Age determination of thorianite in phlogopite-bearing spinel-garnet peridotite in the Gfohl Unit, Moldanubian Zone of the Bohemian Massif

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著者

    • NAEMURA Kosuke
    • Department of Geology and Mineralogy, Graduate school of Science, Kyoto University
    • HIRAJIMA Takao
    • Department of Geology and Mineralogy, Graduate school of Science, Kyoto University
    • SVOJTKA Martin
    • Institute of Geology, Academy of Sciences of the Czech Republic

抄録

Thorianite (ThO<sub>2</sub>) was found in the phlogopite-bearing spinel-garnet peridotite (Plešovice peridotite) occurring as decimeter-size lenticular body in the Gföhl granulite that forms the metamorphic core of the Variscan orogenic belt. Thorianite occurs as a member of multiphase solid inclusions, consisting of phlogopite + carbonates + apatite + graphite + rutile + monazite + thorianite, in chromian spinel. U-Th-Pb ages of the thorianite give a good concentration at 333.8 ± 4.5 Ma, which overlaps the U-Pb ages of zircon extracted from the host Gföhl granulite, probably reflecting the Variscan high-pressure high-temperature metamorphism during the continent-continent collision.

収録刊行物

  • Journal of mineralogical and petrological sciences  

    Journal of mineralogical and petrological sciences 103(4), 285-290, 2008-08-01 

    日本鉱物科学会

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各種コード

  • NII論文ID(NAID)
    10021370025
  • NII書誌ID(NCID)
    AA11460926
  • 本文言語コード
    ENG
  • 資料種別
    SHO
  • ISSN
    13456296
  • データ提供元
    CJP書誌  J-STAGE 
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