Arc-ophiolite obduction in the Western Kunlun Range (China): implications for the Palaeozoic evolution of central Asia

	Arc-ophiolite obduction in the Western Kunlun Range (China): implications for the Palaeozoic evolution of central Asia
	Xiao, WJ ; Windley, BF ; Hao, J ; Li, JL
刊名	JOURNAL OF THE GEOLOGICAL SOCIETY
	2002-09-01
卷号	159 页码:517-528
关键词	Kudi Western Kunlun Range island arcs ophiolites obduction
ISSN号	0016-7649
文献子类	Article
英文摘要	The nature of the 'Kudi ophiolite' in the Western Kunlun Range is hotly debated. Our new structural-geochemical data reveal that it is actually an arc ophiolite comprising: (1) arc- or ophiolite-derived turbidites of two generations containing Late Ordovician-Silurian and Late Devonian-Early Carboniferous radiolarians; (2) a central intra-oceanic (Yixieke) arc with basalt-andesite-tuff-agglomerate; (3) lower (Buziwan) oceanic crust containing dunite-harzburgite-gabbro. We propose the following tectonic evolution. South-dipping subduction in Late Cambrian to earliest Ordovician time generated the Yixieke arc on top of the Buziwan oceanic crust-mantle. This subduction led to emplacement of the arc northwards onto the North Kunlun terrane (Tarim block), creating an active continental margin with northward subduction below it. The Kudi ophiolite was thrust southeastward over the incoming Kudi continental (gneiss) terrane in mid-Ordovician-mid-Devonian time. During a tectonic hiatus in the Kudi region Late Devonian-Carboniferous subduction further west led to development of the Oytag arc, formerly regarded as an equivalent of the Kudi ophiolite. Lower Permian arc lavas and Upper Triassic granites in the Xiananqiao arc south of Kudi mark the resumption of north-dipping subduction before final collision with the incoming Qiangtang block. Comparison with the Lapeiquan ophiolite in the Eastern Kunlun assists regional correlation along this Palaeozoic orogen and constrains Cenozoic displacement of the Altyn Tagh fault.
WOS关键词	ALTYN-TAGH-FAULT ; NORTHERN TIBET ; EASTERN PAMIR ; KONGUR-SHAN ; TARIM ; TECTONICS ; XINJIANG ; COLLISION ; MOUNTAINS ; TETHYS
WOS研究方向	Geology
语种	英语
出版者	GEOLOGICAL SOC PUBL HOUSE
WOS记录号	WOS:000177855400005
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/77705]
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. Arc-ophiolite obduction in the Western Kunlun Range (China): implications for the Palaeozoic evolution of central Asia[J]. JOURNAL OF THE GEOLOGICAL SOCIETY,2002,159:517-528.
APA	Xiao, WJ,Windley, BF,Hao, J,&Li, JL.(2002).Arc-ophiolite obduction in the Western Kunlun Range (China): implications for the Palaeozoic evolution of central Asia.JOURNAL OF THE GEOLOGICAL SOCIETY,159,517-528.
MLA	Xiao, WJ,et al."Arc-ophiolite obduction in the Western Kunlun Range (China): implications for the Palaeozoic evolution of central Asia".JOURNAL OF THE GEOLOGICAL SOCIETY 159(2002):517-528.