Abstract: The Bohaiwan (Bohai Bay)basin lying on the basis of Mesozoic structures is a rifting basin developed from the Late Mesozoic. Its evolution can be divided into two stages: the first, tile Mesozoic stage ranging in age from the Late Triassic to the Late Eocene; and the second, the Tertiary stage, ranging in age from the Oligocene to the Recent. A series of wrench faults running parallel to each other with a NNE trend and a number of anticlinal and synclinal folds between them were formed in the Mesozoic stage by sinistral shear stress in a nearly SN direction. In the Tertiary stage, the Bohaiwan basin was formed under both the tensile and dextral shear stresses that pulled apart the crust along the Mesozoic faults. For this reason,the structures in the Bohaiwan basin which appear to be caused by tensile stress are aotnally reflections of shear-compression structural pattern of the Mesozoic.

摘要： 渤海湾盆地的演化可分两个时期:中生代时期,从晚三迭世开始,止于始新世末;第三纪时期,从渐新世开始以至于今。中生代时期,在近南北向左旋剪切作用下生成了一系列走向北北东,大致平行的平移断层和位于其间的背斜和向斜褶曲。第三纪时期,则在拉张兼右旋剪张作用下使地壳沿着中生代断层拉开,生成渤海湾盆地。因而渤海湾盆地虽表现为张性构造,但实际上反映的是中生代的剪切挤压构造格局。