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  • EARTH RESOURCES AND REMOTE SENSING  (1)
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    Rare accessory uraninite in a Sierran granite (1977)
    In:  Other Sources
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    Publication Date: 2011-08-17
    Description: One grain of uraninite was found in a single thin-section of Sierran granite. Electron and ion microprobe analysis were used to determine the composition. Since the U-Pb age calculated for the uraninite does not differ greatly from the K-Ar age of the unit in which it occurs, it is suggested that the mineral is primary and not reworked from a preexisting rock. No uraninite has been detected in heavy mineral concentrates from other rocks of the local area.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: American Mineralogist; 62; 1977
    Format: text
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