全球主要俯冲带处板块运动与地震各向异性及应力场的相关性讨论

Abstract

Abstract: 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 accordance with the preferred orientation of intraplate stress field. We statistically analyze the correlation between plate motion and seismic anisotropy as well as stress field within nine boundaries which contains mostly subduction zones. The result indicates that the 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 for RPM is better than that for APM. Because of the complexity of subduction mechanism and the diversity of controlling factors at plate boundary cont aining subduction zones,the correlation becomes much complex. Moreover, anisotropy at various sources of depth show different characteristics,and stress state is controlled by many factors, thus further discussion on the correlation is required.

Key words: Seismic anisotropy, Plate motion, Stress field, Subduction zones

CLC Number:

P315.7

HAN Peng, LIU Qian-qian, SUN Zhen-tian, WEI Dong ping. A Discussion on Correlation of Plate Motions with Seismic Anisotropy and Stress Field in Global Subduction Zones[J]. EARTHQUAKE, 2014, 34(4): 1-11.

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A Discussion on Correlation of Plate Motions with Seismic Anisotropy and Stress Field in Global Subduction Zones

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