Russian Bay

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag; Au
Other commodities As; Hg; Mo
Ore minerals gold; pyrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale UK
Quadrangle map, 1:63,360-scale A-2
Latitude 53.16
Longitude -168.44
Nearby scientific data Find additional scientific data near this location
Location and accuracy This site is at an elevation of about 800 feet, approximately 2 1/2 miles due west of the head of Russian Bay. Site location is accurate to within 1 mile.

Geologic setting

Geologic description

This site was called the Russian Bay prospect by Randolph and Ellis (1989). It is a geothermal area of hot-springs and one active fumarole and is marked by an 8,000 x 10,000 foot color anomaly.
Many centers of extreme acid leaching are present and consist of blue-gray pyritic clay and minor silica. An intensely silicified fault breccia occurs at one locality on the east edge of the color anomaly.
Fifty-three rock samples collected by Battle Mountain Exploration contained up to 745 ppm arsenic, 104 ppb gold, > 5 ppm mercury, 23 ppm molybdenum, and 3.8 ppm silver (Randolph and Ellis, 1989).
Geologic map unit (-168.442002784106, 53.1590590932006)
Mineral deposit model Hot-spring Au-Ag (Cox and Singer, 1986, model 25a)
Mineral deposit model number 25a
Age of mineralization Tertiary or younger.
Alteration of deposit This site exhibits argillic alteration and minor silicification.

Production and reserves

Workings or exploration Fifty-three rock samples collected by Battle Mountain Exploration contained up to 745 ppm arsenic, 104 ppb gold, >5 ppm mercury, 23 ppm molybdenum, and 3.8 ppm silver (Randolph and Ellis, 1989, p. 11).
Indication of production None

Additional comments

This site is on land selected by the Aleut Native Corporation.

References

MRDS Number 10308472

References

Randolph, D.B., and Ellis, W.T., 1989, Unalaska project, 1989 final report: Battle Mountain Exploration Company, Alaska District, 41 p., 5 appendices, 11 plates, various scales. (Report held by the Aleut Corporation, Anchorage, Alaska.)
Reporters S.H. Pilcher (Anchorage)
Last report date 1/27/2000