|Quadrangle map, 1:250,000-scale||DN|
|Quadrangle map, 1:63,360-scale||C-2|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This prospect is on the ridge between Last Chance and Crevice Creeks at an elevation of about 3800 feet. It is about 0.25 mile north of the center of section 25, T. 15 S., R. 16 W., Fairbanks Meridian. The location is accurate within 300 feet. The prospect corresponds to number 51 of Bundtzen, Smith, and Tosdal (1976), 228 of Hawley and Associates (1978), 64 of Bundtzen (1981), and 72 of Thornsberry, McKee,and Salisbury (1984, v. 2).|
Geologic descriptionThe country rocks in the area of this prospect are quartz-mica schist and quartzite of the upper Paleozoic Birch Creek Schist (Bundtzen, 1981); float at the prospect site is mainly quartz-feldspar schist. The schist generally strikes NNE and dips moderately to the NW (Thornsberry, McKee, and Salisbury, 1984, fig. K-2). The deposit is a 30-foot-thick, quartz-rich vein that trends about N50E. The quartz contains pyrite and features boxwork limonite, possibly after another sulfide. Samples of the vein assayed up to 400 ppm copper, 0.01 ounce of gold per ton, 30 ppm molybdenum, and 12 ppm uranium (Bundtzen, 1981).
|Geologic map unit||(, )|
|Mineral deposit model||Low-sulfide gold?-quartz vein (Cox and Singer, 1986; model 36a?).|
|Mineral deposit model number||36a?|
|Age of mineralization||The deposit is assumed to be Eocene (see record DN091).|
|Workings or exploration||One shallow pit.|
|Indication of production||None|
Additional commentsThe prospect is in Denali National Park and Preserve. A possible extension of this vein on the west side of Moose Creek was uncovered during ground sluicing, but the cut had sloughed by 1921 (Davis, 1923, p. 123).
Bundtzen, T.K., 1981, Geology and mineral deposits of the Kantishna Hills, Mt. McKinley quadrangle, Alaska: M. S. Thesis, University of Alaska, College, Alaska, 238 p.
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.
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).
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||5/2/2001|