Little Bird Prospect, Yukon-Koyukuk Census Area, Alaska, USAi

Regional Level Types
Little Bird Prospect	Prospect
Yukon-Koyukuk Census Area	Census Area
Alaska	State
USA	Country

Location: The Little Bird prospect is on an east-facing slope on the west side of Sheep Creek Valley at an elevation of about 3,600 feet (1,097 m) in the SE1/4 sec. 6, T. 26 N., R. 24 W., of the Seward Meridian. The Little Bird prospect is 3.5 kilometers (2.2 miles) north of the Dahl prospect. The Little Bird prospect was briefly examined by the reporter in 1982.
Geology: The Little Bird occurrence consists of sulfide-bearing, pyroxene skarn in limestone of the Lower Devonian Barren Ridge Limestone, a unit of the Dillinger subterrane (Bundtzen, Harris, and Gilbert, 1997). The skarns occur near a weakly mineralized granite porphyry stock (Brewer and others, 1992). Discontinuous semi-massive sulfide to disseminated pyrrhotite, chalcopyrite, sphalerite, and galena occur in a 200 meter by 700 meter skarn zone. Grades and widths are quite variable, but up to 4.5 percent copper, 1.7 percent lead, 11.4 percent zinc, 426.1 grams/tonne silver, and 0.33 percent tungsten are found in the sulfide-bearing skarn zone (Brewer and others, 1992). The deposit was explored by Anaconda Minerals Company from 1981-1983. No analytical data is available.
Workings: The Little Bird occurrence was explored by Anaconda Minerals Company from 1981-1983 (Rob Kell, written communication, 1984). Grades and widths are quite variable, but up to 4.5 percent copper, 1.7 percent lead, 11.4 percent zinc, 426.1 grams/tonne silver, and 0.33 percent tungsten occur in the sulfide bearing skarns (Brewer and others, 1992).
Reserves: None.

Commodities (Major) - Ag, Cu, Zn; (Minor) - Pb, W
Development Status: No
Deposit Model: Polymetallic lead-zinc skarn (Cox and Singer, 1986; model 18c).

Other Databases

Link to USGS - Alaska:	MG047

Other Regions, Features and Areas containing this locality

References