【摘要】 通过对东海陆架盆地新生界地质结构特征及迁移规律研究,认为新生界盆地地质结构在平面上具有"早期南北分块、晚期东西分带"的特征;剖面上在西部主要表现为"东断西超"的箕状断陷结构,东部为双层结构,T03反射地震界面之下为地堑式结构,之上为"东断西超"的箕状结构。由于西部坳陷带箕状断陷结构之下的中生界也具双断结构,因此这种双层结构在盆地内部具有自西向东的迁移规律,这在整个东海地区的盆地中表现也较为明显。除此之外,盆内断裂、岩浆活动期次西早东晚,主要沉积地层西老东新,均表现出自西向东的迁移特征。盆地东界断裂控制沉积,盆地发生掀斜运动致使其西侧抬升剥蚀,成盆期(晚中生代)的原始西界已被剥蚀而向东缩移,盆地向东迁移至现今位置。更多还原

【Abstract】 Through research of characteristics of Cenozoic structure and migration rules of the East China Sea Shelf Basin,it was considered that the planar structure of the Caenozoic basin had the characteristics of being blocked from south to north at the early stage and belted from west to east at the late stage.The characteristics of the section structure were obvious,the west depression belt was a half-graben basin with the eastern steep slope zone and the western slope zone;the east depression belt represented two-layer structure,below the T03 seismic interface there was a graben basin,while above it there was a half-graben basin.Because of the existence of double-fault structure in the Mesozoic of western depression,this two-layer structure had a rule of migration from the west to the east,it existed in the basin of the whole Donghai Area.Besides,the stage of magmatic and fault activities in the basin was early in the west and late in the east,the main strata included that the west part was older and the east part was younger,they all presented the characteristics of migration from the west to the east in the basin.The east boundary fault of basin controls the deposition,fault tilting movement results in the uplift-erosion in the west part of the basin.The original west boundary of basin period(late Mesozoic) has experienced erosion and eastward migration,and the basin has been migration to present position.更多还原