Zircon U-Pb ages and whole–rock geochemistry from the Hida granites: implications for the geotectonic history and the origin of Mesozoic granites in the Hida belt

• YAMADA Raiki

  Graduate School of Science and Technology, Niigata University

• SAWADA Hikaru

  Institute for Extra–cutting–edge Science and Technology Avant–garde Research, Japan Agency of Marine–Earth Science and Technology (JAMSTEC)

• AOYAMA Shinnosuke

  Graduate School of Environment and Information Sciences, Yokohama National University

• OUCHI Wataru

  Suncoh Consultants Co., Ltd.

• NIKI Sota

  Geochemical Research Center, the University of Tokyo

• NAGATA Mitsuhiro

  Graduate School of Science and Engineering for Education, University of Toyama Present address: Tono Geoscience Center, Japan Atomic Energy Agency (JAEA)

• TAKAHASHI Toshiro

  Faculty of Science, Niigata University

• HIRATA Takafumi

  Geochemical Research Center, the University of Tokyo

書誌事項

タイトル別名

• Zircon U–Pb ages and whole–rock geochemistry from the Hida granites: implications for the geotectonic history and the origin of Mesozoic granites in the Hida belt, Japan

抄録

The Hida granites, classified into the pre–Jurassic and Jurassic plutons in this study, are important components of the Hida belt, which is a Paleozoic–Mesozoic basement of the Japan arc and underwent Permian to Triassic metamorphism during the collision between the North and South China blocks. This study performed zircon U–Pb dating and whole–rock geochemical analyses for the Hida granites from the major plutonic bodies to reveal the geotectonic history and the origin of the Hida belt. Obtained ²³⁸U–²⁰⁶Pb weighted mean ages exhibit 239.1–238.3 Ma for the Katakaigawa body (augen granite) and 200.5–180.9 Ma for the other bodies (non–deformed granitoids), and these ages can be correlated to the pre–Jurassic and Jurassic plutons, respectively. Geochronological results suggest that the mylonitization forming augen granites of the pre–Jurassic plutons occurred during its intrusion and indicate that the Jurassic plutons are distributed widely in the Japan Sea side of the Hida belt. Meanwhile, geochemical characteristics of whole–rock major and trace element compositions indicate that the pre–Jurassic and Jurassic plutons seem difficult to distinguished geochemically and suggest that both of them are adakitic and non–adakitic granites generated in subduction zone.

収録刊行物

• Journal of Mineralogical and Petrological Sciences

  Journal of Mineralogical and Petrological Sciences 116 (1), 61-66, 2021

  一般社団法人　日本鉱物科学会

キーワード

• Hida belt
• Hida granites
• Zircon U–Pb age
• Whole–rock geochemistry
• Adakite

詳細情報

• CRID: 1390005822568821504
• NII論文ID: 130007995354
• DOI: 10.2465/jmps.201125
• ISSN: 13493825
• ISSN: 13456296
• Web Site: https://www.jstage.jst.go.jp/article/jmps/116/1/116_201125/_pdf
• 本文言語コード: en
• データソース種別:
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