|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 4150 feet in a saddle on an unnamed ridge between Spruce Peak and Kankone Peak. It is on the divide between Caribou and Myrtle Creeks, in the NE1/4 NE1/4 section 21, T. 15 S., R. 16 W., Fairbanks Meridian. The location is accurate within 500 feet. The occurrence corresponds approximately to sample location 273 of Hawley and Associates (1978), and to occurrence 93 of Thornsberry, McKee, and Salisbury (1984).|
The country rock in the area of this occurrence is metafelsite of the lower Paleozoic Spruce Creek sequence (Bundtzen, 1981). The Spruce Creek rocks are in a downfaulted block about 3/4 mile wide that trends about NNE. The block is juxtaposed against Precambrian Birch Creek Schist (Bundtzen, 1981; Thornsberry, McKee, and Salisbury, 1984, fig. K-2).The occurrence consists of galena- and probably arsenopyrite-bearing quartz float, presumably from a thin, poorly-exposed, vein. A galena-rich sample assayed 0.93 ounce of gold per ton, 112.4 ounces of silver per ton, 33 percent lead, 2.65 percent arsenic, 0.12 percent copper, 0.265 percent zinc, and 0.435 percent antimony. Soil from a saddle near the vein is anomalous in lead, zinc, and silver (Hawley and Associates, 1978, sample number 273).
|Geologic map unit||(-150.653885748233, 63.6036011081278)|
|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||The vein was discovered in 1983 (Thornsberry, McKee, and Salisbury, 1984).|
|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.
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||5/4/2001|