Ginny Creek Prospect, Noatak Mining District, Northwest Arctic Borough, Alaska, USAi

Regional Level Types
Ginny Creek Prospect	Prospect
Noatak Mining District	Mining District
Northwest Arctic Borough	Borough
Alaska	State
USA	Country

See MAS/MILS Sequence # 0020190007 (USBM, 1995)
Location: Location plotted is prospect locality of Mayfield and others (1979, pl. 1); on ridge between Kugururok River and Trail Creek, about 7 mi (11.2 km) northwest of Misheguk Mountain; located to within 1 mi (1.6 km).
Geology: Sphalerite, galena, pyrite, and rare chalcopyrite occur mainly as minute crystals scattered throughout mineralized sandstone, which also contains considerable siderite where mineralized and none elsewhere. Thin quartz veins cut the sedimentary beds; most are barren, but sulfides occur sparsely in some of them. Rock and stream sediment samples indicate that the deposit may also contain silver, but the mineral(s) in which silver occurs has not been determined. Mineralized area is at least 1 mile long and up to 1/2 mile wide. Deposit apparently formed by hydrothermal open-space filling and replacement rather than by hot-spring deposition on sea floor; deposit is in lowest (Brooks Range) thrust sequence in area. Surface rubble is a discontinuous mixture of gossan and partly iron-stained sandstone. Sulfides are preserved only in the least weathered surface rocks. Surface leaching produces a pitted appearance on many of the limonite-rich rocks. Deposit is in region of extreme thrust faulting.
Workings: Analyzed samples contain 0.3-1% Zn and variable Pb concentrations (Mayfield and others, 1979, p. 9-17)
Alteration: Iron-staining, leaching

Commodities (Major) - Pb, Zn; (Minor) - Ag?, Cu
Development Status: No
Deposit Model: Sediment-hosted Pb-Zn.

Other Databases

Link to USGS - Alaska:	MU007

Other Regions, Features and Areas containing this locality

References