Occurrence, Inactive

Commodities and mineralogy

Main commodities Au; Pb; Zn
Other commodities As; Ba
Ore minerals pyrite

Geographic location

Quadrangle map, 1:250,000-scale PM
Quadrangle map, 1:63,360-scale C-2
Latitude 55.548
Longitude -160.547
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is located on the Alaska Peninsula about 1 mile east of Balboa Bay. The map site is at an elevation of about 1,000 feet, at the center of sec. 36, T. 53 S., R. 74 W., Seward Meridian (Christie, 1974, color anomaly 77; Wilson and others, 1988, locality 66). The site is referred to as PMRGX-17 in Wilson and others (1988). The location is accurate to within 1,200 feet.

Geologic setting

Geologic description

This occurrence is a 3,000- by 5,000-foot color anomaly (Christie, 1974). The country rocks in the area of the anomaly are volcanic breccias and agglomerates underlain by arkosic and argillaceous sedimentary rock. The volcanic rock, mapped as Miocene (Wilson and others, 1995), is interpreted by Christie to be a vent complex containing sulfides that may be related to fumarolic activity. The rocks exhibit argillic alteration. A silt sample collected by an Aleut-Quintana-Duval joint venture in 1974 contained 0.34 ppm gold. Three samples collected by the U.S. Geological Survey in the mid-1980s were reported to be anomalous in arsenic, barium, gold, lead, and zinc (Wilson and others, 1988).
Geologic map unit (-160.549019045473, 55.5471777423921)
Age of mineralization Miocene or younger.
Alteration of deposit The volcanic rocks here exhibit argillic alteration.

Production and reserves

Workings or exploration An Aleut-Quintana-Duval joint venture briefly mapped and took silt samples in this area in 1974. One sample contained 0.34 ppm gold. Samples 83AYb554, and 557-558 collected during U.S. Geological Survey studies in the mid-1980s were reported to be anomalous in arsenic, barium, lead, 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.