Akira Usui

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Convener, Chairperson

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

[J] Oral
| M (Multidisciplinary and Interdisciplinary)
| M-ZZ Others

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

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)

Thu. May 29, 2025 5:15 PM - 7:15 PM Poster Hall (Exhibition Hall 7&8, Makuhari Messe)

[J] Poster
| M (Multidisciplinary and Interdisciplinary)
| M-ZZ Others

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

Speaker, Author, Co-Author

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

[J] Oral
| M (Multidisciplinary and Interdisciplinary)
| M-ZZ Others

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

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)

Thu. May 29, 2025 5:15 PM - 7:15 PM Poster Hall (Exhibition Hall 7&8, Makuhari Messe)

[J] Poster
| M (Multidisciplinary and Interdisciplinary)
| M-ZZ Others

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

5:15 PM - 7:15 PM

[MZZ44-P01] Microstructures observed on the surface of ferromanganese crusts at the Takuyo-Daigo Seamount

*Makoto Miyajima¹, Shingo Kato^3,4, Akira Usui², Katsuhiko Suzuki⁴, Tomoyo Okumura² (1.Kochi Univ., 2.MaCRI, Kochi Univ., 3.RIKEN, 4.JAMSTEC)

5:15 PM - 7:15 PM

[MZZ44-P02] Ferromanganese Crusts - Reconstruction of Dissolved Oxygen Concentration in the Pacific Ocean since the Miocene

*Masanobu Yamamoto¹, Akira Usui², Hirokuni Oda³, Teruhiko Kashiwabara⁴, Hitoshi Hasegawa⁵ (1.Faculty of Environmental Earth Science, Hokkaido University, 2.Marine Core Research Institute, Kochi University, 3.National Institute of Advanced Industrial Science and Technology, 4.Japan Agency for Marine-Earth Science and Technology, 5.Faculty of Science and Technology, Kochi University)

5:15 PM - 7:15 PM

[MZZ44-P03] Occurrence, composition, microstructure and growth age of the ferromanganese crusts in the Minami Seamount, the Ogasawara Plateau

*Akira Usui¹, Tsubasa Kamei², Murayama Masafumi¹, Takeyasu Yamagata³, Hiroyuki Matsuzaki³, Ayumu Onda⁴ (1.Marine Core Research Institute, Kochi University, 2.Fac. Agriculture & Marine Sciences, Kochi University, 3.The University Museum, The University of Tokyo, 4.Fac. Science and Technology, Kochi University)