南黄海盆地北部凹陷古近纪伸展断层转折褶皱作用  

Paleogene extensional fault-bend folding in north depression of southern Yellow Sea basin

作　　者：王胜利[1] 卢华复[1] 李刚[2] 陈建文[2] 陈国威[2] 

机构地区：[1]南京大学地球科学系,江苏南京210093 [2]青岛海洋地质研究所,山东青岛266071

出　　处：《石油与天然气地质》2006年第4期495-503,共9页Oil & Gas Geology

基　　金：南京大学科研启动费资助

摘　　要：南黄海北部坳陷为欧亚大陆东部边缘一系列新生代裂谷盆地中的一个。北部坳陷中的东北凹陷为向下逐段变缓、北倾的威海正断层上盘沿断层向北运动导致上盘断层转折褶皱作用而在上盘之上形成的凹陷。伸展断层转折褶皱作用发生过程中,东北凹陷同时接受沉积,形成生长地层,其详实记录了凹陷的发育过程。通过对生长地层的研究,南黄海北部坳陷东北凹陷总的伸展量为10 012 m,平均伸展速率为0.225 mm/a。这些数值同亚洲大陆东缘的渤海湾盆地、苏北盆地和东海盆地等古近纪伸展盆地内部单个凹陷的伸展速率具有相似性。The north depression in the southern Yellow Sea basin is one of the Cenozoic rift basins in the east margin of the Eurasian continent. The northeast sag in the north depression was formed by fault-bend folding of the hanging wall of the north dipping listric Weihai normal fault caused by the northward movement of the ing wall. In the process of extensional fault-bend folding, the sediments deposited simultaneously and the hangmm/a, quite similar to those of single sags in the Paleogene rift basins in east margin of Eurasia, such as the Bohai bay basin, the Subei basin, and the East China Sea basin.

关 键 词：伸展断层 转折褶皱 生长地层 伸展速率 南黄海盆地 

分 类 号：TE111.2[石油与天然气工程—油气勘探]