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Unnamed (ridge between Ruby Gulch and the head of Rainy Creek)

Prospect, Inactive

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Commodities and mineralogy

Main commodities Au
Other commodities Ag; Pb; Sb
Ore minerals galena; pyrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale MM
Quadrangle map, 1:63,360-scale C-2
Latitude 63.5577
Longitude -150.8017
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 ridge between the heads of Ruby Gulch and Rainy Creek. It is in the north part of the SW1/4 NW1/4 section 2, T. 16 S., R. 17 W., Fairbanks Meridian. The location is accurate within 1000 feet. The prospect corresponds to location 50 of Bundtzen (1981), and occurrence 63 of Thornsberry, McKee, and Salisbury (1984).

Geologic setting

Geologic description

The country rocks in the area of this prospect are chiefly graphitic quartz schist and chloritic phyllite of the lower Paleozoic Spruce Creek sequence (Bundtzen, 1981; Thornsberry, McKee, and Salisbury, 1984, fig. K-2, v. 2, occurrence 63). The deposit consists of pyrite and a small amount of galena in a NE- trending, poorly exposed, quartz vein. Samples of the vein assay up to 0.01 ounce of gold per ton and 0.114 ounce of silver per ton. Lead and antimony are in the 100s of ppm range.
Geologic map unit (-150.803983934587, 63.5571970005014)
Mineral deposit model Weakly auriferous, low-sulfide 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 Silicification of graphitic quartz schist.

Production and reserves

Workings or exploration The vein was prospected by a single pit that may have been covered by subsequent road building (Thornsberry, McKee, and Salisbury, 1984, v. 2).
Indication of production None

Additional comments

The prospect is in Denali National Park and Preserve.

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.
Cox, D.P., and Singer, D.A., eds., 1986, Mineral deposit models: U.S. Geological Survey Bulletin 1693, 379 p.
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 1/16/2001