陕西地区地壳速度结构的层析成象研究

本文利用CT成象技术，根据陕西及邻省的地震波到时资料，反演出本区域地壳的速度结构图，并从中找出速度异常分布区。高速区为陕北地区，处于鄂尔多斯地台内；低速区为关中南部大部分区域及陕南的汉中、石泉地区。最后，对反演结果进行了讨论。

TOMOGRAPHIC IMAGING OF THE CRUSTAL VELOCITY STRUCTURE IN SHANXI AREA

According to the data of the seismic arrival time in Shanxi and its adjacent provinces, the crustal velocity structure in the area is gained by using the technique of tomographal imaging in this paper. The unusual regions of velocity are found out from the distribution of velocity. There is high velocity region in the north of Shanxi which is located at Ordos block, and the low velocity regions are located at the south of Guanzhong, Hanzhong and Shiquan. Finally, the result for the inverse problem is discussed.