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Friday Rim

Prospect, Inactive

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Commodities and mineralogy

Main commodities Ag
Other commodities Pb; Zn
Ore minerals pyrite
Gangue minerals quartz; siderite

Geographic location

Quadrangle map, 1:250,000-scale DN
Quadrangle map, 1:63,360-scale C-2
Latitude 63.5516
Longitude -150.9769
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Friday Rim prospect is at an elevation of about 3050 feet on the south flank of the ridge north of Friday Creek . It is in the SE1/4 SE1/4 section 2, T. 16 S., R. 18 W., Fairbanks Meridian. The location is accurate within 500 feet. The prospect corresponds to number 19 of Bundtzen, Smith, and Tosdal (1976) and 30 of Thornsberry, McKee, and Salisbury (1984).

Geologic setting

Geologic description

The Friday Rim prospect area is underlain by quartz-rich Birch Creek schist that dips to the northwest (Hawley and Associates, 1978, fig. 4.1-1(A); Thornsberry, McKee, and Salisbury, 1984, fig. K-2, v. 2). The Birch Creek schist is probably late Precambrian (Bundtzen, 1981). At the prospect, a pit exposes a quartz-siderite vein that contains a little pyrite. Samples of the vein assayed up to 0.05 ounce of gold per ton and small amounts of lead and zinc (Bundtzen, 1981). Near the pit, Hawley and Associates (1978, fig. 4.1-1(A) ) sampled reddish soil (no. 82) that contained slightly anomalous amounts of silver, lead, and zinc. Soil (no. 81) collected a few hundred feet away contained 2.8 ppm silver, 505 ppm lead, and 315 ppm zinc.
Geologic map unit (, )
Mineral deposit model Low-sulfide quartz-siderite vein.
Age of mineralization The deposit is assumed to be Eocene (see record DN091).

Production and reserves

Workings or exploration The vein was explored by a 4 foot by 4 foot by 4 foot pit of unknown date.
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.
Bundtzen, T.K., Smith, T.E., and Tosdal, R.M., 1976, Progress report--Geology and mineral deposits of the Kantishna Hills: Alaska Division of Geological and Geophysical Surveys Open-File Report AOF-98, 80 p., 2 sheets, scale 1:63,360.
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 2/9/2001