Columbia Claim, Columbia Red Metals Group

Prospect, Inactive

Commodities and mineralogy

Main commodities Ag; Cu; Pb; Zn
Ore minerals chalcopyrite; galena; pyrite; sphalerite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale AN
Quadrangle map, 1:63,360-scale A-1
Latitude 61.11
Longitude -147.13
Nearby scientific data Find additional scientific data near this location
Location and accuracy 4,600 ft east of the eastern shore of Kadin Lake, on a peninsula sticking into Columbia Glacier. Accurate within 1/2 mile. Locality A-1 of Jansons and others (1984).

Geologic setting

Geologic description

Jansons and others (1984) reported four shear zones that range in size from 3 inches to 18 ft wide cutting massive, clast-supported pebble, cobble, and boulder conglomerate and matrix-supported pebbly mudstone and sandstone of the Tertiary Orca Group. Shear zones are traceable for 800 ft along strike. Zones contain sulfide occurrences ranging from 1 inch wide veinlets of chalcopyrite and pyrite to 4 ft wide zones of chalcopyrite. Sulfide deposits are traceable for about 200 ft.
Six chip samples contained 700 ppm to 7 percent copper, 0.33 oz/ton to 8 oz/ton Ag, 0.16 to 0.87 percent Zn, and 240 ppm to 720 ppm Pb. Grab sample contained 0.12 percent Cu, 15.4 ppm Ag, 0.18 percent Zn and 815 ppm Pb (Jansons and others, 1984).
Geologic map unit (-147.132069875895, 61.1094492505826)
Age of mineralization Paleocene or younger; mineralized shear zones are in sedimentary rocks of the Early Tertiary Orca Group.

Production and reserves

Workings or exploration Open pits, but no production reported. Six chip samples contained 700 ppm to 7 percent copper, 0.33 oz/ton to 8 oz /ton Ag, 0.16 to 0.87 percent Zn, and 240 ppm to 720 ppm Pb. Grab sample contained 0.12 percent Cu, 15.4 ppm Ag, 0.18 percent Zn and 815 ppm Pb. Low mineral development potential (Jansons and others, 1984).
Indication of production None
Reserve estimates Inferred reserves 11,000 tons at 1.57 percent Cu and 50 ppm Ag (Jansons and others, 1984).

References

MRDS Number A106212
Reporters D.P. Bickerstaff (USGS contractor); S.W. Huss (USGS)
Last report date 7/30/1998