St. James Bay

Prospect, Inactive

Commodities and mineralogy

Main commodities Ag; Pb; Zn
Ore minerals galena
Gangue minerals calcite; quartz

Geographic location

Quadrangle map, 1:250,000-scale JU
Quadrangle map, 1:63,360-scale C-4
Latitude 58.5955
Longitude -135.2226
Nearby scientific data Find additional scientific data near this location
Location and accuracy This prospect is at an elevation of about 100 feet, about midway along St. James Bay. It is at the northwest corner of section 8, T. 38 S., R. 62 E. of the Copper River Meridian. The location is accurate within 1/4 mile.

Geologic setting

Geologic description

The St. James Bay prospect consists of three parallel, quartz-calcite veins in black phyllite. The veins strike about west-northwest, dip 76 NE, and can be traced along strike up to 3000 feet. The westernmost vein is up to 15 feet thick and contains galena. The veins were developed in the 1890s by 2 adits driven in 1896. U.S. Bureau of Mines samples contained up to 4.8 ppm silver, 15,100 ppm zinc, and 5,280 ppm lead (Clough and Redman, 1989). The general area is underlain by metamorphosed Silurian and Devonian clastic rocks, limestone, and volcanic units; Permian limestone and siltstone; and small plutons of Tertiary and Cretaceous granodiorite (Brew and Ford, 1985).
Geologic map unit (-135.224408107889, 58.5951693938624)

Production and reserves

Workings or exploration The veins were developed in the 1890s by 2 adits driven in 1896.
Indication of production None

References