| 南海北部陆缘的磁异常特征及居里面深度 |
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| 引用本文： | 吴招才,高金耀,赵俐红,张涛,杨春国,王健.南海北部陆缘的磁异常特征及居里面深度[J].地球科学,2010(6). |
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| 作者姓名： | 吴招才 高金耀 赵俐红 张涛 杨春国 王健 |
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| 作者单位： | 国家海洋局海底科学重点实验室国家海洋局第二海洋研究所;山东科技大学;中国地质大学资源学院海洋科学与工程系; |
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| 基金项目： | 国家自然科学基金项目(No.41006035,40776036); 国家重点基础研究发展计划项目(No.2007CB411702); 我国近海海洋综合调查与评价专项(No.908-ZC-Ⅰ-06) |
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| 摘 要： | 为了研究南海北部张裂大陆边缘的地壳热结构,利用船载测量磁力数据,通过功率谱方法反演南海北部陆缘居里等温面,并结合深地震剖面、区域断裂及大地热流分布,讨论了深部热结构状态.结果显示研究区居里面深度在13～26km之间,在上下陆坡转换带处与莫霍面相交,北东向断裂多位于居里面梯度带上,北西向断裂多具有分割、错断的特点,居里面深度和大地热流值具有相关性.结果揭示了陆架、上陆坡地区磁性体可能主要位于上地壳和下地壳上部,下陆坡及洋壳区地壳与地幔顶部有被磁化的迹象.磁静区位于居里面上隆区边缘,F3断裂和F4断裂之间可能是残留古洋壳.潮汕凹陷和台西南盆地中央隆起是发生底侵的主要区域,F2断裂为其北界.
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| 关 键 词： | 南海 居里面深度 功率谱分析 磁异常 热流 |
Characteristic of Magnetic Anomalies and Curie Point Depth at Northern Continental Margin of the South China Sea |
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| WU Zhao-cai,GAO Jin-yao,ZHAO Li-hong,ZHANG Tao,YANG Chun-guo,WANG Jian .Key Laboratory of Submarine Geosciences of SOA,Second Institute of Oceanography,SOA,Hangzhou ,China .Faculty of Earth Resources,China University of Geosciences,Wuhan ,China .Sh,ong University of Science , Technology,Qingdao ,China.Characteristic of Magnetic Anomalies and Curie Point Depth at Northern Continental Margin of the South China Sea[J].Earth Science-Journal of China University of Geosciences,2010(6). |
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| Authors: | WU Zhao-cai GAO Jin-yao ZHAO Li-hong ZHANG Tao YANG Chun-guo WANG Jian Key Laboratory of Submarine Geosciences of SOA Second Institute of Oceanography SOA Hangzhou China Faculty of Earth Resources China University of Geosciences Wuhan China Sh ong University of Science Technology Qingdao China |
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| Institution: | WU Zhao-cai1,GAO Jin-yao1,ZHAO Li-hong1,3,ZHANG Tao1,YANG Chun-guo1,WANG Jian2 1.Key Laboratory of Submarine Geosciences of SOA,Second Institute of Oceanography,SOA,Hangzhou 310012,China 2.Faculty of Earth Resources,China University of Geosciences,Wuhan 430074,China 3.Shandong University of Science and Technology,Qingdao 266510,China |
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| Abstract: | In order to investigate thermal state of crust in northern continental margin of the South China Sea,we calculated the Curie point depths with the shipboard magnetic anomaly by employing the method of power-density spectrum analysis.Combining with the seismic section,faults,and the heat flow distribution,the deep thermal structure was discussed in the study area.The result shows that Curie point depths were between 13 and 26km.NE-directed faults were mostly distributed in the gradient belt of Curie point is... |
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| Keywords: | South China Sea Curie pointdepth spectral analysis magnetic anomaly heat flow |
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