Jerry Creek Prospect (BT claim group), Shungnak Mining District, Northwest Arctic Borough, Alaska, USAi

Regional Level Types
Jerry Creek Prospect (BT claim group)	Prospect
Shungnak Mining District	Mining District
Northwest Arctic Borough	Borough
Alaska	State
USA	Country

Location: The Jerry Creek (BT) prospect is at an elevation of about 3100 feet on a ridge northwest of Avaraart Lake. It is in the N1/2 of sec. 23, T. 20 N., R. 13 E., of the Kateel River Meridian. The location is accurate to within 1000 ft. The site corresponds to locality 58 of Grybeck and Nelson (1981).
Geology: The Jerry Creek (BT) deposit consists of stratiform, fine-grained, weakly disseminated pyrite, sphalerite, and chalcopyrite that occur over a strike distance of at least 3600 ft. The BT claim group covers three fault-bounded blocks of pelitic, volcanic, and carbonate strata which have under gone two major folding events accompanied by synkinematic metamorphism. The northern fault block consists of pelitic schist that grades upward to calcareous schist and marble; it contains a of 30-60-foot-thick horizon of intercalated feldspathic, calcareous, and graphitic pelitic schist, along with compositionally banded layers of quartz, actinolite, epidote, garnet, calcite, apatite, and actinolite. The sulfides are disseminated in the feldspathic schists and in the compositionally banded rock (Hitzman, 1978). Selected samples contain up to 0.72 percent Cu, 2.15 percent Zn, and 0.40 oz Ag/ton. BT is one of several volcanogenic deposits in the Ambler schist belt along the south flank of the Brooks Range. These deposits may be part of a rifted continental margin (Schmidt, 1981).
Workings: Some unpublished detailed mapping and surface sampling by industry.
Age: Host rock is Devonian-Mississippian in age.

Commodities (Major) - Ag, Cu, Pb, Zn
Development Status: None
Deposit Model: Kuroko massive sulfide (Cox and Singer, 1986; model 28a)

Other Databases

Link to USGS - Alaska:	SP031

Other Regions, Features and Areas containing this locality

References