莺歌海盆地反转构造变形特征及其动力学演化  

CHARACTERISTICS AND DYNAMIC EVOLUTION OF INVERTED STRUCTURE IN YINGGEHAI BASIN

作　　者：宋维宇[1,2] 

机构地区：[1]中国地质大学资源学院,武汉430074 [2]青岛海洋地质研究所,青岛266071

出　　处：《海洋地质与第四纪地质》2012年第2期77-83,共7页Marine Geology & Quaternary Geology

基　　金：国家重点基础研究发展规划项目(2007CB411700)

摘　　要：莺歌海盆地位于印支半岛与南海北部大陆边缘交接区,复杂的地质构造背景使其形成演化的动力学机制成为国内外研究的焦点。综合新的区域资料,对影响莺歌海盆地发育的区域构造演化特征进行了系统分析,认为新生代以来印度板块与欧亚板块的碰撞造成印支板块的逃逸构造,以及印支板块的顺时针旋转,红河断裂带新生代的变形机制,直接或间接地控制了莺歌海盆地的形成与演化。在此背景条件下,莺歌海盆地新生代以来的构造演化经历了3个阶段,即左旋走滑-伸展裂陷阶段、地壳韧性伸展-热沉降阶段和加速沉降阶段。The Yinggehai basin is located in the juncture area between Indo-China continental block and northern continental margin of the South China Sea. The dynamical mechanism for generation and evolution of the Yinggehai basin has become a debating focus due to its complicated tectonic setting. Regional tectonic evolution which affects the development of the Yinggehai basin is systematically analyzed by inte gration of new regional data. It is believed that the escape structures formed by the collision of India plate and Eurasia plate, the clockwise rotation of Indo-China block and the deformation mechanism of the Red River Fault Zone in Cenozoic period controlled the generation and evolution of the Yinggehai basin directly or indirectly. There are three tectonic evolution phases in the Yinggehai basin. They are sinistral strikeslip extension phase, crust ductile extension and thermal subsidence phase, and accelerated subsidence phase.

关 键 词：逃逸构造 构造演化 莺歌海盆地 红河断裂带 

分 类 号：P736.1[天文地球—海洋地质]