Revisiting the "Irtish tectonic belt": Implications for the Paleozoic;tectonic evolution of the Altai orogen

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	Revisiting the "Irtish tectonic belt": Implications for the Paleozoic;tectonic evolution of the Altai orogen
	Zhang, Chuan-Lin 7; Santosh, M.; Zou, Hai-Bo ; Xu, Yi-Gang ; Zhou, Gang ; Dong, Yong-Guan ; Ding, Ru-Fu ; Wang, Hong-Yan
刊名	JOURNAL OF ASIAN EARTH SCIENCES
	2012
卷号	52 页码:117-133
关键词	Irtish tectonic belt Geochronology Tectonic evolution Permian mantle plume
ISSN号	951RZ
英文摘要	The Irtish tectonic belt is one of the most important suture zones in the Central Asian Orogenic Belt (CAOB). The various models invoked to explain the tectonic evolution of this belt in relation to Paleozoic continental growth include: (1) syn-subduction strike-slip duplication of a single long-lived arc, and (2) collision of many arcs and micro-continents. Here we report new results from detailed field studies, geochemistry and zircon U-Pb geochronology on the major rock units along the Irtish belt both in Kazakhstan and in the Chinese Altay. Our new results, together with information from published data, suggest that the Altai-Mongolia terrain witnessed several episodes of subduction. The Junggar terrain, which formed by multiple collisions of intra-oceanic arcs, seamounts and ophiolite suites prior to 330 Ma, subsequently amalgamated with the Altai-Mongolia terrain at around 320 Ma along the Irtish suture zone. Following the clockwise rotation of the Siberian craton and the N-directed movement of the Junggar terrain, the sinistral strike-slip motion along the Irtish suture zone resulted in ductile shearing, partial melting of the crustal material, and the formation of mylonites, syn-tectonic migmatite and gneissic granites. The sinistral strike-slip deformation of the Irtish suture zone culminated at ca. 275 Ma. The diverse 275-250 Ma magmatism (mafic-ultramafic complexes, bimodal intrusives, mafic and silicic dykes, A-type and 1-A-type granites) is related to magma pulses generated by the Permian Tarim mantle plume. Our model of multiple episodes of subduction below the Altai arc is different from previous models and proposes that the subduction continued until Triassic with the Permian subduction under the Altai arc and a late Permian large-scale south-directed thrusting. (C) 2012 Elsevier Ltd. All rights reserved.
学科主题	构造地质学
WOS关键词	NW CHINA IMPLICATIONS ; PHANEROZOIC CRUSTAL GROWTH ; LARGE IGNEOUS ; PROVINCE ; ZIRCON U-PBSHRIMP ; CENTRAL-ASIA ; NORTHWEST CHINA ; CONTINENTAL ; GROWTH ; SOUTHERN ALTAIDS ; ACCRETIONARY OROGENESIS ; GEOLOGICAL ; SIGNIFICANCE
WOS研究方向	Geosciences, Multidisciplinary
语种	英语
出版者	We thank Prof. Hui-Kun Li and Hui-Min Li for their assistance with;LA-ICPMS zircon U-Pb analysis. We sincerely thank Prof. Bor-Ming Jahn;and an anonymous reviews for their detailed critical and constructive;reviews that significantly improved the quality of this paper. This;study is financially supported by Major State Basic Research Program of;the PR China (2011CB808303), National Basic Research program of China;(2011BAB06B03) and the CAS/SAFEA International Partnership Program for;Creative Research Teams (KZCX2-YW-t004).
WOS记录号	WOS:000304739000011
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39486]
专题	中国地质调查局南京地质调查中心
作者单位	1.Chinese Geol Survey, Nanjing Inst Geol & Mineral Resources, Nanjing 210016, Peoples R China. 2.Kochi Univ, Div Interdisciplinary Sci, Fac Sci, Kochi 7808520, Japan. 3.China Univ Geosci Beijing, Beijing 100083, Peoples R China. 4.Auburn Univ, Dept Geol & Geog, Auburn, AL 36849 USA. 5.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Isotope Geochronol & Geochem, Guangzhou 510640, Guangdong, Peoples R China. 6.Xinjiang Bur Geol & Mineral Resources, Urumqi 830000, Peoples R China. 7.中国地质调查局南京地质调查中心
推荐引用方式 GB/T 7714	Zhang, Chuan-Lin,Santosh, M.,Zou, Hai-Bo,et al. Revisiting the "Irtish tectonic belt": Implications for the Paleozoic;tectonic evolution of the Altai orogen[J]. JOURNAL OF ASIAN EARTH SCIENCES,2012,52:117-133.
APA	Zhang, Chuan-Lin.,Santosh, M..,Zou, Hai-Bo.,Xu, Yi-Gang.,Zhou, Gang.,...&Wang, Hong-Yan.(2012).Revisiting the "Irtish tectonic belt": Implications for the Paleozoic;tectonic evolution of the Altai orogen.JOURNAL OF ASIAN EARTH SCIENCES,52,117-133.
MLA	Zhang, Chuan-Lin,et al."Revisiting the "Irtish tectonic belt": Implications for the Paleozoic;tectonic evolution of the Altai orogen".JOURNAL OF ASIAN EARTH SCIENCES 52(2012):117-133.