Unnamed (near Kasaan Mountain) (ARDF #CR062) Ag, Au, Pb

Unnamed (near Kasaan Mountain)

Prospects, Probably inactive

Commodities and mineralogy

Main commodities	Ag; Au; Pb
Other commodities	Ba
Ore minerals	chalcopyrite; galena; sphalerite; tetrahedrite
Gangue minerals	barite; calcite; quartz

Geographic location

Quadrangle map, 1:250,000-scale	CR
Quadrangle map, 1:63,360-scale	C-2
Latitude	55.54281
Longitude	-132.36124
Nearby scientific data	Find additional scientific data near this location
Location and accuracy	The location of these prospects is uncertain other than that they are in the vicinity of Kasaan Mountain. For this record, the site is arbitrarily plotted at the top of Kasaan Mountain in the NW1/4 section 16, T. 73 S., R. 86 E. The prospects may be a mile or more from this location.

Geologic setting

Geologic description Wright (1915) mentions vein deposits 1 to 5 feet wide that were prospected at some uncertain location on Kasaan Mountain. They are distinctly different from the many Cu-Fe skarn deposits on the Kasaan Peninsula in that the veins contain galena, tetrahedrite, sphalerite, and chalcopyrite; the gangue is quartz, calcite, and barite, and the veins were valued for their lead, silver, and gold content. No other information is available. A large Silurian or Ordovician diorite pluton is exposed north of Kasaan Mountain and the layered rocks in the vicinity consist of Silurian or Ordovician andesite and metasedimentary rocks (Eberlein and others, 1983; Brew, 1996).
Geologic map unit	(-132.362922972914, 55.5424468256337)
Mineral deposit model	Quartz vein with lead, silver, and gold.
Age of mineralization	The veins are younger than the Silurian or Ordovician host rocks.

Production and reserves

Workings or exploration	None mentioned.
Indication of production	None
Additional comments The Sealaska Corporation holds the subsurface rights to the land in the vicinity of Kasaan Mountain.

References

References Brew, D.A., 1996, Geologic map of the Craig, Dixon Entrance, and parts of the Ketchikan and Prince Rupert quadrangles, southeastern Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-2319, 53 p., 1 sheet, scale 1:250,000. Eberlein, G.D., Churkin, Michael, Jr., Carter, Claire, Berg, H.C., and Ovenshine, A. T., 1983, Geology of the Craig quadrangle, Alaska: U.S. Geological Survey Open-File Report 83-91, 52 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). Wright, C.W., 1915, Geology and ore deposits of Copper Mountain and Kasaan Peninsula, Alaska: U.S. Geological Survey Professional Paper 87, 110 p.
Reporters	D.J. Grybeck (Applied Geology)
Last report date	5/1/2004