南海形成演化探究

Study on Formation and Evolution of the South China Sea

通过分析前人对南海的研究,对南海扩张期次、扩张脊结构、动力来源等几个关键研究问题进行探讨。认为应将南海放入到欧亚板块、印度-澳大利亚板块和太平洋板块三大板块相互作用的统一构造应力场中进行研究。利用FLAC软件,首次对南海及邻区进行数值模拟分析,并进一步探讨了南海的形成演化机制,认为南海的打开和扩张是印度板块与欧亚板块的碰撞、地幔柱上涌以及太平洋板块向欧亚板块的俯冲共同作用的结果。

In this paper, several key issues including the spreading periods and times, the spreading ridge structure and the dynamic source of the South China Sea are explored by analyzing the previous study results of the South China Sea, and it is concluded from the analysis results that the study on the South China Sea should be made in a unified tectonic stress field generated by the interaction between the Eurasian plate, the Indian-Australian plate and the Indian plate. The FLAC software is firstly used to make a numerical simulation and analysis of the South China Sea and its adjacent areas, and the formation and evolution mechanism of the South China Sea is then discussed. It is concluded that the opening and spreading of the South China Sea resulted from the joint effects of collision of the Indian plate and the Eurasian plate, mantle plume upwelling and subduction of the Pacific plate beneath the Eurasian plate.