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Frank Long

Prospect, Inactive

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Commodities and mineralogy

Main commodities Ag; Au
Ore minerals arsenopyrite; gold
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale SV
Quadrangle map, 1:63,360-scale C-2
Latitude 59.51
Longitude -150.61
Nearby scientific data Find additional scientific data near this location
Location and accuracy Pilgrim (1933) located this prospect directly across from Beautiful Island just above the high tide line in the West Arm of Nuka Bay, and 1.5 miles south of the entrance of Beauty Bay. Richter (1970) could not find any signs of this prospect and its location is uncertain.

Geologic setting

Geologic description

The quartz vein at this prospect is hosted in Cretaceous Valdez Group graywacke (Richter, 1970). The vein varies from six to 24 inches in width; it strikes S45E and dips nearly vertical. The vein consists of white quartz and arsenopyrite with considerable graywacke fragments. The vein was drifted along strike for 88 feet. A sample of quartz and arsenopyrite taken from the ore stockpile assayed 0.38 ounces of gold and 0.30 ounces of silver per ton (Pilgrim, 1933).
Geologic map unit (-150.612093699437, 59.5094152709599)
Mineral deposit model Low-sulfide, Au-quartz vein (Cox and Singer, 1986; model 36a)
Mineral deposit model number 36a
Age of mineralization Tertiary; Boden and others (1991) report other veins in the district are about 55 m.y. old.
Alteration of deposit None reported, although Borden and others (1991) report other veins in the Nuka Bay district show carbonization, sulfidization, sericitization, and silicification of the wall rock adjacent to the veins.

Production and reserves

Workings or exploration The vein was drifted along strike for 88 feet. A sample of quartz and arsenopyrite taken from the ore stockpile assayed 0.38 ounces of gold and 0.30 ounces of silver per ton (Pilgrim, 1933).
Indication of production Undetermined
Production notes None reported.

Additional comments

This property is often combined with the Skinner property. The site is difficult to locate.

References

MRDS Number A010572

References

Borden, J.C., Goldfarb, R.J., Gent, C.A., Burruss, R.C., and Roushey, B.H., 1992 Geochemistry of lode-gold deposits, Nuka Bay district, southern Kenai Peninsula, in Bradley, D.C., and Dusel-Bacon, Cynthia, eds, Geologic studies in Alaska by the U.S. Geological Survey, 1991: U.S. Geological Survey Bulletin 2041, p. 13-21.
Cobb, E.H., 1979, Summary of references to mineral occurrences (other than minerals fuels and construction materials) in the Seldovia quadrangle, Alaska: U.S. Geological Survey Open-file Report 80-87, 47 p.
MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous and selected non-metalliferous mineral deposits in the eastern part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-A, 99 p., 1 sheet, scale 1:1,000,000.
Pilgrim, E.R., 1933, Nuka Bay district, in Stewart, B. D., Making mining investigations and mine inspection in Alaska, biennium ending March 31, 1933: Alaska Territorial Department of Mines Annual Report 1933B, p. 26-51.
Richter, D.H., 1970, Geology and lode-gold deposits of the Nuka Bay area, Kenai Peninsula, Alaska: U.S. Geological Survey Professional Paper 625-B, p. Bl-B16.
Smith, P.S., 1938, Mineral industry of Alaska in 1936: U.S. Geological Survey Bulletin 897-A, p. 1-107.
Reporters Jeff A. Huber (Anchorage)
Last report date 3/7/1999