Unnamed (southern Russian Mountains)

Occurrence, Probably inactive

Commodities and mineralogy

Main commodities Sb
Other commodities Nd; Ta; U
Gangue minerals limonite; quartz

Geographic location

Quadrangle map, 1:250,000-scale RM
Quadrangle map, 1:63,360-scale C-1
Latitude 61.636
Longitude -159.101
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is in the Russian Mountains about 0.7 mile southeast of peak 2815. The map site is on a ridge crest, at an elevation of about 2,500 feet, about 0.25 mile east of the center of sec. 20, T. 18 N., R. 54 W., of the Seward Meridian. It is sample localities 16 and 17 of Bundtzen and Laird (1991).

Geologic setting

Geologic description

This occurrence consists of two gossan-rich quartz veins, as much as 1.5 feet wide, along northwest-trending joints and fractures in quartz syenite (Bundtzen and Laird, 1991). Sulfide minerals were not identified in these strongly oxidized veins. Samples contained up to 0.3 percent arsenic, 1.5 percent antimony, 353 ppm neodymium, 54 ppm tantalum, and 52 ppm uranium. The host quartz syenite is part of the Late Cretaceous intrusive complex of the Russian Mountains (Bundtzen and Laird, 1991).
Geologic map unit (-159.103363768657, 61.635285145855)
Mineral deposit model Polymetallic veins? (Cox and Singer, 1986; model 22c)
Mineral deposit model number 22c?
Age of mineralization Late Cretaceous or Tertiary. Veins crosscut part of the intrusive complex of the Russian Mountains. Quartz monzonite from this complex has yielded a K/Ar age of 70.3 +/- 2.1 Ma (Bundtzen and Laird, 1991).
Alteration of deposit Quartz veining.

Production and reserves

Workings or exploration Surface observation and sampling has been completed.
Indication of production None

References