| 南海陆缘伸展破裂过程中的构造迁移和盆地演化 |
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| 引用本文： | 罗盼,任建业,雷超.南海陆缘伸展破裂过程中的构造迁移和盆地演化[J].地质学报,2024,98(4):1101-1113. |
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| 作者姓名： | 罗盼 任建业 雷超 |
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| 作者单位： | 1) 中石化石油物探技术研究院有限公司，江苏南京,210013;2) 中国地质大学(武汉)海洋学院海洋地质资源湖北省重点实验室,湖北武汉,430074;2) 中国地质大学(武汉)海洋学院海洋地质资源湖北省重点实验室,湖北武汉,430074;3) 南方海洋科学与工程广东省实验室(广州),广东广州,511458;4) 中国地质大学(武汉)构造与油气资源教育部重点实验室,湖北武汉,430074 |
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| 基金项目： | 本文为国家自然科学基金项目(编号41830537)资助的成果 |
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| 摘 要： | 为了阐明南海由陆向洋的过渡带内构造活动的时间 空间迁移过程，本文以两条跨南海东部共轭被动陆缘和南海西南部共轭陆缘的两条长剖面为基础，进行精细的构造解释和分析，在南海洋陆转换带内确定了出Tb、SD、PD和Bi四个一级层序界面，并以这4个一层序界面为界，将南海陆缘划分为：早期断陷盆地(Tb—SD)、晚期拆离盆地(SD—PD)和断坳转换盆地(PD—Bi)。通过对同一剖面不同构造单元带内同构造地层的分析，发现构造活动时代由陆向洋逐渐变年轻；通过对比不同剖面同一构造单元带内的同构造地层发现，构造活动时代沿着海底扩张迁移的方向逐渐变年轻。因此，在南海扩张期间，岩石圈的伸展变形不仅表现为向洋方向的迁移，同时表现为向海底扩张方向的迁移。
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| 关 键 词： | 洋陆转换带 拆离盆地 同构造地层 构造迁移 |
| 收稿时间： | 2023/2/6 0:00:00 |
| 修稿时间： | 2023/4/23 0:00:00 |
Tectonic propagation and basin evolution during the extension and breakup of the South China Sea |
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| LUO Pan,REN Jianye,LEI Chao.Tectonic propagation and basin evolution during the extension and breakup of the South China Sea[J].Acta Geologica Sinica,2024,98(4):1101-1113. |
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| Authors: | LUO Pan REN Jianye LEI Chao |
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| Institution: | 1) SINOPEC Geophysical Research Institute Co, Ltd, Nanjing, Jiangsu 210013, China;2) Hubei Key Laboratory of Marine Geological Resources, China University of Geosciences, Wuhan, Hubei 430074, China;2) Hubei Key Laboratory of Marine Geological Resources, China University of Geosciences, Wuhan, Hubei 430074, China;3) Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, Guangdong 511458, China;4) Key Laboratory of Tectonics and Petroleum Resources, Ministry of Education, China University of Geosciences, Wuhan, Hubei 430074, China |
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| Abstract: | In order to clarify the time- space evolution of tectonic activities during the ocean continental transition, we analyse and interpret 2 long seismic lines which across the conjugate margin of South China Sea. Four first order interfaces have been recognized in the ocean continental transition of SCS: Tb, SD, PD and Bi. These 4 first order horizons separated the basins on continental margin into different proto- basins: the early rifted basin (Tb- SD), the later detachment basin (SD- PD), and the transfer basin (PD- Bi). Based on the comparison of syn- tectonic sequences in different domains in one seismic line, the tectonic activities from continent to ocean. As inferred from comparison, the syn- tectonic sequences in same domain between different lines, the tectonic activities get younger along the seafloor spreading direction. Thus, during the seafloor spreading stage, the lithosphere extension deformation propagated not only from continent to ocean, but also along the seafloor spreading direction. |
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| Keywords: | ocean continent transition syn- tectonic detachment basin tectonic propagates |
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