Age determination of thorianite in phlogopite-bearing spinel-garnet peridotite in the Gfohl Unit, Moldanubian Zone of the Bohemian Massif
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概要
- 論文の詳細を見る
Thorianite (ThO2) 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.
- 日本鉱物科学会の論文
- 2008-08-01
著者
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Svojtka Martin
Institute Of Geology Academy Of Sciences Of The Czech Republic V.v.i.
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Svojtka Martin
Institute Of Geology Academy Of Sciences Of The Czech Republic V.v.i
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Hirajima Takao
Department Of Geology And Mineralogy Graduate School Of Science Kyoto University
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Hirajima Takao
Department Of Geology And Mineralogy Division Of Earth And Planetary Sciences Graduate School Of Sci
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Naemura Kosuke
Department Of Geology And Mineralogy Graduate School Of Sciences Kyoto University
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Yokoyama Katsumi
Department Of Geology National Museum Of Nature And Science
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Hirajima Takao
Dep. Of Geology And Mineralogy Graduate School Of Sci. Kyoto Univ.
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