|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 Chitistone Mountain. It is at an elevation of about 6,500 feet, 2,000 feet west-southwest of elevation 6844 in the SW1/4 of section 27, T. 4 S., R. 16 E. of the Copper River Meridian. This is locality 86 of MacKevett (1976); the location is accurate to within about 1,000 feet.|
Geologic descriptionThis occurrence consists of a 30-foot-wide altered zone that contains calcite and barite that is localized along a thrust fault in Triassic limestone (MacKevett, 1976). A sample of the altered zone contained 2,000 parts per million (ppm) arsenic, 0.03 ppm gold, more than 5,000 ppm barium, 500 ppm nickel, and more than 20 percent iron (MacKevett and Smith, 1968).
|Geologic map unit||(-142.490971510476, 61.4888741967861)|
|Mineral deposit model||Barite vein or replacement|
|Age of mineralization||Triassic or younger based on the age of the host rocks.|
|Alteration of deposit||Calcite and barite replacement?|
|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.
|Reporters||Travis L. Hudson (Applied Geology, Inc.)|
|Last report date||1/12/2003|