Unnamed (Pond Island)

Occurrence, Probably inactive

Commodities and mineralogy

Main commodities Cu
Ore minerals bornite; chalcopyrite; covellite; pyrite; pyrrhotite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale SI
Quadrangle map, 1:63,360-scale B-3
Latitude 57.2704
Longitude -134.8964
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at sea level on the southwest end of Pond Island on the east side of 'The Basin' of Kelp Bay. The occurrence is 0.4 mile west-northwest of the center of sec. 15, T. 53 S., R. 66 E. It is location P-102 of Bittenbender and others (1999), location 64 of Cobb (1972, 1978), and MAS no. 0021140189 (U.S. Bureau of Land Management, 2002). The location probably is accurate within 0.2 mile.

Geologic setting

Geologic description

The rocks in the vicinity of this occurrence are part of the Jurassic and/or Triassic, Kelp Bay Group which consists of phyllite, quartzite, greenschist, greenstone, graywacke, and semischist (Loney and others, 1975). Loney and others (1963) noted pyrite, chalcopyrite, covellite, and bornite in quartz veins and iron-stained siliceous rocks in this area. Bittenbender and others (1999) collected 3 samples of: 1) quartz veins in siliceous greenschist; 2) siliceous metavolcanic rocks with 1 percent pyrite; and 3) mudstone and tuff with up to 5 pyrite and pyrrhotite. Gold values were all less than 5 parts per billion and the highest copper value was 230 parts per million; all of the other common metallic elements were at background level.
Geologic map unit (-134.898157508828, 57.2700613299713)
Mineral deposit model Quartz veins with copper minerals.
Age of mineralization Triassic or younger based on the age of the host rock.
Alteration of deposit Alteration noted but no details.

Production and reserves

Workings or exploration Apparently only surface sampling by government geologists.
Indication of production None

References