Unnamed (northwest of lower Jay Creek)

Prospect, Inactive

Commodities and mineralogy

Main commodities Cu
Other commodities As; Bi
Ore minerals malachite; pyrite; pyrrhotite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale TK
Quadrangle map, 1:63,360-scale D-2
Latitude 62.8653
Longitude -147.8169
Nearby scientific data Find additional scientific data near this location
Location and accuracy This prospect is at an elevation of about 4,200 feet, 0.6 mile southeast of hill 5483, in the NW1/4NW1/4 sec. 17, T. 32 N., R. 9 E., Seward Meridian The location is accurate to within 1/4 mile. This is locality B29 of Kurtak and others (1992).

Geologic setting

Geologic description

This prospect consists of disseminated pyrite and pyrrhotite in Pennsylvanian to Lower Permian mafic metavolcanic rocks (Csejtey and others, 1978; Kurtak and others, 1992). Workings consist of a 3-foot-deep prospect pit. Malachite-bearing quartz veins cut the metavolcanic rocks. A U.S. Bureau of Mines sample of a malachite-stained quartz vein contains 596 parts per million copper and 130 parts per million arsenic (Kurtak and others, 1992). A sample of intermediate volcanic rock contains 200 parts per million arsenic and 10 parts per million bismuth (Miller and others, 1978). Workings consist of a 3-foot-deep prospect pit.
Geologic map unit (-147.819138881386, 62.8648414715181)
Mineral deposit model Basaltic copper? (Cox and Singer, 1986; model 23?)
Mineral deposit model number 23?
Alteration of deposit Oxidation of copper mineral.

Production and reserves

Workings or exploration Workings consist of a 3-foot-deep prospect pit. Limited sampling by the Bureau of Mines (Kurtak and others, 1992) and the U.S. Geological Survey (Miller and others, 1978).
Indication of production None

Additional comments

MAS/MILS number 20760091.

References