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Fault distribution and formation mechanism of a magnetic quiet zone in the northern South China Sea
Liu, H.1,2; Luan, X. W.1,2; Guo, L. L.3; Yue, B. J.1,2; Zhang, L.4; Ran, W. M.1,3; Pan, J.1,2
2016-08-01
发表期刊GEOLOGICAL JOURNAL
卷号51页码:331-345
文章类型Article
摘要A magnetic quiet zone (MQZ) is located in the ocean-continent transition zone in the northern South China Sea (SCS), according to T magnetic anomaly data. Features of the gravity and magnetic anomalies in the MQZ are discussed by the multi-scale wavelet decomposition method. Comprehensive boundary identification and fault analysis by analytic signal and normalized total horizontal derivative methods achieve some good effects in the northern SCS. The inversion results suggest a deep magnetic basement, a shallow Curie isothermal interface and thin magnetic layers. The average depth of the Curie isothermal interface is about 14-28km in the northern SCS, and the thickness of the magnetic layer is about 6-10km in the MQZ. The formation mechanism of the MQZ is discussed, and the thinning of the magnetic layer is considered as the origin of the MQZ in the northern SCS. The deep hot mantle materials were upwelled during the extension of the SCS, and the magnetic layer was demagnetized. In addition, the magnetic anomaly caused by thick Mesozoic sediments was very weak, and the NW-SE-trending faults made the magnetic bodies fragmental. The distribution of major faults is consistent with the fluctuating changes of the Curie isothermal interface, and the faults in the MQZ are the upward intrusion channels of the deep hot materials. Copyright (c) 2016 John Wiley & Sons, Ltd.
关键词Magnetic Quiet Zone Ocean-continent Transition Zone Northern South China Sea Boundary Identification Curie Isothermal Interface
DOI10.1002/gj.2844
收录类别SCI
语种英语
WOS记录号WOS:000383513600024
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文献类型期刊论文
版本出版稿
条目标识符http://ir.qdio.ac.cn/handle/337002/135771
专题海洋地质与环境重点实验室
作者单位1.Qingdao Inst Marine Geol, Key Lab Marine Hydrocarbon Resources & Environm G, Qingdao, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao, Peoples R China
3.Ocean Univ China, Coll Marine Geosci, Qingdao, Peoples R China
4.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao, Peoples R China
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Liu, H.,Luan, X. W.,Guo, L. L.,et al. Fault distribution and formation mechanism of a magnetic quiet zone in the northern South China Sea[J]. GEOLOGICAL JOURNAL,2016,51:331-345.
APA Liu, H..,Luan, X. W..,Guo, L. L..,Yue, B. J..,Zhang, L..,...&Pan, J..(2016).Fault distribution and formation mechanism of a magnetic quiet zone in the northern South China Sea.GEOLOGICAL JOURNAL,51,331-345.
MLA Liu, H.,et al."Fault distribution and formation mechanism of a magnetic quiet zone in the northern South China Sea".GEOLOGICAL JOURNAL 51(2016):331-345.
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