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Unnamed Occurrence (ARDF - ID068; southwest flank of Camelback Mountain), Iditarod District, Yukon-Koyukuk Borough, Alaska, USA

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Location: 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.
Geology: 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).
Workings: Surface samples were collected by the Alaska Division of Geological and Geophysical Surveys in 1983 (Bundtzen, Laird, and Lockwood, 1988).
Age: Undated; the nearby Camelback Mountain intrusion is 73.2 Ma (Bundtzen and others, 1988).

Commodities (Major) - Ag, Cu; (Minor) - Fe, Mn, Zn
Development Status: None
Deposit Model: Polymetallic vein (Cox and Singer, 1986; model 22c).

Mineral List



2 entries listed. 2 valid minerals.

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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.

Mineral and/or Locality  
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