Warner Prospect, Chistochina Mining District, Valdez-Cordova Census Area, Alaska, USAi

Regional Level Types
Warner Prospect	Prospect
Chistochina Mining District	Mining District
Valdez-Cordova Census Area	Census Area
Alaska	State
USA	Country

The locality is in the Wrangell-Saint Elias National Park and Preserve.
Location: This prospect is on the west bank of lower Rock Creek. It is at an elevation of about 2,500 feet, 5,800 feet northwest of elevation 5282, and 1,500 feet east-southeast of the center of section 9, T. 2 S., R. 8 E. of the Copper River Meridian. This is locality 169 of MacKevett (1976) and locality 8 of MacKevett and others (1978). The location is accurate to within about 100 feet. Cobb and MacKevett (1980) included this prospect under the name 'Warner'.
Geology: The deposit at this prospect consists of a brecciated quartz-calcite vein up to 1 meter thick that contains minor amounts of bornite, chalcopyrite. and malachite (Moffit and Mertie, 1923; MacKevett, 1976). The vein is in Triassic Nikolai Greenstone. A sample of the mineralization contained 5 parts per million (ppm) silver and 20,000 ppm copper (MacKevett, 1976). A 25-foot-long adit explored this deposit. The widespread deposition of copper in Triassic greenstone and limestone of the area is thought to have accompanied regional deformation and low-grade metamorphism in the Late Jurassic or Early Cretaceous (MacKevett and others, 1997). Copper-bearing minerals were deposited in the underlying Nikolai Greenstone at about 112 Ma (Silberman and others, 1980).
Workings: A 25-foot-long adit explored this deposit.
Age: Cretaceous? The widespread deposition of copper in Triassic greenstone and limestone of the area is thought to have accompanied regional deformation and low-grade metamorphism in the Late Jurassic or Early Cretaceous (MacKevett and others, 1997). Copper-bearing minerals were deposited in the underlying Nikolai Greenstone at about 112 Ma (Silberman and others, 1980).
Alteration: Oxidation.

Commodities (Major) - Cu; (Minor) - Ag
Development Status: None
Deposit Model: Basaltic Cu (Cox and Singer, 1986; model 23)

Other Databases

Link to USGS - Alaska:	MC028

Other Regions, Features and Areas containing this locality

References