|Quadrangle map, 1:250,000-scale||MH|
|Quadrangle map, 1:63,360-scale||A-3|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is at an elevation of about 3,750 feet and south of the toe of the glacier at the head of West Fork Chistochina River, in the NE1/4 section 14, T. 20 S., R. 14 E., Fairbanks Meridian. It corresponds to locality 4 in figure 6 of Cobb (1979 [OFR 79-238]), which is the location of panned concentrate sample 41 of Rose (1967).|
Geologic descriptionThe occurrence is for floodplain gravels of the Chistochina River. A panned concentrate contained about 30 percent magnetite, 10 percent pyrite (which may include pyrrhotite and chalcopyrite), and 6 grains of scheelite (Rose, 1967). Two grains of scheelite were found in panned concentrates from two nearby sites.
|Geologic map unit||(-145.008321925614, 63.1861980977344)|
|Mineral deposit model||Black-sand placer; scheelite occurs in magnetite-rich placer concentrate.|
|Age of mineralization||Holocene.|
|Workings or exploration||No workings.|
|Indication of production||None|
Cobb, E.H., 1979, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Mount Hayes quadrangle, Alaska: U.S. Geological Survey Open-File Report 79-238, 140 p.
|Reporters||W.T. Ellis (Alaska Earth Sciences), C.C. Hawley (Hawley Resource Group), and W.J. Nokleberg (USGS)|
|Last report date||6/27/2003|