Unnamed (north tributary to East Fork, Iron Creek)

Prospect, Inactive

Commodities and mineralogy

Main commodities Ag; Cu
Other commodities Au
Ore minerals chalcopyrite; pyrite; pyrrhotite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale TK
Quadrangle map, 1:63,360-scale B-4
Latitude 62.3497
Longitude -148.8163
Nearby scientific data Find additional scientific data near this location
Location and accuracy This prospect is at an elevation of about 4,000 feet on a southwest-flowing tributary to the East Fork, Iron Creek; it is about 1.8 miles west-southwest of VABM Sedan. The location is accurate to within 1/2 mile. This is locality 64 of Csejtey and Miller (1978) and locality 64 of Singer and others (1978).

Geologic setting

Geologic description

This prospect consists of quartz float that contains pyrite, chalcopyrite, and possibly pyrrhotite. It is on or near a sheared contact, possibly a thrust fault, between Triassic(?) metavolcaniclastic rocks and Jurassic plutonic and metamorphic rocks (Csejtey and others, 1978; Schmidt and others, 2002). A float sample contains 7 parts per million silver, 0.9 part per million gold, and 5,000 parts per million copper (Miller and others, 1978).
Geologic map unit (-148.818514292983, 62.3492095860903)
Mineral deposit model Basaltic Cu? (Cox and Singer, 1986; model 23?)
Mineral deposit model number 23?

Production and reserves

Workings or exploration Only surface sampling by the U.S. Geological Survey (Miller and others, 1978).
Indication of production None

References

MRDS Number A012181

References

Reporters R.K. Rogers (U. S. Geological Survey contractor)
Last report date 10/1/2002