|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||The Sulphide occurrence (Cobb, 1980 [OFR 80-363]) is in the canyon of Eureka Creek at an elevation of about 2100 feet. It is on a patented claim, in the SW1/4 SW1/4 section 7, T. 16 S., R. 17 W., Fairbanks Meridian. The location is accurate within 500 feet. The occurrence is number 22 of Hawley and Associates (1978), 33 of Bundtzen (1981), and 38 of Thornsberry, McKee, and Salisbury (1984).|
Geologic descriptionA quartz vein at the Sulphide claim cuts Birch Creek schist. Davis (1923) described an 8-foot-thick quartz vein in the discovery cut near the center of the claim that contains pyrite; panned samples of the vein contained gold. Bundtzen (1981) reported that the vein, which he traced for about 150 feet, contains arsenopyrite, boulangerite, and pyrite. The arsenopyrite is partly oxidized to scorodite. Hawley and Associates (1978, nos. 137-38, table 4.1-A(1)) collected rock samples near the prospect that assayed as much as 20 ppm silver and 1.9 ppm gold.
|Geologic map unit||(-150.933385540408, 63.5369940372599)|
|Mineral deposit model||Low-sulfide gold-quartz vein (Cox and Singer, 1986; model 36a).|
|Mineral deposit model number||36a|
|Age of mineralization||The deposit is assumed to be Eocene (see record MM091).|
|Alteration of deposit||Partial oxidation of arsenopyrite to scorodite.|
|Workings or exploration||Sloughed pits date at least as far back as 1922.|
|Indication of production||None|
Additional commentsThe prospect is in Denali National Park and Preserve; it has been inactive for many decades.
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.
Cobb, E.H., 1980, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Mount McKinley quadrangle, Alaska: U. S. Geological Survey Open-File Report 80-363, 150 p.
Cox, D.P., and Singer, D.A., eds., 1986, Mineral deposit models: U.S. Geological Survey Bulletin 1693, 379 p.
Davis, J. A., 1923, The Kantishna region, Alaska, in Stewart, B. D., Annual Report of the Mine Inspector to the Governor of Alaska, 1922: Alaska Division of Geological and Geophysical Surveys AR-1922.
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||4/23/2001|