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  3. Alaska Resource Data File (ARDF)

Unnamed (west of upper Kina Cove)

Occurrences, Undetermined

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Commodities and mineralogy

Main commodities Au; Cu; Zn
Ore minerals chalcopyrite; pyrite; sphalerite
Gangue minerals calcite; quartz

Geographic location

Quadrangle map, 1:250,000-scale CR
Quadrangle map, 1:63,360-scale B-2
Latitude 55.49299
Longitude -132.5329
Nearby scientific data Find additional scientific data near this location
Location and accuracy Sainsbury (1961) reported a mineral occurrence near a logging road on the west side of Kina Cove. Hedderly-Smith (1999 [Inventory]) locates this or another nearby occurrence west of the head of Kina Cove, in the SW1/4 section 32, T. 73 S., R. 85 E. The Hedderly-Smith location is used for this record.

Geologic setting

Geologic description

Sainsbury (1961) reported about 2 percent chalcopyrite in recrystallized limestone in a stream bed on the west side of Kina Cove, and as much as 5 percent chalcopyrite in a knob of recrystallized limestone on the shoreline of the cove. The limestone is probably part of the Descon Formation of Silurian and Ordovician age. At or near this location, Hedderly-Smith (1999 [Inventory]) found a 12-inch-thick quartz-pyrite vein in an altered zone in greenstone. A sample contained 904 parts per million (ppm) copper, 2.14 percent zinc, 3.7 ppm silver, and 910 parts per billion gold.
Geologic map unit (-132.534567632083, 55.4926281295315)
Mineral deposit model Chalcopyrite in marble and quartz vein in greenstone.
Age of mineralization Unknown, other than that the occurrences are in Silurian or Ordovician rocks.
Alteration of deposit Greenstone near a quartz vein is altered.

Production and reserves

Workings or exploration Only surface sampling by government and industry geologists.
Indication of production None

References

MRDS Number A010024

References

Cobb, E. H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Craig quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-869, 262 p.
Hedderly-Smith, D.A., 1999, Inventory of metallic mineral prospects, showings and anomalies on Sealaska lands, 1988 through 1998: Sealaska Corporation, Juneau, Alaska, 217 p. (internal report held by Sealaska Corporation, Juneau, Alaska).
Maas, K.M., Bittenbender, P E., and Still, J.C., 1995, Mineral investigations in the Ketchikan mining district, southeastern Alaska: U.S. Bureau of Mines Open-File Report 11-95, 606 p.
Sainsbury, C.L., 1961, Geology of part of the Craig C-2 quadrangle and adjoining area, Prince of Wales Island, southeastern Alaska: U.S. Geological Survey Bulletin 1058-H, p. H299-H362.
Reporters D.J. Grybeck (Applied Geology)
Last report date 5/1/2004