Streak process due to irregular slab topography and the classification of subduction zones

Takao EGUCHI

Presentation information

Oral

Symbol S (Solid Earth Sciences) » S-CG Complex & General

[S-CG60] Geofluids and dynamics in subduction zones

Mon. May 25, 2015 2:15 PM - 4:00 PM 201A (2F)

Convener:*Ikuo Katayama(Department of Earth and Planetary Systems Science, Hiroshima University), Atsushi Okamoto(Graduate School of Environmental Studies), Tatsuhiko Kawamoto(Institute for Geothermal Sciences, Graduate School of Science, Kyoto University), Chair:Tatsuhiko Kawamoto(Institute for Geothermal Sciences, Graduate School of Science, Kyoto University)

2:15 PM - 2:30 PM

[SCG60-08] Streak process due to irregular slab topography and the classification of subduction zones

*Takao EGUCHI¹ (1.Dept. Earth and Ocean Sci., N.D.A.)

Keywords:streak, subduction zone, oceanic slab, convex topography

We demonstrate some physical features of streak (or abrasion) process associated with the surface convex topography of downgoing oceanic slab at subduction zones.

Then, we reconsider more realistic classification model of subduction zones, based on not only the streak process due to the irregular slab topography and/or with the degree of accreting process at the leading edge of the overriding lithosphere, but also the other tectonics parameters such as slab age etc.