岐阜県美濃テレーン上麻生ユニットの礫岩に含まれるチャート岩体から産出したペルム紀放散虫化石  [in Japanese] Middle and Late Permian radiolarians from chert blocks within conglomerates of the Kamiaso Unit of the Mino terrane in Gifu Prefecture, central Japan  [in Japanese]

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Author(s)

    • 伊藤 剛 Ito Tsuyoshi
    • 中国科学院南京地質古生物研究所|現所属:産業技術総合研究所地質調査総合センター Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences|Present address: Institute of Geology and Geoinformation, Geological Survey of Japan, AIST
    • 北川 祐介 Kitagawa Yusuke
    • 新潟大学大学院自然科学研究科|現所属:三菱マテリアルテクノ株式会社 Graduate School of Science and Technology, Niigata University|Present address: Mitsubishi Material Techno Co.

Abstract

Middle and Late Permian (Capitanian and Changhsingian) radiolarians were obtained from chert blocks located within conglomerates of the Kamiaso Unit of the Mino terrane along Tsubogawa River, Gifu Prefecture, Central Japan. Previously, the Capitanian and Changhsingian cherts have not been reported from the sequences of the Akiyoshi terrane. Therefore, the collected chert blocks were not derived from the Akiyoshi terrane. The Capitanian and Changhsingian cherts have been recovered from the Permian sequences of Jurassic accretionary complexes in Southwest Japan; however, the characteristics of the Permian radiolarian fauna of the chert blocks are inconsistent with those from previously recovered Permian cherts. This indicates that the chert blocks were not derived from previously known units including Permian sequences. A previous study suggested that Triassic-Jurassic chert clasts within the chert breccias of the Kamiaso Unit were derived from the accreted Kamiaso Unit on the landward trench slope. As the Permian chert has not been identified in the coherent facies of the Kamiaso Unit, the Permian sequences must have been subducted during accretion. Our results suggest that the chert blocks were derived from the pre-accretion Kamiaso Unit located on the outer trench slope.

Journal

  • The Journal of the Geological Society of Japan

    The Journal of the Geological Society of Japan 122(6), 249-259, 2016

    The Geological Society of Japan

Codes

  • NII Article ID (NAID)
    130005253514
  • NII NACSIS-CAT ID (NCID)
    AN00141768
  • Text Lang
    JPN
  • ISSN
    0016-7630
  • NDL Article ID
    027544804
  • NDL Call No.
    Z15-174
  • Data Source
    NDL  J-STAGE 
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