|Quadrangle map, 1:250,000-scale||ID|
|Quadrangle map, 1:63,360-scale||C-3|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is at an elevation of about 2,400 feet, about 1.1 mile north of Camelback Mountain. It is about 0.1 mile southeast of the center of section 33, T. 29 N., R. 44 W., of the Seward Meridian. The location is accurate.|
Geologic descriptionThis occurrence is along a faulted contact between monzonite of the Camelback Mountain intrusion and sandstone and shale of the Upper Cretaceous, Kuskokwim Group (Miller and Bundtzen, 1994; Miller, Bundtzen and Gray, 2004). The olivine-biotite monzonite on Camelback Mountain has been dated at 73.2 Ma (Bundtzen, Laird, and Lockwood, 1988). The mineralized zone contains quartz, pyrite, a gray sulfosalt, possibly tennantite, and oxidation minerals after the sulfides. Grab samples contain up to 200 parts per billion (ppb) gold, 2,900 ppb silver, 210 parts per million (ppm) copper, 349 ppm zinc, 127 ppm arsenic, and 3,000 ppb mercury (Bundtzen, Laird, and Lockwood, 1988; McGimsey and others, 1988).
|Geologic map unit||(-157.349458442803, 62.5581368179919)|
|Mineral deposit model||Polymetallic vein (Cox and Singer, 1986; model 22c).|
|Mineral deposit model number||22c|
|Age of mineralization||Unknown; the Camelback Mountain intrusion is 73.2 Ma (Bundtzen, Laird, and Lockwood, 1988).|
|Alteration of deposit||None identified.|
|Workings or exploration||The occurrence was sampled by Alaska Division of Geological and Geophysical Surveys and the U.S. Geological Survey in the 1980s (Bundtzen, Laird, and Lockwood, 1988; McGimsey and others, 1988).|
|Indication of production||None|
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.
|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||5/19/2003|