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Multiple Emplacement and Exhumation History of the Late Mesozoic Dayunshan-Mufushan Batholith in Southeast China and Its Tectonic Significance: 2. Magnetic Fabrics and Gravity Survey

文献类型：期刊论文

作者Ji, Wenbin1,2; Chen, Yan2; Chen, Ke3; Wei, Wei1,2; Faure, Michel2; Lin, Wei1
刊名JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
出版日期2018
卷号123期号:1页码:711-731
关键词south China Dayunshan-Mufushan batholith Late Mesozoic tectonomagmatism pluton emplacement magnetic fabrics gravity survey
ISSN号2169-9313
DOI10.1002/2017JB014598
文献子类Article
英文摘要The Late Mesozoic magmatic province is a prominent feature of the South China Block (SCB). However, the tectonic regimes associated with the magmatism are still elusive. A combined anisotropy of magnetic susceptibility and gravity study has been carried out to determine the fabric patterns and shape at depth of the Dayunshan-Mufushan composite batholith in the north-central SCB. This is a companion paper to Part 1 that presented the structural and geochronological data of this batholith. The magnetic fabrics in the batholith interior predominantly reflect magma flow structures. Two distinct patterns of the magnetic lineations are defined, around NNE-SSW and WNW-ESE trends for the early-stage and late-stage intrusions of the batholith, respectively. The gravity survey reveals that the early-stage intrusion has a main feeder zone located below its northern part, while several linear feeder zones trending NNE-SSW are inferred for the late-stage intrusion. Integrating all results, a two-stage construction of the batholith with distinct tectonic regimes has been established. It is concluded that the early-stage intrusion experienced a southward magma transport during its emplacement, partially assisted by far-field compression from the north at ca. 150Ma. Conversely, the emplacement and exhumation of the late-stage intrusion was accommodated by a NW-SE crustal stretching involving a lateral magma expansion above the multiple feeder zones (likely corresponding to extensional fractures) and ductile shearing during 132-95Ma localized mainly along the Dayunshan detachment fault. Finally, we discuss the geodynamic linkage between the paleo-Pacific subduction and the Late Mesozoic tectonomagmatism in the SCB.
WOS关键词METAMORPHIC CORE COMPLEXES ; PALEO-PACIFIC SUBDUCTION ; QINGYANG-JIUHUA MASSIF ; U-PB ZIRCON ; SE CHINA ; EASTERN CHINA ; NORTH CHINA ; INTRACONTINENTAL OROGEN ; EXTENSIONAL TECTONICS ; GEODYNAMIC IMPLICATIONS
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000426132600041
出版者AMER GEOPHYSICAL UNION
资助机构MOST of China(2016YFC0600401 ; MOST of China(2016YFC0600401 ; MOST of China(2016YFC0600401 ; MOST of China(2016YFC0600401 ; NSFC(41502202 ; NSFC(41502202 ; NSFC(41502202 ; NSFC(41502202 ; 2016YFC0600102) ; 2016YFC0600102) ; 2016YFC0600102) ; 2016YFC0600102) ; 41225009) ; 41225009) ; 41225009) ; 41225009) ; MOST of China(2016YFC0600401 ; MOST of China(2016YFC0600401 ; MOST of China(2016YFC0600401 ; MOST of China(2016YFC0600401 ; NSFC(41502202 ; NSFC(41502202 ; NSFC(41502202 ; NSFC(41502202 ; 2016YFC0600102) ; 2016YFC0600102) ; 2016YFC0600102) ; 2016YFC0600102) ; 41225009) ; 41225009) ; 41225009) ; 41225009) ; MOST of China(2016YFC0600401 ; MOST of China(2016YFC0600401 ; MOST of China(2016YFC0600401 ; MOST of China(2016YFC0600401 ; NSFC(41502202 ; NSFC(41502202 ; NSFC(41502202 ; NSFC(41502202 ; 2016YFC0600102) ; 2016YFC0600102) ; 2016YFC0600102) ; 2016YFC0600102) ; 41225009) ; 41225009) ; 41225009) ; 41225009) ; MOST of China(2016YFC0600401 ; MOST of China(2016YFC0600401 ; MOST of China(2016YFC0600401 ; MOST of China(2016YFC0600401 ; NSFC(41502202 ; NSFC(41502202 ; NSFC(41502202 ; NSFC(41502202 ; 2016YFC0600102) ; 2016YFC0600102) ; 2016YFC0600102) ; 2016YFC0600102) ; 41225009) ; 41225009) ; 41225009) ; 41225009)
源URL[http://ir.iggcas.ac.cn/handle/132A11/82784]  
专题中国科学院地质与地球物理研究所
通讯作者Lin, Wei
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China
2.Univ Orleans, Inst Sci Terre Orleans, UMR 7327, Orleans, France
3.China Geol Survey, Oil & Gas Survey, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Ji, Wenbin,Chen, Yan,Chen, Ke,et al. Multiple Emplacement and Exhumation History of the Late Mesozoic Dayunshan-Mufushan Batholith in Southeast China and Its Tectonic Significance: 2. Magnetic Fabrics and Gravity Survey[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2018,123(1):711-731.
APA Ji, Wenbin,Chen, Yan,Chen, Ke,Wei, Wei,Faure, Michel,&Lin, Wei.(2018).Multiple Emplacement and Exhumation History of the Late Mesozoic Dayunshan-Mufushan Batholith in Southeast China and Its Tectonic Significance: 2. Magnetic Fabrics and Gravity Survey.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,123(1),711-731.
MLA Ji, Wenbin,et al."Multiple Emplacement and Exhumation History of the Late Mesozoic Dayunshan-Mufushan Batholith in Southeast China and Its Tectonic Significance: 2. Magnetic Fabrics and Gravity Survey".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 123.1(2018):711-731.

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来源：地质与地球物理研究所

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