exploration Surface sampling was conducted by Battle Mountain Mining Company in 1990 (Szumigala, 1993).
Indication of production None



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 5/17/2003