Unnamed (northwest of Clearwater Creek near peak 6630)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag
Ore minerals pyrite

Geographic location

Quadrangle map, 1:250,000-scale MH
Quadrangle map, 1:63,360-scale A-6
Latitude 63.2242
Longitude -146.9498
Nearby scientific data Find additional scientific data near this location
Location and accuracy This mineral occurrence is at an elevation of about 6,300 feet on a steep northwest-trending ridge about 1.5 miles northwest of Clearwater Creek. It is about a quarter of a mile west of peak 6630 in the NW1/4 section 24, T. 19 S., R. 4 E., Fairbanks Meridian. The location is probably accurate within a quarter of a mile. The occurrence corresponds to locality 9 in table 2 of Nokleberg and others (1991).

Geologic setting

Geologic description

The rock at this occurrence is a biotite-chlorite-garnet schist, possibly a skarn, in a roof pendant in the East Susitna batholith of Cretaceous age (Nokleberg and others, 1982, 1991). The occurrence is near a regional thrust fault.
The garnetiferous schist is pyritic; a grab sample contained almost 0.5 ounce (15 parts per million) of silver per ton (Nokleberg and others, 1991, locality 9, table 2). The silver-bearing mineral is unknown.
Geologic map unit (-146.952065902861, 63.2237573639877)
Mineral deposit model Pyritic garnetiferous skarn?
Age of mineralization Probably Cretaceous, the age of the granitic intrusion near the site.
Alteration of deposit Contact (?) metamorphism; skarn formation.

Production and reserves

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

References