Unnamed (on Chitistone Mountain)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Au; Ba
Ore minerals barite; gold
Gangue minerals calcite

Geographic location

Quadrangle map, 1:250,000-scale MC
Quadrangle map, 1:63,360-scale B-4
Latitude 61.4893
Longitude -142.4889
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is on Chitistone Mountain. It is at an elevation of about 6,500 feet, 2,000 feet west-southwest of elevation 6844 in the SW1/4 of section 27, T. 4 S., R. 16 E. of the Copper River Meridian. This is locality 86 of MacKevett (1976); the location is accurate to within about 1,000 feet.

Geologic setting

Geologic description

This occurrence consists of a 30-foot-wide altered zone that contains calcite and barite that is localized along a thrust fault in Triassic limestone (MacKevett, 1976). A sample of the altered zone contained 2,000 parts per million (ppm) arsenic, 0.03 ppm gold, more than 5,000 ppm barium, 500 ppm nickel, and more than 20 percent iron (MacKevett and Smith, 1968).
Geologic map unit (-142.490971510476, 61.4888741967861)
Mineral deposit model Barite vein or replacement
Age of mineralization Triassic or younger based on the age of the host rocks.
Alteration of deposit Calcite and barite replacement?

Production and reserves

Workings or exploration Limited surface sampling.
Indication of production None

Additional comments

The locality is in the Wrangell-Saint Elias National Park and Preserve.

References