Early Paleozoic to Middle Triassic bivergent accretion in the Central Asian Orogenic Belt: insights from zircon U-Pb dating of ductile shear zones in central Inner Mongolia, China

doi:10.1016/j.lithos.2014.06.017

	Early Paleozoic to Middle Triassic bivergent accretion in the Central Asian Orogenic Belt: insights from zircon U-Pb dating of ductile shear zones in central Inner Mongolia, China
	Li, Yilong 1,2,3; Zhou, Hanwen 1,3; Brouwer, Fraukje M.2; Xiao, Wenjiao 4; Wijbrans, Jan R.2; Zhong, Zengqiu 1,3
刊名	LITHOS
	2014-09-15
卷号	205 页码:84-111
关键词	Zircon LA-ICP-MS U-Pb dating Subduction Accretion Ductile shear zone Solonker suture Central Asian Orogenic Belt
ISSN号	0024-4937
DOI	10.1016/j.lithos.2014.06.017
文献子类	Article
英文摘要	The Solonker suture zone records the termination of convergence in the southern Central Asian Orogenic Belt (CAOB). The timing of termination of the Solonker suture and the tectonic style of the southern CAOB have long been controversial. The Baolidao arc-accretion complex and the Ondor Sum subduction-accretion complex are located immediately to the north and south of the Solonker suture zone respectively. However, the tectonic settings and formation ages of these two complexes are debated. In this paper, we present a systematic study of LA-ICPMS U-Pb zircon ages of multiple units and lithologies from both the complexes to constrain the timing of final collision between the South Mongolian microcontinent and the North China craton. The geochronological results indicate that the northward subduction of the Paleoasian Oceanic lithosphere beneath the South Mongolian microcontinent at similar to 452 Ma induced extensive melting of overriding continental crust. Continuous subduction led to accretionary wedge-continent collision at the southern margin of the South Mongolian microcontinent, represented by the 416 +/- 3 Ma granitic activity in the southern margin of the Baolidao arc-accretion complex. After Early Paleozoic collision, widespread magmatism occurred at 316-302 Ma in response to transient extension along the southern margin of the South Mongolian microcontinent There was a deep marine basin during Permian times to the south of the microcontinent The closure of this oceanic basin led to Late Paleozoic-Early Triassic north-dipping subduction and final suturing of the CAOB during Late Permian to Middle Triassic times. Proximal forearc sediments composed of arc volcanic and plutonic materials with crystallization ages varying from 299 +/- 3 Ma to 267 +/- 3 Ma, and some intrusions at 274 +/- 2 Ma caused by the melting of continental crust were produced along the northern margin of the Solonker suture zone. Accretion and collision occurred at similar to 263 Ma. The southward subduction of the Paleoasian Oceanic lithosphere beneath the North China craton at similar to 451 Ma induced high-grade metamorphism and partial melting in the south-dipping subduction zone. An arc/forearc-related ocean at the northern margin of the North China craton existed during the southward subduction (324-300 Ma) and was filled during transient regional extension (299-290 Ma) in Linxi area to form the protolith of the Shuangjing Schist, accompanied with widespread Late Carboniferous to Early Permian arc volcanic and plutonic activity in the CAOB. Initial subduction of the arc/forearc-related oceanic basin occurred during 290-280 Ma, and was followed by the convergence of the North China craton and the South Mongolian microcontinent until similar to 230 Ma. The eastern section of the CAOB formed by bivergent Early Paleozoic to Middle Triassic accretion until similar to 263-230 Ma that ended in the closure of the Paleoasian Ocean. (C) 2014 Elsevier B.V. All rights reserved.
WOS关键词	PHANEROZOIC CRUSTAL GROWTH ; XILIN GOL COMPLEX ; CONTINENTAL GROWTH ; SOLONKER SUTURE ; TRACE-ELEMENT ; NORTH CHINA ; TECTONIC IMPLICATIONS ; GEODYNAMIC EVOLUTION ; ISOTOPIC EVIDENCE ; EASTERN PART
WOS研究方向	Geochemistry & Geophysics ; Mineralogy
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000342524800006
资助机构	National Natural Science Foundation of China(41202038 ; National Natural Science Foundation of China(41202038 ; Chinese National Basic Research Program 973(2007CB411307) ; Chinese National Basic Research Program 973(2007CB411307) ; China Bureau of Geological Investigation(1212010510507) ; China Bureau of Geological Investigation(1212010510507) ; 41230207 ; 41230207 ; 41390441 ; 41390441 ; 41190075 ; 41190075 ; 41202150) ; 41202150) ; National Natural Science Foundation of China(41202038 ; National Natural Science Foundation of China(41202038 ; Chinese National Basic Research Program 973(2007CB411307) ; Chinese National Basic Research Program 973(2007CB411307) ; China Bureau of Geological Investigation(1212010510507) ; China Bureau of Geological Investigation(1212010510507) ; 41230207 ; 41230207 ; 41390441 ; 41390441 ; 41190075 ; 41190075 ; 41202150) ; 41202150) ; National Natural Science Foundation of China(41202038 ; National Natural Science Foundation of China(41202038 ; Chinese National Basic Research Program 973(2007CB411307) ; Chinese National Basic Research Program 973(2007CB411307) ; China Bureau of Geological Investigation(1212010510507) ; China Bureau of Geological Investigation(1212010510507) ; 41230207 ; 41230207 ; 41390441 ; 41390441 ; 41190075 ; 41190075 ; 41202150) ; 41202150) ; National Natural Science Foundation of China(41202038 ; National Natural Science Foundation of China(41202038 ; Chinese National Basic Research Program 973(2007CB411307) ; Chinese National Basic Research Program 973(2007CB411307) ; China Bureau of Geological Investigation(1212010510507) ; China Bureau of Geological Investigation(1212010510507) ; 41230207 ; 41230207 ; 41390441 ; 41390441 ; 41190075 ; 41190075 ; 41202150) ; 41202150)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/85966]
专题	中国科学院地质与地球物理研究所
通讯作者	Li, Yilong
作者单位	1.China Univ Geosci, Sch Earth Sci, Wuhan 430074, Peoples R China 2.Vrije Univ Amsterdam, Dept Earth Sci, NL-1081 HV Amsterdam, Netherlands 3.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China 4.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	Li, Yilong,Zhou, Hanwen,Brouwer, Fraukje M.,et al. Early Paleozoic to Middle Triassic bivergent accretion in the Central Asian Orogenic Belt: insights from zircon U-Pb dating of ductile shear zones in central Inner Mongolia, China[J]. LITHOS,2014,205:84-111.
APA	Li, Yilong,Zhou, Hanwen,Brouwer, Fraukje M.,Xiao, Wenjiao,Wijbrans, Jan R.,&Zhong, Zengqiu.(2014).Early Paleozoic to Middle Triassic bivergent accretion in the Central Asian Orogenic Belt: insights from zircon U-Pb dating of ductile shear zones in central Inner Mongolia, China.LITHOS,205,84-111.
MLA	Li, Yilong,et al."Early Paleozoic to Middle Triassic bivergent accretion in the Central Asian Orogenic Belt: insights from zircon U-Pb dating of ductile shear zones in central Inner Mongolia, China".LITHOS 205(2014):84-111.