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Unnamed (northern Russian Mountains)

Occurrence, Inactive

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Commodities and mineralogy

Main commodities Ag; Cu; Pb; Sb
Other commodities Cd
Ore minerals arsenopyrite; chalcopyrite; galena; malachite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale RM
Quadrangle map, 1:63,360-scale C-1
Latitude 61.699
Longitude -159.196
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is in the northern Russian Mountains, on a ridge crest 1,500 feet northeast of peak 2940. The map site is in the NE1/4 sec. 35, T. 19 N., R. 55 W., of the Seward Meridian. This is sample locality 3 of Bundtzen and Laird (1991).

Geologic setting

Geologic description

Bundtzen and Laird (1991) report two, small, malachite-stained quartz veins containing chalcopyrite, galena, and arsenopyrite. The veins are 1 to 3 centimeters wide and occur along northwest-trending joints in the cupola zone of a syeno-monzonite just below the contact with thermally metamorphosed andesite country rocks. A sample of the veins contained 0.46 percent arsenic, 0.13 percent antimony, 0.94 percent lead, 0.09 percent cadmium, and 45 ppm silver; gold was not detected. The veins are in the Upper Cretaceous intrusive complex of the Russian Mountains (Bundtzen and Laird, 1991).
Geologic map unit (-159.198366339856, 61.6982860273258)
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 (Bundtzen and Laird, 1991).
Indication of production None

References

MRDS Number 10308197

References

Bundzten, T. K., and Laird, G.M., 1991, Geology and mineral resources of the Russian Mission C-1 Quadrangle, southwest Alaska: Alaska Division of Geological and Geophysical Surveys Professional Report 109, 24 p.
Reporters Travis L. Hudson and Madelyn A. Millholland
Last report date 6/10/2001