|Quadrangle map, 1:250,000-scale||MH|
|Quadrangle map, 1:63,360-scale||B-5|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is approximately located at an elevation of 4,000 feet, on the north-facing slope of a hill one mile south of upper Eureka Creek, and at the center of section 21, T. 19 S., R. 8 E., Fairbanks Meridian. The occurrence corresponds to locality 45 in table 2 of Nokleberg and others (1991).|
Geologic descriptionThe occurrence is in the Fish Lake ultramafic complex, a lopolithic feeder of basaltic flows of the Nikolai Greenstone of Late Triassic age (Wrangellia terrane) (Nokleberg and others, 1991). The occurrence consists of chromite disseminated in serpentinized olivine-rich cumulate. Grab sample 79ZN031A contained more than 5,000 parts per million chromium (Nokleberg and others, 1991, table 2).
|Geologic map unit||(-146.223759212707, 63.2534754509897)|
|Mineral deposit model||Chromite disseminated in a layered mafic-ultramafic complex.|
|Age of mineralization||Late Triassic, the age of the host rock.|
|Alteration of deposit||Serpentinization.|
|Workings or exploration||The occurrence is covered by active Fort Knox Gold Resource claims.|
|Indication of production||None|
Nokleberg, W.J., Lange, I.M., Roback, R.C., Yeend, Warren, and Silva, S.R., 1991, Map showing locations of metalliferous lode and placer mineral occurrences, mineral deposits, prospects, and mines, Mount Hayes quadrangle, eastern Alaska Range, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1996-C, 42 p., 1 sheet, scale 1:250,000.
|Reporters||W.T. Ellis (Alaska Earth Science), C.C. Hawley (Hawley Resource Group), and W.J. Nokleberg (USGS)|
|Last report date||6/17/2001|