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Unnamed (east of Guggenheim Creek)

Occurrence, Inactive

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Commodities and mineralogy

Main commodities As; Mo
Other commodities Ag; Cr; Cu; Hg; Ni; Sb
Ore minerals unspecified sulfides
Gangue minerals carbonate minerals

Geographic location

Quadrangle map, 1:250,000-scale ID
Quadrangle map, 1:63,360-scale C-3
Latitude 62.60309
Longitude -157.3259
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is on a north-facing slope of an unnamed fork of Guggenheim Creek. The occurrence is about 4.2 miles north-northeast of the top of Camelback Mountain at an elevation of about 1,300 feet; it is about 0.3 mile west of the center of section 15, T. 29 N., R. 43 W., of the Seward Meridian. The location is accurate.

Geologic setting

Geologic description

This occurrence consists of a zone of unknown size that contains disseminated sulfides in an altered, iron-stained, mafic tuff at the base of the Beaver Mountains volcanic field (Bundtzen, Laird, and Lockwood, 1988; Miller and Bundtzen, 1994; Miller and Bundtzen, 1994, and Miller, Bundtzen, and Gray, 2005). One grab sample contained 100 parts per million (ppm) molybdenum, 500 ppm arsenic, 100 ppm copper, 1,100 parts per billion (ppb) mercury, 50 ppb silver, 30 ppm antimony, 1,000 ppm chromium, and 1,000 ppm nickel (McGimsey and others, 1988). The high values of chromium and nickel probably reflect background values of the mafic tuff. The other anomalous elements probably reflect epigenetic mineralization.
Geologic map unit (-157.328264861153, 62.6024092906808)
Alteration of deposit The mafic volcanic rocks have been altered to carbonate minerals and iron oxides.

Production and reserves

Workings or exploration The area was sampled by the U.S. Geological Survey in the 1980s (McGimsey and others, 1988).
Indication of production None

References

References

Bundtzen, T.K., and Miller, M.L., 1997, Precious metals associated with Late Cretaceous-early Tertiary igneous rocks of southwestern Alaska, in Goldfarb, R.J., and Miller, L.D., eds., Mineral Deposits of Alaska: Economic Geology Monograph 9, p. 242-286.
Bundtzen, T.K., Laird, G.M., and Lockwood, M.S., 1988, Geologic map of the Iditarod C-3 quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Professional Report 96, 13 p., 1 sheet, scale 1:63,360.
McGimsey, R.G., Miller, M.L., and Arbogast, B.F., 1988, Paper version of analytical results, and sample locality map for rock samples from the Iditarod quadrangle, Alaska: U.S. Geological Survey Open-File Report 88-421-A, 110 p., 1 sheet, scale 1:250,000.
Miller, M.L., and Bundtzen, T.K., 1994, Generalized geologic map of the Iditarod quadrangle, Alaska showing potassium-argon, major oxide, trace element, fossil, paleocurrent, and archeological sample localities: U.S. Geological Survey Miscellaneous Field Studies Map MF-2219-A, 48 pages; 1 sheet, scale 1:250,000.
Miller, M.L., Bundtzen, T.K., and Gray, J.E., 2005, Mineral resource assessment of the Iditarod quadrangle, west-central Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-2219-B, scale 1:250,000, pamphlet.
Reporters T.K. Bundtzen (Pacific Rim Geological Consulting, Inc.), M.L. Miller (U.S. Geological Survey); and C.C. Hawley (Hawley Resource Group)
Last report date 5/19/2003