|Quadrangle map, 1:250,000-scale||MM|
|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 4050 feet on a northwest- trending ridge crest, about 1/2 mile northwest of Kankone Peak. The location is accurate within 500 feet. The occurrence corresponds to mineral deposit 281 of Hawley and Associates (1978), and occurrence 97 of Thornsberry, McKee, and Salisbury (1984).|
The country rocks at this occurrence are quartzite and mica-quartz schist of the Birch Creek Schist. The schistosity strikes NE and dips moderately SE (Bundtzen, 1981; Thornsberry, McKee, and Salisbury, 1984, fig. K-2).The occurrence is an iron-stained shear zone that trends about N. 55 E. and can be traced for about 1200 feet. The zone contains minor amounts of quartz; it is strongly oxidized and leached, but the former presence of pyrite is suggested by the limonite minerals goethite and jarosite. One sample contained 6800 ppm lead, and 6000 ppm zinc (Hawley and Associates, 1978, fig. 4.1-A(1), sample number 281), suggesting that small amounts of galena and sphalerite, or their oxidized equivalents, are present. The sample also contained 31 ppm silver. Thornsberry, McKee, and Salisbury (1984, v. 2) reported anomalous amounts of silver, lead, and zinc from weathered surface material at the site.
|Geologic map unit||(-150.616987887774, 63.6267024085362)|
|Age of mineralization||The deposit is assumed to be Eocene (see record MM091).|
|Alteration of deposit||Oxidation and leaching of sulfide(?)-bearing shear zone.|
|Workings or exploration||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.
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||2/5/2001|