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东海陆架盆地是位于欧亚板块中国东部大陆架东缘的中新生代复合断陷盆地,盆地南部具有“东西分带”、“南北分块”的构造格局。盆地内古新世沉降中心在盆地西部的瓯江凹陷;始新世,沉积中心向东迁移,呈现出瓯江凹陷、闽江凹陷和基隆凹陷3个沉积中心特征;渐新世早期,盆地西部开始抬升剥蚀,沉积中心迁移至基隆凹陷,直至中新世盆地西部才再次发生沉降。东海陆架盆地南部新生代构造演化特征可划分为古新世断陷期、始新世断拗转换期、渐新世—中新世拗陷以及上新世以后区域沉降4个时期,盆地东部构造演化时间稍晚于西部。
The East China Sea Shelf Basin is a Mesozoic-Cenozoic composite fault basin located on the eastern edge of the continental shelf of China-Eurasia plate. The southern part of the basin has a tectonic framework of “east-west zone” and “north-south zone”. The Paleocene subsidence center in the basin was located in the Oujiang Sag in the western part of the basin. During the Eocene, the sedimentary center migrated eastward and showed three sedimentary centers in Oujiang Sag, Minjiang Sag and Keelung Depression. During the Oligocene Oligocene, Began to lift and erode, the sedimentary center migrated to the Keelung depression, and did not settle again until the western Miocene basin. The Cenozoic tectonic evolution of the southern East China Sea Shelf Basin can be divided into the Paleocene rift period, the Eocene fault-bend transition period, the Oligocene-Miocene depression and the regional subsidence after the Pliocene. The eastern tectonics Evolution time later than in the west.