C-6: Fluid-rock interactions during slow and fast earthquakes.

[OC6-04] Geochemical evidence of seawater percolation into subducting pelagic siliceous sediments

*Asuka Yamaguchi¹, Hitomi Mizuno¹, Hanaya Okuda^1,2, Takashi Sano³, Akira Ijiri⁴, Minoru Ikehara⁵ (1. Atmosphere and Ocean Research Institute, the University of Tokyo (Japan), 2. Kochi Institute for Core Sample Research, JAMSTEC (Japan), 3. National Museum of Nature and Science,Tokyo (Japan), 4. Graduate School of Maritime Sciences, Kobe University (Japan), 5. Marine Core Research Institute, Kochi University (Japan))

Keywords:chert, subduction zone, fluid flow