|Quadrangle map, 1:250,000-scale||CR|
|Quadrangle map, 1:63,360-scale||B-2|
|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 descriptionSainsbury (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.|
|Workings or exploration||Only surface sampling by government and industry geologists.|
|Indication of production||None|
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.
|Reporters||D.J. Grybeck (Applied Geology)|
|Last report date||5/1/2004|