A Discussion on Correlations of Plate Motion with Seismic Anisotropy and Stress Field in Plate Bound

• 作 者: Han Peng Liu Qianqian Sun Zhentian Wei Dongping
• 机 构: Key Laboratory of Computational Geodynamics,Chinese Academy of Sciences,College of Earth Science,Uni
• 出 处: Earthquake Research in China
• 发表日期: 2015年03期
• 关键词: subduction anisotropy absolute interior mantle continental perpendicular preferr

In many parts of the global plates,including subduction zones,mid-ocean ridges and even the interior of the continental plates,seismic anisotropy has a certain correlation with image of absolute plate motion( APM),or is in accord with the predominant direction of the intraplate stress field. In our study,a statistical analysis is done on the correlations of plate motion with seismic anisotropy as well as a stress field within nine plate boundaries which contain major subduction zones in the globe. Results indicate that absolute or relative plate motion( RPM) controls the seismic anisotropy and stress field of the plate boundary,which is especially obvious for the RPM. It can also be inferred that the correlation of RPM is better than that of APM. Because of the complexity of subduction mechanism and diversity of controlling factors at plate boundaries containing subduction zones,the correlation becomes much complex. Sources of anisotropy at various depths show different characteristics,and stress state is controlled by many factors,thus further discussions on the correlations are required.