Japan Geoscience Union Meeting 2014

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Poster

Symbol M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS27_2PO1] MarineMarine manganese deposits: Origin, growth processes, and environment

Fri. May 2, 2014 4:15 PM - 5:30 PM Poster (3F)

Convener:*Usui Akira(Dept, Natural Science), Yoshio Takahashi(Department of Earth and Planetary Systems Science, Graduate School of Science, Hiroshima University), Takashi Ito Takashi(Faculty of Education, Ibaraki University), Katsuhiko Suzuki(Institute for Research on Earth Evolution, Japan Agency for Marine-Earth Science and Technology)

4:15 PM - 5:30 PM

[MIS27-P01] On-site deposition and exposure experiments at a low-temperature hydrothermal area

*Akira USUI1, Hikari HINO1, Yohey SUZUKI2, Kyoko YAMAOKA3, Kei OKAMURA4 (1.Kochi University, 2.Earth & Planetary Sciences, Univ. Tokyo, 3.Geological Survey of Japan, AIST, Tsukuba, 4.Kochi Core Center, Kochi University)

Keywords:low-temperature hydrothermal activity, bayonaise hill, manganese minral, buserite, todorokite, adsorption

An on-site deposition and on-site adsorption experiments were carried out at a possible hydrothermal area in the Izu-Bonin arc, NW Pacific. The mineralogical and chemical analyses on the exposed glass, ceramics and on the artificial buserite samples suggested a new precipitation during 12 years and positive accumulation of some transitional metals. This finding was the first evidence of modern active precipitation of manganese oxide from normal sea water/ hydrothermal waters in the ocean floors.