南北地震带和两侧的瑞利面波群速度差异及其大地构造意义.

本文测量了南北地震带和两侧的瑞利波群速度,各路径间有系统的差别。反演频散得出地壳横波速度结构。按中地壳速度,可分为速度逆转型、低速型和高速型,分别与构造运动的活跃区、活化区和稳定区相关。 

GROUP VELOCITY DIFFERENCES OF RAYLEIGH WAVES BETWEEN THE NS SEISMIC BELT,CHINA, AND THE SIDE REGIONS,AND THEIR TECTONIC IMPLICATIONS

Group velocities of the fundamental mode of Rayleigh waves are measured for the NS seimic belt,China and regions on its sides. Systematic differences are found between the wave paths. Shear wave velocity structures are obtained by inversing the dispersions. According to the velocity in the intermediate crust,the structures,can likely be classified into the reverse,low (non-reverse) and high velocity models. These can be tectonically related to the active,reactivated and stable regions respectively.