JpGU-AGU Joint Meeting 2017

Presentation information

[EE] Poster

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

[S-IT23] [EE] Structure and Dynamics of Earth and Planetary Mantles

Mon. May 22, 2017 3:30 PM - 5:00 PM Poster Hall (International Exhibition Hall HALL7)

convener:Takashi Nakagawa(JAMSTEC/MAT), Dapeng Zhao(Department of Geophysics, Tohoku University), Takashi Yoshino(Institute for Planetary Materials, Okayama University)

[SIT23-P09] P and SH wave upper mantle velocity structure beneath South China

*yi sui1, rui qing zhang1, qing ju wu1 (1.Institute of Geophysics China Earthquake Administration)

Keywords:triplciation, upper mantle , partial melting

There is widespread intracontinental orogen and magmatic province in Mesozoic South China. Study of upper mantle velocity can bring light on the distribution and movement of material in deep earth of this region. Triplication waveform of P and SH from 5 to 30 degree recorded by CDSN(Chinese Digital Seismic Network) are used to obtain P and SH wave upper mantle velocity structure by comparing with synthetic waveform. There is low velocity layer above 410 in both P and S waveform, and 410km discontinuity is broadened. Low P and low S velocity and high Vp/Vs may be result of partial melting related to plate subduction.