Black Hawk and Susie Groups

Prospect(?), Undetermined

Commodities and mineralogy

Main commodities Au
Ore minerals gold
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale SI
Quadrangle map, 1:63,360-scale B-5
Latitude 57.372
Longitude -135.6486
Nearby scientific data Find additional scientific data near this location
Location and accuracy This prospect(?) is at sea level at the south mouth of Fish Bay on northern Baranof Island. The prospect(?) is 0.4 mile north-northwest of the southeast corner of sec. 8, T. 52 S., R. 61 E. It is location P-104 of Bittenbender and others (1999) and MAS no. 0021140147 (U.S. Bureau of Land Management, 2002). The location probably is accurate within a mile.

Geologic setting

Geologic description

Loney and others (1975) map the rocks in the area of this prospect as a Jurassic tonalite stock that contains roof pendants or inclusions of undivided Mesozoic or Paleozoic, amphibolite, gneiss, schist, and marble. The prospect is at or near the contact between the tonalite and a metamorphic roof pendant. Bittenbender and others (1999) describe this prospect as an auriferous quartz vein; samples contained up to 0.45 ounce of gold per ton.
Geologic map unit (-135.650386618304, 57.3716483149951)
Mineral deposit model Low-sulfide gold-quartz vein (Cox and Singer, 1986; model 36a).
Mineral deposit model number 36a

Production and reserves

Workings or exploration Only surface sampling.
Indication of production Undetermined

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