Accretion leading to collision and the Permian Solonker suture, Inner Mongolia, China: Termination of the central Asian orogenic belt

doi:10.1029/2002TC001484

	Accretion leading to collision and the Permian Solonker suture, Inner Mongolia, China: Termination of the central Asian orogenic belt
	Xiao, WJ ; Windley, BF ; Hao, J ; Zhai, MG
刊名	TECTONICS
	2003-12-04
卷号	22 期号:6
关键词	Solonker suture accretion Permian Paleo-Asian ocean Inner Mongolia
ISSN号	0278-7407
DOI	10.1029/2002TC001484
文献子类	Article
英文摘要	The Solonker suture records the termination of the central Asian Orogenic Belt (CAOB). However, tectonic development of the Solonker suture is poorly understood. We report new field data for the Ondor Sum melange in the Ulan valley, and present a new evaluation of the orogenic belt extending from the southern Mongolia cratonic boundary to the north China craton within the context of a new geological framework and tectonic model, which incorporates relevant data from the literature. The southern accretionary zone between the north China craton and the Solonker suture is characterized by the Mid-Ordovician-Early Silurian Ulan island arc-Ondor Sum subduction-accretion complex and the Bainaimiao arc. This zone was consolidated by the Carboniferous-Permian when it evolved into an Andean-type magmatic margin above a south dipping subduction zone. The northern accretionary zone north of the Solonker suture extends southward from a Devonian to Carboniferous active continental margin, through the Hegenshan ophiolite-arc accretionary complex to the Late Carboniferous Baolidao arc associated with some accreted Precambrian blocks. This northern zone had consolidated by the Permian when it developed into an Andean-type magmatic margin above a north dipping subduction zone. Final subduction of the central Asian ocean caused the two opposing active continental margins to collide, leading to formation of the Solonker suture in the end-Permian. Predominant northward subduction during final formation of the suture gave rise in the upper northern plate to a large-scale, postcollisional, south directed thrust and fold belt in the Triassic-Jurassic. In summary, the CAOB underwent three final stages of tectonic development: early Japanese-type accretion, Andean-type magmatism, and Himalayan-type collision.
WOS关键词	TECTONIC EVOLUTION ; NORTHERN CHINA ; U-PB ; GEOCHEMICAL CONSTRAINTS ; HEGENSHAN OPHIOLITE ; PLATE-TECTONICS ; CRUSTAL GROWTH ; SIBERIA ; AGE ; PETROGENESIS
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000187487300001
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/78405]
专题	中国科学院地质与地球物理研究所
通讯作者	Xiao, WJ
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Lithosphere Tecton Evolut, Beijing 100029, Peoples R China 2.Univ Leicester, Dept Geol, Leicester LE1 7RH, Leics, England
推荐引用方式 GB/T 7714	Xiao, WJ,Windley, BF,Hao, J,et al. Accretion leading to collision and the Permian Solonker suture, Inner Mongolia, China: Termination of the central Asian orogenic belt[J]. TECTONICS,2003,22(6).
APA	Xiao, WJ,Windley, BF,Hao, J,&Zhai, MG.(2003).Accretion leading to collision and the Permian Solonker suture, Inner Mongolia, China: Termination of the central Asian orogenic belt.TECTONICS,22(6).
MLA	Xiao, WJ,et al."Accretion leading to collision and the Permian Solonker suture, Inner Mongolia, China: Termination of the central Asian orogenic belt".TECTONICS 22.6(2003).