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Metamorphic Core Complex dynamics and structural development: Field evidences from the Liaodong Peninsula (China, East Asia)

文献类型：期刊论文

作者Charles, Nicolas1,2,3,4; Gumiaux, Charles2,3,4; Augier, Romain2,3,4; Chen, Yan2,3,4; Faure, Michel2,3,4; Lin, Wei5; Zhu, Rixiang5
刊名TECTONOPHYSICS
出版日期2012-08-17
卷号560页码:22-50
ISSN号0040-1951
关键词Continental extension Wide rift Partial melting MCC development East Asia AMS
DOI10.1016/j.tecto.2012.06.019
文献子类Article
英文摘要Metamorphic Core Complexes (MCC) constitute remarkable features within wide rifts. Based on analogue and numerical modelling, MCC dynamics and structural development are mainly controlled by first geothermal gradient, second the compositional layering, and after the strain rate and partial melting. In the Late Mesozoic, continental extension occurred in East Asia leading to the development of MCC, magmatism and extensional sedimentary basins. Based on an integrated study (i.e. structural and finite strain analysis, petrofabrics, Anisotropy of Magnetic Susceptibility (AMS) and U/Pb on zircon dating), this paper aims at constraining the tectonic evolution and deformation mechanisms in the South Liaodong Peninsula (NE China). The Gudaoling massif is identified as a "migmatitic" MCC developed from Upper Jurassic (ca. 157-154 Ma) to Early Cretaceous (ca. 128-113 Ma). Intrusion of the Yinmawanshan synkinematic pluton (Early Cretaceous) to the south of the dome marks out the final stages of shearing along the Gudaoling detachment zone and of exhumation of the MCC into the upper crust. The Gudaoling MCC and the Yinmawanshan pluton stay in line with the coeval South Liaodong MCC. to the south, all making a similar to 140x30 km wide extensional band formed during a regional E-W to NW-SE crustal stretching. The area shows a bi-phased development with a "slow" and a "fast" stage which corresponds to (1) crustal necking and (2) dome amplification/exhumation stages according to published thermo-mechanical modelling results. Finally, the Gudaoling MCC lower unit almost exclusively displays migmatites and anatectic granitoids of Late Jurassic and Early Cretaceous, respectively. Occurrence of partial melting during earlier stages of extension seems controlling the initiation of MCC (as a soft anomaly within the lower crust). In East Asia, a regional-scale thermal event, during Jurassic-Cretaceous times, may have significantly reduced the bulk lithosphere strength and locally induced partial melting, emphasizing pervasive deformations and development of a wide rift system. (C) 2012 Elsevier B.V. All rights reserved.
WOS关键词SINO-KOREAN CRATON ; U-PB ZIRCON ; MESOZOIC EXTENSIONAL TECTONICS ; THOR-ODIN DOME ; NORTH-CHINA ; NE CHINA ; MAGNETIC-SUSCEPTIBILITY ; LITHOSPHERIC EXTENSION ; CONTINENTAL EXTENSION ; MONTAGNE NOIRE
WOS研究方向Geochemistry & Geophysics
语种英语
出版者ELSEVIER SCIENCE BV
WOS记录号WOS:000308058600002
资助机构INSU-CNRS ; INSU-CNRS ; Chinese National 973 Project(2009CB825008) ; Chinese National 973 Project(2009CB825008) ; INSU-CNRS ; INSU-CNRS ; Chinese National 973 Project(2009CB825008) ; Chinese National 973 Project(2009CB825008) ; INSU-CNRS ; INSU-CNRS ; Chinese National 973 Project(2009CB825008) ; Chinese National 973 Project(2009CB825008) ; INSU-CNRS ; INSU-CNRS ; Chinese National 973 Project(2009CB825008) ; Chinese National 973 Project(2009CB825008)
源URL[http://ir.iggcas.ac.cn/handle/132A11/84548]  
专题中国科学院地质与地球物理研究所
通讯作者Charles, Nicolas
作者单位1.Bur Rech Geol & Minieres, F-45060 Orleans, France
2.Univ Orleans, ISTO, UMR7327, F-45071 Orleans, France
3.CNRS, INSU, ISTO, UMR7327, F-45071 Orleans, France
4.Bur Rech Geol & Minieres, ISTO, UMR7327, F-45060 Orleans, France
5.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Charles, Nicolas,Gumiaux, Charles,Augier, Romain,et al. Metamorphic Core Complex dynamics and structural development: Field evidences from the Liaodong Peninsula (China, East Asia)[J]. TECTONOPHYSICS,2012,560:22-50.
APA Charles, Nicolas.,Gumiaux, Charles.,Augier, Romain.,Chen, Yan.,Faure, Michel.,...&Zhu, Rixiang.(2012).Metamorphic Core Complex dynamics and structural development: Field evidences from the Liaodong Peninsula (China, East Asia).TECTONOPHYSICS,560,22-50.
MLA Charles, Nicolas,et al."Metamorphic Core Complex dynamics and structural development: Field evidences from the Liaodong Peninsula (China, East Asia)".TECTONOPHYSICS 560(2012):22-50.

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来源：地质与地球物理研究所

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