摘要
为了深化对中国大陆及邻区上地幔介质形变强度和方向的空间变化图象、各向异性和剪切波分裂、各向异性以及应变、应变和构造过程关系的认识 ,我们以剪切波在分层各向异性介质中的传播理论为指导 ,以分裂剪切波观测为基础 ,借助数字化地震资料和高分辨率的信号处理技术 ,给出了对 1 3 6次地震的分析结果 ,得到了 2 0个台站下面的上地幔各向异性介质的变形强度和方向的空间变化图象 ;并结合已有研究结果 ,对中国大陆及邻区上地幔各向异性特性及其起源问题进行了讨论 .
In order to deepen the understanding of the spatial change images of upper mantle media for strain strength and polarization direction, anisotropy and shear wave splitting, anisotropy and strain, strain and the tectonic process, based on the theory on the characteristics of shear wave splitting parameters in the presence of two weak azimuthal anisotropic layers and observations concerned, and using signal identification methods with high precision, the results for 136 earthquakes are obtained. The pictures of anisotropy strength and polarization direction beneath twenty stations are got. Combining the results existed previously, the characteristics and origin of the upper mantle anisotropy are discussed.
出处
《地震学报》
CSCD
北大核心
2001年第4期337-348,共12页
Acta Seismologica Sinica
基金
国家自然科学基金 (4 973 41 5 0 )
地震科学联合基金 (1 980 61 )共同资助
关键词
剪切波分裂
识别方法
误差估计方法
上地幔
各向异性
中国
大陆
identification methods
shear wave splitting
error estimation method
anisotropy of upper mantle
