|Quadrangle map, 1:250,000-scale||NB|
|Quadrangle map, 1:63,360-scale||A-4|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is about 2.3 miles east of the head of Nikonda Creek. It is at an elevation of about 7,400 feet, 3,500 feet southeast of peak 8701 in the SW1/4 of section 21, T. 4 N., R. 15 E. of the Copper River Meridian. This is locality 12 of Richter (1973), locality 33 of Richter and others (1975), and National Park Service locality WRST-48 (unpublished data). This locality is included as an 'Unnamed occurrence' by Cobb and Richter (1980). It is located to within a few hundred feet.|
Geologic descriptionThis occurrence is a quartz vein with minor chalcopyrite, galena, and sphalerite; the vein cuts volcanic rocks of the upper Paleozoic Tetelna Volcanics (Richter, 1973; Richter and others, 1975; Richter, 1976). A sample of sulfide-bearing quartz contained 1 parts per million (ppm) gold, 30 ppm silver, 15,000 ppm copper, 15,000 ppm lead, and more than 10,000 ppm zinc (Richter and Matson, 1970 [OFR 70-276]).
|Geologic map unit||(-142.684327622225, 62.1096069342948)|
|Mineral deposit model||Polymetallic veins (Cox and Singer, 1986; model 22c)|
|Mineral deposit model number||22c|
|Age of mineralization||Cretaceous or Tertiary? Probably the same age as other base and precious metal deposits in the Nabesna A-4 quadrangle (for example NB043, NB045, and NB050).|
|Indication of production||None|
Additional commentsThe occurrence is in the Wrangell-St. Elias National Preserve.
Cobb, E.H., and Richter, D.H., 1980, Summaries of data on and list of references to metallic and selected nonmetallic mineral deposits in the Nabesna quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-927, 117 p.
Richter, D.H., 1976, Geologic map of the Nabesna quadrangle, Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I-932, 1 sheet, scale 1:250,000.
Richter, D.H., and Matson, N.A., Jr., 1970, Geochemical data from the Nabesna A-4 quadrangle, Alaska: U.S. Geological Survey Open-File Report 70-276, 14 p., 1 sheet, scale 1:63,360.
|Reporters||Travis L. Hudson (Applied Geology)|
|Last report date||11/24/2002|