Cable

Prospect, Undetermined

Commodities and mineralogy

Main commodities Cu; Zn
Ore minerals chalcopyrite; sphalerite

Geographic location

Quadrangle map, 1:250,000-scale SI
Quadrangle map, 1:63,360-scale D-7
Latitude 57.847
Longitude -136.1436
Nearby scientific data Find additional scientific data near this location
Location and accuracy The location of the Cable prospect is only known approximately to be about 1.4 miles east of the top of Mine Mountain on northwest Chichagof Island. For this record, the prospect is plotted is at an elevation of 1,000 feet, 0.6 mile southwest of the center of sec. 26, T. 46 S., R. 57 E. It is location P-32 of Bittenbender and others (1999) and MAS no. 0021140305 (U.S. Bureau of Land Management, 2002).

Geologic setting

Geologic description

Johnson and Karl (1985) map the rocks in the area of this prospect as Mesozoic or Paleozoic, metamorphosed sedimentary and volcanic rocks intruded by northwest-trending, linear stocks of Cretaceous or Tertiary quartz diorite and tonalite. The prospect is at or near the contact between the metamorphic and intrusive rocks. The rocks are cut by prominent northwest-striking, steeply-dipping faults; the most prominent is the regional-scale Border Ranges Fault whose trace is about 4 miles southwest of the prospect.
Bittenbender and others (1999), citing Kimball (1982), describe the prospect as a mineralized fault zone in metasedimentary rocks. The zone contains unspecified disseminated copper and zinc minerals; samples assayed up to 2,200 parts per million (ppm) copper and 4,800 ppm zinc across 5 feet.
Geologic map unit (-136.145426783066, 57.8466153002068)
Mineral deposit model Polymetallic vein? (Cox and Singer, 1986; model 22c).
Mineral deposit model number 22c?

Production and reserves

Workings or exploration Apparently only surface sampling.
Indication of production Undetermined

Additional comments

The prospect is in West Chichagof-Yakobi Wilderness.

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