[J] Oral

M (Multidisciplinary and Interdisciplinary) » M-GI General Geosciences, Information Geosciences & Simulations

[M-GI34] Marine Manganese Minerals

Tue. May 28, 2019 3:30 PM - 5:00 PM A09 (TOKYO BAY MAKUHARI HALL)

convener:Akira Usui(Marine Core Research Center, Kochi University), Yoshio Takahashi(Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo), Katsuhiko Suzuki(Research and Development Center for Submarine Resources, Japan Agency for Marine-Earth Science and Technology), Takashi Ito(Faculty of Education, Ibaraki University), Chairperson:takashi ito(Ibaraki Univ.), Yoshio Takahashi(東京大学), Katsuhiko Suzuki(JAMSTEC)

Marine manganese deposits include nodules and crusts of massive iron-manganese oxide aggregates associated with useful metals. The deposits are known as potential resources of cobalt, copper, nickel, rare earth elements, platinum, and tellurium. However, the controlling parameters on the regional and temporal variations in chemical and mineralogical composition have not been clarified yet. In this session, various factors in the growth of manganese oxides, enrichment and circulation of metals, paleoenvironment, and formation age of manganese deposits will be discussed from viewpoints of geology, mineralogy, paleocean sciences, geochemistry, microbiology, and sea floor engineering.

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3:30 PM - 3:45 PM

[MGI34-01] Challenges in microstratigraphy on the hydrogenetic ferromanganese crusts: Depositional processes and environments recorded as secular variations in microstructure, chemical and mineralogical compositions.

*Akira Usui¹, Anna Nagaoka², Go-Ichiro Uramoto¹, Masafumi MURAYAMA³ (1.Marine Core Research Center, Kochi University, 2.Graduate School of Science, Kochi University, 3.Fac. Agriculture and Marine Sciences, Kochi University)

3:45 PM - 4:00 PM

[MGI34-02] Abundant ferromanganese microparticles in oxic pelagic sediments

*Go-Ichiro Uramoto^1,2, Yuki Morono², Naotaka Tomioka², Shigeyuki Wakaki², Ryoichi Nakada², Rota Wagai³, Kentaro Uesugi⁴, Akihisa Takeuchi⁴, Masato Hoshino⁴, Yoshio Suzuki^4,5, Satoshi Mitsunobu⁶, Fumito Shiraishi⁷, Hiroki Suga⁵, Yasuo Takeichi⁸, Yoshio Takahashi⁵, Fumio Inagaki² (1.Kochi University, 2.Japan Agency for Marine-Earth Science and Technology, 3.National Agriculture and Food Research Organization, 4.Japan Synchrotron Radiation Research Institute, 5.University of Tokyo, 6.Ehime University, 7.Hiroshima University, 8.High Energy Accelerator Research Organization)

4:00 PM - 4:15 PM

[MGI34-03] Fractionation of Zirconium-Hafnium in ferromanganese crusts

*Aya Sakaguchi¹, Junpei Inagaki¹, Minami Inoue², Akira Usui³, Hiromitsu Haba⁴, Masashi Kaneko⁵, Shinya Yamasaki¹, Keisuke Sueki¹, Yoshio Takahashi⁶ (1.Faculty of Pure and Applied Science, 2.Graduate School of Science, Hiroshima University, 3.Center for Advanced Marine Core Research , Kochi University, 4.Nishina Center, Riken, 5.Nuclear Science and Engineering Center, Japan Atomic Energy Agency, 6.Graduate School of Science, The University of Tokyo)

4:15 PM - 4:30 PM

[MGI34-04] Isotope fractionation of Mo-like elements during adsorption to ferromanganese oxides

*Masato Tanaka¹, Yoshio Takahashi¹ (1.Graduate School of Science, The University of Tokyo)

4:30 PM - 4:45 PM

[MGI34-05] Distinct distribution trends of arsenate and molybdate in marine ferromanganese nodules

*Shitong Yang¹, Soichiro Uesugi¹, Haibo Qin¹, Akira Usui², Yoshio Takahashi¹ (1.Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 2.Geology Department, Kochi University)

4:45 PM - 5:00 PM

[MGI34-06] Mineralogical and geochemical characteristics of ferromanganese nodules in the Minamitorishima EEZ

*Kentaro Nakamura¹, Koichi Horinouchi¹, Ryo Shimomura¹, Shiki Machida², Kazutaka Yasukawa^1,2, Koichiro Fujinaga^1,2, Yasuhiro Kato^1,2 (1.Department of Systems Innovation, School of Engineering, University of Tokyo, 2.ORCeNG, Chiba Institute of Technology)

Session information