|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 on the east side of the glacier at the head of the middle fork of Bond Creek. It is at an elevation of about 7,000 feet, 1,300 feet southwest of peak 8075, and 1,000 feet east of the glacier. The occurrence is about 0.4 mile west of the center of section 34, T. 5 N., R. 15 E. of the Copper River Meridian. It is locality 15 of Richter (1973), locality 32 of Richter and others (1975), and National Park Service locality WRST-40 (unpublished data).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 descriptionAt this occurrence, brecciated and highly altered volcanic rocks of the upper Paleozoic Tetelna Volcanics are cemented by quartz that contains minor pyrite and chalcopyrite (Richter, 1973; Richter and others, 1975; Richter, 1976). A sample of altered volcanic rock contained 1,500 parts per million copper (Richter and Matson, 1970 [OFR 70-276]). The volcanic rocks are intruded by small Tertiary porphyry dikes and stocks.
|Geologic map unit||(-142.625228644928, 62.1715136160856)|
|Mineral deposit model||Quartz breccia with chalcopyrite|
|Age of mineralization||Tertiary? The mineralization may be related to the small Tertiary intrusives in the area.|
|Alteration of deposit||The host rocks to this deposit are highly altered but the type and extent of alteration have not been reported. The area is iron-stained.|
|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|