Prospect, Inactive

Commodities and mineralogy

Main commodities Ag; Au
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale PM
Quadrangle map, 1:63,360-scale A-2
Latitude 55.188
Longitude -160.568
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Empire prospect is located on Unga Island approximately 4,000 feet southwest of the lower adit portal of the Apollo mine (PM079) (Wilson and others, 1988, locality 33). The location is accurate to within 2,500 feet.

Geologic setting

Geologic description

The Empire prospect is described as vuggy quartz veins, less than 0.5 inch wide, cutting iron-oxide-stained, silicified andesite (Wilson and others, 1988). The andesite is part of the late Eocene to early Oligocene Popof volcanic rocks (Wilson and others, 1995). By analogy with other deposits in the area, the veins presumably contain small amounts of gold or silver.
Geologic map unit (-160.570041478737, 55.1871694810473)
Mineral deposit model Epithermal gold veins
Age of mineralization Eocene or younger.
Alteration of deposit The alteration consists of silicification of andesite.

Production and reserves

Workings or exploration A 150-foot, south-trending adit is present on the prospect. In 1983 UNC Teton Exploration Drilling Company drilled three core holes for a total of 4,737 feet, conducted VLF and EM surveys, and trenched the prospect.
Indication of production None



Reporters S.H. Pilcher
Last report date 1/12/2001