Geochemistry of REY-rich mud in the Japanese Exclusive Economic Zone around Minamitorishima Island

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著者

    • Fujinaga Koichiro
    • Ocean Resources Research Center for Next Generation, Chiba Institute of Technology|Frontier Research Center for Energy and Resources, School of Engineering, The University of Tokyo
    • Maki Ryota
    • Department of Systems Innovation, School of Engineering, The University of Tokyo
    • Haraguchi Satoru
    • Department of Solid Earth Geochemistry, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
    • Nishio Yoshiro
    • Department of Marine Resource Sciences, Faculty of Agriculture and Marine Science, Kochi University
    • Usui Yoichi
    • Research and Development Center for Submarine Resources, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
    • Nozaki Tatsuo
    • Frontier Research Center for Energy and Resources, School of Engineering, The University of Tokyo|Research and Development Center for Submarine Resources, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)|Department of Planetology, Graduate School of Science, Kobe University
    • Yamazaki Toshitsugu
    • Department of Ocean Floor Geoscience, Atmosphere and Ocean Research Institute, The University of Tokyo|Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology
    • Ichiyama Yuji
    • Department of Earth Sciences, Faculty of Science, Chiba University
    • Ijiri Akira
    • Research and Development Center for Submarine Resources, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)|Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
    • Inagaki Fumio
    • Research and Development Center for Submarine Resources, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)|Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
    • Machiyama Hideaki
    • Research and Development Center for Submarine Resources, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
    • Yasukawa Kazutaka
    • Ocean Resources Research Center for Next Generation, Chiba Institute of Technology|Department of Systems Innovation, School of Engineering, The University of Tokyo
    • Iijima Koichi
    • Research and Development Center for Submarine Resources, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
    • Suzuki Katsuhiko
    • Research and Development Center for Submarine Resources, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
    • Kato Yasuhiro
    • Ocean Resources Research Center for Next Generation, Chiba Institute of Technology|Frontier Research Center for Energy and Resources, School of Engineering, The University of Tokyo|Department of Systems Innovation, School of Engineering, The University of Tokyo|Research and Development Center for Submarine Resources, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
    • Nakamura Kentaro
    • Department of Systems Innovation, School of Engineering, The University of Tokyo
    • Machida Shiki
    • Research and Development Center for Submarine Resources, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
    • Takaya Yutaro
    • Frontier Research Center for Energy and Resources, School of Engineering, The University of Tokyo|Research and Development Center for Submarine Resources, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)|Department of Resources and Environmental Engineering, School of Creative Science and Engineering, Waseda University
    • Ohta Junichiro
    • Department of Solid Earth Geochemistry, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
    • Araki Shuhei
    • Department of Systems Innovation, School of Engineering, The University of Tokyo
    • Liu Hanjie
    • Department of Systems Innovation, School of Engineering, The University of Tokyo
    • Usami Ryo
    • Department of Systems Innovation, School of Engineering, The University of Tokyo

抄録

<p>We report detailed lithological and chemical characteristics of deep-sea sediments, including rare-earth elements and yttrium-rich mud (REY-rich mud), in the Japanese Exclusive Economic Zone (EEZ) around Minamitorishima Island. Three research cruises obtained fourteen sediment cores collected by piston coring. Based on the visual descriptions and geochemical analysis of the sediment cores, we confirm the presence of REY-rich mud containing more than 400 ppm total REY (∑REY) in the southern and northwestern areas of the Minamitorishima EEZ. The REY-rich mud layers are characterized by abundant grains of phillipsite, biogenic calcium phosphate, and manganese oxides, and are widely distributed in relatively shallow depths beneath the seafloor. In contrast, relatively thick, non-REY-rich mud lies near the seafloor in the northern areas of the EEZ. In the three cores from the southern part of the EEZ, we also confirm the presence of highly/extremely REY-rich mud layers. Further accumulation of geochemical data from the sediments will be required to constrain the extent of the highly/extremely REY-rich mud layers.</p>

収録刊行物

  • GEOCHEMICAL JOURNAL

    GEOCHEMICAL JOURNAL 50(6), 575-590, 2016

    一般社団法人日本地球化学会

各種コード

  • NII論文ID(NAID)
    130005435148
  • 本文言語コード
    ENG
  • ISSN
    0016-7002
  • データ提供元
    J-STAGE 
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