|Quadrangle map, 1:250,000-scale||MC|
|Quadrangle map, 1:63,360-scale||B-4|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is on a ridge crest south of Twaharpies Glacier (MacKevett and Smith, 1972). It is at an elevation of about 6,950 feet, 600 feet south of elevation 7080 and 500 feet north of the center of section 15, T. 6 S., R. 18 E. of the Copper River Meridian. This is locality 47 of MacKevett (1976); the location is accurate to within about 100 feet.|
Geologic descriptionThis occurrence consists of azurite and malachite in a narrow shear zone that cuts Permian sedimentary rocks (MacKevett and Smith, 1968, 1972; MacKevett, 1976). A sample of the mineralization contained 2 parts per million (ppm) silver and 20,000 ppm copper.
|Geologic map unit||(-142.164841726942, 61.3485849936565)|
|Mineral deposit model||Vein|
|Age of mineralization||Permian or younger based on the age of the host rocks.|
|Alteration of deposit||Oxidation.|
|Workings or exploration||Limited surface sampling.|
|Indication of production||None|
Additional commentsThe locality is in the Wrangell-Saint Elias National Park and Preserve.
MacKevett, E.M., Jr., 1976, Mineral deposits and occurrences in the McCarthy quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-773-B, 2 sheets, scale 1:250,000.
MacKevett, E.M., Jr., and Smith, J.G., 1968, Distribution of gold, copper, and some other metals in the McCarthy B-4 and B-5 quadrangles, Alaska: U.S. Geological Survey Circular 604, 25 p.
|Reporters||Travis L. Hudson (Applied Geology, Inc.)|
|Last report date||1/12/2003|