[M-ZZ44] Marine manganese deposits - Genesis, exploration and development

Thu. May 25, 2023 1:45 PM - 3:00 PM 301A (International Conference Hall, Makuhari Messe)

convener:Akira Usui(Marine Core Research Center, 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), Takashi Ito(Faculty of Education, Ibaraki University), Chairperson:Akira Usui(Marine Core Research Center, Kochi University), Takashi Ito(Faculty of Education, Ibaraki 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 occur in all world oceans, as nodules, crusts, and massive aggregates. The deposits are known as potential resources of Co, Cu, Ni, REE as well as geological archives of surface environments. However, the controlling parameters on the regional and temporal variations in chemical and mineralogical composition have not been well understood yet. In the session, various factors in growth, enrichment and circulation of metals, paleoenvironment, formation age are discussed with the results of exploration and environmental impact studies from viewpoints of geosciences, engineering, and environments.

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1:45 PM - 2:00 PM

[MZZ44-01] Estimation of ferromanganese crust exposure and thickness of surface sediments using multibeam acoustic sonar and sub-bottom profiler

*Taku Kaji¹, Oak Yono¹, Hikari Hino², Haruhisa Morozumi² (1.Ocean high technology institute, Inc., 2.Japan Organization for Metals and Energy Security (JOGMEC))

2:00 PM - 2:15 PM

[MZZ44-02] Characteristics and controlling factors of regional variations in ferromanganese crusts: Case study at a seamount in the NW Pacific

*Hikari Hino^1,2, Akira Usui², Kenichi Kurihara¹, Haruhisa Morozumi¹, Suzuki Akiko¹ (1.Japan Organization for Metals and Energy Security, 2.Kochi University)

2:15 PM - 2:30 PM

[MZZ44-03] Observation and simulation of flows in a seamount with cobalt-rich ferromanganese crusts

*Naoki Saito¹, Masayuki Nagao¹, Atsushi Suzuki¹ (1.National Institute of Advanced Industrial Science and Technology)

2:30 PM - 2:45 PM

[MZZ44-04] Amphipod biodiversity and genetic connectivity at Northwest Pacific seamounts with Co-rich ferromanganese crusts

*Eri Ikeuchi¹, Akira Iguchi^1,2, Hiroki Kise¹, Hiroyuki Yokooka³, Shogo Kato³, Hideki Sugishima³, Kazumasa Ikeda⁴, Ryuichi Miwa⁵, Miyuki Nishijima¹, Yuichiro Tanaka¹, Junpei Minatoya⁶, Atsushi Suzuki^1,2 (1.Geological Survey of Japan, AIST, 2.Research Laboratory on Environmentally-conscious Developments and Technologies (E-code), AIST, 3.IDEA Consultants, Inc., 4.Okamoto Glass Co., Ltd., 5.Kaiyo Engineering CO., LTD., 6.Japan Organization for Metals and Energy Security (JOGMEC))

2:45 PM - 3:00 PM

[MZZ44-05] Water column profile around Takuyo-Daigo Seamount and monitoring of seawater chemistry in the excavating test of cobalt-rich ferromanganese crusts

*Kyoko Yamaoka¹, Atsushi Suzuki¹, Ayumi Tsukasaki², Masahiro Suzumura², Yanbei Zhu³, Tomoko Ariga³, Tatsuo Fukuhara⁴, Shunsuke Kondo⁴, Jumpei Minatoya⁵ (1.Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), 2.Environmental Management Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 3.National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology (AIST), 4.KANSO TECHNOS CO., LTD., 5.Japan Organization for Metals and Energy Security (JOGMEC))

Session information