JpGU-AGU Joint Meeting 2017

講演情報

[EE] ポスター発表

セッション記号 S (固体地球科学) » S-IT 地球内部科学・地球惑星テクトニクス

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

2017年5月22日(月) 15:30 〜 17:00 ポスター会場 (国際展示場 7ホール)

コンビーナ:中川 貴司(海洋研究開発機構数理科学・先端技術研究分野)、趙 大鵬(東北大学大学院理学研究科附属地震・噴火予知研究観測センター)、芳野 極(岡山大学惑星物質研究所)

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

*yi sui1rui qing zhang1qing ju wu1 (1.Institute of Geophysics China Earthquake Administration)

キーワード: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.