|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 occurrence is at an elevation of about 4300 feet, about 2500 feet due north of Kankone Peak. It is in the SW1/4 NW1/4 section 11, T. 15 S., R. 16 W., Fairbanks Meridian. The location is accurate within 300 feet.The occurrence corresponds to number 62 of Bundtzen, Smith, and Tosdal (1976), 290 of Hawley and Associates (1978), and 69 of Bundtzen (1981). Its location is the same as occurrence 100 of Thornsberry, McKee, and Salisbury (1984), but their description of the geology does not agree with that of the earlier workers.
Geologic descriptionThe country rocks in the area of this occurrence are quartzite and mica-quartz schist of the upper Precambrian Birch Creek Schist. The schistosity strikes NE and dips SE (Bundtzen, 1981; Thornsberry, McKee, and Salisbury, 1984, fig. K-2). The occurrence consists of mineralized quartz veins in a shear zone. The shear zone is 15 to 30 feet wide; it trends NE, and can be traced more than 300 feet. The quartz contains pyrite, small amounts of galena, and, probably, sphalerite or an oxidized zinc mineral. Samples of the veins assay up to a half-ounce of silver per ton, 0.47 percent lead, 0.47 percent zinc, 300 ppm copper, 230 ppm antimony, and 44 ppm molybdenum. Gold was not detected. (Hawley and Associates, 1978; Bundtzen, 1981).
|Geologic map unit||(, )|
|Mineral deposit model||Weakly mineralized silicified shear zone.|
|Age of mineralization||The deposit is assumed to be Eocene (see record DN091).|
|Alteration of deposit||Silicification.|
|Workings or exploration||Exposures along the shear zone are mostly rubble crop. There are no workings.|
|Indication of production||None|
Additional commentsThe occurrence is in Denali National 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.
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||5/5/2001|