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东海是中国东部的大型边缘海,具有复杂的陆架盆地、特殊的沉积构成,以及西太平洋陆缘典型的沟-弧-盆构造体系,记录了大量大陆边缘演化、盆地形成和环境气候演变的信息.研究表明,在晚白垩世之前,华南大陆以东并无东海,而是古太平洋相伴.晚白垩世之后原始的东海开始形成,其后漫长的地质历史时期先后经历了晚白垩世至早始新世的被动陆缘阶段,以及中始新世以来的太平洋板块和菲律宾海板块两期俯冲和弧后扩张,奠定了现今东海西部为水深小的宽陆架,东部为水深较大的冲绳海槽的构造格局.现代的东海是在末次冰期(1 5 k a B P)之后形成的,海平面的变迁塑造了现代东海的海底地貌.
The East China Sea is a large margin of the East China Sea. It has complex shelf basins, special sedimentary structures, and typical groove-arc-basin tectonic systems in the western Pacific margins. It records a large number of information on the evolution of continental margins, basin formation and environmental climate The study shows that before the Late Cretaceous, there was no East China Sea to the east of the South China Sea, but accompanied by the Paleo Pacific Ocean.After the Late Cretaceous, the original East China Sea began to form, then the long geologic history experienced successively from the Late Cretaceous to the early The passive continental margin stage of the Pliocene and the two subduction and backarc expansion of the Pacific plate and the Philippine Sea plate since the Middle Eocene have laid the wide shelf of the western part of the East China Sea at a low water depth and the Okinawa Trough The modern East China Sea is formed after the last glacial period (15 ka BP), and the sea level changes shape the seabed landform of the modern East China Sea.