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现代地质 ›› 2006, Vol. 20 ›› Issue (1): 19-29.

• 盆地构造 • 上一篇    下一篇

中国南海不同板块边缘沉积盆地构造特征

李文勇1,2,3,李东旭1,2   

  1. 1中国地质大学地质过程与矿产资源国家重点实验室,北京100083;2中国地质大学岩石圈构造、深部过程及探测技术教育部重点实验室,北京100083;
    3国土资源部广州海洋地质调查局,广东广州510760
  • 收稿日期:2005-11-15 修回日期:2005-12-30 出版日期:2006-01-20 发布日期:2006-01-20
  • 作者简介:李文勇,男,教授级高级工程师,博士后,1966年出生,构造地质学专业,主要从事构造地质与海洋地质研究工作。

Tectonic Characteristics on the Sedimentary Basins with Different Plate Margins in the South China Sea

LI Wen-yong1,2,3, LI Dong-xu1,2   

  1. 1 State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing100083,China;
    2Key Laboratory of Lithosphere Tectonics and Lithoprobing Technology of Ministry of Education, China University of Geosciences,
    Beijing100083, China; 3 Guangzhou Marine Geological Survey, Ministry of Land and Resources,  Guangzhou,  Guangdong510760, China
  • Received:2005-11-15 Revised:2005-12-30 Online:2006-01-20 Published:2006-01-20

摘要:

基于科学考察区域联测剖面资料,结合南海大地构造背景研究,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,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。南海断裂的发育与盆地形成具有密切的关系,南海北部主要表现为NE向张性断裂控制的沉积盆地;西部主要表现为NW向和近SN向走滑断裂控制的沉积盆地;南部比较复杂,张性、压性、剪性断裂都有发育,但以NE向的南沙海槽逆冲断裂及其控制的南沙海槽盆地最具代表性;东部主要指南海中央海盆,断裂和海底火山共同控制了该区上新世—第四纪沉积。

关键词: 中国南海, 板块边缘性质, 沉积盆地, 构造特征

Abstract:

This paper makes a comparative analysis on the structural characteristics of the main Cenozoic sedimentary basins of the South China Sea, based on the regional jointed survey data and combined with geotectonic setting research.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.. There are close relations between fault development and basin formation of the South China Sea. The northern South China Sea mainly displays N-E direction tension fractures and sedimentary basins under the control of the fractures; the western South China Sea mainly develops N-W direction and near S-N direction strike-slip faults and sedimentary basins under the control of the faults; the southern South China Sea is rather complicated, where tension, compression and shear faults exist but the N-E direction Nansha trough thrust fault and the Nansha Trough basin under the control of the thrust are the most representative; the eastern South China Sea refers to the central sea basin of the South China Sea here, in which fractures and submarine volcanoes control the Pliocene-Quaternary deposit

Key words: the South China Sea, nature of plate margin, sedimentary basin, structural characteristic

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