The prospect is in West Chichagof-Yakobi Wilderness.
Location: 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).
Geology: 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.
Workings: Apparently only surface sampling.
Commodities (Major) - Cu, Zn
Development Status: Undetermined.
Deposit Model: Polymetallic vein? (Cox and Singer, 1986; model 22c).
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. Johnson, B.R, and Karl, S.M., 1985, Geologic map of western Chichagof and Yakobi Islands, southeastern Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map 1-1506, 1 sheet, scale 1:125,000. 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]
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Map Reference: 57°50'49"N , 136°8'38"W
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Mineral List: |
Chalcopyrite ?  | | | | Reference: | [U.S. Geological Survey, 2008, Alaska Resource Data File (ARDF): U.S. Geological Survey Open-File Report 2008-1225.] |
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Sphalerite | | | | Reference: | [U.S. Geological Survey, 2008, Alaska Resource Data File (ARDF): U.S. Geological Survey Open-File Report 2008-1225.] |
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2 entries listed. 2 valid minerals.
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