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| 试论南海新构造运动的时限及其差异性 | |
| 引用本文： | 詹文欢,朱照宇,孙龙涛,孙宗勋,姚衍桃,丘学林.试论南海新构造运动的时限及其差异性[J].地质学报,2006,80(4):491-496. |
| 作者姓名： | 詹文欢 朱照宇 孙龙涛 孙宗勋 姚衍桃 丘学林 |
| 作者单位： | 1. 中国科学院南海海洋研究所,广州,510301;中国科学院边缘海地质重点实验室,广州,510301 2. 中国科学院边缘海地质重点实验室,广州,510301;中国科学院广州地球化学研究所,510640 3. 中国科学院南海海洋研究所,广州,510301 |
| 基金项目： | 国家自然科学基金项目(编号40476026,40272077)，广东省自然科学基金项目(编号04001309)联合资助的成果。 |
| 摘 要： | 根据南海地形地貌、地质地球物理剖面资料、重磁场异常、地壳结构特征和岩石圈动力学环境,对南海新构造运动起始时限进行了新的解释。传统的观点是把新近纪作为新构造下限,依此观点,南海地区在古近系、新近系之间应为不整合接触,但在此阶段并没有发生重大变革的构造事件。而符合南海地区准平原化阶段的时代是在中中新世末至晚中新世(N12/N13)之间,在此时段普遍存在区域构造不整合接触和地层缺失、断裂、变形及火山活动等构造变动事件。本文把中中新世末作为南海地区新构造运动开始的时间。通过对南海地区中中新世末至晚中新世之间的构造变动事件的对比研究,可以看出新构造运动在不同地点有时间和强度的差异性、构造运动的差异性、沉积相和沉积建造的差异性等特征。 |
| 关 键 词： | 新构造运动 时限 差异性 南海 |
| 修稿时间： | 2005年10月25 |
The Epoch and Diversities of Neotectonic Movement in the South China Sea |
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| ZHAN Wenhuan,ZHU Zhaoyu,SUN Longtao,SUN Zongxun,YAO Yantao ,QIU Xuelin, South China Sea Institute of Oceanology,Chinese Academy of Sciences,Guangzhou, Key Laboratory of Marginal Sea Geology,Chinese Academy of Sciences.The Epoch and Diversities of Neotectonic Movement in the South China Sea[J].Acta Geologica Sinica,2006,80(4):491-496. | |
| Authors: | ZHAN Wenhuan ZHU Zhaoyu SUN Longtao SUN Zongxun YAO Yantao QIU Xuelin South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou Key Laboratory of Marginal Sea Geology Chinese Academy of Sciences |
| Abstract: | Based on the topography, geophysical profiles, gravity and magnetic anomalies, structural characteristics and crustal dynamic environment, the paper illustrates the epoch and diversities of the neotectonic movement in the South China Sea. The traditional point looks the late Tertiary as the beginning of the neotectonic movement in the South China Sea. So as this view, the stratum between early and late Tertiary should be unconformable. But there are no many tectonic events during this period. From middle Miocene to late Miocene there is a stage of peneplanation in the South China Sea and there are many tectonic events in this area, such as stratum unconformable contact, faults, deformation and magmatism. So we think the neotectonic movement in the South China Sea begins in middle Miocene. By contrasting the tectonic event between the middle Miocene to late Miocene in the South China Sea, we can see the neotectonic movement has distinct characteristics in different area. |
| Keywords: | the epoch diversities neotectonic movement the South China Sea |
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