Japan Geoscience Union Meeting 2022

Session information

[E] Oral

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

[S-CG43] Shallow and intermediate depth intraslab earthquakes: seismogenesis and rheology of the slab

Thu. May 26, 2022 9:00 AM - 10:30 AM 103 (International Conference Hall, Makuhari Messe)

convener:Saeko Kita(International Institute of Seismology and Earthquake Engineering, BRI), convener:Tomohiro Ohuchi(Geodynamics Research Center, Ehime University), Marina Manea(Computational Geodynamics Laboratory, Geosciences Center, National Autonomous University of Mexico), convener:Kurama Okubo(National Research Institute for Earth Science and Disaster Resilience), Chairperson:Marina Manea(Computational Geodynamics Laboratory, Geosciences Center, National Autonomous University of Mexico), Tomohiro Ohuchi(Geodynamics Research Center, Ehime University)

At depths exceeding 30 km, where the pressure reaches > 1GPa, many regular earthquakes and slow slip events occur within/above subducting slabs. It remains to be fully revealed that the intraslab earthquakes at such high pressures are described with frictional processes commonly used to model crustal earthquakes. It has long been believed that breakdown of hydrous minerals and pressure-induced phase transitions of major minerals could trigger intraslab earthquakes. Aqueous fluid released from the hydrous minerals seem to be related with slow slip events and some earthquakes. However, our understanding of the link between such "microscopic" phenomena and "macroscopic" earthquakes is still poor. The purpose of this session is to share constraints and advances in the understanding of the mechanisms controlling the occurrence of intraslab earthquakes. We seek to formulate future directions of the interdisciplinary study of the occurrence of intraslab earthquakes from the viewpoint of seismology, geodynamics and mineral physics. We welcome presentations from a wide variety of scientific disciplines, including observational and theoretical seismology, seismotectonics, geodynamics, mineral and rock physics, geology, and numerical modeling. Studies related to the thermal and tectonic structures of the subducting slab are also welcomed.

10:00 AM - 10:15 AM

*Francisco H Ortega Culaciati1, Vicente Yañez-Cuadra1,2, Marcos Moreno2, Andres Tassara3, Nicole Krumm-Nualart4, Javier Ruiz1, Andrei Maksymowicz1, Marina Manea5,6,7, Vlad Constantin Manea5,6,8, Jianghui Geng9 (1.Department of Geophysics, University of Chile, Chile., 2.Department of Geophysics, University of Concepcion, Chile, 3.Department of Earth Sciences, University of Concepcion, Chile, 4.Computation and Biology Laboratory, Fundacion Ciencia y Vida, Santiago, Chile., 5.Computational Geodynamics Laboratory, Centro de Geociencias, Universidad Nacional Autónoma de México, Campus Juriquilla, 76230, Querétaro, Mexico., 6.Astronomical Institute of the Romanian Academy, 040557, Bucharest, Romania., 7.Department of Geomorphology-Pedology-Geomatics, Faculty of Geography, University of Bucharest, Nicolae Balcescu 1, Sector 1, 010041, Bucharest, Romania., 8.Research Institute of the University of Bucharest–iCUB, University of Bucharest, 050095, Bucharest, Romania., 9.GNSS Research Center, Wuhan University, China.)

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