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Tectonics of the Middle Triassic intracontinental Xuefengshan Belt, South China: new insights from structural and chronological constraints on the basal d,collement zone

文献类型：期刊论文

作者Chu, Yang1,2,3; Faure, Michel1,2; Lin, Wei1; Wang, Qingchen1; Ji, Wenbin1,3
刊名INTERNATIONAL JOURNAL OF EARTH SCIENCES
出版日期2012-11-01
卷号101期号:8页码:2125-2150
关键词Intracontinental belt Basal decollement zone Xuefengshan South China block Triassic tectonics
ISSN号1437-3254
DOI10.1007/s00531-012-0780-5
文献子类Article
英文摘要In orogenic belts, a basal d,collement zone often develops at depth to accommodate the shortening due to folding and thrusting of the sedimentary cover. In the Early Mesozoic intracontinental Xuefengshan Belt of South China, such a d,collement zone is exposed in the core of anticlines formed by the emplacement of the late-orogenic granitic plutons. Our detailed, multi-scale structural analysis documents a synmetamorphic ductile deformation. In the basal d,collement, the Neoproterozoic pelite and sandstone, and the intruding Early Paleozoic granites were deformed and metamorphosed into mylonites and orthogneiss, respectively. The metamorphic foliation contains a NW-SE stretching lineation associated with top-to-the-NW kinematic indicators. The ductile shearing of these high-strained rocks can be correlated with NW-verging folds and thrusts recognized in the Neoproterozoic to Early Triassic sedimentary cover. Monazite U-Th-Pb-tot chemical dating, and zircon SIMS U-Pb dating provide age constraints of the ductile shearing between 243 and 226 Ma, and late-orogenic granite emplacement around 235-215 Ma. In agreement with recent geochronological data, these new results show that the Xuefengshan Belt is an Early Mesozoic orogen dominated by the NW-directed shearing and thrusting. At the southeastern boundary of the Xuefengshan Belt, the Chenzhou-Linwu fault separates the Early Mesozoic domain to the NW from the Early Paleozoic domain to the SE. The tectonic architecture of this belt was possibly originated from the continental underthrusting to the SE of the South China block in response to northwest-directed subduction of the Paleo-Pacific plate.
WOS关键词MS U-PB ; ULTRAHIGH-PRESSURE METAMORPHISM ; TRUONG SON BELT ; INDOSINIAN OROGENY ; CATHAYSIA BLOCKS ; SE CHINA ; AR-40/AR-39 GEOCHRONOLOGY ; CENOZOIC TECTONICS ; HUNAN PROVINCE ; CRUSTAL-SCALE
WOS研究方向Geology
语种英语
WOS记录号WOS:000310232100004
出版者SPRINGER
资助机构Chinese Academy of Sciences(KZCX1-YW-15-1) ; Chinese Academy of Sciences(KZCX1-YW-15-1) ; Major State Basic Research Development Program of China(2009CB825008) ; Major State Basic Research Development Program of China(2009CB825008) ; National Natural Science Foundation of China(90714007 ; National Natural Science Foundation of China(90714007 ; 40730315) ; 40730315) ; Chinese Academy of Sciences(KZCX1-YW-15-1) ; Chinese Academy of Sciences(KZCX1-YW-15-1) ; Major State Basic Research Development Program of China(2009CB825008) ; Major State Basic Research Development Program of China(2009CB825008) ; National Natural Science Foundation of China(90714007 ; National Natural Science Foundation of China(90714007 ; 40730315) ; 40730315) ; Chinese Academy of Sciences(KZCX1-YW-15-1) ; Chinese Academy of Sciences(KZCX1-YW-15-1) ; Major State Basic Research Development Program of China(2009CB825008) ; Major State Basic Research Development Program of China(2009CB825008) ; National Natural Science Foundation of China(90714007 ; National Natural Science Foundation of China(90714007 ; 40730315) ; 40730315) ; Chinese Academy of Sciences(KZCX1-YW-15-1) ; Chinese Academy of Sciences(KZCX1-YW-15-1) ; Major State Basic Research Development Program of China(2009CB825008) ; Major State Basic Research Development Program of China(2009CB825008) ; National Natural Science Foundation of China(90714007 ; National Natural Science Foundation of China(90714007 ; 40730315) ; 40730315)
源URL[http://ir.iggcas.ac.cn/handle/132A11/84760]  
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 Lithopher Evolut, Beijing 100029, Peoples R China
2.Univ Orleans, Inst Sci Terre Orleans, F-45071 Orleans 2, France
3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Chu, Yang,Faure, Michel,Lin, Wei,et al. Tectonics of the Middle Triassic intracontinental Xuefengshan Belt, South China: new insights from structural and chronological constraints on the basal d,collement zone[J]. INTERNATIONAL JOURNAL OF EARTH SCIENCES,2012,101(8):2125-2150.
APA Chu, Yang,Faure, Michel,Lin, Wei,Wang, Qingchen,&Ji, Wenbin.(2012).Tectonics of the Middle Triassic intracontinental Xuefengshan Belt, South China: new insights from structural and chronological constraints on the basal d,collement zone.INTERNATIONAL JOURNAL OF EARTH SCIENCES,101(8),2125-2150.
MLA Chu, Yang,et al."Tectonics of the Middle Triassic intracontinental Xuefengshan Belt, South China: new insights from structural and chronological constraints on the basal d,collement zone".INTERNATIONAL JOURNAL OF EARTH SCIENCES 101.8(2012):2125-2150.

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来源：地质与地球物理研究所

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