东海陆架盆地长江坳陷新生代原型盆地分析  

BASIN PROTOTYPE OF THE CENOZOIC CHANGJIANG DEPRESSION IN THE EAST CHINA SEA SHELF BASIN

作　　者：周均太[1,2] 李三忠[1,2] 索艳慧[1,2] 焦倩[1,2] 戴黎明[1,2] 赵峰梅[1,2] 吴奇[1,2] 徐磊[1,2] 金宠[1,2] 葛和平 

机构地区：[1]海底科学与探测技术教育部重点实验室,青岛266100 [2]中国海洋大学海洋地球科学学院,青岛266100 [3]中国海洋石油(上海)有限公司,上海200030

出　　处：《海洋地质与第四纪地质》2011年第1期77-84,共8页Marine Geology & Quaternary Geology

基　　金：基金项目：国家“863”项目（2009AA093401）;国家自然科学基金项目（90814011,40776038）;中国海洋石油（中国）有限公司项目（CT08-INS-019）

摘　　要：利用地震剖面对东海陆架盆地长江坳陷新生代构造进行解析，认为长江坳陷新生代经历多次构造运动，尤其古新世末的瓯江运动对该区构造定型尤为突出，其中，该坳陷中的挤压反转、地垒等构造对油气的圈闭、运移和保存具有重要意义。主要利用平衡剖面技术，对东海陆架盆地长江坳陷进行盆地原型的恢复。最后，结合长江坳陷的构造演化的特点，得出长江蝴陷古新世原型盆地类型为拉分盆地，原型盆地的长轴方向为EW向，但主要受NE向断裂控制，且盆地基本定型于T12之后。The interpretation of seismic profiles for Cenozoic structures of the Changjiang Depression in the East China Sea Shelf Basin was carried out. It suggests that many Cenozoic tectonic movements occur in this depression. The Oujiang movement happened in late Paleocene is especially important to the formation of the present geometry of the depression. Data show that inversed anticlines and horsts are very significant for trapping,migration and preservation of oil and gas in the Changjiang Depression, and T30 is a critical time for the formation of the present geometry. The technique of balanced sections is used for reconstruction of the prototype basin. It is concluded that the Changjiang Depression was a pull-apart basin in Paleocene with the long axis in EW direction. The faults in NE direction played most important role in the formation of the basin after the time of T12.

关 键 词：长江坳陷 原型盆地 构造演化 新生代 东海陆架 

分 类 号：P736.1[天文地球—海洋地质]