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Unnamed (southwest flank of Wickersham Dome)

Prospect, Inactive

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Commodities and mineralogy

Main commodities Ag
Other commodities As; Mo; Pb
Ore minerals arsenopyrite; limonite; pyrite
Gangue minerals quartz; siderite

Geographic location

Quadrangle map, 1:250,000-scale MM
Quadrangle map, 1:63,360-scale C-2
Latitude 63.5495
Longitude -150.9336
Nearby scientific data Find additional scientific data near this location
Location and accuracy This prospect is at an elevation of about 3400 feet on the southwest flank of Wickersham Dome, a short distance northeast of the north end of Quigley Ridge. It is in the SW1/4 SW1/4 section 6, T. 16 S., R. 17 W., Fairbanks Meridian. The location is accurate within 300 feet. The prospect corresponds to number 38 of Bundtzen (1981) and number 82 of Hawley and Associates (1978). It is number 42 of Thornsberry, McKee, and Salisbury (1984), although numbers 43 and 42 appear to be interchanged on their map (fig. K-8).

Geologic setting

Geologic description

The country rock at this prospect is mainly feldspathic quartz schist of the Birch Creek Schist. The schist is cut by lower Tertiary basaltic dikes (Bundtzen, 1981; Thornsberry, McKee, and Salisbury, 1984). The deposit consists of a sulfide-bearing quartz-siderite vein that cuts the basalt, and of disseminated pyrite and arsenopyrite in argillic(?)-altered basalt.
The vein is sparsely mineralized. The highest silver content in four samples was 0.22 ounce per ton; lead content was as much as 0.17 percent, arsenic averaged about 300 ppm, and one sample contained 35 ppm molybdenum (Bundtzen, 1981, p. 219).
The vein is Tertiary; it cuts mafic dikes which have been dated as Eocene (Bundtzen and Turner, 1979).
Geologic map unit (-150.935887050064, 63.5489940255217)
Mineral deposit model Low-sulfide quartz-carbonate vein.
Age of mineralization The vein is Tertiary; it cuts mafic dikes which have been dated as Eocene (Bundtzen and Turner, 1979).
Alteration of deposit Sulfidization and argillic(?) alteration of basalt. Iron-oxide alteration.

Production and reserves

Workings or exploration The prospect was explored by several pits of unknown date.
Indication of production None

Additional comments

The prospect is in Denali National Park and Preserve and is inactive.

References

References

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., and Turner, D.L., 1979, Geochronology of metamorphic and igneous rocks in the Kantishna Hills, Mount McKinley quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Geologic Report 61, p. 25-30.
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.
Reporters C.C. Hawley
Last report date 4/29/2001