2021 Annual Meeting of Japan Association of Mineralogical Sciences (JAMS)

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Oral presentation

S1, S4: Earth materials science related to igneous processes and plate convergence region (Joint Special Session)

Fri. Sep 17, 2021 2:00 PM - 4:45 PM Zoom Session 3

Chairperson:DYUTI PRAKASH SARKAR(Hiroshima Uni.), Morihisa Hamada(Japan Agency for Marine-Earth Science and Technology)

3:45 PM - 4:00 PM

[S1,S4-06] Fluid inclusions in calcite of serpentinite mud seamounts in the Mariana forearc

[Presentation award entry]

*Chihaya Yamamoto1, Kento Kugimiya1, Shinya Ishido1, Tatsuhiko Kawamoto1, Yuji Ichiyama2 (1. Shizuoka Uni. Sci., 2. Chiba Uni. Sci.)

Keywords:fluid inclusion, salinity, plate boundary, Mariana forearc, subduction zone fluids

We report chemical species, salinity and homogenization temperature of fluid inclusions in calcite in serpentinite mud seamounts in the Mariana forearc and provide constraints on the chemical composition of subduction fluids. Based on the obtained data, we suggest that the fluid inclusions represent saline fluids derived from the plate boundary.