论文部分内容阅读
本文以我国首次试验的渤海西、南部海陆结合带航空重力测量资料为依据,探讨了郯庐断裂在渤海西、南部海域的空间展布及其围区的构造几何学特征。研究表明,(1)渤海南部和西部两个明显的NNE向重力异常梯级带属于区域不同重力场的分界线,分别是郯庐断裂带东支断裂(主干断裂)和西支断裂的反映;(2)郯庐主断裂东侧主要发育NE-NNE向重力异常梯级带,西侧呈现NW向、NE-NNE向、近EW向重力异常梯级带相互交错的面貌,反映了东、西两侧不同的断裂构造格局;(3)重力异常小区与异常梯级带的不同组合,反映了拉张、压缩、扭动三类构造样式;(4)不同的重力异常区、亚区、小区,反映了不同的沉积构造特征,分别对应不同的构造单元。
Based on the data of airborne gravimetry in the west China Sea and the southern coast of Bohai Sea which was first tested in China, the paper discussed the spatial distribution of the Tanlu fault in the western and southern Bohai Sea and its tectonic features. The results show that (1) two obvious NNE gravity anomalous cascade belts in the southern and western Bohai Sea belonged to the dividing line of different gravitational fields in the region, which were respectively the reflection of the eastern branch and the west branch of the Tanlu fault zone; 2) The NE-NNE gravity anomalous cascade belonged mainly to the east side of the main fault of Tanlu, showing NW, NE-NNE, and near-EW gravity anomalous cascading straps staggered with each other on the west, reflecting different East and West sides (3) Different combinations of gravity anomalous zone and anomalous cascade zone reflect three types of tectonic styles of tension, compression and wringing; (4) Different gravity anomalies, sub-regions and sub-regions reflect differences The sedimentary tectonic features correspond to different tectonic units.