摘要
通过搜集1986～2001年间亚洲、部分欧洲及西太平洋地区台网44个数字地震台记录的187个地震事件,约1500条三分量长周期数字化地震记录。从中挑选出390条很好地覆盖了青藏高原及邻区大圆传播路径,采用面波频散反演方法,对70°E～110°E,10°S～45°N范围地壳上地幔不同深度(8～430km)进行1°×1°高分辨率三维S波速度成像。根据成像结果对青藏高原的地壳厚度进行了推断,讨论了青藏高原的构造演化及其动力学特征。
In the present study, 3-D high resolution S wave velocity tomography by 1°×1° cells have been performed within the limits of crust and upper mantle from by using surface wave dispersion inversions,through collecting 1500 three components long-period digital seismic records from 187 representative events recorded by 44 seismic network stations which over Asia, part Europe and the west Pacific Ocean areas from 1986 to 2001, picking out 390 accurate surface wave dispersion cures which great circle path nearly cover Tibetan plateau. According to the tomography rsults about S wave velocity, crust thickness of Tibetan plateau has been detected. This paper discusses the structure evolution and dynamics feature of Tibetan plateau.
出处
《物探与化探》
CAS
CSCD
2003年第1期73-78,共6页
Geophysical and Geochemical Exploration
关键词
面波
频散
青藏高原
三维层析成像
岩石圈
软流圈
结构
surface wave
dispersion
Tibetan plateau
tomography
the structure of lithosphere and rheosphere
