| 南海西缘结合带的贯通性 |
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| 引用本文： | 刘海龄,姚永坚,沈宝云,蔡周荣,张智武,许鹤华,王淑红,魏常兴,陈建明.南海西缘结合带的贯通性[J].地球科学,2015,40(4):615-632. |
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| 作者姓名： | 刘海龄 姚永坚 沈宝云 蔡周荣 张智武 许鹤华 王淑红 魏常兴 陈建明 |
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| 作者单位： | 1.中国科学院南海海洋研究所边缘海地质重点实验室, 广东广州 510301 |
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| 基金项目： | 国家自然科学基金项目(Nos.41276048,91328205,41476039);核资源与环境省部共建国家重点实验室培育基地(东华理工大学)开放基金计划项目(No.NRE1302);“中国海及邻域地质地球物理及地球化学系列图”项目(No.GZH200900504-WX02);国土资源部油气资源研究中心项目(No.GT-YQ-QQ-2008-1-02);海洋保障工程(No.1212011220116) |
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| 摘 要： | 为了探讨南海西缘结合带的构造贯通性, 在系统分析其地质-地球物理资料的基础上, 剖析了该带的分段性和深-浅部构造几何学特征, 对该带的哀牢山-红河-越东-万纳-卢帕尔各段进行了全面的构造几何学及构造运动学上的对比分析, 提出该带是一条相互贯通的走滑断裂系统, 其各部分在构造几何学上符合走滑构造的基本构架, 构造运动学上具有同时性, 浅部各段具有共同相连的深部的"根", 表现出明显的时空上的贯通性与构造上的一致性.
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| 关 键 词： | 南海西缘 构造结合带 构造贯通性 走滑构造系统 海洋地质 |
| 收稿时间： | 2015-01-08 |
On Linkage of Western Boundary Faults of the South China Sea |
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| Liu Hailing;Yao Yongjian;Shen Baoyun;Cai Zhourong;Zhang Zhiwu;Xu Hehua;Wang Shuhong;Wei Changxing;Chen Jianming.On Linkage of Western Boundary Faults of the South China Sea[J].Earth Science-Journal of China University of Geosciences,2015,40(4):615-632. |
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| Authors: | Liu Hailing;Yao Yongjian;Shen Baoyun;Cai Zhourong;Zhang Zhiwu;Xu Hehua;Wang Shuhong;Wei Changxing;Chen Jianming |
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| Affiliation: | Liu Hailing;Yao Yongjian;Shen Baoyun;Cai Zhourong;Zhang Zhiwu;Xu Hehua;Wang Shuhong;Wei Changxing;Chen Jianming;Key Laboratory of Marginal Sea Geology of South China Sea Institute of Oceanology,Chinese Academy of Sciences;State Key Laboratory Breeding Base of Nuclear Resources and Environment,East China Institute of Technology;Guangzhou Marine Geological Survey;South China Sea Institute of Oceanology,CAS;School of Marine Sciences,Sun Yat-sen University;China National Offshore Oil Corporation; |
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| Abstract: | There are two pending key problems in research on western boundary faults (WBF) of South China Sea (SCS). One is itself structural-geometric linkage of the WBF of the SCS, that is whether there is a united dynamic boundary along the WBF of the SCS. The other one is dynamic consanguinity with Ailaoshan-Red River tectonic belt and Lupar line in region, that is, as a dynamic boundary, between which blocks the united dynamic boundary exists. For the sake of these two problems, the authors comparatively analyzed the structural geometry and structural kinetics of the major sections of the WBF, such as the Ailao-Red River (ARR)-East Vietnam (EV)-Wan'na (WN)-Lupar line (AEWL for short), based on the comprehensive analyses of geological, geophysical and geochemical data of the western margin area of the SCS. The AEWL is considered a mutual structural-geometric link-up system of strike-slip faults.The AEWL can be divided into three first-order segments: northern segment i.e.the ARR strike-slip fault zone; middle segment from mouth of Red River to the southwestern end of Southwest sub-basin of the SCS, through the EV, characterised by strike-slip and pull-apart; and southern segment along the east boundary fault of Wan'an basin and southward linking with Lupar line in northwestern Kalimantan Island, characterised by an extension-contract-type dextral strike-slip duplex system.Each first-order segment can be further divided into several second-order segments.Then combined with comparatively analyses on geological evolution history of blocks in the region and the analyses on the Cenozoic spreading model of the SCS lithosphere, a dynamic model of the WBF of the SCS during the formation process of the SCS was instituted, and a geological model, which suggests the ARR ran along the No.1 fault of eastern boundary fault of Yinggehai basin after entering the SCS, through Zhongjian ridge-EV-WN-Lupar line, and stopped at the west end of Bacu subduction-collision zone which results from southward subduction of paleo-SCS, was proposed. The reasonableness of the geological model was examined through the results of elasticity-medium-model numerical simulation. |
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| Keywords: | west margin of the South China Sea tectonic combining zone strike-slip structure system tectonic linkage marine geology |
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