|Quadrangle map, 1:250,000-scale||ID|
|Quadrangle map, 1:63,360-scale||D-2|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is at an elevation of about 1,350 feet on a knob that is about 0.8 mile northeast of hill 2340. It is about 0.2 mile south of the northeast corner of section 3, T. 33 N., R. 40 W., of the Seward Meridian. The location is accurate.|
Geologic descriptionThis occurrence consists of rubble of iron-oxide-stained breccia in hornfels that is probably related to the Cretaceous Beaver Mountains pluton. Manganese-oxide-stained rosettes of tourmaline in the hornfels may be related to a nearby, potassically-altered andesite-porphyry dike. The occurrence is about 2 miles north of the northern contact of the Beaver Mountains pluton (Miller and Bundtzen, 1994; Miller, Bundtzen, and Gray, 2005). Grab samples contain up to 55.0 parts per million (ppm) silver, 1,000 ppm zinc, 500 ppm copper, 100 ppm antimony, and 100 parts per billion (ppb) gold (Bundtzen and Laird, 1982).
|Geologic map unit||(-156.83040909087, 62.9830658530618)|
|Mineral deposit model||Polymetallic vein (Cox and Singer, 1986; model 22c).|
|Mineral deposit model number||22c|
|Age of mineralization||Probably related to the Beaver Mountains pluton which has been dated at 70.1 Ma (Bundtzen and Laird, 1982).|
|Alteration of deposit||Rocks altered to tourmaline greisen.|
|Workings or exploration||Limited surface sampling was conducted in 1979 (Bundtzen and Laird, 1982).|
|Indication of production||None|
Bundtzen, T.K., and Laird, G.M., 1982, Geologic map of the Iditarod D-2 and eastern D-3 quadrangles, Alaska: Alaska Division of Geological and Geophysical Surveys Geologic Report 72, 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.
|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||5/11/2003|