[S-SS17] 地震学的アプローチによる火山深部のマグマ供給系の解明

[SSS17-05] 地震波でみる火山の深部構造

*中島 淳一¹ (1.東京工業大学理学院地球惑星科学系)

キーワード：S波反射面、地震波トモグラフィ、低周波地震

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.