[M-ZZ52] Marine Manganese Minerals: Depositional environments, exploration, and development

Tue. May 26, 2026 1:45 PM - 3:15 PM 104 (International Conference Hall, Makuhari Messe)

Chairperson:Takahashi Yoshio(Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo), Usui Akira(Marine Core Research Institute, Kochi University)

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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1:45 PM - 2:00 PM

[MZZ52-01] Cobalt-Rich Ferromanganese Crust Exposure Rate Assessment in Northwestern Pacific Seamounts Assisted by Deep Learning-Based Semantic Segmentation

*Yuta Ihara¹, Yoshio Nakasato¹, Daiki Suzushima¹, Hiroyuki Moriuchi¹, Wataru Yamada¹, Yuho Fujimaki², Akiko Suzuki³ (1. Sumiko Resources Exploration & Development Co., Ltd., 2. Sumiko Resources Exploration & Development Co., Ltd. (Current Affiliation: Sumitomo Metal Mining Co., Ltd.), 3. Japan Organization for Metals and Energy Security)

2:00 PM - 2:15 PM

[MZZ52-02] Modeling larval dispersal among deep seamounts in the Northwest Pacific

*Naoki Saito¹, Hiroki Kise¹, Travis W. Washburn^1,2, Eri Ikeuchi¹, Akira Iguchi¹, Hiroko Kamoshida³, Atsushi Suzuki¹ (1. National Institute of Advanced Industrial Science and Technology (AIST), 2. Texas A&M University - Corpus Christi, 3. Japan Organization for Metals and Energy Security (JOGMEC))

2:15 PM - 2:30 PM

[MZZ52-03] Improvement of a High Precision Age Estimation Method Using Ultra Fine Paleomagnetic Stratigraphy of Ferromanganese Crust

*Hirokuni Oda¹, Naoto Fukuyo², Masanobu Yamamoto³, Akira Usui⁴, Teruhiko Kashiwabara⁵, Hitoshi Hasegawa⁴, Jun Kawai⁶, Miki Kawabata⁶ (1. Institute of Geology and Geoinformation, Geological Survey of Japan, AIST, 2. Hosei University, 3. Hokkaido University, 4. Kochi University, 5. JAMSTEC, 6. Kanazawa Institute of Technology)

2:30 PM - 2:45 PM

[MZZ52-04] Initial stages of Fe–Mn oxide layer formation on Mn-free substrates

*Hiroshi Kawabata¹, Akira Usui¹ (1. Kochi University)

2:45 PM - 3:00 PM

[MZZ52-05] Iodine adsorption onto biogenic Fe and Mn oxides: Differences from inorganic minerals

*Sakiko Kikuchi¹, Teruhiko Kashiwabara¹ (1. Japan Agency for Marine-Earth Science and Technology)

3:00 PM - 3:15 PM

[MZZ52-06] Importance of manganese oxide on rare earth elements and cerium isotope signature in pelagic sediments

*Yoshio Takahashi¹ (1. Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo)

Session information