苏北-南黄海盆地构造演化

苏北及南黄海盆地是由多期、多类盆地叠加的复合残留盆地,地质概况基本相似,成因演化近同,自元古界下扬子板块形成后,主要经历了古-中生代地台、中生代前陆盆地、走滑拉分盆地时期以及新生代断陷、坳陷盆地时期.在古生代-中生代发展过程中是一个整体,晚白垩世盆地演化出现分化,发育伸展盆地群,形成一系列叠置在中、古生代盆地之上的箕状断陷,箕状断陷的发育及分布明显受中-古生界内部先存逆冲断裂的控制.

TECTONIC EVOLUTION OF THE NORTH JIANGSU-SOUTH YELLOW SEA BASIN

The North Jiangsu-South Yellow Sea Basin is a composite residual basin superimposed by multistage and multitype basins. They have similar geologic setting and alomost the same genetic evolution. Since the Lower Yangtze Plate was formed in the Proterozoic, the two basins have mainly experinced the Paleo-Mesozoic platform, the Mesozoic foreland basin and the strike-slip extensional basin periods as well as the Cenozoic fault basin and down-warped basin periods. During the Paleo-Mesozoic developing progress, they were a whole mass. In the Late Cretaceous, the differentiation appearred in the evolution of the two basins. Extensional basin groups were developed, and a series of listric fault depressions were formed superimposed on the Meso-Paleozoic basins. The development and distribution of listric fault depressions were apparently controlled by the thrust faults preexisting in the internal of the Paleozoic .