Galena Creek - East

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag; Ba; Cu; Pb
Ore minerals argentiferous galena; barite; chalcopyrite; malachite

Geographic location

Quadrangle map, 1:250,000-scale TB
Quadrangle map, 1:63,360-scale B-2
Latitude 68.381
Longitude -141.992
Nearby scientific data Find additional scientific data near this location
Location and accuracy Location plotted is locality 502 of Barker (1981, pl. A-3), from which massive galena and barite samples were taken during 1977 USBM field work; near crestline of Bear Mountain ridge on east side of Galena Creek; known to within 500 ft (152.4 m).

Geologic setting

Geologic description

Well-defined northwest-trending quartz vein system about 6.5 ft (2 m) wide by 1500 ft (454 m) long, contains massive galena, malachite and barite; altered calcareous siltstone host rock contains minor disseminated galena and malachite. Vein contains up to 21 percent Cu, though malachite is the only Cu mineral noted in more recent reports; older reports list presence of chalcopyrite in greenstone in general vicinity. Geologic setting is structural dome containing Precambrian-Devonian siltstone, phyllite and greenstone which overlie quartzite (possibly Neurokpuk Fm.) and are overlain by thick Devonian conglomerate (Kanayut and/or Kekiktuk Fm.) and Mississippian shale (Kayak Shale). Siltstone more calcareous and less hornfelsed, and has more associated greenstone than bedrock west of Galena Cr. (TB002), and has more intense but less widespread propylitic alteration. Vein system follows contact with underlying massive white quartzite (Barker, 1981, p. 33-40, 106-137).
Geologic map unit (-141.994724006447, 68.3807682925974)
Mineral deposit model Polymetallic vein (Cox and Singer, 1986; model 22c).
Mineral deposit model number 22c
Alteration of deposit Intensely propylitized locally.

Production and reserves

Workings or exploration Rock sample 2502 has massive galena and barite, and contains 21 percent Cu, 1.2 percent Pb, 5500 ppm Zn, 170 ppm Ag, and 33 ppm Mo, nearby samples 2511 and 2512 have up to 10.3 percent Cu, 1.1 percent Pb, 1200 ppm Zn, 3.3 ppm Ag, and 22 ppm Mo (Barker, 1981, p. 140).
Indication of production None