Unnamed Occurrence (ARDF - RM013; northern Russian Mountains), Aniak Mining District, Bethel Census Area, Alaska, USAi

Regional Level Types
Unnamed Occurrence (ARDF - RM013; northern Russian Mountains)	- not defined -
Aniak Mining District	Mining District
Bethel Census Area	Census Area
Alaska	State
USA	Country

Location: 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).
Geology: 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).
Workings: Surface observation and sampling has been completed (Bundtzen and Laird, 1991).
Age: 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: Quartz veining.

Commodities (Major) - Ag, Cu, Pb, Sb; (Minor) - Cd
Development Status: None
Deposit Model: Polymetallic veins (Cox and Singer, 1986; model 22c)

Other Databases

Link to USGS - Alaska:	RM013

Other Regions, Features and Areas containing this locality

References