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《Geoscience》 2014-01
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Application of Crust Correction to the Teleseismic Tomography in the Middle and Lower Reaches of Yangtze River Region

XU Yao;ZHANG Gui-bin;JIANG Guo-ming;YAO Yong-bo;School of Geophysics and Information Technology,China University of Geosciences;  
This paper applied a crust correction method to study the middle and lower reaches of Yangtze River region,and the data used in the study were derived from 473 teleseismic events collected by 47 permanent stations. The results show that( 1) the low crust velocity anomaly is beneath inland area and the high crust velocity anomaly is beneath coastal area;( 2) there are slight velocity-anomaly differences between before and after crust correction,indicating that the crust structure of the middle and lower reaches of Yangtze River region is stable;( 3) with the depth increasing,the difference of velocity anomaly is becoming smaller,which means the impact of crust correction method in shallow depth is big while in deep depth is small. Therefore,in the teleseismic tomography study,if shallow information is shortage,the crust correction can be used to eliminate or reduce the influence of crust velocity structure to the final inverse results,and improve the quality of results in deep depth.
【Fund】: 国土资源部“深部探测技术实验与集成”专项项目(SinoProbe-02);; 中央高校基本科研业务费专项资金资助项目(2010ZD09 2012035);; 中国地质大学(北京)2012年教学实验室开放项目(2012BXY059)
【CateGory Index】: P631.4
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