Japan Geoscience Union Meeting 2019

Presentation information

[J] Oral

S (Solid Earth Sciences ) » S-SS Seismology

[S-SS17] Seismic evidence of volcanic roots

Wed. May 29, 2019 1:45 PM - 3:15 PM A08 (TOKYO BAY MAKUHARI HALL)

convener:Naofumi Aso(Tokyo Institute of Technology), Yohei Yukutake(Hot Springs Research Institute of Kanagawa Prefecture), Chairperson:Naofumi Aso, Yohei Yukutake

2:45 PM - 3:00 PM

[SSS17-05] Seismic imaging of deep structure beneath active volcanoes

*Junichi Nakajima1 (1.Department of Earth and Planetary Sciences, Tokyo Institute of Technology)

Keywords:S-wave reflector, seismic tomography, low-frequency earthquakes

Seismological observations clearly show that flux melting in the mantle wedge is a deep source of magmatism in subduction zones and generated melts are transported to the continental crust through a mantle upwelling flow. However, physical processes of magmatism beneath deep crust are poorly understood. Here I review seismological structures (seismic velocity and attenuation, S-wave reflectors, and low-frequency earthquakes) beneath active volcanoes in Japan, focusing on deep magma chambers and possible pathways of magmatic fluids to the upper crustal levels.