论文部分内容阅读
利用通过本区６条宽角反射／折射剖面资料对大同阳高震区及邻区地壳上地幔速度结构与构造进行了详细的研究。结果表明，地壳上地幔速度结构与构造在纵向和横向上具有明显的不均一性。浅部基底断裂发育，而在其深部，根据波组特征、壳内界面及速度等值线起伏变化和低速异常体的边界等推测有３处地壳深断裂带。本区最明显的上地壳低速体位于大同—阳原附近，其南界存在地壳深断裂，大同阳高地震群与该低速异常体和深断裂有关。
The velocity structure and structure of the crust and upper mantle in DatongYanggao earthquake area and its adjacent area are studied in detail by using six wide-angle reflection / refraction profiles in this area. The results show that the crust and upper mantle velocity structure and structure have obvious inhomogeneity in the longitudinal and transverse directions. There are three crustal deep fault zones in the deep part of the basement. According to the characteristics of the wave set, the variation of the in-shell interface and velocity contours and the boundary of low-velocity anomalies, it is speculated that there are three deep crustal faults in the deep part. The most obvious upper crustal low-velocity body in this area is located near Datong-Yangyuan, with deep crustal crustal fault in the south boundary and Datong-Yangao seismic group related to this low-velocity anomaly and deep fault.