|Quadrangle map, 1:250,000-scale||MM|
|Quadrangle map, 1:63,360-scale||C-3|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This prospect is at an elevation of about 3100 feet on the north flank of the ridge between Brooker Mountain and Alpha Ridge in the Kantishna Hills. It is about 500 feet north of the center of section 21, T. 16 S., R. 18 W., Fairbanks Meridian. The prospect is number 3 of Bundtzen, Smith and Tosdal (1978), Bundtzen (1981), and Thornsberry, McKee, and Salisbury (1984). The descriptions in the two Bundtzen references, however, do not appear to match the prospect. Number 20 of Hawley and Associates (1978) is a minor occurrence about 0.2 mile south of the prospect.|
Geologic descriptionThe country rocks in the area of the prospect are felsitic and quartzitic facies of the Birch Creek Schist (Bundtzen, 1981). The prospect consists of fragments of vein material in sloughed trenches. No veins are exposed in the trenches, which trend about N 40 E, possibly the strike of the vein. The fragments consist of galena, stibnite, and possibly minor pyrargyrite in a quartz-ankerite-tourmaline gangue. T.K. Hinderman collected two samples at the site: one of them assayed 275 ppm silver, 1.1 ppm gold, 0.245 percent arsenic, 0.905 percent zinc, 9.15 percent antimony and 10.5 percent lead (Thornsberry, McKee, and Salisbury, 1984, v. 2, occurrence 3). Hawley and Associates (1978) reported a quartz-pyrite vein about 0.2 mile south of the prospect.
|Geologic map unit||(-151.048585944275, 63.5154907748134)|
|Mineral deposit model||Polymetallic vein (Cox and Singer, 1986; model 22c).|
|Mineral deposit model number||22c|
|Age of mineralization||The deposit is assumed to be Eocene (see record MM091).|
|Workings or exploration||Two shallow trenches were sloughed by 1983.|
|Indication of production||None|
Additional commentsThe prospect is in Denali Park and Preserve.
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||2/11/2000|