珠江口盆地的形成与南海的构造演化

BASEMENT STRUCTURE AND TECTONIC EVOLUTION OF THE PEARL RIVER MOUTH BASIN

南海地块在中生代早期与华南大陆边缘发生了一次陆陆碰撞,这一碰撞形成了研究地区中生代近EW向为主的构造格局,珠江口盆地及整个南海的演化都是在南海地块各块体裂离华南陆缘后发生的。盆地自晚白垩世以来,先后经历了不同构造方向的两期张裂阶段及张裂后沉降阶段。

An Early Mesozoic continent-continent collision took place between the South China margin and ' South China Sea Block'. The evolution of the Pearl River mouth basin and the South China Sea was the result of the rifting away from China of different fragments of the ' South China Sea Block'. Since Late Cretaceous, the Pearl River mouth basin has undergone in sequence two stages of rifting (K2-E21,E13-E32) and one stage of post-rifting subsidence (E33-Present).