在广东大亚湾周围地区,采用地震转换波法取得了该区地壳和上地幔结构的初步研究结果。在大亚湾地区的地壳中只能分出一个中间界面(界面C)和莫霍界面(M)。本区为两层地壳,地壳厚度为28—30公里。地壳和上地幔界面埋深变化不大,深断裂不发育,本区深部构造特征与地震活动性较高的华北地区相比有较大差别。 In the area around Daya Bay, Guangdong, a preliminary study on the structure of the crust and upper mantle in the area has been made using seismic wave transformation method. Only one intermediate interface (interface C) and Moho interface (M) can be separated in the crust of the Daya Bay area. The area is two layers of crust, crust thickness of 28-30 km. There is not much change in the buried depth of the crust and the upper mantle interface, and the deep faults are not developed. The deep structural features in this area are quite different from those in North China, where the seismic activity is higher.