Unnamed Occurrence (ARDF - ID001; south tributary of Dishna River), Innoko District, Yukon-Koyukuk Borough, Alaska, USA
Location: This placer occurrence is at an elevation of about 600 feet in an unnamed, northeast-flowing tributary of the Dishna River. The occurrence is about 0.5 mile south-southeast of the center of section 17, T. 32 N., R. 44 W., of the Seward Meridian. The location is accurate.
Geology: The rocks in the vicinity of this placer occurrence are shale and sandstone of the Upper Cretaceous, Kuskokwim Group near a fault contact with Jurassic ophiolite (Miller and Bundtzen, 1994; Miller, Bundtzen and Gray, 2005). A panned concentrate of alluvial sediments collected at the site contained several grains of gold and 20 to 50 percent cinnabar (Bennett and others, 1988). The lode source of the gold and cinnabar is unknown.
Workings: Surface sampling by the U.S. Geological Survey in 1985 (Bennett and others, 1988).
Age: Probably Quaternary.
Commodities (Major) - Au; (Minor) - Hg
Development Status: None
Deposit Model: Placer Au-cinnabar deposit (Cox and Singer, 1986; model 39a).
ReferencesBennett, G.J., Gray, J.E., and Taylor, C.D., 1988, Mineralogy and sample locality map of the nonmagnetic, heavy-mineral-concentrate samples, Iditarod quadrangle, Alaska: U.S. Geological Survey Open-File Report 88-32, 37 p., 1 plate, 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.
| Cinnabar|| Gold|
2 entries listed. 2 valid minerals.
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.
This page is currently not sponsored. To sponsor this page click here.
|Fade toolbar when not in focus||Fix toolbar to bottom of page|
|Hide Social Media Links|
|Slideshow frame delay||seconds|
Locality Updated: Blackwood opencut, MMM Mine, Broken Hill, Yancowinna Co., New South Wales, AustraliaFrom Keith Compton, 20th Dec 2014 07:10:15