Unnamed (Middle Arm Kelp Bay)

Occurrence, Probably inactive

Commodities and mineralogy

Ore minerals bornite; chalcopyrite; covellite; pyrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale SI
Quadrangle map, 1:63,360-scale B-3
Latitude 57.3319
Longitude -134.9942
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 100 feet on the south shore of the Middle Arm of Kelp Bay. The occurrence is 0.2 mile west of the center of sec. 28, T. 52 S., R. 65 E. It is location P-99 of Bittenbender and others (1999), location 62 of Cobb (1972, 1978), and MAS no. 0021140188 (U.S. Bureau of Land Management, 2002). The location 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) sampled a quartz veinlet with minor pyrite and a trace of chalcopyrite. The samples had low metal values; the only elements of note were from less than 5 to 10 parts per billion gold and up to 192 parts per million copper.
Geologic map unit (-134.995961521439, 57.3315583765082)
Mineral deposit model Quartz veins with copper minerals in low-grade metamorphic rocks.
Age of mineralization Triassic or younger based on the age of the host rock.

Production and reserves

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