Temporal-spatial distribution and tectonic implications of the batholiths in the Gaoligong-Tengliang-Yingjiang area, western Yunnan: Constraints from zircon U-Pb ages and Hf isotopes

doi:10.1016/j.jseaes.2011.06.018

	Temporal-spatial distribution and tectonic implications of the batholiths in the Gaoligong-Tengliang-Yingjiang area, western Yunnan: Constraints from zircon U-Pb ages and Hf isotopes
	Xu, Yi-Gang 1; Yang, Qi-Jun 1,2; Lan, Jiang-Bo 1; Luo, Zhen-Yu 1; Huang, Xiao-Long 1; Shi, Yu-Ruo 3; Xie, Lie-Wen 4
刊名	JOURNAL OF ASIAN EARTH SCIENCES
	2012-07-07
卷号	53 页码:151-175
关键词	SHRIMP dating Hf isotope Zircons Granitic batholiths Subduction Crustal thickening Cordilleran-style orogen Gaoligong-Tengliang-Yingjiang belt Western Yunnan
ISSN号	1367-9120
DOI	10.1016/j.jseaes.2011.06.018
文献子类	Article
英文摘要	Considerable progress has recently been made regarding temporal and spatial distribution of magmatism in the Lhasa Terrane. However the eastward and southeastward correlation of these Tibetan magmatic suites in western Yunnan and Burma remains poorly constrained. This paper reports zircon U-Pb dating and Hf isotopic compositions of granites in the Gaoligong-Tengliang-Yingjiang area, west Yunnan. It reveals three episodes of plutonism, and more importantly a southwestward magmatic migration. The Gaoligong batholiths in the northeast were mainly emplaced during early Cretaceous (126-121 Ma) and comprised predominantly S-type granites with negative zircon epsilon Hf values (epsilon(Hf) = -2 similar to-12). The Tengliang granites, situated southwest of the Gaoligong belt, were emplaced in late Cretaceous (68-76 Ma) and also displayed a strong peraluminous affinity and negative epsilon(Hf) (-5 similar to-14), indicating a provenance from a Proterozoic sedimentary source with little mantle contribution. The youngest phase of magmatism (52-66 Ma) occurred in Yingjiang, southwestmost of the study area. It is composed of S-type granites (epsilon Hf = -2 similar to-12) in east Yingjiang and l-type granites (epsilon(Hf) = -4 similar to+6) in west Yingjiang, near the China-Burma border. The late Cretaceous-early Cenozoic plutons in the Tengliang and Yingjiang area are thus considered as the northern continuation of the late Cretaceous magmatic arc (west), which comprises l-type granites and andesitic rocks, and of the belt of predominant S-type granites (east) in Burma, Thailand and Malaysia. Such a chemical polarity of the dual l-type and S-type granites is strongly reminiscent of the northern American Cordillera, indicating a Cordilleran-style continental margin during the late Cretaceous-early Cenozoic. While the magmatic arc was related to eastward subduction of the Neo-Tethys beneath the Asian continent, the S-type granites represented the melting products of thickened crust in the hinterland, in response to subduction-induced decrease in lithospheric strength and compressive plate-convergence forces and to a less degree to the collision between Burma and Sundaland blocks. The Gaoligong early Cretaceous granites, which bear strong similarities in lithology, geochemistry and emplacement age to those in the northern magmatic belt in the Lhasa Terrane, are also the magmatic expression of crustal thickening. This crustal thickening may have stemmed from the collision between the Lhasa Block and the Qiangtang Block in late Jurassic and Early Cretaceous. The magmatism in western Yunnan thus recorded a long-term subduction of the Neo-Tethyan plate, enhanced by continental collisions at different time. (C) 2011 Elsevier Ltd. All rights reserved.
WOS关键词	POSITIONING SYSTEM MEASUREMENTS ; CENOZOIC VOLCANIC-ROCKS ; INDIA-EURASIA COLLISION ; TIBETAN PLATEAU ; SOUTHERN TIBET ; EASTERN TIBET ; GANGDESE BATHOLITH ; BRITISH-COLUMBIA ; KARAKORAM FAULT ; OROGENIC BELT
WOS研究方向	Geology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000306246700013
资助机构	CAS/SAFEA International Partnership Program for Creative Research Teams ; CAS/SAFEA International Partnership Program for Creative Research Teams ; Ministry of Science and Technology China(2002CB412603 ; Ministry of Science and Technology China(2002CB412603 ; National Science Foundation of China(70914001) ; National Science Foundation of China(70914001) ; 2011CB808906) ; 2011CB808906) ; CAS/SAFEA International Partnership Program for Creative Research Teams ; CAS/SAFEA International Partnership Program for Creative Research Teams ; Ministry of Science and Technology China(2002CB412603 ; Ministry of Science and Technology China(2002CB412603 ; National Science Foundation of China(70914001) ; National Science Foundation of China(70914001) ; 2011CB808906) ; 2011CB808906) ; CAS/SAFEA International Partnership Program for Creative Research Teams ; CAS/SAFEA International Partnership Program for Creative Research Teams ; Ministry of Science and Technology China(2002CB412603 ; Ministry of Science and Technology China(2002CB412603 ; National Science Foundation of China(70914001) ; National Science Foundation of China(70914001) ; 2011CB808906) ; 2011CB808906) ; CAS/SAFEA International Partnership Program for Creative Research Teams ; CAS/SAFEA International Partnership Program for Creative Research Teams ; Ministry of Science and Technology China(2002CB412603 ; Ministry of Science and Technology China(2002CB412603 ; National Science Foundation of China(70914001) ; National Science Foundation of China(70914001) ; 2011CB808906) ; 2011CB808906)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/84664]
专题	中国科学院地质与地球物理研究所
通讯作者	Xu, Yi-Gang
作者单位	1.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Guangdong, Peoples R China 2.Guilin Inst Technol, Guilin 541004, Peoples R China 3.Chinese Acad Geol Sci, Inst Geol, Beijing 100037, 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	Xu, Yi-Gang,Yang, Qi-Jun,Lan, Jiang-Bo,et al. Temporal-spatial distribution and tectonic implications of the batholiths in the Gaoligong-Tengliang-Yingjiang area, western Yunnan: Constraints from zircon U-Pb ages and Hf isotopes[J]. JOURNAL OF ASIAN EARTH SCIENCES,2012,53:151-175.
APA	Xu, Yi-Gang.,Yang, Qi-Jun.,Lan, Jiang-Bo.,Luo, Zhen-Yu.,Huang, Xiao-Long.,...&Xie, Lie-Wen.(2012).Temporal-spatial distribution and tectonic implications of the batholiths in the Gaoligong-Tengliang-Yingjiang area, western Yunnan: Constraints from zircon U-Pb ages and Hf isotopes.JOURNAL OF ASIAN EARTH SCIENCES,53,151-175.
MLA	Xu, Yi-Gang,et al."Temporal-spatial distribution and tectonic implications of the batholiths in the Gaoligong-Tengliang-Yingjiang area, western Yunnan: Constraints from zircon U-Pb ages and Hf isotopes".JOURNAL OF ASIAN EARTH SCIENCES 53(2012):151-175.