| 南海岩石圈破裂方式与扩张过程的三维物理模拟 |
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| 引用本文： | 孙珍,孙龙涛,周蒂,蔡东升,李绪深,钟志洪,姜建群,樊浩.南海岩石圈破裂方式与扩张过程的三维物理模拟[J].地球科学,2009,34(3):435-447. |
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| 作者姓名： | 孙珍 孙龙涛 周蒂 蔡东升 李绪深 钟志洪 姜建群 樊浩 |
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| 作者单位： | 1.中国科学院边缘海地质重点实验室 南海海洋研究所 广东广州 510301 |
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| 基金项目： | 国家重点基础研究发展规划(973计划)，中国科学院知识创新工程重要方向性项目，国家自然科学基金，中国科学院南海海洋研究所知识创新工程领域前沿项目，中国科学院海洋地质与环境重点实验室开放课题 |
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| 摘 要： | 南海的形成演化一直是国内外关注的热点之一.为了揭示南海的构造演化过程, 分析对比了3组物理模拟实验.实验结果表明, 断裂样式和裂谷带的走向与岩石圈的初始热流变结构密切相关.对比模拟结果与陆缘的断层样式, 推测在张裂初期, 陆坡区比陆架区具有相对热减薄的岩石圈, 从而导致不同构造位置上发育不同的裂陷特征.受下地壳和软流圈韧性流动的影响, 断层越是靠近扩张区, 倾角变得越平缓.实验揭示, 破裂首先以点状出现, 这些点不断扩大并互相连接形成连续的扩张区.共轭边缘常具有对称的形状, 向海盆方向对凹或者对凸.当离散边界附近有刚性块体时, 扩张区域的边界会明显受到地块边缘形态的影响.通过模拟实验, 推测破裂过程可能以较粘性的方式进行.西北次海盆的发育可能是沿着中-西沙地块北缘深裂陷槽破裂的结果.
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| 关 键 词： | 南海 破裂方式 形成演化 三维物理模拟 |
| 收稿时间： | 2008-12-21 |
Discussion on the South China Sea Evolution and Lithospheric Breakup through 3D Analogue Modeling |
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| SUN Zhen,SUN Long-tao,ZHOU Di,CAI Dong-sheng,LI Xu-shen,ZHONG Zhi-hong,JIANG Jian-qun,FAN Hao .CAS Key Laboratory of Marginal Sea Geology,South China Sea Institute of Oceanology,Guangzhou ,China .Zhanjiang Branch of CNOOC,Zhanjiang ,China .Dept.of Science , Technology,Shenzhen Branch of CNOOC,Guangzhou ,China .Hainan Oil & Gas Exploration Company,Liaohe Oilfield,PetroChina,Panjin ,China.Discussion on the South China Sea Evolution and Lithospheric Breakup through 3D Analogue Modeling[J].Earth Science-Journal of China University of Geosciences,2009,34(3):435-447. |
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| Authors: | SUN Zhen SUN Long-tao ZHOU Di CAI Dong-sheng LI Xu-shen ZHONG Zhi-hong JIANG Jian-qun FAN Hao CAS Key Laboratory of Marginal Sea Geology South China Sea Institute of Oceanology Guangzhou China Zhanjiang Branch of CNOOC Zhanjiang China Deptof Science Technology Shenzhen Branch of CNOOC Guangzhou China Hainan Oil & Gas Exploration Company Liaohe Oilfield PetroChina Panjin China |
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| Institution: | SUN Zhen1,SUN Long-tao1,ZHOU Di1,CAI Dong-sheng2,LI Xu-shen2,ZHONG Zhi-hong3,JIANG Jian-qun4,FAN Hao4 1.CAS Key Laboratory of Marginal Sea Geology,South China Sea Institute of Oceanology,Guangzhou 510301,China 2.Zhanjiang Branch of CNOOC,Zhanjiang 524057,China 3.Dept.of Science , Technology,Shenzhen Branch of CNOOC,Guangzhou 510240,China 4.Hainan Oil & Gas Exploration Company,Liaohe Oilfield,PetroChina,Panjin 124010,China |
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| Abstract: | The evolution of the South China Sea is one of the worldwide hot research spots.In order to investigate its evolution progress of tectonics,we compared three sets of analogue modeling experiments.Modeling experiments suggest that the fault patterns and orientation change of the rift zone were strongly related to the thermal situation and rheological stratification of the lithosphere.Comparing the modeling results with the fault patterns on the conjugate continental margin,we conjectured that the slope area ... |
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| Keywords: | South China sea breakup pattern tectonic evolution 3D analogue modeling |
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