|Quadrangle map, 1:250,000-scale||HU|
|Quadrangle map, 1:63,360-scale||D-2|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is north of the Helpmejack Hills, about 10 miles west-northwest of Helpmejack Lakes and about 18 miles northeast of Norutak Lake. It is at an elevation of about 3,400 feet in the SW 1/4 of section 32, T. 19 N., R. 23 E., of the Kateel River Meridian. The location is accurate within 1 mile.|
Geologic descriptionRhodochrosite, manganite, and pyrolusite occur in Devonian(?) altered mafic volcanic rocks and phyllite (Patton and Miller, 1966). Field investigators in the 1990s were not able to locate the occurrence (Kurtak and others, 2002). No other information is available.
|Geologic map unit||(-153.885628838766, 66.9975011408831)|
|Mineral deposit model||Volcanogenic Mn? (Cox and Singer, 1986; model 24c?).|
|Mineral deposit model number||24c?|
|Indication of production||None|
Bottge, R.G., 1988, Maps summarizing land availability for mineral exploration and development in western Alaska, 1986: U.S. Bureau of Mines Open-File Report 14-88, 38 quadrangle overlays.
Foley, J.Y., Barker, J.C., and Brown, L.L., 1985, Critical and strategic minerals investigation in Alaska - chromium: U.S. Bureau of Mines Open-File Report 97-85, 54 p., 1 sheet.
Kurtak, J.M., Klieforth, R.F., Clark, J.M., and Maclean, E.A., 2002, Mineral investigations in the Koyukuk mining district, northern Alaska: Final Report: U.S. Bureau of Land Management Technical Report 50, v. 1 and 2, 845 p.
|Reporters||J.M. Britton (Anchorage)|
|Last report date||8/1/2002|