Abstract: During the past 4 years (1975-1979) eight seismic profiles have been compiled by using the method of earthquake-generating converted waves in the Beijing-Tianjin-Tangshan region. Some details about the method of interpretating these data and the important results obtained are presented in this paper. This method is very useful in the regional investigations for earth’s crust and upper mantle.The comparison of the deep-seated structures and the distribution of earthquakes in the studied region indicates that all hypocentres of strong earthquakes just filled in some particular position of the granitic layer and that the Tangshan and Mafan strong earthquake regions are similar each other in the deep-seated structure characteristics, such as relative uplift of the granitic layer, intensive depression (concavity) of interfaces in upper mantle, sharp thickening of lithosphere and existence of deep-seated faults in the region under investigation.

摘要： 1975-1979年间在京津唐地区完成了八条地震转换波测深的剖面工作,本文介绍所取得的主要成果。结果表明转换波法用于地壳、上地幔深部结构的探测是有效的。深部构造剖面与震源分布的对比表明,本区几乎所有强震震源都分布在“花岗岩”层的某些特殊部位上。唐山和马坊大震地区的深部构造具有相似的特征,这就是“花岗岩”层的相对隆起,上地幔界面的强烈凹陷,岩石圈相应地急剧增厚以及存在深大断裂。