Contrasting Middle Jurassic and Early Cretaceous mafic intrusive rocks from western Liaoning, North China craton: petrogenesis and tectonic implications

doi:10.1017/S0016756810000373

	Contrasting Middle Jurassic and Early Cretaceous mafic intrusive rocks from western Liaoning, North China craton: petrogenesis and tectonic implications
	Zhang, Xiaohui 1; Zhang, Hongfu 1; Jiang, Neng 1; Wilde, Simon A.2
刊名	GEOLOGICAL MAGAZINE
	2010-11-01
卷号	147 期号:6 页码:844-859
关键词	Mafic Intrusions Late Mesozoic Petrogenesis Lithospheric Thinning North China Craton
ISSN号	0016-7568
DOI	10.1017/S0016756810000373
文献子类	Article
英文摘要	Zircon U-Pb dating, whole-rock major oxide, trace element and Sr-Nd isotopic data are presented for the Late Mesozoic mafic intrusive rocks from Yiwulushan of western Liaoning along the eastern segment of the Yanshan belt, North China craton, with two episodes of magmatism documented. Middle Jurassic hornblende-rich gabbros show enrichment of large ion lithophile elements and light REE, and prominent depletion in high field strength elements, and possess moderately enriched isotopic compositions with ((87)Sr/(86)Sr)(i) ranging from 0.7056 to 0.7065 and epsilon(Nd)(t) from -5.0 to -7.1. These features suggest that the gabbros were derived from an amphibole-bearing harzburgitic lithospheric mantle source metasomatized recently by slab-derived fluids. By contrast, Early Cretaceous mafic dykes are gabbroic dioritic to dioritic in composition, with comparable trace element characteristics to continental crust and depleted isotopic signatures (((87)Sr/(86)Sr)(i) = 0.7048-0.7055, epsilon(Nd)(t) = 0 to -3.0). They probably originated from partial melting of a relatively fertile asthenospheric mantle in the spinel stability field, with subsequent lower crustal assimilation and fractional crystallization. These two contrasting mafic intrusive suites, together with multiple Mesozoic mafic volcanic rocks from western Liaoning, documented a localized lithospheric thinning process, mainly through prolonged hydro-weakening or melt-rock interaction and triggered by gravitational collapse, possibly within an evolved post-collisional to within-plate extensional regime.
WOS关键词	SINO-KOREAN CRATON ; ASIAN OROGENIC BELT ; LITHOSPHERIC MANTLE BENEATH ; HIGH-MG ANDESITES ; CALC-ALKALINE ; CONTINENTAL-CRUST ; POSTCOLLISIONAL TRANSITION ; GRAVITATIONAL COLLAPSE ; ISOTOPIC EVIDENCE ; TIBETAN PLATEAU
WOS研究方向	Geology
语种	英语
出版者	CAMBRIDGE UNIV PRESS
WOS记录号	WOS:000283778000004
资助机构	National Natural Science Foundation of China(90914008 ; National Natural Science Foundation of China(90914008 ; National Natural Science Foundation of China(90914008 ; National Natural Science Foundation of China(90914008 ; Chinese Academy of Sciences(KZCX2-YW-QN115) ; Chinese Academy of Sciences(KZCX2-YW-QN115) ; Chinese Academy of Sciences(KZCX2-YW-QN115) ; Chinese Academy of Sciences(KZCX2-YW-QN115) ; Major State Basic Research Program of the People's Republic of China(2006CB403504) ; Major State Basic Research Program of the People's Republic of China(2006CB403504) ; Major State Basic Research Program of the People's Republic of China(2006CB403504) ; Major State Basic Research Program of the People's Republic of China(2006CB403504) ; 40873026) ; 40873026) ; 40873026) ; 40873026) ; National Natural Science Foundation of China(90914008 ; National Natural Science Foundation of China(90914008 ; National Natural Science Foundation of China(90914008 ; National Natural Science Foundation of China(90914008 ; Chinese Academy of Sciences(KZCX2-YW-QN115) ; Chinese Academy of Sciences(KZCX2-YW-QN115) ; Chinese Academy of Sciences(KZCX2-YW-QN115) ; Chinese Academy of Sciences(KZCX2-YW-QN115) ; Major State Basic Research Program of the People's Republic of China(2006CB403504) ; Major State Basic Research Program of the People's Republic of China(2006CB403504) ; Major State Basic Research Program of the People's Republic of China(2006CB403504) ; Major State Basic Research Program of the People's Republic of China(2006CB403504) ; 40873026) ; 40873026) ; 40873026) ; 40873026) ; National Natural Science Foundation of China(90914008 ; National Natural Science Foundation of China(90914008 ; National Natural Science Foundation of China(90914008 ; National Natural Science Foundation of China(90914008 ; Chinese Academy of Sciences(KZCX2-YW-QN115) ; Chinese Academy of Sciences(KZCX2-YW-QN115) ; Chinese Academy of Sciences(KZCX2-YW-QN115) ; Chinese Academy of Sciences(KZCX2-YW-QN115) ; Major State Basic Research Program of the People's Republic of China(2006CB403504) ; Major State Basic Research Program of the People's Republic of China(2006CB403504) ; Major State Basic Research Program of the People's Republic of China(2006CB403504) ; Major State Basic Research Program of the People's Republic of China(2006CB403504) ; 40873026) ; 40873026) ; 40873026) ; 40873026) ; National Natural Science Foundation of China(90914008 ; National Natural Science Foundation of China(90914008 ; National Natural Science Foundation of China(90914008 ; National Natural Science Foundation of China(90914008 ; Chinese Academy of Sciences(KZCX2-YW-QN115) ; Chinese Academy of Sciences(KZCX2-YW-QN115) ; Chinese Academy of Sciences(KZCX2-YW-QN115) ; Chinese Academy of Sciences(KZCX2-YW-QN115) ; Major State Basic Research Program of the People's Republic of China(2006CB403504) ; Major State Basic Research Program of the People's Republic of China(2006CB403504) ; Major State Basic Research Program of the People's Republic of China(2006CB403504) ; Major State Basic Research Program of the People's Republic of China(2006CB403504) ; 40873026) ; 40873026) ; 40873026) ; 40873026)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/73158]
专题	中国科学院地质与地球物理研究所
通讯作者	Zhang, Xiaohui
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Curtin Univ Technol, Dept Appl Geol, Perth, WA 6845, Australia
推荐引用方式 GB/T 7714	Zhang, Xiaohui,Zhang, Hongfu,Jiang, Neng,et al. Contrasting Middle Jurassic and Early Cretaceous mafic intrusive rocks from western Liaoning, North China craton: petrogenesis and tectonic implications[J]. GEOLOGICAL MAGAZINE,2010,147(6):844-859.
APA	Zhang, Xiaohui,Zhang, Hongfu,Jiang, Neng,&Wilde, Simon A..(2010).Contrasting Middle Jurassic and Early Cretaceous mafic intrusive rocks from western Liaoning, North China craton: petrogenesis and tectonic implications.GEOLOGICAL MAGAZINE,147(6),844-859.
MLA	Zhang, Xiaohui,et al."Contrasting Middle Jurassic and Early Cretaceous mafic intrusive rocks from western Liaoning, North China craton: petrogenesis and tectonic implications".GEOLOGICAL MAGAZINE 147.6(2010):844-859.