菲律宾海板块与南海协同构造演化探讨

菲律宾海板块(Philippine Sea Plate，PSP)与南海(South China Sea，SCS)处于欧亚板块、太平洋板块和澳大利亚板块的交汇区域，其构造演化对东南亚、西太平洋乃至全球板块构造重建具有重要意义.虽然PSP和SCS的构造演化模型已经分别建立，但二者之间的协同演化关系还不明确.本文综述了PSP和SCS的古地磁数据、海底磁异常条带资料，并结合地震层析成像以及其他地质结果的约束，对二者的演化关系进行了探讨.PSP四国盆地与SCS在渐新世开始时，受控于统一的地球动力学系统，两者具有地质意义上的亲缘性.早中新世，澳大利亚板块与东南亚地块碰撞，致使PSP发生旋转，四国盆地开始与SCS发生分离，并逐渐向北运动和顺时针旋转，直至演化至现今位置.本文最后提出了这种协同构造演化模式有待解决的问题以及未来的研究展望.

Discussion on the co-evolution of the Philippine Sea Plate and the South China Sea

The Philippine Sea Plate (PSP) and the South China Sea (SCS), situated at the convergent area among the Eurasian Plate, the Pacific Plate, and the Australia Plate, are of great significance for the tectonic reconstruction in Southeast Asia, West Pacific, and even the globe. Although the tectonic evolution models of the PSP and the SCS have been constructed respectively, the co-evolution relationships between them are still not clear. In this paper, based on the published paleomagnetic data, submarine magnetic anomaly, seismic tomography, and geological constraints of the PSP and the SCS, we discuss the co-evolution of these two basins. It is suggested that the Shikoku Basin (SB) and the SCS started to be dynamically connected at the beginning of the Oligocene. Due to the Australia-SE Asia collision in the early Miocene, the PSP rotated, and the SB began to separate from the SCS and gradually moved to the present position. Finally, we discuss the unresolved problems and the future research prospects of this co-evolution model of the PSP and the SCS.