|Quadrangle map, 1:250,000-scale||ID|
|Quadrangle map, 1:63,360-scale||C-5|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is on hill 1012 at the head of an unnamed tributary of the Yetna River. The occurrence is in the SE1/4, section 3, T. 29 N., R. 49 W., of the Seward Meridian. The location is accurate.|
Geologic descriptionThis occurrence consists of iron-oxide-stained, altered rhyolite tuff in the Upper Cretaceous to early Tertiary, Yetna River volcanic field (Miller and Bundtzen, 1994; Miller, Bundtzen, and Gray, 2005). One grab sample contained 5.0 parts per million (ppm) silver and 200 ppm lead (McGimsey and others, 1988).
|Geologic map unit||(-158.435214559543, 62.6304263553003)|
|Age of mineralization||Unknown; the Yetna River volcanic field is Late Cretaceous to Tertiary (58-68 Ma) in age (Miller and Bundtzen (1994).|
|Alteration of deposit||Chalcedonic alteration.|
|Workings or exploration||Surface samples were collected by the U.S. Geological Survey in 1985 (McGimsey and others, 1988).|
|Indication of production||None|
Additional commentsLocality equivalent to number 69 of Miller, Bundtzen, and Gray (2005), Table 1.
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.
|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||6/28/2006|