阿尔金断裂系及邻区剪切波各向异性研究  

STUDIES ON SHEAR WAVE ANISOTROPY BENEATH ALTYN FAULT SYSTEM AND ITS ADJACENT AREA

作　　者：董英君[1] 薛光琦[1] 马开义[1] 姜枚[1] 

机构地区：[1]中国地质科学院,北京100037

出　　处：《地球物理学进展》1999年第4期58-65,共8页Progress in Geophysics

基　　金：中法合作项目

摘　　要：利用中法合作布设在青藏高原西北缘的三分量数字地震仪记录到的远震SKS波数据,计算并研究了台站下方岩石圈各向异性的特征研究结果表明:阿尔金断裂系南北的各向异性存在较大差异,阿尔金断裂系附近快波偏振方向在N80E左右,而柴达木盆地快速波偏振方向在N145W左右.同时阿尔金断裂系各向异性强度也比柴达木盆地的强.Lithosperic anisotropy has been studied using the data of SKS wave recorded at the 3-component stations that were deployed by the Sion-French cooperative seismic experiment in northeastern Tibetan Plateau. Results indicate fairly big differences between anisotropical features of north and south sides of Altyn Fault System. Fast directions near Altyn Fault System average N80°E,whereas it is about N45°W beneath the Qaidam basin. In addition,the former is stronger than the latter,which is a striking indication of oriented material movement deep beneath the Altyn Fault System.

关 键 词：SKS波 各向异性 上地幔变形 阿尔金断裂系 

分 类 号：P534.3[天文地球—古生物学与地层学]