|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 the ridge north of the glacier at the head of Toby Creek (MacKevett and Smith, 1972). It is at an elevation of about 8,000 feet near the northwest corner of section 10, T. 5 S., R. 18 E. of the Copper River Meridian. This is locality 63 of MacKevett (1976); the location is accurate to within about 100 feet.|
Geologic descriptionThis occurrence consists of a 1- to 3-meter-wide altered zone is at the contact between Permian or Triassic gabbro and Permian sedimentary rocks (MacKevett and Smith, 1972; MacKevett, 1976). A sample of the altered rocks contained 2 parts per million (ppm) silver and 20,000 ppm copper.
|Geologic map unit||(-142.178557133841, 61.4552900945215)|
|Age of mineralization||Permian or younger based on the age of the host rocks.|
|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|