渤海湾盆地中、新生代断裂发育的横向差异性

The lateral diversities of the faulting during Mesozoic-Cenozoic in the Bohai Bay Basin

对渤海湾盆地中、新生代断裂活动特征和横向差异性进行了研究，对控制断裂活动的动力学机制进行了探讨。渤海湾盆地中、新生代以来，受到区域性的NW—SE伸展作用，动力是太平洋板块向中国东部大陆俯冲造成的上地幔热隆起，形成了NE、NNE向构造带。靠近郯庐断裂带的济阳坳陷、渤中坳陷，中生代至早始新世时期受郯庐断裂带的左旋走滑作用控制，发育NWN断裂。上地幔隆升作用的推移和郯庐断裂带运动性质的转变，决定了渤海湾盆地断裂发育的横向不均一性。

We studied the characteristics and their lateral diversities of the Mesozoic-Cenozoic faults in the Bohai Bay Basin. Their formation mechanism was discussed too.Our results show that the extensional process of NW-SE trending,associated with the upheaval of upper mantle caused by the subduction of the Pacific plate, general controlled the Bohai Bay Basin in Mesozoic-Cenozoic, leading to the tectoic zone of NE-NNE trending. But the Jiyang Depression and Bozhong Depressin were controlled by the the sinistral strip-slip movement of the Tanlu fault zone in Mesozoic and early Eocene, and NW trending faults controlled the basin pattern. These two dynamical system and their evolution decided the horizontal diversities of the Bohai Bay Basin.