Prospect, Inactive

Commodities and mineralogy

Main commodities Cu; Zn
Ore minerals chalcopyrite; pyrite; sphalerite
Gangue minerals calcite; epidote; quartz

Geographic location

Quadrangle map, 1:250,000-scale BS
Quadrangle map, 1:63,360-scale D-7
Latitude 59.965
Longitude -149.284
Nearby scientific data Find additional scientific data near this location
Location and accuracy The occurrence is on the east side of the south arm of Humpy Cove (formerly called Sunny Bay by Martin and others,1915) in the NE1/4 of section 33, T. 3 S., R. 1 E., of the Seward Meridian. This is Tysdal's ( 1978) location 107 and is accurate to within a quarter mile.

Geologic setting

Geologic description

The mineralization is within a brecciated shear zone of Cretaceous Valdez Group greenstone (Tysdal and Case, 1979). The cement of the breccia is composed of quartz, calcite, sphalerite, pyrite, epidote, and chalcopyrite. A tunnel, 35 feet long, has been run along a shear zone that strikes N 32 W and dips 68 W. About 200 feet southwest of this tunnel another shear occurs which has been drifted on for about 35 feet. This zone is about six feet wide and strikes N 12 W with a vertical dip (Martin and others, 1915). No assay results are reported for this prospect.
Geologic map unit (-149.286133675842, 59.9644396905992)
Mineral deposit model Cyprus massive sulfide (Cox and Singer, 1986; model 24a).
Mineral deposit model number 24a
Age of mineralization Cretaceous or younger; breccia zone in Cretaceous greenstone.

Production and reserves

Workings or exploration Two tunnels each about 35 feet in length were driven prior to 1915. No assay results were reported (Martin and others, 1915).
Indication of production None

Additional comments

Prior to 1953 Humpy Cove was known as Sunny Cove.