Japan Geoscience Union Meeting 2016

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International Session (Oral)

Symbol S (Solid Earth Sciences) » S-IT Science of the Earth's Interior & Techtonophysics

[S-IT12] Tectonic processes on the incoming plate seaward of the trench: Inputs to subduction zones

Mon. May 23, 2016 1:45 PM - 3:15 PM 201B (2F)

Convener:*Makoto Yamano(Earthquake Research Institute, University of Tokyo), Tomoaki Morishita(School of Natural System, Colleage of Science and Technology, Kanazawa University), Gou Fujie(Japan Agency for Marine-Earth Science and Technology), Susanne Straub(Lamont-Doherty Earth Observatory, Columbia Univ., USA), Chair:Gou Fujie(Japan Agency for Marine-Earth Science and Technology)

2:30 PM - 2:45 PM

[SIT12-04] Visco-elasto-plastic deformation and hydration of oceanic plates at trench-rise sytems

*Manuele Faccenda1 (1.Dipartimento di Geoscienze, University of Padova)

Keywords:slab hydration, plate bending, numerical modelling

Over the last decade, bending-related normal faulting and hydration of the incoming oceanic plates has been widely observed at trench-rise systems by geophysical surveys. Along with these observations, 2D numerical models of spontaneously bending oceanic plates have contributed to investigate the dynamical evolution of visco-elasto-plastic deformation patterns and the mechanisms of plate hydration by downward seawater percolation along normal faults. In this contribution, I will discuss the main tectonic processes occurring at the trench-rise system within the incoming plate on the basis of the principal geophysical and numerical experiments conducted so far.