Unnamed (northeast of Slocum Arm)

Occurrence, Undetermined

Commodities and mineralogy

Main commodities Ag; Au
Other commodities Mo; Zn
Ore minerals sphalerite

Geographic location

Quadrangle map, 1:250,000-scale SI
Quadrangle map, 1:63,360-scale B-6
Latitude 57.4933
Longitude -135.7159
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is northeast of Slocum Arm at an elevation of about 1,500 feet, about 1.4 miles north-northeast of the outlet of lake 1052. The occurrence is 0.3 mile northwest of the center of sec. 36, T. 50 S., R. 60 E. It is location P-94 of Bittenbender and others (1999) and MAS no. 0021140221 (U.S. Bureau of Land Management, 2002). The location is accurate.

Geologic setting

Geologic description

Johnson and Karl (1985) map the rocks in the area as Triassic(?) greenstone and Mesozoic or Paleozoic, siliceous metasedimentary and metavolcanic rocks. The rocks are intruded by a stock of Tertiary(?) granodiorite, and cut by high-angle faults that mainly strike northwest.
Bittenbender and others (1999), citing Still and Weir (1981), describe this occurrence as a zone of orange-colored mineralized rock in a gulch along a fault contact between metamorphic rocks and greenstone. Samples of the mineralized material contained up to 12 parts per million (ppm) gold, 7 ppm silver, 3,400 ppm zinc, and 100 ppm molybdenum. The ore minerals are not specified.
Geologic map unit (-135.717698405046, 57.4929454186885)
Alteration of deposit Oxidation of mineralized rock.

Production and reserves

Workings or exploration Only surface sampling.
Indication of production None

References

References

Bittenbender, P., Still, J.C., Maas, K., and McDonald, M., Jr., 1999, Mineral resources of the Chichagof and Baranof Islands area, southeast Alaska: Bureau of Land Management, BLM-Alaska Technical Report 19, 222 p.
U.S. Bureau of Land Management, 2002, Alaska mineral locations database report (Sitka quadrangle), July 2, 2002, 205 p. [http://imcg.wr.usgs.gov/dem.html]
Reporters H.C. Berg (U.S. Geological Survey)
Last report date 10/16/2004