Japan Geoscience Union Meeting 2015

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Oral

Symbol B (Biogeosciences) » B-PT Paleontology

[B-PT23] Decoding the history of Earth: From Hadean to Modern

Mon. May 25, 2015 4:15 PM - 6:00 PM 104 (1F)

Convener:*Tsuyoshi Komiya(Department of Earth Science & Astronomy Graduate School of Arts and Sciences The University of Tokyo), Yasuhiro Kato(Department of Systems Innovation, Graduate School of Engineering, University of Tokyo), Katsuhiko Suzuki(Institute for Research on Earth Evolution, Japan Agency for Marine-Earth Science and Technology), Chair:Koichiro Fujinaga(Frontier Research for Energy and Resources, School of Engineering, University of Tokyo), Yutaro Takaya(Research and Development (R&D) Center for Submarine Resources, Japan Agency for Marine-Earth Science and Technology)

4:15 PM - 4:30 PM

[BPT23-21] REY-rich mud within the Minamitorishima EEZ - A general overview of the latest research results -

*Yasuhiro KATO1, Koichiro FUJINAGA1, Kentaro NAKAMURA1, Kazutaka YASUKAWA1, Junichiro OHTA1, Yutaro TAKAYA2, Koichi IIJIMA2, Tatsuo NOZAKI2, Jun-ichi KIMURA2, Katsuhiko SUZUKI2, Hikaru IWAMORI2 (1.Univ. of Tokyo, 2.JAMSTEC)

In 2013, we confirmed the presence of rare-earth elements and yttrium (REY)-rich mud containing more than 6,000 ppm of total REY within the Japanese Exclusive Economic Zone (EEZ) surrounding Minamitorishima Island. Since the discovery of the “extremely REY-rich mud”, we have conducted a variety of approaches such as geochemical analyses, detailed microscopic observations, REY-leaching experiments, application of sub-bottom profiling to the exploration, and statistical analysis of the geochemical data set, towards the exploitation of the new and highly promising REY-resource in the near future. Here we report a general overview of the latest research results on REY-rich mud in the Minamitorishima EEZ.