| 南海西缘断裂带走滑特征及其形成机理初步研究 |
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| 引用本文： | 高红芳.南海西缘断裂带走滑特征及其形成机理初步研究[J].中国地质,2011,38(3):537-543. |
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| 作者姓名： | 高红芳 |
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| 作者单位： | 中国科学院南海海洋研究所边缘海重点实验室,广东广州510103;中国科学院研究生院,北京100080;广州海洋地质调查局,广东广州510760 |
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| 基金项目： | 国家专项海洋地质保障工程项目(GZH200800502)资助 |
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| 摘 要： | 南海西缘断裂带是南海西部最主要的构造要素,从北到南贯穿了该区主要的沉积盆地,具有走滑断裂的性质。由于不同地质时期走滑方向的不同,形成了不同的断层组合,主要表现为负花状构造和北东向、北西向两组雁列断层以及平面上双马尾状构造组合。主体断裂带以单条式为主,区段式活动特征明显。在南北盆地之间的构造转换带表现为负花状构造-犁式断裂-多米诺式反向调节正断层的组合。综合分析认为,南海西缘断裂是一组长期活动的断裂带,大规模走滑活动从中始新世至第四纪时期,主要为右旋走滑,应力以张扭作用为主;但是在中中新世末期,走滑方向曾经发生转变,为左旋走滑,转为压扭应力,造成区域隆升,导致地层被剥蚀,南海西部盆地现今沉积-构造格局基本形成。
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| 关 键 词： | 南海西缘断裂带 走滑断裂 分段式活动 构造转换带 |
A tentative discussion on strike-slipping character and formation mechanism of western-edge fault belt in South China Sea |
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| GAO Hong-fang.A tentative discussion on strike-slipping character and formation mechanism of western-edge fault belt in South China Sea[J].Chinese Geology,2011,38(3):537-543. |
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| Authors: | GAO Hong-fang |
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| Institution: | GAO Hong-fang1,2,3(1.CAS Key Laboratory of Marginal Sea Geology and South China Sea Institute of Oceanology,Chinese Academy of Sciences,Guangzhou 510301,Guangdong,China,2.Graduate University of Chinese Academy of Sciences,Beijing 100080,3.Guangzhou Marine Geological Survey,Guangzhou 510760,China) |
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| Abstract: | The western-edge fault belt is the most dominating structure element in the west of South China Sea.It runs through the main sedimentary basins from north to south and has the property of strike-slip fault.The western-edge fault belt forms different arrangements of faults because of diverse strike-slipping directions at various geological times.Faults arrangements consist of negative flower structure,two groups en-echelon faults of northeast and northwest strike and double horse-tail shaped structure associ... |
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| Keywords: | western-edge fault belt of South China Sea strike-slip fault segmentation transform belt |
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