Japan Geoscience Union Meeting 2024

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[J] Oral

M (Multidisciplinary and Interdisciplinary) » M-ZZ Others

[M-ZZ42] Process, Environment, and Exploration of Marine Manganese Deposits

Tue. May 28, 2024 3:30 PM - 4:45 PM 302 (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), Takashi Ito(Faculty of Education, Ibaraki University), Yoshio Takahashi(Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo), Chairperson:Akira Usui(Marine Core Research Center, Kochi University), Katsuhiko Suzuki(Submarine Resources Research Center, Japan Agency for Marine-Earth Science and Technology), Takashi Ito(Faculty of Education, Ibaraki University), Yoshio Takahashi(Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo)

3:30 PM - 3:45 PM

[MZZ42-01] Significance of petrological description for marine ferromanganese deposits as sediment cores and mineral deposits.

*Akira Usui1, Hiroshi Kawahata 4, Kyoko Yamaoka2, Teruhiko Kashiwabara3, Hikari Hino4 (1.Marine Core Research Institute, Kochi University, 2.Advanced Institute for Science and Techonlogy, 3.Japan Agency for Marine and Earth Science and Techonology, 4.Kochi University)

Keywords:manganese crust, manganese nodule, petrology, paleoceanography

Ferromanganese oxide is one of the common components on the ocean bottom materials, which are of great significance as geological and paleoceanographic archives and as future economic mineral deposits. Because of their poorly crystalline and metastable natures, their mineralogical, geochemical and structural characteristics are often poorly described. We here attempt to specify important characteristics in order to understand the controlling parameters of variability of the deposits in terms of geological and petrological description. We review the laboratory petrographic methods and on--site observation and mapping to understand their growth processes, optimal environments, and mineral diversities.