| 南海北部东沙古隆起的综合地球物理解释 |
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| 引用本文： | 栾锡武,刘鸿,彭学超.南海北部东沙古隆起的综合地球物理解释[J].地球物理学报,2011,54(12):3217-3232. |
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| 作者姓名： | 栾锡武 刘鸿 彭学超 |
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| 作者单位： | 1. 国土资源部海洋油气资源与环境地质重点试验室,青岛 266071;
2. 青岛海洋地质研究所,青岛 266071;
3. 中国科学院研究生院,北京 100049;
4. 中国科学院海洋研究所海洋地质与环境重点实验室,青岛 266071;
5. 广州海洋地质调查局,广州 510760 |
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| 基金项目： | 国家重点基础研究发展计划(973计划) |
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| 摘 要： | 通过对南海东北陆缘地震和重磁资料的综合地球物理解释,将原来东沙隆起细化为东沙古隆起和东沙隆起两部分.指出,东沙古隆起呈条带状分布于南海北部陆架外缘,长约550 km,宽约60 km,为一个和珠一坳陷、珠二坳陷、台湾岛隆起等构造单元级别相当的一个构造地质体.其地层的层状结构保存清楚,显示没有岩浆侵入、刺穿的现象发生.东沙...
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| 关 键 词： | 东沙古隆起 正值高磁异常带 底侵 |
| 收稿时间： | 2011-04-06 |
The geophysical interpretation of a Dongsha ancient uplift on the northern margin of South China Sea |
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| LUAN Xi-Wu
,
LIU Hong
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PENG Xue-Chao.The geophysical interpretation of a Dongsha ancient uplift on the northern margin of South China Sea[J].Chinese Journal of Geophysics,2011,54(12):3217-3232. |
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| Authors: | LUAN Xi-Wu LIU Hong PENG Xue-Chao |
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| Institution: | 1. Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology,Ministry of Land and Resources, Qingdao 266071,China;
2. Qingdao Institute of Marine Geology,Qingdao 266071,China;
3. Graduate University,Chinese Academy of Sciences,Beijing 100049,China;
4. Key Laboratory of Marine Geology and Environment,Institute of Oceanology, Chinese Academy of Sciences,Qingdao 266071,China;
5. Guangzhou Marine Geological Survey, Guangzhou 510760, China |
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| Abstract: | Based on the interpretation of seismic profiles, an ancient uplift belt was distinguished along the northern margin of South China Sea. This belt is striking in northeastern direction and about 550 km in length and 60 km in width. This belt is coincided well in shape with a high positive magnetic anomaly zone on the northern margin of South China Sea. So, the paper believed that this ancient uplift belt is the origin of the high positive magnetic zone. Dongsha ancient uplift belt was a subduction related arc belt. Due to the subduction, the magma intrusion happened under the arc belt. And due to a short duration of the subduction, the intrusion only happened at the deeper part of the arc belt. So the magma accumulated and solided at the deeper part of the arc belt and acquired high positive magnetic. |
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| Keywords: | Dongsha ancient uplift High positive magnetic anomaly belt Magma intrusion |
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