|Quadrangle map, 1:250,000-scale||MH|
|Quadrangle map, 1:63,360-scale||A-5|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence, west of Fish Lake at an elevation of 4,100 feet, is about a half-mile west-northwest of VABM Wild. It is in the SE1/4SW1/4 section 29, T. 19 S., R. 9 E., Fairbanks Meridian. The occurrence corresponds to locality 70 in table 2 of Nokleberg and others (1991).|
Geologic descriptionThe rock at this occurrence is the Fish Lake mafic-ultramafic intrusive complex of Late Triassic age, which is believed to be a lopolithic feeder of the Nikolai basalt flows (Nokleberg and others, 1991). The occurrence consists of serpentinized olivine-pyroxene cumulate containing disseminated chromite. Grab sample 79ZN026A of this material contained more than 5,000 parts per million chromium (Nokleberg and others, 1992, table 2, locality 70).
|Geologic map unit||(-146.068655459173, 63.2349775467946)|
|Mineral deposit model||Chromite disseminated in 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 on 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||6/18/2001|