摘要
南海西缘断裂带是一条典型的右旋走滑断裂系统,是南海扩张的西部边界,两端形成具有明显走滑特征的“Y”型和“人”型构造。其前锋端形成走滑-伸展叠瓦扇,尾端形成走滑-收缩叠瓦扇,中部形成走滑-拉分双重构造的右旋走滑系统。其动力主要来源于白垩纪以来的印-藏碰撞、新生代印支挤出和南海扩张作用。经历了两期构造运动而形成的该断裂系统对其周边盆地的形成起到了主要控制作用。
The Western Margin Of South China Sea Fault is a typical dextral strike-slip fault system. It is the western border of the South China Sea opening. There are obvious structures of strike-slip character: Y and 人. The formation of the system is due to the collision of India with Tibet since Cretaceous ,the extrusion of Indochina Peninsula and the spreading of South China Sea in Cenozoic. The whole length of this fault system is about 700km, and it consists of the front extension imbricate fan in the southern segment, the pull-apart extension duplex structures in the middle segment and the trailing push-up contracted imbricate fan in the northern segment. Several basins are controlled by this fault zone in the west of the South China Sea.
出处
《海洋通报》
CAS
CSCD
北大核心
2005年第3期42-47,共6页
Marine Science Bulletin
基金
广东省自然科学基金(021561)
国家自然科学基金(40172091)
科技部专项"南沙群岛及其邻近海区综合调查"(2001DIA50041)
关键词
活动性
右旋断裂
走滑拉张
activity
dextral fault
strike-slip and extension
