Tana Prospect, Koyukuk Mining District, Yukon-Koyukuk Census Area, Alaska, USAi

Regional Level Types
Tana Prospect	Prospect
Koyukuk Mining District	Mining District
Yukon-Koyukuk Census Area	Census Area
Alaska	State
USA	Country

See also: Frog (WI044).
Location: This prospect is at an elevation of about 1,000 meters, just above the center of the southern boundary of section 17, T. 29 N., R. 23 W., of the Fairbanks Meridian. The location is accurate.
Geology: This prospect consists of oxidized, sulfide-bearing blocks of talus (Kurtak and others, 2002). The talus is distributed along two northwest-trending linear zones that are roughly parallel to the strike of underlying Devonian, Skajit Limestone. The sulfides occur in the matrix of dolomite breccia, and consist predominately of sphalerite with smaller amounts of galena and pyrite, and traces of chalcopyrite. A composite sample of the talus contains 4.4% lead, 6.7% zinc, and 4.03 ounces of silver per ton. (Kurtak and others, 2002).
Workings: Kurtak and others (2002) report that mining claims were located in 1977 and surface mapping, trenching, and soil sampling were done in 1978.
Alteration: The sulfides are oxidized to limonitic gossan.

Commodities (Major) - Ag, Pb, Zn; (Minor) - Cu
Development Status: None
Deposit Model: Polymetallic replacement deposit (?) (Cox and Singer, 1986; model 19a)

Other Databases

Link to USGS - Alaska:	WI050

Other Regions, Features and Areas containing this locality

References