Structural and Geochronological Constraints on Devonian Suprasubduction Tectonic Switching and Permian Collisional Dynamics in the Chinese Altai, Central Asia

doi:10.1029/2018TC005231

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

	Structural and Geochronological Constraints on Devonian Suprasubduction Tectonic Switching and Permian Collisional Dynamics in the Chinese Altai, Central Asia
	Jiang, Y. D.1,2; Schulmann, K.3,4; Sun, M.5; Weinberg, R. F.6; Stipska, P.3,4; Li, P. F.1; Zhang, J.7; Chopin, F.3,4; Wang, S.1; Xia, X. P.1
刊名	TECTONICS
	2019
卷号	38 期号:1 页码:253-280
关键词	structural synthesis petrochronology orthogonal compression pegmatite dyke Permian collision Chinese Altai
ISSN号	0278-7407
DOI	10.1029/2018TC005231
英文摘要	Kinematic significance and time scales of geodynamic processes forming the Altai Orogenic Belt are addressed through structural and petrological analysis combined with zircon and monazite geochronology. The study area is composed of orogenic lower crust represented by a Devonian migmatite-magmatite complex and orogenic middle and upper crust formed by an amphibolite-facies Ordovician sedimentary sequence and a weakly to unmetamorphosed Devonian volcano-sedimentary cover, respectively. The orogenic lower and middle crust were first affected by moderate thickening, which formed subhorizontal Barrovian metamorphic schistosity. This fabric was reworked by deep crustal melting and intrusion of granite sheets during horizontal extension at 400-380Ma. Soon after, this horizontal fabric was affected by NW-SE shortening generating crustal-scale upright folding associated with subvertical flow of still partially molten orogenic lower crust. During this event, the orogenic lower and middle crust were tightly juxtaposed with upper crustal sedimentary rocks. The last event was related with a NE-SW oriented convergence resulting in large-scale folding and megafold interference pattern in the Permian at 280-273Ma. Combined with existing regional data, our results allow proposing a Devonian tectonic switching from compression to extension and back to compression, as a response to variations of subduction dynamics between slab advance and retreat in a Pacific-type suprasubduction system. The Permian folding was associated with the progressive northward exhumation of thermally softened crust. This tectonic evolution is in response to the indentation of the rigid Junggar arc domain into the weak Altai wedge.
资助项目	National Key R&D Program of China[2017YFC0601205] ; Strategic Priority Research Program of the CAS[XDB18020203] ; NSF China[41672056] ; Czech Science Foundation (GACR grant)[17-17540S] ; CNRS-NSFC collaboration[PRC 1413] ; International Partnership Program of the CAS[132744KYSB20160005] ; GIG-CAS 135 project[135TP201601]
WOS关键词	ZIRCON U-PB ; PALEOZOIC SEDIMENTARY RECORD ; OROGENIC BELT ; NW CHINA ; CONTINENTAL-CRUST ; SW MONGOLIA ; ACCRETIONARY OROGENESIS ; TERRANE SUBDIVISION ; NORTHWESTERN CHINA ; SOUTHERN MARGIN
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000458959800014
资助机构	National Key R&D Program of China ; National Key R&D Program of China ; Strategic Priority Research Program of the CAS ; Strategic Priority Research Program of the CAS ; NSF China ; NSF China ; Czech Science Foundation (GACR grant) ; Czech Science Foundation (GACR grant) ; CNRS-NSFC collaboration ; CNRS-NSFC collaboration ; International Partnership Program of the CAS ; International Partnership Program of the CAS ; GIG-CAS 135 project ; GIG-CAS 135 project ; National Key R&D Program of China ; National Key R&D Program of China ; Strategic Priority Research Program of the CAS ; Strategic Priority Research Program of the CAS ; NSF China ; NSF China ; Czech Science Foundation (GACR grant) ; Czech Science Foundation (GACR grant) ; CNRS-NSFC collaboration ; CNRS-NSFC collaboration ; International Partnership Program of the CAS ; International Partnership Program of the CAS ; GIG-CAS 135 project ; GIG-CAS 135 project ; National Key R&D Program of China ; National Key R&D Program of China ; Strategic Priority Research Program of the CAS ; Strategic Priority Research Program of the CAS ; NSF China ; NSF China ; Czech Science Foundation (GACR grant) ; Czech Science Foundation (GACR grant) ; CNRS-NSFC collaboration ; CNRS-NSFC collaboration ; International Partnership Program of the CAS ; International Partnership Program of the CAS ; GIG-CAS 135 project ; GIG-CAS 135 project ; National Key R&D Program of China ; National Key R&D Program of China ; Strategic Priority Research Program of the CAS ; Strategic Priority Research Program of the CAS ; NSF China ; NSF China ; Czech Science Foundation (GACR grant) ; Czech Science Foundation (GACR grant) ; CNRS-NSFC collaboration ; CNRS-NSFC collaboration ; International Partnership Program of the CAS ; International Partnership Program of the CAS ; GIG-CAS 135 project ; GIG-CAS 135 project
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/90679]
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	Jiang, Y. D.
作者单位	1.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou, Guangdong, Peoples R China 2.Chinese Acad Sci, Inst Earth Sci, Beijing, Peoples R China 3.Czech Geol Survey, Prague, Czech Republic 4.Univ Strasbourg, Inst Phys Globe, EOST, UMR 7516, Strasbourg, France 5.Univ Hong Kong, Dept Earth Sci, Hong Kong, Peoples R China 6.Monash Univ, Sch Earth Atmosphere & Environm, Clayton, Vic, Australia 7.Sun Yat Sen Univ, Sch Earth Sci & Geol Engn, Guangzhou, Guangdong, Peoples R China 8.Chinese Acad Sci, Inst Geol & Geophys, Div Tethys Res Ctr, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Y. D.,Schulmann, K.,Sun, M.,et al. Structural and Geochronological Constraints on Devonian Suprasubduction Tectonic Switching and Permian Collisional Dynamics in the Chinese Altai, Central Asia[J]. TECTONICS,2019,38(1):253-280.
APA	Jiang, Y. D..,Schulmann, K..,Sun, M..,Weinberg, R. F..,Stipska, P..,...&Xiao, W. J..(2019).Structural and Geochronological Constraints on Devonian Suprasubduction Tectonic Switching and Permian Collisional Dynamics in the Chinese Altai, Central Asia.TECTONICS,38(1),253-280.
MLA	Jiang, Y. D.,et al."Structural and Geochronological Constraints on Devonian Suprasubduction Tectonic Switching and Permian Collisional Dynamics in the Chinese Altai, Central Asia".TECTONICS 38.1(2019):253-280.