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Slim and Jim

Prospect, Probably inactive

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Commodities and mineralogy

Main commodities Cu; Ni; Zn
Ore minerals chalcopyrite; sphalerite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale SI
Quadrangle map, 1:63,360-scale D-8
Latitude 57.8211
Longitude -136.3977
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Slim and Jim prospect is at sea level on an unnamed islet at the west mouth of Islas Bay. The prospect is about 0.4 mile south-southeast of the center of section 6, T. 47 S., R. 56 E. It is location P-40 of Bittenbender and others (1999) and MAS no. 0021140119 (U.S. Bureau of Land Management, 2002). The location is accurate within about 0.2 mile.

Geologic setting

Geologic description

Johnson and Karl (1985) describe the rocks in the area of this prospect as Cretaceous graywacke, cut by one or more northwest-striking, high-angle faults. Bittenbender and others (1999), citing the work of Kimball (1982), describe the deposit as a copper-bearing [quartz?] vein in a fault in graywacke. Samples across about 7 feet of the vein contained up to 1 percent copper, 0.3 percent zinc, and 200 parts per million nickel.
Geologic map unit (-136.399540933809, 57.820722454385)
Mineral deposit model Polymetallic vein? (Cox and Singer, 1986; model 22c).
Mineral deposit model number 22c?
Age of mineralization Cretaceous or younger.

Production and reserves

Indication of production None

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.
Kimball, A.L., 1982, Mineral land assessment of Yakobi Island and adjacent parts of Chichagof Island, southeastern Alaska: U. S. Bureau of Mines Mineral Land Assessment report, MLA 97-82, 199 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