中国科学院机构知识库网格系统: Late Jurassic high silica granites from the border area between Liaoning and Inner Mongolia: Petrogenesis and tectonic implication

Late Jurassic high silica granites from the border area between Liaoning and Inner Mongolia: Petrogenesis and tectonic implication

文献类型：期刊论文


作者	Yang ZhiLi 1,2,4; Zhang XiaoHui 1,4; Yuan LingLing 3
刊名	ACTA PETROLOGICA SINICA
出版日期	2021-04-01
卷号	37 期号:4 页码:1061-1081
关键词	Late Jurassic High silica granites Geochemistry Petrogenesis Stitching pluton North China Craton
ISSN号	1000-0569
DOI	10.18654/1000-0569/2021.04.07
英文摘要	High silica ( > 70% SiO2) granites not only present important hallmarks for the maturity of continental crust, but also encapsulate essential information for calibrating the mechanism of continental crustal differentiation and the mobility behavior of rare metal elements. This study documents one pivotal occurrence of Mesozoic high -silica granites from the border area between Liaoning and Inner Mongolia that coincides with the boundary between the North China Craton ( NCC) and Central Asian Orogenic belt ( CAOB), i. e., the Baiyinhua batholith. SIMS zircon U-Pb dating yields a well -constrained Late Jurassic emplacement age of ca. 162 similar to 161Ma for the batholith. The rocks range in SiO2 content from 75. 7% to 77. 3%, and exhibit calc-alkali and weakly peraluminous affinities. They are enriched in Th and U but depleted in Ba and Sr, with low rare earth element abundance ( Sigma REE = 40. 2 x 10(-6) similar to 117 x 10(-6)), strong negative Eu anomalies (delta Eu = 0. 10 similar to 0. 47) as well as fractionated Zr/Hf and Na/Ta. These elemental features are typical of highly fractionated I-type felsic magmas. With respect to isotopic composition, the granites are characterized with whole rock epsilon(Nd)(i) of-3. 5 similar to-2. 6 and zircon epsilon(Hf),( t) of + 0. 1 similar to +5. 9. These elemental and isotopic characters suggest that the parental magma for the Baiyinhua granites might derive from the partial melting of a composite middle crustal protolith containing dominant relaminated juvenile intermediate plutonic components and minor ancient crustal ingredients, while its prolonged fractional crystallization culminated in the formation of high-silica granites. Acting as a kind of anorogenic stitching pluton indicative of Late Jurassic extensional/strike slip activities along the boundary faults between the NCC and the CAOB, the Baiyinhua granites might witness the prevalent diffusive middle-lower crustal extension in the newly-amalgamated North China-Mongolia plate during Middle-Late Jurassic, which is distinct from large-scale Early Cretaceous upper crustal extention. Such consistent two-stage extensional pattern across the NE continental Asia not only tends to agree well with the post-orogenic gravitational collapse in the northern Mongol-Okhotsk tectonic regime, but also is conducive to facilitating the vertical differentiation and maturation of the continental crust in the North China-Mongolia plate.
WOS关键词	NORTH CHINA CRATON ; ASIAN OROGENIC BELT ; I-TYPE GRANITES ; A-TYPE GRANITES ; METAMORPHIC CORE COMPLEXES ; U-PB ; CONTINENTAL-CRUST ; FRACTIONATED GRANITES ; PERALUMINOUS GRANITES ; OKHOTSK OCEAN
WOS研究方向	Geology
语种	英语
WOS记录号	WOS:000653537300007
出版者	SCIENCE PRESS
源URL	[http://ir.iggcas.ac.cn/handle/132A11/102032]
专题	地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者	Zhang XiaoHui
作者单位	1.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Cent South Univ, Sch Geosci & Infophys, MOE Key Lab Metallogen Predict Nonferrous Met & G, Changsha 410083, 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	Yang ZhiLi,Zhang XiaoHui,Yuan LingLing. Late Jurassic high silica granites from the border area between Liaoning and Inner Mongolia: Petrogenesis and tectonic implication[J]. ACTA PETROLOGICA SINICA,2021,37(4):1061-1081.
APA	Yang ZhiLi,Zhang XiaoHui,&Yuan LingLing.(2021).Late Jurassic high silica granites from the border area between Liaoning and Inner Mongolia: Petrogenesis and tectonic implication.ACTA PETROLOGICA SINICA,37(4),1061-1081.
MLA	Yang ZhiLi,et al."Late Jurassic high silica granites from the border area between Liaoning and Inner Mongolia: Petrogenesis and tectonic implication".ACTA PETROLOGICA SINICA 37.4(2021):1061-1081.

入库方式： OAI收割

来源：地质与地球物理研究所

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Late Jurassic high silica granites from the border area between Liaoning and Inner Mongolia: Petrogenesis and tectonic implication

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