|Quadrangle map, 1:250,000-scale||MC|
|Quadrangle map, 1:63,360-scale||A-7|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is in the headwaters of an unnamed north tributary to the Klu River. It is at an elevation of about 5,400 feet, 1.7 miles northeast of triangulation station Verde (elevation 6233) and 6,500 feet northwest of elevation 5433. The site is in the SE 1/4 of section 22, T. 7 S., R. 11 E. of the Copper River Meridian. This is locality 42 of MacKevett (1976); the location is probably accurate to within 1,000 feet.|
Geologic descriptionThis occurrence consists of a serpentinized ultramafic body that is in fault contact with gabbro (MacKevett, 1976). A sample of the serpentinite contained greater than 10 percent magnesium, 100 parts per million (ppm) cobalt, 3,000 ppm chromium, and 2,000 ppm nickel. The mafic and ultramafic rocks are emplaced in Upper Paleozoic metamorphic rocks (MacKevett, 1978).
|Geologic map unit||(-143.411357500936, 61.241245975243)|
|Mineral deposit model||Podiform chromite? (Cox and Singer, 1986; model 8a)|
|Mineral deposit model number||8a?|
|Age of mineralization||Late Paleozoic or younger based on the age of the metamorphic country rocks.|
|Alteration of deposit||Serpentinization.|
|Workings or exploration||Only 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|