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A multidisciplinary study of the emplacement mechanism of the Qingyang-Jiuhua massif in Southeast China and its tectonic bearings. Part II: Amphibole geobarometry and gravity modeling

文献类型：期刊论文

作者Wei, Wei1,2,3,4,5; Martelet, Guillaume3,4; Le Breton, Nicole2,3,4; Shi, Yonghong6; Faure, Michel2,3,4; Chen, Yan2,3,4; Hou, Quanlin1; Lin, Wei5; Wang, Qingchen5
刊名JOURNAL OF ASIAN EARTH SCIENCES
出版日期2014-06-01
卷号86页码:94-105
关键词South China Late Mesozoic extension Ai(total) in amphibole geobarometry Gravity modeling
ISSN号1367-9120
DOI10.1016/j.jseaes.2013.09.021
文献子类Article
英文摘要The Late Mesozoic geology of the Lower Yangtze area is characterized by extensional sedimentary basins, numerous granitic plutons and several world-class ore deposits. Regionaly, the coeval tectonic and geodynamic framework remains inadequately investigated. In order to provide a more comprehensive understanding of the regional tectonic context, we performed a multidisciplinary study of the emplacement mechanism of the Qingyang-Jiuhua massif. It consists of the granodioritic Qingyang and the monzogranitic Jiuhua plutons, U-Pb dated at 142 +/- 1.0 Ma and 131 +/- 2.6 Ma, respectively. Biotite and amphibole cooling ages are 5-8 myr younger. Results deduced from field structural observation, petrographic and magnetic fabrics, paleomagnetism show that this massif was probably vertically emplaced by permissive intrusion coeval with weak regional extension. However, detailed information on the characteristics of this tectonic event and its emplacement depth was not documented. Therefore, we carried out an investigation of amphibole geobarometry and gravity modeling in order to address the emplacement mode of the plutons within their regional tectonic framework. Amphibole data show that the Qingyang-Jiuhua massif was emplaced in the upper crust at a depth between 5 and 12 km. Gravity modeling indicates that the massif is laccolithic. It is characterized by several NE-SW-striking linear thickening zones that we interpret as the feeder roots of the massif. These results led us to conclude that (1) the Qingyang-Jiuhua massif was fed by vertical, NE-SW striking tension gashes; (2) consequently the late Early Cretaceous tectonics in the study area was characterized by NW-SE extension. (C) 2013 Elsevier Ltd. All rights reserved.
WOS关键词IN-HORNBLENDE BAROMETER ; LU FAULT ZONE ; EASTERN CHINA ; ANHUI PROVINCE ; YANGTZE-RIVER ; DABIE OROGEN ; MESOZOIC GRANITES ; CATHAYSIA BLOCKS ; JIANGXI PROVINCE ; ZIRCON AGES
WOS研究方向Geology
语种英语
WOS记录号WOS:000335431600007
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构NSFC(41225009) ; NSFC(41225009) ; The Project of Major State Special Research on the Petroleum form National Development and Reform Commissio(2011ZX05008-001) ; The Project of Major State Special Research on the Petroleum form National Development and Reform Commissio(2011ZX05008-001) ; 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) ; Ministry of Land and Resources(201211024-04) ; Ministry of Land and Resources(201211024-04) ; NSFC(41225009) ; NSFC(41225009) ; The Project of Major State Special Research on the Petroleum form National Development and Reform Commissio(2011ZX05008-001) ; The Project of Major State Special Research on the Petroleum form National Development and Reform Commissio(2011ZX05008-001) ; 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) ; Ministry of Land and Resources(201211024-04) ; Ministry of Land and Resources(201211024-04) ; NSFC(41225009) ; NSFC(41225009) ; The Project of Major State Special Research on the Petroleum form National Development and Reform Commissio(2011ZX05008-001) ; The Project of Major State Special Research on the Petroleum form National Development and Reform Commissio(2011ZX05008-001) ; 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) ; Ministry of Land and Resources(201211024-04) ; Ministry of Land and Resources(201211024-04) ; NSFC(41225009) ; NSFC(41225009) ; The Project of Major State Special Research on the Petroleum form National Development and Reform Commissio(2011ZX05008-001) ; The Project of Major State Special Research on the Petroleum form National Development and Reform Commissio(2011ZX05008-001) ; 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) ; Ministry of Land and Resources(201211024-04) ; Ministry of Land and Resources(201211024-04)
源URL[http://ir.iggcas.ac.cn/handle/132A11/85113]  
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.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, SKL, Beijing 100029, Peoples R China
6.Hefei Univ Technol, Hefei 230009, Peoples R China
推荐引用方式
GB/T 7714		 Wei, Wei,Martelet, Guillaume,Le Breton, Nicole,et al. A multidisciplinary study of the emplacement mechanism of the Qingyang-Jiuhua massif in Southeast China and its tectonic bearings. Part II: Amphibole geobarometry and gravity modeling[J]. JOURNAL OF ASIAN EARTH SCIENCES,2014,86:94-105.
APA Wei, Wei.,Martelet, Guillaume.,Le Breton, Nicole.,Shi, Yonghong.,Faure, Michel.,...&Wang, Qingchen.(2014).A multidisciplinary study of the emplacement mechanism of the Qingyang-Jiuhua massif in Southeast China and its tectonic bearings. Part II: Amphibole geobarometry and gravity modeling.JOURNAL OF ASIAN EARTH SCIENCES,86,94-105.
MLA Wei, Wei,et al."A multidisciplinary study of the emplacement mechanism of the Qingyang-Jiuhua massif in Southeast China and its tectonic bearings. Part II: Amphibole geobarometry and gravity modeling".JOURNAL OF ASIAN EARTH SCIENCES 86(2014):94-105.

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来源：地质与地球物理研究所

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