|Quadrangle map, 1:250,000-scale||MM|
|Quadrangle map, 1:63,360-scale||C-1|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is at an elevation of about 2750 feet at the head of an unnamed south fork of Stampede Creek. It is approximately at the midpoint of the boundary between sections 1 and 2, T. 14 S., R. 15 W., Fairbanks Meridian. The occurrence corresponds to number 65a of Bundtzen, Smith, and Tosdal (1976), and 108 of Thornsberry, McKee, and Salisbury (1984).|
The country rocks in the area of this occurrence are quartz-feldspar schist and gneiss of the upper Precambrian Birch Creek Schist, and graphitic quartzite either of the Birch Creek Schist or of the lower Paleozoic Keevy Peak Formation. The rocks appear to be cut by NE-striking faults subsidiary to the Stampede fault (Thornsberry, McKee, and Salisbury, 1984, pl. K-4; Hawley and Associates, 1978, fig. 4-1-A(2)).The occurrence consists of a foot-thick quartz vein that contains disseminated chalcopyrite and pyrite, and is stained by malachite (Bundtzen, Smith, and Tosdal (1976, occurrence 65a). Hawley and Associates (1978; fig. 4.1-A(2), samples 128-131) collected soil samples on the ridge above the occurrence that contained up to 3.8 ppm silver, 10 ppm molybdenum, 46 ppm antimony, and 255 ppm zinc.
|Geologic map unit||(-150.389396942486, 63.7301094953493)|
|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).|
|Alteration of deposit||Oxidation of copper mineral.|
|Workings or exploration||The vein was discovered and described by Bundtzen, Smith, and Tosdal (1976). Later investigators mapped and collected soil samples in the area (Hawley and Associates, 1978).|
|Indication of production||None|
Additional commentsThe occurrence 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.
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||5/6/2001|