Unnamed (near VABM Way)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu; Fe
Ore minerals azurite; bornite; chalcopyrite; magnetite; malachite; pyrite.
Gangue minerals calcite; quartz

Geographic location

Quadrangle map, 1:250,000-scale HE
Quadrangle map, 1:63,360-scale A-2
Latitude 63.034
Longitude -147.64
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurence is at an elevation of approximately 5,000 feet, 0.6 mile NW of VABM Way and about 2 miles south of Butte Creek. The site is in sec. 6, T. 22 S., R. 1 E., of the Fairbanks Meridian. The location is accurate to within 1000 feet. This is location 37 of Clark and Cobb (1972).

Geologic setting

Geologic description

This occurrence is hosted in Middle Triassic to Upper Pennsylvanian metasedimentary rocks, cut by numerous diabasic and gabbroic dikes and sills (Wilson and others, 1998). The deposit consists of copper sulfides disseminated in the mafic units, and of magnetite along fault zones separating limestone and argillite. The sulfide minerals are bornite, chalcopyrite, and pyrite. Malachite and azurite occur in cross-cutting carbonate veins. Some of the sulfide minerals probably are syngenetic with emplacement of their Upper Paleozoic or Triassic mafic hostrocks. The bornite may represent subsequent supergene enrichment.
Geologic map unit (-147.642254530466, 63.0335476139923)
Mineral deposit model Cyprus massive sulfide (Cox and Singer, 1986; model 24a)
Mineral deposit model number 24a
Age of mineralization Some of the sulfide minerals probably are syngenetic with their Upper Paleozoic Triassic mafic host rocks. The bornite may represent subsequent supergene enrichment.

Production and reserves

Workings or exploration Surface workings and exploration only.
Indication of production None

References

MRDS Number A011359

References

Reporters N. Van Wyck (Stevens Exploration Management Corporation)
Last report date 4/7/2000