PMRGX-25

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu; Zn
Other commodities As; Ba
Ore minerals pyrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale PM
Quadrangle map, 1:63,360-scale C-3
Latitude 55.586
Longitude -160.877
Nearby scientific data Find additional scientific data near this location
Location and accuracy The map site of this occurrence is at an elevation of 1,800 feet, about 2.0 miles east of Beaver River and 3.1 miles north of Beaver Bay. It is referred to as PMRGX-25 by Wilson and others (1988, locality 73). The location is accurate to within 2,500 feet.

Geologic setting

Geologic description

At this site a dark shale member of the Upper Cretaceous Hoodoo Formation is cut by quartz veinlets and by an andesite sill containing disseminated pyrite (Wilson and others, 1988; 1995). The occurrence is on the periphery of a diorite(?) plug or sill that crops out to the east. Four samples collected by the U.S. Geological Survey in the mid-1980s were reported to be anomalous in arsenic, barium, copper, and zinc (Wilson and others, 1988).
Geologic map unit (-160.879011747373, 55.5851741372722)

Production and reserves

Workings or exploration Rock samples 85AYB719-720 and 85AWS303 and 305, collected by the U.S. Geological Survey in the mid-1980s, were reported to be anomalous in arsenic, barium, copper, and zinc (Wilson and others, 1988).
Indication of production None

Additional comments

This site is on land selected by the Aleut Corporation.

References