Nabob Prospect, Chisana Mining District, Valdez-Cordova Census Area, Alaska, USAi

Regional Level Types
Nabob Prospect	Prospect
Chisana Mining District	Mining District
Valdez-Cordova Census Area	Census Area
Alaska	State
USA	Country

The prospect is in the Wrangell-St. Elias National Preserve.
Location: This prospect is about 2,500 feet downstream of the terminus of the glacier at the head of William Creek. This is close to the east boundary of the Nabesna A-4 quadrangle in the SE1/4 of section 19, T. 5 N., R. 16 E. of the Copper River Meridian. This is National Park Service locality WRST-41 (unpublished data) and the coordinates of this prospect were provided by the National Park Service.
Geology: An unpublished National Park Service map and accompanying database identify this as a copper-gold prospect, where 8 lode claims were active from 1972 to 1976. It is near the contact between granitic rocks of the mid-Cretaceous, Nabesna pluton and Triassic, Nikolai Greenstone (Richter, 1973). A sample of garnet skarn collected about 1 mile south of the site and just inside the boundary of the Nabesna A-3 quadrangle contained 1.2 parts per million (ppm) gold, 10 ppm silver, more than 20,000 ppm copper, and 1,500 ppm nickel (Richter and Matson, 1969).
Workings: At least surface prospecting has occurred here.
Age: Mid-Cretaceous? If this deposit is related to emplacement of the Nabesna pluton, it is mid-Cretaceous in age; K/Ar dates for this pluton range from 105 +/- 4.0 to 114 +/- 3.4 Ma (Richter, Lanphere, and Matson, 1975).

Commodities (Major) - Au, Cu
Development Status: None

Other Databases

Link to USGS - Alaska:	NB067

Other Regions, Features and Areas containing this locality

References