|Quadrangle map, 1:250,000-scale||ID|
|Quadrangle map, 1:63,360-scale||A-6|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is on a ridge about 0.4 mile north of Return Creek, a tributary of Montana Creek. The occurrence is at an elevation of about 950 feet; it is about 0.2 mile east-northeast of hill 904 and 0.3 mile southeast of the center of section 30, T. 23 N., R. 50 W., of the Seward Meridian. The location is approximate.|
Geologic descriptionThis occurrence consists of quartz-carbonate veins in reddish-orange, iron- oxide-stained volcanic flows and tuffs of the Iditarod volcanics (Miller and Bundtzen, 1988). Locally the volcanic rocks are cut by thin altered felsic dikes (Miller and Bundtzen, 1994; Miller, Bundtzen, and Gray, 2005). As seen in rubble crop, the individual quartz-carbonate veins are up to 4 inches thick. There are shallow prospect pits adjacent to the quartz-carbonate veins. A grab sample of the vein material contained 930 parts per billion (ppb) mercury, 110 parts per million (ppm) arsenic, and 10 ppm antimony (McGimsey and others, 1988).
|Geologic map unit||(-158.508807061114, 62.0507455685614)|
|Mineral deposit model||Quartz-carbonate veins.|
|Alteration of deposit||Iron oxide alteration of volcanic rocks.|
|Workings or exploration||Samples were collected by the U.S. Geological Survey and Alaska Division of Geological and Geophysical Surveys in the 1980s (McGimsey and others, 1988).|
|Indication of production||None|
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., 1988, Right lateral offset solution for the Iditarod-Nixon Fork fault, western Alaska: U.S. Geological Survey Circular 1016, p. 99-103.
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||5/25/2003|