Unnamed (east of upper Iniskin Bay)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag; Au; Fe
Other commodities Ti
Ore minerals magnetite

Geographic location

Quadrangle map, 1:250,000-scale IL
Quadrangle map, 1:63,360-scale D-2
Latitude 59.7519
Longitude -153.3938
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 200 feet in an east tributary to Iniskin Bay. It is in the SE1/4 sec. 8, T. 5 S., R. 24 W., Seward Meridian. The location is accurate within 0.5 mile. This occurrence is location 11 of Detterman and Cobb (1972).

Geologic setting

Geologic description

This occurrence consists of small bodies of magnetite-bearing skarn in calcic rocks of the Lower Jurassic Talkeetna Formation about two miles from a Jurassic granitic pluton (Detterman and Reed, 1980). The Talkeetna Formation consists generally of andesite flows, agglomerate, tuff, volcanic breccia, and minor sedimentary rocks (Detterman and Hartsock, 1966).
Geologic map unit (-153.395932564252, 59.7512533610373)
Mineral deposit model Fe skarn (Cox and Singer, 1986; model 18d).
Mineral deposit model number 18d
Age of mineralization Probably Jurassic, during waning stages of intrusion of Jurassic granitic rocks.
Alteration of deposit Formation of skarn in calcic rocks.

Production and reserves

Workings or exploration Exploration probably consists only of regional geologic mapping (Detterman and Hartsock, 1966).
Indication of production None

References