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A multidisciplinary study on the emplacement mechanism of the Qingyang-Jiuhua Massif in Southeast China and its tectonic b Part I: Structural geology, AMS and paleomagnetism

文献类型：期刊论文

作者Wei, W.1,2,3,4,5; Chen, Y.2,3,4; Faure, M.2,3,4; Shi, Y. H.6; Martelet, G.4; Hou, Q. L.; Lin, W.5; Le Breton, N.2,3,4; Wang, Q. C.5
刊名JOURNAL OF ASIAN EARTH SCIENCES
出版日期2014-06-01
卷号86页码:76-93
关键词South China Block Pluton emplacement mechanism Anisotropy of magnetic susceptibility Paleomagnetism Cretaceous tectonic extension
ISSN号1367-9120
DOI10.1016/j.jseaes.2013.06.003
文献子类Article
英文摘要During the Cretaceous, the South China Block (SCB) experienced a widely distributed extensional event including numerous plutons emplacement and basin opening. Investigations on the tectonic regime coeval with pluton emplacement, and emplacement mechanism of the pluton remain relatively rare in the SCB. In order to address these questions, a multidisciplinary approach, including field structural and petrographic observations, anisotropy magnetic susceptibility (AMS) and paleomagnetic analyses, was carried out on the Qingyang-Jiuhua granitic massif which intrudes into the Lower Yangtze fold belt in the northeastern part of the SCB. The Qingyang-Jiuhua massif is coniposed of the granodioritic Qingyang and monzogranitic Jiuhua plutons dated by zircon U-Pb method at ca. 142 Ma, and ca. 131 Ma, respectively. Our structural observations show that the intrusion of the Qingyang-Jiuhua massif does not modify the fold strike. A weak ductile deformation of the country rocks and granitoid can be only observed in the boundary zone with limited contact metamorphism. In the contact aureole of the massif, the foliation follows the pluton contour, and the mineral lineation is rare. When present, it exhibits a down-dip attitude. Field and microstructural observations indicate isotropic magmatic textures in most parts of the massif. The AMS analysis of 93 sites reveals weak values for the anisotropy degree (Pi < 1.2) and oblate magnetic fabric dominance (T> 0) for most of the measured samples. Two principal foliation patterns are identified: horizontal foliations in the center of the plutons, and vertical foliations on the boundaries. Magnetic lineation strike is largely scattered, and weakly inclined at the scale of the entire massif. The paleomagnetic investigations indicate that (a) the younger Jiuhua pluton did not produce a remagnetization in the older Qingyang pluton, (b) no relative movement can be observed between these two plutons, (c) the entire massif did not experience any important relative movement with respect to South China, considering the paleomagnetic uncertainties. Integrating the newly obtained results with previous observations, our study favors a permissive emplacement mechanism for the two plutons, i.e. vertical magma intrusion into an opening space controlled by the NW-SE brittle stretching of the upper crust, which is in agreement with a weak extensional regional tectonic framework of the SCB. (C) 2013 Elsevier Ltd. All rights reserved.
WOS关键词TAN-LU FAULT ; MULTIPLE MAGMATIC FABRICS ; EASTERN CHINA ; MAGNETIC-SUSCEPTIBILITY ; YANGTZE-RIVER ; DABIE OROGEN ; EXTENSIONAL TECTONICS ; MESOZOIC GRANITES ; JIANGXI PROVINCE ; NORTHEAST BRAZIL
WOS研究方向Geology
语种英语
WOS记录号WOS:000335431600006
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构Sino-European Joint Doctoral Promotion Program (DPP) of the Chinese Academy of Sciences ; Sino-European Joint Doctoral Promotion Program (DPP) of the Chinese Academy of Sciences ; Sino-European Joint Doctoral Promotion Program (DPP) of the Chinese Academy of Sciences ; Sino-European Joint Doctoral Promotion Program (DPP) of the Chinese Academy of Sciences ; Chinese National 973 Project(2009CB825008) ; Chinese National 973 Project(2009CB825008) ; Chinese National 973 Project(2009CB825008) ; Chinese National 973 Project(2009CB825008) ; National Natural Science Foundation of China(41225009) ; National Natural Science Foundation of China(41225009) ; National Natural Science Foundation of China(41225009) ; National Natural Science Foundation of China(41225009) ; Innovative Project of the Chinese Academy of Sciences(KZCX1-YW-15-1) ; Innovative Project of the Chinese Academy of Sciences(KZCX1-YW-15-1) ; Innovative Project of the Chinese Academy of Sciences(KZCX1-YW-15-1) ; Innovative Project of the Chinese Academy of Sciences(KZCX1-YW-15-1) ; Major National Science and Technology Project(2011ZX05008-001) ; Major National Science and Technology Project(2011ZX05008-001) ; Major National Science and Technology Project(2011ZX05008-001) ; Major National Science and Technology Project(2011ZX05008-001) ; Ministry of Land and Resources Grant(201211024-04) ; Ministry of Land and Resources Grant(201211024-04) ; Ministry of Land and Resources Grant(201211024-04) ; Ministry of Land and Resources Grant(201211024-04) ; Sino-European Joint Doctoral Promotion Program (DPP) of the Chinese Academy of Sciences ; Sino-European Joint Doctoral Promotion Program (DPP) of the Chinese Academy of Sciences ; Sino-European Joint Doctoral Promotion Program (DPP) of the Chinese Academy of Sciences ; Sino-European Joint Doctoral Promotion Program (DPP) of the Chinese Academy of Sciences ; Chinese National 973 Project(2009CB825008) ; Chinese National 973 Project(2009CB825008) ; Chinese National 973 Project(2009CB825008) ; Chinese National 973 Project(2009CB825008) ; National Natural Science Foundation of China(41225009) ; National Natural Science Foundation of China(41225009) ; National Natural Science Foundation of China(41225009) ; National Natural Science Foundation of China(41225009) ; Innovative Project of the Chinese Academy of Sciences(KZCX1-YW-15-1) ; Innovative Project of the Chinese Academy of Sciences(KZCX1-YW-15-1) ; Innovative Project of the Chinese Academy of Sciences(KZCX1-YW-15-1) ; Innovative Project of the Chinese Academy of Sciences(KZCX1-YW-15-1) ; Major National Science and Technology Project(2011ZX05008-001) ; Major National Science and Technology Project(2011ZX05008-001) ; Major National Science and Technology Project(2011ZX05008-001) ; Major National Science and Technology Project(2011ZX05008-001) ; Ministry of Land and Resources Grant(201211024-04) ; Ministry of Land and Resources Grant(201211024-04) ; Ministry of Land and Resources Grant(201211024-04) ; Ministry of Land and Resources Grant(201211024-04) ; Sino-European Joint Doctoral Promotion Program (DPP) of the Chinese Academy of Sciences ; Sino-European Joint Doctoral Promotion Program (DPP) of the Chinese Academy of Sciences ; Sino-European Joint Doctoral Promotion Program (DPP) of the Chinese Academy of Sciences ; Sino-European Joint Doctoral Promotion Program (DPP) of the Chinese Academy of Sciences ; Chinese National 973 Project(2009CB825008) ; Chinese National 973 Project(2009CB825008) ; Chinese National 973 Project(2009CB825008) ; Chinese National 973 Project(2009CB825008) ; National Natural Science Foundation of China(41225009) ; National Natural Science Foundation of China(41225009) ; National Natural Science Foundation of China(41225009) ; National Natural Science Foundation of China(41225009) ; Innovative Project of the Chinese Academy of Sciences(KZCX1-YW-15-1) ; Innovative Project of the Chinese Academy of Sciences(KZCX1-YW-15-1) ; Innovative Project of the Chinese Academy of Sciences(KZCX1-YW-15-1) ; Innovative Project of the Chinese Academy of Sciences(KZCX1-YW-15-1) ; Major National Science and Technology Project(2011ZX05008-001) ; Major National Science and Technology Project(2011ZX05008-001) ; Major National Science and Technology Project(2011ZX05008-001) ; Major National Science and Technology Project(2011ZX05008-001) ; Ministry of Land and Resources Grant(201211024-04) ; Ministry of Land and Resources Grant(201211024-04) ; Ministry of Land and Resources Grant(201211024-04) ; Ministry of Land and Resources Grant(201211024-04) ; Sino-European Joint Doctoral Promotion Program (DPP) of the Chinese Academy of Sciences ; Sino-European Joint Doctoral Promotion Program (DPP) of the Chinese Academy of Sciences ; Sino-European Joint Doctoral Promotion Program (DPP) of the Chinese Academy of Sciences ; Sino-European Joint Doctoral Promotion Program (DPP) of the Chinese Academy of Sciences ; Chinese National 973 Project(2009CB825008) ; Chinese National 973 Project(2009CB825008) ; Chinese National 973 Project(2009CB825008) ; Chinese National 973 Project(2009CB825008) ; National Natural Science Foundation of China(41225009) ; National Natural Science Foundation of China(41225009) ; National Natural Science Foundation of China(41225009) ; National Natural Science Foundation of China(41225009) ; Innovative Project of the Chinese Academy of Sciences(KZCX1-YW-15-1) ; Innovative Project of the Chinese Academy of Sciences(KZCX1-YW-15-1) ; Innovative Project of the Chinese Academy of Sciences(KZCX1-YW-15-1) ; Innovative Project of the Chinese Academy of Sciences(KZCX1-YW-15-1) ; Major National Science and Technology Project(2011ZX05008-001) ; Major National Science and Technology Project(2011ZX05008-001) ; Major National Science and Technology Project(2011ZX05008-001) ; Major National Science and Technology Project(2011ZX05008-001) ; Ministry of Land and Resources Grant(201211024-04) ; Ministry of Land and Resources Grant(201211024-04) ; Ministry of Land and Resources Grant(201211024-04) ; Ministry of Land and Resources Grant(201211024-04)
源URL[http://ir.iggcas.ac.cn/handle/132A11/86630]  
专题中国科学院地质与地球物理研究所
通讯作者Lin, W.
作者单位1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.Univ Orleans, ISTO, UMR 7327, F-45071 Orleans, France
3.CNRS, INSU, ISTO, UMR 7327, F-45071 Orleans, France
4.Bur Rech Geol & Minieres, ISTO, UMR 7327, F-45060 Orleans, France
5.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
6.Hefei Univ Technol, Hefei 230009, Peoples R China
推荐引用方式
GB/T 7714		 Wei, W.,Chen, Y.,Faure, M.,et al. A multidisciplinary study on the emplacement mechanism of the Qingyang-Jiuhua Massif in Southeast China and its tectonic b Part I: Structural geology, AMS and paleomagnetism[J]. JOURNAL OF ASIAN EARTH SCIENCES,2014,86:76-93.
APA Wei, W..,Chen, Y..,Faure, M..,Shi, Y. H..,Martelet, G..,...&Wang, Q. C..(2014).A multidisciplinary study on the emplacement mechanism of the Qingyang-Jiuhua Massif in Southeast China and its tectonic b Part I: Structural geology, AMS and paleomagnetism.JOURNAL OF ASIAN EARTH SCIENCES,86,76-93.
MLA Wei, W.,et al."A multidisciplinary study on the emplacement mechanism of the Qingyang-Jiuhua Massif in Southeast China and its tectonic b Part I: Structural geology, AMS and paleomagnetism".JOURNAL OF ASIAN EARTH SCIENCES 86(2014):76-93.

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