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Magma mixing controlling the origin of the Early Cretaceous Fangshan granitic pluton, North China Craton In situ U-Pb age and Sr-, Nd-, Hf- and O-isotope evidence

文献类型：期刊论文

作者Sun, Jin-Feng1,2; Yang, Jin-Hui1; Wu, Fu-Yuan1; Li, Xian-Hua1; Yang, Yue-Heng1; Xie, Lie-Wen1; Wilde, Simon A.3
刊名LITHOS
出版日期2010-12-01
卷号120期号:3-4页码:421-438
关键词Mafic microgranular enclaves (MMEs) Accessory minerals In situ Hf O Nd and Sr isotope analysis North China Craton Cretaceous granitoids
ISSN号0024-4937
DOI10.1016/j.lithos.2010.09.002
文献子类Article
英文摘要In situ U-Pb age and Sr- Nd- Hf and O- isotope analysis of accessory minerals (zircon apatite and titanite) have been obtained for mafic microgranular enclaves and their host granites from the Early Cretaceous Fangshan pluton in the North China Craton in order to constrain their sources and petrogenesis The Fangshan pluton is composed of quartz monzodiorite at the margins and granodiorite with abundant mafic microgranular enclaves in the core Zircons from the marginal quartz monzodionte record U-Pb ages of 130 to 133 Ma identical to those of granodiorite in the core The enclaves have zircon U-Pb ages of 133 to 134 Ma identical within error to those of the host granodiorite establishing that the mafic and felsic magmas were coeval Furthermore apatite and florae from the enclaves and host granodiorite have the same U-Pb ages as the zircons indicating rapid cooling of the Fangshan pluton The granodiorites have relatively high SiO(2) and low MgO concentrations They have variable negative epsilon(Hf)(t) values of 25 1 to 182 and delta(18)O values for zircon of 6 2 parts per thousand to 8 3 parts per thousand The negative epsilon(Nd)(t) values of 197 to 140 for titanite and apatite with initial (87)Sr/(86)Sr ratios of 0 7052-0 7058 for apatite indicate that they were derived from an ancient lower crustal source with addition of materials with higher epsilon(Hf)(t) and epsilon(Nd)(t) values and low delta(18)O values The enclaves have relatively high MgO contents (up to 15 5 wt %) at intermediate silica concentrations indicating that their parental magmas were derived from a mantle source Their zircons have strongly negative Hf isotopic compositions (epsilon(Hf)(t) = 229 to 149) The Nd isotopic composition of titanite and apatite is also strongly negative (epsilon(Nd)(t) = 176 to 12 1) All these features combined with the delta(18)O zircon values of 4 8 parts per thousand-8 2 parts per thousand for zircons and relatively low initial Sr isotopic compositions of apatite (initial (87)Sr/(86)Sr = 0 7051-0 7058) indicate that they were derived from an enriched and/or depleted mantle source but with Involvement of crustal materials The marginal quartz monzodiorites have transitional geochernical features between those of the enclaves and host granodiorites In situ Sr Nd Hf and 0 isotopic data of accessory minerals coupled with field observations and whole rock geochemical data rule-out simple crystal-liquid fractionation or wall-rock contamination as the major genetic link between the enclaves and host rocks Instead mixing of mantle-derived mafic magmas with crustal-derived felsic magmas coupled with assimilation of wall rocks is compatible with the data Our study shows that in situ Hf 0 Nd and Sr isotopic analyses of accessory minerals are powerful geochemical tracers that provide unique petrogenetic information regarding the origin of granitoids Crown Copyright (C) 2010 Published by Elsevier B V All rights reserved
WOS关键词LACHLAN FOLD BELT ; MC-ICP-MS ; METAMORPHIC CORE COMPLEX ; TRACE-ELEMENT ; CRUSTAL EVOLUTION ; LU-HF ; GROUNDMASS PEROVSKITE ; PETROGENETIC MODELS ; TECTONIC EVOLUTION ; NATURAL ZIRCON
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
WOS记录号WOS:000285706600012
出版者ELSEVIER SCIENCE BV
资助机构NSFC(40925007 ; NSFC(40925007 ; NSFC(40925007 ; NSFC(40925007 ; State Key Laboratory of Lithospheric Evolution(Zhuan0809) ; State Key Laboratory of Lithospheric Evolution(Zhuan0809) ; State Key Laboratory of Lithospheric Evolution(Zhuan0809) ; State Key Laboratory of Lithospheric Evolution(Zhuan0809) ; 40873010) ; 40873010) ; 40873010) ; 40873010) ; NSFC(40925007 ; NSFC(40925007 ; NSFC(40925007 ; NSFC(40925007 ; State Key Laboratory of Lithospheric Evolution(Zhuan0809) ; State Key Laboratory of Lithospheric Evolution(Zhuan0809) ; State Key Laboratory of Lithospheric Evolution(Zhuan0809) ; State Key Laboratory of Lithospheric Evolution(Zhuan0809) ; 40873010) ; 40873010) ; 40873010) ; 40873010) ; NSFC(40925007 ; NSFC(40925007 ; NSFC(40925007 ; NSFC(40925007 ; State Key Laboratory of Lithospheric Evolution(Zhuan0809) ; State Key Laboratory of Lithospheric Evolution(Zhuan0809) ; State Key Laboratory of Lithospheric Evolution(Zhuan0809) ; State Key Laboratory of Lithospheric Evolution(Zhuan0809) ; 40873010) ; 40873010) ; 40873010) ; 40873010) ; NSFC(40925007 ; NSFC(40925007 ; NSFC(40925007 ; NSFC(40925007 ; State Key Laboratory of Lithospheric Evolution(Zhuan0809) ; State Key Laboratory of Lithospheric Evolution(Zhuan0809) ; State Key Laboratory of Lithospheric Evolution(Zhuan0809) ; State Key Laboratory of Lithospheric Evolution(Zhuan0809) ; 40873010) ; 40873010) ; 40873010) ; 40873010)
源URL[http://ir.iggcas.ac.cn/handle/132A11/72236]  
专题中国科学院地质与地球物理研究所
通讯作者Yang, Jin-Hui
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100029, Peoples R China
3.Curtin Univ Technol, Dept Appl Geol, Perth, WA 6845, Australia
推荐引用方式
GB/T 7714		 Sun, Jin-Feng,Yang, Jin-Hui,Wu, Fu-Yuan,et al. Magma mixing controlling the origin of the Early Cretaceous Fangshan granitic pluton, North China Craton In situ U-Pb age and Sr-, Nd-, Hf- and O-isotope evidence[J]. LITHOS,2010,120(3-4):421-438.
APA Sun, Jin-Feng.,Yang, Jin-Hui.,Wu, Fu-Yuan.,Li, Xian-Hua.,Yang, Yue-Heng.,...&Wilde, Simon A..(2010).Magma mixing controlling the origin of the Early Cretaceous Fangshan granitic pluton, North China Craton In situ U-Pb age and Sr-, Nd-, Hf- and O-isotope evidence.LITHOS,120(3-4),421-438.
MLA Sun, Jin-Feng,et al."Magma mixing controlling the origin of the Early Cretaceous Fangshan granitic pluton, North China Craton In situ U-Pb age and Sr-, Nd-, Hf- and O-isotope evidence".LITHOS 120.3-4(2010):421-438.

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来源：地质与地球物理研究所

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