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Unnamed Occurrence (ARDF - ID067; head of Montana Creek), Iditarod District, Yukon-Koyukuk Borough, Alaska, USA

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Location: This occurrence is at an elevation of about 2,100 feet, about 1.5 mile north-northwest of Camelback Mountain. It is about 0.3 mile east-northeast of the center of section 32, T. 29 N., R. 44 W., of the Seward Meridian. The location is accurate.
Geology: This occurrence is an altered zone in sandstone and shale of the Upper Cretaceous Kuskokwim Group adjacent to a mafic dike that has been altered to silica and carbonate minerals (Bundtzen, Laird, and Lockwood, 1988; Miller and Bundtzen, 1994; Bundtzen and Miller, 1997). One sample of altered mafic dike contained 2,900 parts per billion mercury (McGimsey and others, 1988; Miller, Bundtzen, and Gray, 2005).
Workings: The site was sampled by the Alaska Division of Geological and Geophysical Surveys in 1983 (McGimsey and others, 1988; Miller, Bundtzen, and Gray, 2005).
Alteration: Silica-carbonate alteration of dike.

Commodities (Major) - Hg
Development Status: None

Mineral List



1 entry listed. 1 valid mineral.

The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

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.

Mineral and/or Locality  
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