Unnamed (near Kake)

Occurrence, Undetermined

Commodities and mineralogy

Main commodities Ag; Au; Cu; Zn
Ore minerals chalcopyrite; pyrite; sphalerite
Gangue minerals calcite

Geographic location

Quadrangle map, 1:250,000-scale PE
Quadrangle map, 1:63,360-scale D-6
Latitude 56.9889
Longitude -133.9636
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is in a rock pit about a mile northwest of the town of Kake. It is about 0.5 mile, west-northwest of the center of section 27, T. 56 S., T. 72 E. The location is accurate.

Geologic setting

Geologic description

This occurrence was found in a reconnaissance of logging roads on northwest Kupreanof Island by Still and others (2002) during a Bureau of Land Management mineral assessment. The occurrence consists of two or three calcite veins with pyrite, sphalerite, and chalcopyrite in siliceous argillite. The veins are about 1 inch thick and extend for about 20 feet where they are cut off by a fault. The rocks in the area consist of argillite and graywacke of the Mississippian and Devonian Cannery Formation and Mesozoic phyllite and slate (Brew and other, 1984). A representative sample of the veins contained 1,135 parts per billion gold, 30.5 parts per million (ppm) silver, 7,327 ppm copper, and 5.4 percent zinc.
Geologic map unit (-133.965326415449, 56.9885631423087)
Mineral deposit model Thin calcite veins with pyrite, sphalerite, and chalcopyrite.
Age of mineralization Mississippian or younger based on the age of the host rocks.

Production and reserves

Workings or exploration Only limited sampling by government geologists.
Indication of production None

Additional comments

This occurrence is on lands that belong to the Kake Village Corporation.

References

References

Still, J.C., Bittenbender, P.E., Bean, K.W., and Gensler, E.G., 2002, Mineral assessment of the Stikine area, central Southeast Alaska: U.S. Bureau of Land Management Technical Report 51, 560 p.
Reporters D.J. Grybeck (Port Ludlow, WA)
Last report date 4/8/2007