Unnamed Prospects (ARDF - MC037; upper Roaring Creek), Chistochina Mining District, Valdez-Cordova Census Area, Alaska, USAi

Regional Level Types
Unnamed Prospects (ARDF - MC037; upper Roaring Creek)	- not defined -
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: MacKevett and others (1978) identify several prospects in the upper valley of Roaring Creek. The location of this record is the more central of these prospects. It is at an elevation of about 4,900 feet, 3,700 feet northeast of elevation 7336 (Rock), and 2,400 feet east-northeast of the center of section 19, T. 2 S., R. 9 E. of the Copper River Meridian. This is locality 159 of MacKevett (1976) and locality 15 of MacKevett and others (1978). Cobb and MacKevett (1980) included these prospects under the name 'Roaring Cr.'.
Geology: The deposit at these prospects consist of thin veins that contain small amounts of chalcopyrite, bornite, chalcocite and malachite in Permian sedimentary rocks and Triassic gabbro (Moffit and Mertie, 1923; MacKevett, 1976). They veins were explored by short adits and open cuts. 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: The prospects were explored by short adits and open cuts that are now largely caved.
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
Development Status: None
Deposit Model: Basaltic Cu (Cox and Singer, 1986; model 23)

Other Databases

Link to USGS - Alaska:	MC037

Other Regions, Features and Areas containing this locality

References