Saturn

Prospect, Inactive

Commodities and mineralogy

Main commodities Zn
Other commodities Ag; Cu
Ore minerals chalcopyrite; pyrrhotite; sphalerite

Geographic location

Quadrangle map, 1:250,000-scale MG
Quadrangle map, 1:63,360-scale B-2
Latitude 62.29
Longitude -153.66
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Saturn prospect is situated on an east-west ridgeline that divides an unnamed, northwest-flowing tributary leading into Smith Lake from an unnamed, east-flowing tributray of Post River; it is at an elevation of 5,350 feet (1,631 m) in the SE1/4 sec. 35, T. 26 N., R. 24 W., of the Seward Meridian. The location is based on maps supplied by Brewer and others (1992), and is only approximately known.

Geologic setting

Geologic description

The Saturn Prospect consists of discontinuous layers of massive to semi-massive sphalerite and pyrrhotite within a 300 meter by 10 meter wide skarn zone in limestone of the Barren Ridge Limestone, a unit of the Dillinger subterrane (Bundtzen Harris, and Gilbert, 1997). The limestone is adjacent to highly altered, Late Cretaceous, Veleska Lake Volcanic field, which has in turn been intruded by a weakly mineralized granite porphyry pluton about 300 meters from the prospect (Bundtzen, Kline, and Clough, 1982).
Results of limited grab samples conducted by North Pacific Mining Company show values ranging up to 0.3 percent copper, 20.9 percent zinc, and 9.3 grams/tonne silver (Brewer and others, 1992).
Geologic map unit (-153.662223877937, 62.2893890616035)
Mineral deposit model Low temperature lead-zinc skarn (Cox and Singer, 1986; model 18c).
Mineral deposit model number 18c
Age of mineralization Unknown; may be related to dated Tertiary intrusions of area (Solie and others, 1991).
Alteration of deposit Sericite in granite intrusion.

Production and reserves

Workings or exploration The Saturn prospect was discovered by the Anaconda Minerals Company in 1980 or 1981 (Brewer and others, 1992). Results of limited grab samples collected by North Pacific Mining Company show values of up to 0.3 percent copper, 20.9 percent zinc, and 9.3 grams/tonne silver (Brewer and others, 1992).
Indication of production None
Reserve estimates None.

References