Unnamed (northwest of Clearwater Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Zn
Ore minerals pyrite; sphalerite
Gangue minerals garnet; white mica

Geographic location

Quadrangle map, 1:250,000-scale MH
Quadrangle map, 1:63,360-scale A-6
Latitude 63.2323
Longitude -146.94
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 5,400 feet, about a mile north of Clearwater Creek. It is in the SE1/4SE1/4 section 27, T. 19 S., R. 4 E., Fairbanks Meridian. The occurrence corresponds to locality 10 in table 2 of Nokleberg and others (1991). The location is probably accurate within a quarter of a mile.

Geologic setting

Geologic description

The rock at this occurrence is mica-garnet schist and amphibolite of the Maclaren Glacier metamorphic belt (Nokleberg and others, 1982, 1991). The area is traversed by a series of thrust faults, including the Meteor Fault. Metamorphism and thrusting are probably of Cretaceous age.
The mineral occurrence is pyritic white-mica and garnet schist. A grab sample of the schist contained 1,000 parts per million zinc (Nokleberg and others, 1991, locality 10, table 2), probably contained in a discrete mineral such as sphalerite.
Geologic map unit (-146.942266658423, 63.2318576760055)
Age of mineralization Either the age of the protolith or synchronous with Cretaceous (?) metamorphism and thrusting.

Production and reserves

Workings or exploration There are no workings at the site.
Indication of production None

References