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Unnamed (southwest flank of Camelback Mountain)

Occurrence, Inactive

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Commodities and mineralogy

Main commodities Ag; Cu
Other commodities Fe; Mn; Zn
Ore minerals chalcopyrite; pyrrhotite

Geographic location

Quadrangle map, 1:250,000-scale ID
Quadrangle map, 1:63,360-scale C-3
Latitude 62.54299
Longitude -157.35997
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is about 0.4 mile west of the top of Camelback Mountain at an elevation of about 2,000 feet. It is about 0.4 mile southwest of the center of section 1, T. 28 N., R. 44 W., of the Seward Meridian. The location is accurate.

Geologic setting

Geologic description

This occurrence is a vein of semi-massive pyrrhotite in hornfels adjacent to the Camelback Mountain intrusion. This olivine bearing monzonite intrusion has been dated at 73.2 Ma (Bundtzen and others, 1988; Miller and Bundtzen, 1994; Miller, Bundtzen, and Gray, 2005). Traces of chalcopyrite occur in the pyrrhotite. The orientation or length of the vein is uncertain. One grab sample of the pyrrhotite vein contained 2,600 parts per billion (ppb) silver, 891 parts per million (ppm) copper, 1.68 percent manganese, 304 ppm zinc, and 28.00 percent iron (Bundtzen, Laird, and Lockwood, 1988).
Geologic map unit (-157.36233951864, 62.5423059745301)
Mineral deposit model Polymetallic vein (Cox and Singer, 1986; model 22c).
Mineral deposit model number 22c
Age of mineralization Undated; the nearby Camelback Mountain intrusion is 73.2 Ma (Bundtzen and others, 1988).

Production and reserves

Workings or exploration Surface samples were collected by the Alaska Division of Geological and Geophysical Surveys in 1983 (Bundtzen, Laird, and Lockwood, 1988).
Indication of production None

References

References

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.
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