Unnamed (northeast shore of Deep Bay)

Occurrence, Undetermined

Commodities and mineralogy

Main commodities Au
Ore minerals gold

Geographic location

Quadrangle map, 1:250,000-scale SI
Quadrangle map, 1:63,360-scale B-5
Latitude 57.4511
Longitude -135.6347
Nearby scientific data Find additional scientific data near this location
Location and accuracy The location of this (placer?) occurrence is known only approximately; it is on the northeast shore of Deep Bay, about 0.8 mile from the head of the bay. The occurrence is 0.2 mile west of the center of sec. 16, T. 51 S., R. 61 E. It is location P-97 of Bittenbender and others (1999) and MAS no. 0021140303 (U.S. Bureau of Land Management, 2002).

Geologic setting

Geologic description

Johnson and Karl (1985) map the rocks in the vicinity of this occurrence as part of a Tertiary(?) granodiorite stock. The stock contains roof pendants and inclusions of Mesozoic or Paleozoic amphibolite, gneiss, schist, and marble; the rocks are cut by high-angle, mainly northwest-striking faults. Bittenbender and others (1999), citing Kimball (1982), report that a stream-sediment sample at this site contained 12 parts per million gold, but that no gold was found in other samples.
Geologic map unit (-135.636490562061, 57.4507485720763)
Mineral deposit model Placer gold? (Cox and Singer, 1986; model 39a).
Mineral deposit model number 39a?
Age of mineralization Quaternary.

Production and reserves

Workings or exploration Only stream 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