Discovery of extremely REY-rich mud in the western North Pacific Ocean

Koichi Iijima, Kazutaka Yasukawa, Koichiro Fujinaga, Kentaro Nakamura, Shiki Machida, Yutaro Takaya, Junichiro Ohta, Satoru Haraguchi, Yoshiro Nishio, Yoichi Usui, Tatsuo Nozaki, Toshitsugu Yamazaki, Yuji Ichiyama, Akira Ijiri, Fumio Inagaki, Hideaki Machiyama, Katsuhiko Suzuki, Yasuhiro Kato*

*この研究の対応する著者

研究成果: Article査読

44 被引用数 (Scopus)

抄録

We have discovered deep-sea mud that is extremely enriched in rare-earth elements and yttrium (together called REY) in the Japanese Exclusive Economic Zone around Minamitorishima Island, in the western North Pacific Ocean. The maximum total REY concentration reaches approximately 7000 ppm, which is much higher than that reported for conventional REY deposits on land and other known potential REY resources in the ocean. The extremely REY-rich mud is characterized by abundant phillipsite and biogenic calcium phosphate. In addition, the stratigraphic layer with the highest REY concentration occurs just -3 m beneath the seafloor. The shallow burial of these strata together with the high REY content, especially those of heavy rare-earth elements, suggest that the newly discovered extremely REY-rich mud may be a promising REY resource.

本文言語English
ページ(範囲)557-573
ページ数17
ジャーナルGEOCHEMICAL JOURNAL
50
6
DOI
出版ステータスPublished - 2016

ASJC Scopus subject areas

  • 地球物理学
  • 地球化学および岩石学

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