Unnamed (bank of Clearwater Fork)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag
Other commodities Pb
Ore minerals galena; pyrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale DN
Quadrangle map, 1:63,360-scale C-1
Latitude 63.7109
Longitude -150.3393
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is on the west bank of the Clearwater Fork about 1.5 miles below the mouth of Canyon Creek. It is in the SE1/4SW1/4 section 7, T. 14 S., R. 14 W., Fairbanks Meridian. The location is probably accurate within 500 feet. The occurrence was first reported by Thornsberry, McKee, and Salisbury (1984, no. 112).

Geologic setting

Geologic description

The country rock at this occurrence is quartzite of the Birch Creek Schist. The quartzite is cut by quartz veins and a mineralized fault zone. Samples of a foot-thick quartz vein containing pyrite and sparse galena assayed 0.51 percent lead and 11 ppm silver. No gold was detected and only background levels of zinc and antimony (Thornsberry, McKee, and Salisbury, 1984, v. 2, occurrence 112).
Geologic map unit (, )
Mineral deposit model Low-sulfide quartz vein.
Age of mineralization The deposit is assumed to be Eocene (see record DN091).

Production and reserves

Workings or exploration The deposit was discovered by U.S. Bureau of Mines geologists in 1983 (Thornsberry, McKee, and Salisbury, 1984). There are no workings.
Indication of production None

Additional comments

The occurrence is in Denali National Park and Preserve.