Unnamed (south of upper Caribou Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag; Bi; W
Other commodities Pb
Ore minerals pyrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale HU
Quadrangle map, 1:63,360-scale A-6
Latitude 66.1314
Longitude -155.9685
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is on the northeast side of the Zane Hills, south of upper Caribou Creek. The map site is at an elevation of about 2,150 feet, about 0.5 mile south-southwest of the center of section 31, T. 9 N., R. 14 E. of the Kateel River Meridian. The location is accurate within one-half mile.

Geologic setting

Geologic description

This occurrence consists of pyritiferous, silicified, fine-grained intrusive rock near the contact between two phases of the Cretaceous, Zane Hills pluton (Miller and Ferrians, 1968). The principal phase is granodiorite and quartz monzonite; the other is a border phase of porphyritic monzonite and quartz monzonite. A sample of the principal phase near the contact contains 200 ppm silver, 1,000 ppm bismuth, 700 ppm tungsten, and 500 ppm lead (Miller and Ferrians, 1968). No other information is available.
Geologic map unit (-155.971147823213, 66.1308352285976)
Mineral deposit model Porphyry Cu-Au? (Cox and Singer, 1986; model 20c?).
Mineral deposit model number 20c?
Age of mineralization The Zane Hills pluton is 81 Ma as dated by K/Ar methods (Miller and others, 1966).
Alteration of deposit Pyritization and silicification of pluton.

Production and reserves

Workings or exploration Only surface sampling.
Indication of production None