Long Bay

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag; Cu
Ore minerals chalcopyrite; pyrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale SR
Quadrangle map, 1:63,360-scale D-1
Latitude 60.9982
Longitude -147.3268
Nearby scientific data Find additional scientific data near this location
Location and accuracy The occurrence is about 0.5 mile northwest of the summit of hill 2301 in the SE1/4 section 33, T. 11 N., R. 12 E., of the Seward Meridian. This is location S-117 of Jansons and others (1984). This location is accurate to within a quarter of a mile.

Geologic setting

Geologic description

The occurrence is in graywacke and consists of a 10-foot-wide shear zone containing quartz veins carrying chalcopyrite and pyrite (Jansons and others, 1984). Nelson and others (1985) mapped the bedrock in this area as Valdez Group of Late Cretaceous age.
This occurrence was discovered by the U.S. Bureau of Mines. They collected a grab sample that contained 0.6 percent copper and 26 ppm silver (Jansons and others, 1984).
Geologic map unit (-147.328872018646, 60.9976611142127)
Mineral deposit model Besshi massive sulfide (Cox and Singer, 1986; model 24b)
Mineral deposit model number 24b
Age of mineralization Cretaceous or younger; the deposit is in a shear zone that cuts rocks of the Valdez Group of Late Cretaceous age.

Production and reserves

Workings or exploration This occurrence was discovered by the U.S. Bureau of Mines. They collected a grab sample that contained 0.6 percent copper and 26 ppm silver (Jansons and others, 1984).
Indication of production None

References