地震学报2013，Vol.35Issue(4)：485-497,13.DOI:10.3969/j.issn.0253-3782.2013.04.004
利用莫霍面Ps震相研究中国东北地区地壳各向异性
An investigation on crustal anisotropy of Northeast China using Moho Ps converted phase
摘要
Abstract
Using teleseismic events recorded by 65 broad-band digital seismic stations during June 2009 to June 2011 in Northeast China,we calculated receiver functions by conducting maximum entropy deconvolution in time domain,and obtained the crustal anisotropy parameters by using the improved shearwave splitting analysis.The result shows that in Northeast China,the dominant direction of fast wave polarity is approximately in NW-SE in this region,and the time delay between the fast and slow waves is 0.15-0.3 seconds.But the fast wave polarity direction is in NE-SW beneath other 7 stations,possibly due to the effect of local complex structure.Through a comparison study we find that the polarization direction of the fast wave is nearly perpendicular to the direction of principal compressive stress,and is approximately the same as the direction of the Eurasian plate movement and the result of SKS/SKKS analysis.It can be concluded that our result has revealed the tensile stress and the anisotropy may come from the middle and lower part of the crust in this region.关键词
东北地区/地壳各向异性/莫霍面转换波Ps/剪切波分裂Key words
Northeast China/crustal anisotropy/Moho converted Ps/shearwave splitting分类
天文与地球科学引用本文复制引用
张广成,吴庆举,李永华,潘佳铁,张风雪,管见..利用莫霍面Ps震相研究中国东北地区地壳各向异性[J].地震学报,2013,35(4):485-497,13.基金项目
国家自然科学基金(90814013)和国土资源部深部探测技术与实验研究专项(SinoProb-02-03)联合资助. （90814013）
