|Quadrangle map, 1:250,000-scale||DN|
|Quadrangle map, 1:63,360-scale||C-3|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The Eagles Nest prospect (Cobb, 1980 [OFR 80-363]) is at an elevation of about 2400 feet, on the northwest flank of Busia Mountain south of Eldorado Creek. It is in the SE1/4 SE1/4 section 22, T. 16 S., R. 18 W., Fairbanks Meridian. The location is accurate. The prospect is location 6 of Bundtzen, Smith, and Tosdal (1976), C of Hawley and Associates (1978), 19 of MacKevett and Holloway (1977), and 11 (Eagle's Den) of Thornsberry, McKee, and Salisbury (1984).|
The Eagles Nest quartz-stibnite vein strikes about N60W and dips 55 NE. It is partly covered, but two outcrops and intervening float suggest that the vein is at least 400 feet long; locally it is at least 20 feet thick. The country rock is quartz-feldspar-mica schist of the Birch Creek Schist (Bundtzen, 1981).At an elevation of about 2500 feet, the vein is at least 20 feet thick. It contains stibnite masses as much as a foot thick in a 3-foot-wide footwall zone of massive to brecciated quartz. The vein also crops out about 400 feet to the northeast, at an elevation of about 2300 feet. Selected, high-grade samples assayed as much as 44 percent antimony, up to 2.76 ounces of silver per ton, and 0.1-0.2 ppm of mercury (Hawley and Associates, 1978). The vein is similar to those at the Stampede (DN144) and Slate Creek mines (DN153).
|Geologic map unit||(, )|
|Mineral deposit model||Simple stibnite deposit (Cox and Singer, 1986; model 27d).|
|Mineral deposit model number||27d|
|Age of mineralization||The deposit is assumed to be Eocene (see record DN091).|
|Workings or exploration||The vein was discovered by Jim Fuksa sometime before 1976; it has been explored by shallow, hand-dug and blasted open cuts.|
|Indication of production||None|
Additional commentsThe prospect is in Denali National Park and Preserve.
Bundtzen, T.K., Smith, T.E., and Tosdal, R.M., 1976, Progress report--Geology and mineral deposits of the Kantishna Hills: Alaska Division of Geological and Geophysical Surveys Open-File Report AOF-98, 80 p., 2 sheets, scale 1:63,360.
Cobb, E.H., 1980, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Mount McKinley quadrangle, Alaska: U. S. Geological Survey Open-File Report 80-363, 150 p.
Cox, D.P., and Singer, D.A., eds., 1986, Mineral deposit models: U.S. Geological Survey Bulletin 1693, 379 p.
Hawley, C. C. and Associates, Inc, 1978, Mineral appraisal of lands adjacent to Mt. McKinley National Park, Alaska: U. S. Bureau of Mines Open-File Report 24-78, 275 p. (paged by sections).
MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous and selected non-metalliferous mineral deposits in the eastern part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-A, 99 p., 1 sheet, scale 1:1,000,000.
Thornsberry, V. V., McKee, C. J., and Salisbury, W. G., eds, 1984, 1983 Mineral Resource Studies: Kantishna Hills and Dunkle Mine Areas, Denali National Park and Preserve, Alaska: U. S. Bureau of Mines Open-File Report 129-84. 3 Volumes: v. 1, Text; v. 2, Appendices; v. 3, Maps. Prepared by Salisbury & Dietz, Inc., Spokane, WA.
|Last report date||4/20/2001|