Unnamed (east of Iniskin River)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu
Ore minerals copper sulfides

Geographic location

Quadrangle map, 1:250,000-scale IL
Quadrangle map, 1:63,360-scale D-2
Latitude 59.8015
Longitude -153.4436
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 1,000 feet about halfway between the Iniskin River and Roscoe Glacier. The site is in the NW1/4 sec. 29, T. 4 S., R. 24 W., Seward Meridian. The location is accurate within 0.5 mile. The occurrence is location 9 of Detterman and Cobb (1972).

Geologic setting

Geologic description

Unidentified copper sulfides occur in tactite(?) near the contact between Jurassic or older metamorphic rocks (Kakhonak Complex) and Jurassic quartz monzonite and diorite (Detterman and Reed, 1964, 1980). The Kakhonak Complex consists of schist, gneiss, quartzite, marble, phyllite, argillite, and slate, which are exposed chiefly as roof pendants in the Jurassic plutons.
Geologic map unit (-153.445751221363, 59.8008527986176)
Mineral deposit model Cu skarn? (Cox and Singer, 1986; model 18b).
Mineral deposit model number 18b?
Age of mineralization Probably Jurassic. The tactite(?) developed in bedrock of the Kakhonak Complex during emplacement of the Jurassic plutons.
Alteration of deposit Development of tactite in calcareous rocks(?).

Production and reserves

Workings or exploration Exploration apparently consists only of regional geologic mapping (Detterman and Reed, 1964, 1980).
Indication of production None

References

MRDS Number A013039

References

Reporters C.C. Hawley, Hawley Resource Group, Anchorage, Alaska
Last report date 6/3/2003