Unnamed (south of Chignik)

Occurrence, Inactive

Commodities and mineralogy

Ore minerals pyrite; pyrrhotite

Geographic location

Quadrangle map, 1:250,000-scale CG
Quadrangle map, 1:63,360-scale B-2
Latitude 56.27
Longitude -158.39
Nearby scientific data Find additional scientific data near this location
Location and accuracy The approximate location of this occurrence is 1.5 miles south of the village of Chignik (Fields, 1977, locality 8). Site is accurate to within 2 miles.

Geologic setting

Geologic description

This site represents a 3-square-mile color anomaly which generally corresponds in location to a Tertiary quartz diorite stock containing up to 0.25 percent disseminated pyrite. The stock cuts sedimentary rocks of the Tolstoy Formation (Eocene and Paleocene age). The siltstones and sandstones near the intrusive are hornfelsed and carry up to 5 percent pyrrhotite (Fields, 1977).
Geologic map unit (-158.392033972379, 56.2692219568863)
Mineral deposit model Porphyry copper? (Cox and Singer, 1986; model 17).
Mineral deposit model number 17?
Age of mineralization Tertiary.

Production and reserves

Workings or exploration The area was examined by Bear Creek Mining Company during the period 1975-1976 (Fields, 1977).
Indication of production None

Additional comments

This site is located on land conveyed to or patented by the Bristol Bay Native Corporation.

References

MRDS Number 10307320
Reporters S.H. Pilcher (Anchorage)
Last report date 2/8/2000