地壳三维构造反演和速度层析成像

JOINT INVERSION OF 3-D CRUSTAL STRUCTURE AND VELOCITY DISTRIBUTION

本文给出了利用空间深地震测深反射破资料重建地壳三维构造和速度分布的方法．适用于任意分层并且每层可由若干断块组成的地壳模型．通过采用适当的反演方法获得地完界面的三维构造，并在此结果基础之上，进一步将剩余走时残差归因于地壳速度的不均匀性，采用模型不分块的反演方法．重建地完三维速度分布，数值模拟的结果表明算法是有效的．

In this paper the method to rcconstruct 3-D structure and velocity distribution of the crust from spatial deep seismic sounding data is given, which can bc used to the layered crustal model consisting of blocks in each layer. The 3-D structure of the crust is obtained using adequate inversion technique.Then, based on the model obtained, the remanent residuals of trave1times arc regarded as a resu1t of thc heterogeneitY or crustal velocity distribution, so the 3-D velocity distribution of the crust can bc reconstructed using inversion method without model blocks.Numerical modeling is made and shows that the algorithm used in this paper is effective.