Japan Geoscience Union Meeting 2019

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[J] Poster

M (Multidisciplinary and Interdisciplinary) » M-GI General Geosciences, Information Geosciences & Simulations

[M-GI34] Marine Manganese Minerals

Tue. May 28, 2019 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall8, Makuhari Messe)

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

[MGI34-P01] Microstratigraphy of hydrogenetic ferromanganese crusts in the Takuyo-Daisan and -Daigo seamounts

*Akira Usui1, An-na Nagaoka2, Michiko Kawamura1 (1.Marine Core Research Center, Kochi University, 2.Graduate School of Science, Kochi University)

Keywords:ferromanganese crust, microstratigraphy, seamount

Hydrogenetic ferromanganese crusts cover almost all the rock outcrops on the slopes of the Takuyo #3 and #5 seamounts. The secular variations in physical properties are in some cases correlated with the mineral composition or chemical compositions. The youngest Pliocene Zone is enriched with tiny quartz particles with benthic foraminifers, while the older Miocene zone is characterized by coarser mineral grains of volcanic rock origin. Thus the apparent zoning and correlation patterns are overlapped both with local and regional environmental parameters.