南海主要沉积盆地构造特征的差异性

Differences of Structural Characteristics on the Main Sedimentary Basins of South China Sea

本文从“十五”—2科考区域联测剖面出发,结合南海大地构造背景和以往研究成果,对南海主要的新生代沉积盆地的构造特征进行了对比分析。研究表明,“区域联测剖面”穿越的沉积盆地的构造特征具有显著的差异性,具体表现在大地构造背景、重磁场特征、盆地基底、断裂性质、构造线方向以及火成岩发育等方面；正确认识这些差异性无论对南海基础地质研究还是油气资源勘探,均具有重要的理论意义和实际价值。

Based on the regional tieline data of the second-time scientific investigation of the tenth five-year plan and combined with geotectonic setting and previous research results about South China Sea, this paper makes a comparative analysis on the structural characteristics of the main Cenozoic sedimentary basins of South China Sea. The study shows the structural features of the sedimentary basins crossed by the regional tieline are very different, and the disparities are concretely displayed in such aspects as geotectonic setting, gravity and magnetic field, basin basement, fault property, tectonic line trend and igneous rock, etc. It is very important and valuable both in theory and in practice recognizing the differences correctly to fundamental geological research and exploration of oil and gas of South China Sea.