摘要
东海位于大陆板块和大洋板块接合部位,海域构造运动受两大板块活动的控制。海底为陆壳,在下地壳花岗岩层上面,具有四层地质结构。经历了中生代斯间的转换边缘、古新至中新世的被动边缘和晚始新世至第四纪的主动边缘等三个发展阶段。在每个阶段内产生过不同性质的构造运动,形成了挤压和拉张相互交替的构造格局。在海域不同部位,有不同的应力场,由西向东、由老到新,压应力场和张应力场,相互交替和重叠,形成了构造的复杂性。
The East China Sea is located at the conjunct region between the continental and oceanic plates, and the tectonic movements in the sea area controlled by the activities of these two plates. The sea floor attributed to continental crust can be divided into four structural levels at the lower crust above the granite layer, and have experienced three geological stages as: the transform margin during the Mcsozoic time, the passive margin of Paleocene -Miocene, and the active margin in the late Eocene-Quaternary. The tectonic movements of different natures in each stage resulted in tectonic frameworks in which the alternative compressional and extensional tectonic regines would be developed. The stress fields in the area would vary with their different positions in the sea area. From east toword west and the old to young , compressional and extensional stressfields alternated or overlapped one to another, constituting the complex tectonism of the area.
出处
《石油实验地质》
CAS
CSCD
北大核心
1992年第1期7-19,共13页
Petroleum Geology & Experiment
