Kusturin and Johnson

Occurrence, Inactive

Commodities and mineralogy

Main commodities Au
Ore minerals chalcopyrite; gold; pyrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale SV
Quadrangle map, 1:63,360-scale C-1
Latitude 59.62
Longitude -150.18
Nearby scientific data Find additional scientific data near this location
Location and accuracy The occurrence overlooks Taroka Arm and is on the south flank of Hill 3835 at about 1,300 feet in elevation . Taroka Arm is the southeastern arm of Two Arm Bay. This is MacKevett and Holloway's (1977) location 20 and is accurate to within half a mile.

Geologic setting

Geologic description

Three, quartz-pyrite veins intrude Cretaceous Valdez Group graywacke and slate (MacKevett and Holloway, 1977). The veins are 2 to 6 feet thick. Martin and others (1915) visited one of the veins that strikes N27E and dips 40W. It was 71 inches thick and contained pyrite, chalcopyrite, and graphite. No assay results are reported.
Geologic map unit (-150.182122684428, 59.6194279926662)
Mineral deposit model Low-sulfide, Au-quartz vein (Cox and Singer, 1986; model 36a)
Mineral deposit model number 36a
Age of mineralization Cretaceous or younger; the veins cut Cretaceous graywacke.
Alteration of deposit None reported.

Production and reserves

Workings or exploration Some minor stripping was reported by Martin and others (1915).
Indication of production Undetermined
Reserve estimates None reported.
Production notes No production is known.

Additional comments

This prospect is within Kenai Fjords National Park; the area is closed to mineral entry.

References