[M-ZZ44] Marine Manganese Minerals: Depositional environments, exploration, and development

Thu. May 29, 2025 9:00 AM - 10:30 AM 201B (International Conference Hall, Makuhari Messe)

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

Marine manganese deposits forming nodules, crusts, and massive aggregates are known as potential resources for strategic metals as well as geological archives of surface environments. However, the controlling parameters of variations in chemical and mineralogical compositions on regional and temporal scales have not been well understood yet. In this session, various factors in growth processes, enrichment and circulation of metals, paleoenvironment, formation age are discussed with the results of exploration and environmental impact studies from viewpoints of geosciences and engineering.

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9:00 AM - 9:15 AM

[MZZ44-01] Submicron-scale petrography of hydrogenetic ferromanganese crusts for growth processes and environments

*Akira Usui¹, Hiroshi Kawabata², Teruhiko Kashiwabara³, Tomoyo Okumura¹, Makoto Miyajima⁴ (1.Marine Core Research Institute, Kochi University, 2.Fac. Science and Engineering, Kochi Univ., 3.Japan Marine and Earth Science and Technology Center, 4.Fac. Agriculture & Marine Sciences)

9:15 AM - 9:30 AM

[MZZ44-02] Age estimate using ultrafine scale magnetostratigraphy on ferromanganese crusts and development of methodology

*Hirokuni Oda¹, Naoto Fukuyo¹, Masanobu Yamamoto², Akira Usui⁴, Teruhiko Kashiwabara³, Jun Kawai⁵, Miki Kawabata⁵ (1.Institute of Geology and Geoinformation, Geological Survey of Japan, AIST, 2.Hokkaido University, 3.JAMSTEC, 4.Kochi University, 5.Kanazawa Institute of Technology)

9:30 AM - 9:45 AM

[MZZ44-03] Rhythmical laminations of Ferromanganese Crust reveals a 6.5 million-year record of eolian dust flux to the Northwest Pacific

*Hitoshi Hasegawa^1,2, Nanako Koma¹, Akira Usui², Hirokuni Oda³, Hiroshi Kawabata¹, Norihiro Takahashi⁴, Takashi Ito⁴, Tomoyo Okumura², Go-Ichiro Uramoto², Teruhiko Kashiwabara⁵, Masanobu Yamamoto⁶ (1.Faculty of Science and Technology, Kochi University, 2.MaCRI, Kochi University, 3.AIST, 4.Ibaraki University, 5.JAMSTEC, 6.Hokkaido University)

9:45 AM - 10:00 AM

[MZZ44-04] Helium isotopes and beryllium-10 dating of manganese crust in the central Pacific Ocean

*Yuji Sano^1,2, Naoto Takahata², Kotaro Shirai², Sheng Xu³, Ye Yang³, Takuya Matsuzaki¹, Akira Usaui¹ (1.Marine Core Research Institute, Kochi University , 2.Atmosphere and Ocean Research Institute, University of Tokyo, 3.School of Earth System Science, Tianjin University)

10:00 AM - 10:15 AM

[MZZ44-05] Systematic understanding of solid-liquid partitioning and isotope fractionation based on the elucidation of adsorbed species of barium on manganese oxides

*Sota Ueno¹, Yuta Ijichi², Takehiro Hirayama¹, Teruhiko Kashiwabara², Akira Usui³, Akiko Yamaguchi¹, Yoshio Takahashi¹ (1.Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 2.Japan Agency for Marine-Earth Science and Technology, 3.Marine Core Research Institute, Kochi University)

10:15 AM - 10:30 AM

[MZZ44-06] Distribution of Fe and Mn in red clay on the deep seafloor of the northwestern Pacific

Taisei Hatano¹, *Masafumi MURAYAMA^2,3, Keiji Horikawa⁴, Takuya Sagawa⁵, Hideki Minami⁶, Naomi Harada⁷, Hajime Obata⁷ (1.Graduate school of Integrated Arts and Science, Kochi University, 2.Faculty of Agriculture and Marine Science, Kochi University, 3.Marine Core Research Institute, Kochi University, 4.Faculty of Science, Academic Assembly, University of Toyama, 5.Institute of Sciences and Engineering, Kanazawa University, 6.School of Biological Sciences, Tokai University, 7.Atmosphere and Ocean Research Institute, The University of Tokyo)

Session information