Are the Chinese Altai "terranes" the result of juxtaposition of different crustal levels during Late Devonian and Permian orogenesis?

doi:10.1016/j.gr.2018.11.003

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 岩石圈演化国家重点实验室

	Are the Chinese Altai "terranes" the result of juxtaposition of different crustal levels during Late Devonian and Permian orogenesis?
	Broussolle, Arnaud 1; Sun, Min 1; Schulmann, Karel 2,3; Guy, Alexandra 2; Aguilar, Carmen 2; Stipska, Pavla 2,3; Jiang, Yingde 4; Yu, Yang 4; Xiao, Wenjiao 5
刊名	GONDWANA RESEARCH
	2019-02-01
卷号	66 页码:183-206
关键词	Central Asian Orogenic Belt 'Terranes' in Chinese Altai Accretionary complex Isotopic geochemistry Tectono-metarnorphic events
ISSN号	1342-937X
DOI	10.1016/j.gr.2018.11.003
英文摘要	The general structure of the Chinese Altai has been traditionally regarded as being formed by five tectono-stratigraphic 'terranes' bounded by large-scale faults. However, numerous detrital zircon studies of the Paleozoic volcano-sedimentary sequences shown that the variably metamorphosed Cambro-Ordovician sequence, known as the Habahe Group, is present at least in four 'terranes' It structurally represents deepest rocks unconformably covered by Devonian and Carboniferous sedimentary and volcanic rocks. Calc-alkaline, mostly Devonian, granitoids that intruded all the terranes revealed their syn-subduction related setting. Geochemistry and isotope features of the syn-subcluction granitoids have shown that they originated mainly from the melting of youthful sediments derived from an eroded Ordovician arc further north. In contrast, Permian alkaline granitoids, mostly located in the southern part of the Chinese Altai. reflect a post-subduction intraplate setting. The metamorphic evolution of the metasedimentary sequences shows an early MP-MT Barrovian event, followed by two Buchan events: LP-HT mid-Devonian (ca. 400-380 Ma) and UHT-HT Permian (ca. 300-270 Ma) cycles. The Barrovian metamorphism is linked to the formation of a regional sub-horizontal possibly Early Devonian fabric and the burial of the Cambro-Ordovician sequence. The Middle Devonian Buchan type event is related to intrusions of the syn-subduction granitoids during an extensional setting and followed by Late Devonian-Early Carboniferous NE-SW trending upright folding and crustal scale doming during a general NW-SE shortening, responsible for the exhumation of the hot lower crust. The last Permian deformation formed NW-SE trending upright folds and vertical zones of deformation related to the extrusion of migmatites, anatectic granitoids and granulite rocks, and to the intrusions of gabbros and granites along the southern border of the Chinese Altai. Finally, the Permo-Triassic cooling and thrust systems affected the whole mountain range from ca. 265 to 230 Ma. In conclusion, the Chinese Altai represents different crustal levels of the lower, middle and upper orogenic crust of a single Cambro-Ordovician accretionary wedge, heterogeneously affected by the Devonian polyphase metamorphism and deformation followed by the Permian tectonothermal reworking event related to the collision with the Junggar arc. It is the interference of Devonian and Permian upright folding events that formed vertical boundaries surrounding the variously exhumed and eroded crustal segments. Consequently, these crustal segments should not be regarded as individual suspect terranes. (C) 2019 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.
资助项目	National Key Research and Development Program of China[2017YFC0601205] ; NSFC[41672056] ; NSFC[41230207] ; International Partnership Program of the Chinese Academy of Sciences[132744KYSB20160005] ; UGC research projects[17303415] ; UGC research projects[17302317] ; HKU grants[201411159173] ; HKU grants[201511159199] ; Czech Science Foundation (GACR grant)[17-17540S] ; Hong Kong RGC
WOS关键词	ZIRCON U-PB ; PALEOZOIC TECTONIC EVOLUTION ; NW CHINA ; CONTINENTAL-CRUST ; NORTHWEST CHINA ; CENTRAL-ASIA ; GRANITIC-ROCKS ; TSEEL TERRANE ; EAST JUNGGAR ; SW MONGOLIA
WOS研究方向	Geology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000468246900011
资助机构	National Key Research and Development Program of China ; National Key Research and Development Program of China ; NSFC ; NSFC ; International Partnership Program of the Chinese Academy of Sciences ; International Partnership Program of the Chinese Academy of Sciences ; UGC research projects ; UGC research projects ; HKU grants ; HKU grants ; Czech Science Foundation (GACR grant) ; Czech Science Foundation (GACR grant) ; Hong Kong RGC ; Hong Kong RGC ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; NSFC ; NSFC ; International Partnership Program of the Chinese Academy of Sciences ; International Partnership Program of the Chinese Academy of Sciences ; UGC research projects ; UGC research projects ; HKU grants ; HKU grants ; Czech Science Foundation (GACR grant) ; Czech Science Foundation (GACR grant) ; Hong Kong RGC ; Hong Kong RGC ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; NSFC ; NSFC ; International Partnership Program of the Chinese Academy of Sciences ; International Partnership Program of the Chinese Academy of Sciences ; UGC research projects ; UGC research projects ; HKU grants ; HKU grants ; Czech Science Foundation (GACR grant) ; Czech Science Foundation (GACR grant) ; Hong Kong RGC ; Hong Kong RGC ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; NSFC ; NSFC ; International Partnership Program of the Chinese Academy of Sciences ; International Partnership Program of the Chinese Academy of Sciences ; UGC research projects ; UGC research projects ; HKU grants ; HKU grants ; Czech Science Foundation (GACR grant) ; Czech Science Foundation (GACR grant) ; Hong Kong RGC ; Hong Kong RGC
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/92105]
专题	地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者	Sun, Min
作者单位	1.Univ Hong Kong, Dept Earth Sci, Pokfulam Rd, Hong Kong, Peoples R China 2.Czech Geol Survey, Ctr Lithospher Res, Prague 11821 1, Czech Republic 3.Univ Strasbourg, Ecole & Observ Sci Terre, Inst Phys Globe Strasbourg CNRS UMR7516, F-67084 Strasbourg, France 4.Chinese Acad Sci, State Key Lab Isotope Geochem, Guangzhou Inst Geochem, Guangzhou 510640, Guangdong, Peoples R China 5.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Broussolle, Arnaud,Sun, Min,Schulmann, Karel,et al. Are the Chinese Altai "terranes" the result of juxtaposition of different crustal levels during Late Devonian and Permian orogenesis?[J]. GONDWANA RESEARCH,2019,66:183-206.
APA	Broussolle, Arnaud.,Sun, Min.,Schulmann, Karel.,Guy, Alexandra.,Aguilar, Carmen.,...&Xiao, Wenjiao.(2019).Are the Chinese Altai "terranes" the result of juxtaposition of different crustal levels during Late Devonian and Permian orogenesis?.GONDWANA RESEARCH,66,183-206.
MLA	Broussolle, Arnaud,et al."Are the Chinese Altai "terranes" the result of juxtaposition of different crustal levels during Late Devonian and Permian orogenesis?".GONDWANA RESEARCH 66(2019):183-206.