PMRGX-10

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag; Pb; Zn
Other commodities As; Sb
Ore minerals pyrite

Geographic location

Quadrangle map, 1:250,000-scale PM
Quadrangle map, 1:63,360-scale B-3
Latitude 55.287
Longitude -160.673
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is located on western Unga Island approximately 1 mile due south of the head of Zachary Bay. The map site is at an elevation of about 1,100 feet, near the center of sec. 31, T. 56 S., R. 74 W., of the Seward Meridian. It is referred to as PMRGX-10 in Wilson and others (1988, locality 59). The location is accurate to within 1,200 feet.

Geologic setting

Geologic description

At this site propylitically altered dacite(?) in the Oligocene to Miocene Unga Formation (Wilson and others, 1995) locally contains disseminated pyrite and possibly other, undetermined, sulfides. Three rock samples collected here by the U.S. Geological Survey in the 1980s were reported to be anomalous in antimony, arsenic, lead, silver, and zinc (Wilson and others, 1988).
Geologic map unit (-160.675038120711, 55.2861703553425)
Alteration of deposit Dacite(?) at this site exhibits propylitic alteration.

Production and reserves

Workings or exploration Rock samples 85AAi107, and 109-11 collected by the U.S. Geological Survey in the mid-1980s were reported to be anomalous in antimony, arsenic, lead, silver, and zinc (Wilson and others, 1988).
Indication of production None

Additional comments

The site is located on land selected or patented by, or interim-conveyed to, the Aleut Corporation.

References