| 南海共轭大陆边缘构造属性的综合地球物理研究 |
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| 引用本文： | 郝天珧,徐亚,孙福利,游庆瑜,吕川川,黄松,丘学林,胡卫剑,赵明辉.南海共轭大陆边缘构造属性的综合地球物理研究[J].地球物理学报,2011,54(12):3098-3116. |
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| 作者姓名： | 郝天珧 徐亚 孙福利 游庆瑜 吕川川 黄松 丘学林 胡卫剑 赵明辉 |
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| 作者单位： | 1. 中国科学院地质与地球物理研究所,中国科学院油气资源研究重点实验室,北京 100029;
2. 中国科学院南海海洋研究所,中国科学院边缘海地质重点实验室,广州 510301 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)，国家自然科学基金，中国科学院创新青年人才领域前沿项目联合资助 |
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| 摘 要： | 利用南海最新的重磁资料,在岩石物性分析和全海域分带变倾角化极磁异常反演磁性基底分布的基础上,选择6条典型剖面拟合反演其密度与磁性结构,在此基础上进行了深部结构的对比分析.反演中尽可能以海底地震仪探测数据(OBS)、多道地震等结果作为约束,其中FF'剖面层速度分析是利用“南海大陆边缘动力学及油气资源潜力”973项目200...
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| 关 键 词： | 南海 共轭大陆边缘 物性拟合剖面 构造属性 综合地球物理解释 |
| 收稿时间： | 2011-07-19 |
Integrated geophysical research on the tectonic attribute of conjugate continental margin of South China Sea |
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| HAO Tian-Yao
,
XU Ya
,
SUN Fu-Li
,
YOU Qing-Yu
,
L Chuan-Chuan
,
HUANG Song
,
QIU Xue-Lin
,
HU Wei-Jian
,
ZHAO Ming-Hui.Integrated geophysical research on the tectonic attribute of conjugate continental margin of South China Sea[J].Chinese Journal of Geophysics,2011,54(12):3098-3116. |
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| Authors: | HAO Tian-Yao XU Ya SUN Fu-Li YOU Qing-Yu L Chuan-Chuan HUANG Song QIU Xue-Lin HU Wei-Jian ZHAO Ming-Hui |
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| Institution: | 1. Institute of Geology and Geophysics,Chinese Academy of Sciences, Key Laboratory of Petroleum Resources Research, Chinese Academy of Sciences, Beijing 100029, China;
2. South China Sea Institute of Oceangraphy,Chinese Academy of Sciences, Key Laboratory of Marginal Sea Geology, Chinese Academy of Sciences, Guangzhou 510301, China |
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| Abstract: | In this paper, the density and magnetic structure of six profiles in South China Sea was inversed based on the latest potential field data and the rock physical property analysis. The constraint information from the ocean bottom seismometer (OBS) data and multi-channel seismic (MCS) results was used in the inversion process. And the FF' profile used the latest MCS data colleted in 2009 by the 973 project. Based on the MCS data, the interval velocity is computed and the structure model is used for the gravity modeling. Based on the deep structure analysis and the density/magnetic structure of the six profiles in this paper, the tectonic attribution of the northern and the southern margins of the South China Sea are more like non-volcanic continental margin. There exists high density layer in the lower crust accompanied with active magma activity to the east of CC' profile in north margin of SCS. But it is lack of the seaward dipping reflectors in this region. So we deduce that the high density layer in lower crust is the result of splitting of the continental margin after the sea floor spreading, which is same as the magmatic rocks in shallow layer. The magnetic basement and the deep structure of the Zhongsha Uplift and Liyue basin are quiet similar. It was deduced that they were the same block before the pull of sea basin. They are a pair of conjugate points of the northern and southern margins of the South China Sea. The integrated geophysical interpretation of southern margin of southwest sub-sea basin indicated that the Mesozoic group can be found near the base of slope but they may be not continuous. |
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| Keywords: | South China Sea Conjugate continental margin Tectonic attribute Integrated geophysical interpretation |
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