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

• 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

• Yasukawa Kazutaka

  Ocean Resources Research Center for Next Generation, Chiba Institute of Technology Department of Systems Innovation, School of Engineering, The University of Tokyo

• 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

• 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)

• 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)

• KR13-02, MR13-E02 Leg 2 and KR14-02 Cruise Members

Abstract

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.

Journal

• GEOCHEMICAL JOURNAL

  GEOCHEMICAL JOURNAL 50 (6), 575-590, 2016-11-30

  GEOCHEMICAL SOCIETY OF JAPAN

Keywords

• REY-rich mud
• rare-earth elements
• geochemistry
• deep-sea mineral resources
• Minamitorishima Island

Details

• CRID: 1390001204553478272
• NII Article ID: 130005435148
• NII Article ID: 40021018396
• NII Book ID: AA00654975
• DOI: 10.2343/geochemj.2.0432
• DOI: 10.24517/00067020
• ISSN: 18805973
• ISSN: 00167002
• NDL BIB ID: 027766838
• Web Site: http://hdl.handle.net/2297/00067020
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I027766838
• Web Site: https://www.jstage.jst.go.jp/article/geochemj/50/6/50_2.0432/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • IRDB
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed