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

Regional Level Types
Mayflower 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 wall of a small cirque valley south of Kuskulana Glacier (Winkler and MacKevett, 1981). It is at an elevation of about 4,600 feet, 4,500 feet west of elevation 6310, and 2,500 feet from Kuskulana Glacier. The site is in the northwest corner of section 9, T. 3 S., R. 10 E. of the Copper River Meridian. This is locality 127 of MacKevett (1976), and Cobb and MacKevett (1980) included it under the name 'Mayflower'.
Geology: The deposit at this prospect consists of bornite, chalcocite, and secondary copper minerals (assumed to be mostly malachite) that are associated with quartz and epidote in narrow veins up to 12 inches thick (Moffit and Mertie, 1923; MacKevett, 1976). The veins are localized along faults cutting Triassic Nikolai Greenstone. The deposits 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 deposits were explored by short adits and open cuts.
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:	MC069

Other Regions, Features and Areas containing this locality

References