Emma Dome

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag; Au; Cu
Ore minerals malachite; unspecified copper sulfides
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale WI
Quadrangle map, 1:63,360-scale B-1
Latitude 67.3213
Longitude -150.4104
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 3,900 feet, in the SE1/4 section 22, T. 29 N., R. 13 W., of the Fairbanks Meridian. It is 0.2 mile south of hill 4465. The location is accurate.

Geologic setting

Geologic description

This occurrence is a quartz vein in Devonian schist and marble (Brosge and Reiser, 1972). A sample contains 0.04 to 0.079 ppm gold and 6.0 to 19 ppm silver. Brosge and Reiser (1960) earlier reported copper sulfides and malachite along the contact between the schist and marble.
Geologic map unit (-150.413137546206, 67.3208655194452)
Alteration of deposit Oxidation of copper mineral(s).

Production and reserves

Workings or exploration Only surface sampling.
Indication of production None

Additional comments

This occurrence is in Gates of the Arctic National Park and Preserve.

References