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Unnamed Occurrence (ARDF - ID077; southwest of St. Patricks Creek), Iditarod District, Yukon-Koyukuk Borough, Alaska, USA

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Location: This occurrence is about 2.0 miles southeast of the mouth of St. Patrick Creek and 0.7 mile southwest of hill 1655. It is at an elevation of about 1,550 feet, about 0.5 mile northwest of the center of section 36, T. 30 N., R. 43 W., of the Seward Meridian. The location is accurate.
Geology: This occurrence is in an iron-stained chert breccia, possibly in a fault sliver of the Innoko Terrane (Miller and Bundtzen, 1994; Miller, Bundtzen, and Gray, 2005). The northeast-trending shear zone in the chert contains minor pyrite. No other information is available. One grab sample contained 200 parts per billion (ppb) gold, 200 ppb silver, and 2,500 ppb mercury (Bundtzen, Laird, and Lockwood, 1988).
Workings: The Alaska Division of Geological and Geophysical surveys sampled this occurrence in 1983 (Bundtzen, Laird, and Lockwood, 1988).
Alteration: Iron staining.

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

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., 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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