|Quadrangle map, 1:250,000-scale||MC|
|Quadrangle map, 1:63,360-scale||C-8|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This prospect is at the head of MacDougal Creek. It is at an elevation of about 4,950 feet, 2,500 feet north-northwest of elevation 5975, and 1,700 feet southeast of the center of section 2, T. 4 S. R. 9 E. of the Copper River Meridian. This is locality 106 of MacKevett (1976) and locality 37 of MacKevett and others, 1978). The location is accurate to within about 100 feet. This prospect was included by Cobb and MacKevett (1980) under the name 'Calcite'.|
Geologic descriptionThis prospect consists of a brecciated fault zone along the contact of altered Triassic limestone and granodiorite; the fault zone contains sparse amounts of pyrite, chalcopyrite, and malachite (Moffit and Mertie, 1923; Van Alstine and Black, 1946; MacKevett, 1976). The altered limestone is bleached and contains magnesite, dolomite, and seams of calcite. The fault zone also contains abundant serpentine minerals, and pods and veins of serpentine occur in the limestone (Van Alstine and Black, 1946; MacKevett, 1976).
|Geologic map unit||(-143.72508401705, 61.5445412003272)|
|Mineral deposit model||Vein|
|Alteration of deposit||Dolomitization(?); serpentine veining and replacement.|
|Workings or exploration||The deposit was explored by a short adit.|
|Indication of production||None|
Additional commentsThe locality is in the Wrangell-Saint Elias National Park and Preserve.
Cobb, E.H., and MacKevett, E.M., Jr., 1980, Summaries of data on and lists of references to metallic and selected nonmetallic mineral deposits in the McCarthy quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-885, 156 p.
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., Smith, J.G., Jones, D.L., and Winkler, G.R., 1978, Geologic map of the McCarthy C-8 quadrangle, Alaska: U.S. Geological Survey Geologic Quadrangle Map GQ-1418, 1 sheet, scale 1:63,360.
Moffit, F.H., and Mertie, J.B., Jr., 1923, The Kotsina-Kuskulana district, Alaska: U.S. Geological Survey Bulletin 745, 149 p.
|Reporters||Travis L. Hudson (Applied Geology, Inc.)|
|Last report date||1/12/2003|