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Petrogenesis of coeval silica-saturated and silica-undersaturated alkaline rocks: Mineralogical and geochemical evidence from the Saima alkaline complex, NE China

文献类型：期刊论文

作者Zhu, Yu-Sheng1,2; Yang, Jin-Hui1; Sun, Jin-Feng2; Zhang, Ji-Heng2; Wu, Fu-Yuan1
刊名JOURNAL OF ASIAN EARTH SCIENCES
出版日期2016-03-01
卷号117页码:184-207
关键词Petrogenesis Alkaline magmatism Assimilation and fractional crystallization (AFC) Syenites Saima alkaline complex, NE China
DOI10.1016/j.jseaes.2015.12.014
文献子类Article
英文摘要A combined study of zircon U-Pb ages, mineral chemistry, whole-rock elements and Sr-Nd-Hf isotopes was carried out for the Saima alkaline complex in the northeastern China, in order to investigate the source and petrogenesis of coeval silica-saturated and silica-undersaturated alkaline rocks. The Saima alkaline complex consists of nepheline syenites, quartz-bearing syenites and alkaline volcanic rocks (i.e., phonolite and trachyte), with minor mafic dikes and carbonatitic veins. Laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS) and secondary ion mass spectrometry (SIMS) zircon U-Pb dating gives consistent ages of 230-224 Ma for these rocks, suggesting that they are coeval. All alkaline rocks in the Saima complex are enriched in large ion lithophile elements (LILEs) and light rare earth elements (LREEs), and depleted in high field strength elements (HFSEs) with significant negative Nb, Ta and Ti anomalies. Geochemical data and Sr-Nd-Hf isotopic compositions indicate that the various alkaline rocks were all derived from partial melting of an ancient, re-enriched lithospheric mantle in the garnet stability field, but experienced variable siliceous- or carbonate-rich crustal contamination. Based on petrographic evidence, mineral compositions, and whole-rock geochemical data, two distinct magmatic evolutionary trends are proposed to explain the coeval emplacement of the various rock types within the Saima alkaline complex. The silica-undersaturated rocks (nepheline syenites and phonolites) result from alkali feldspar + apatite + titanite crystal fractionation of an alkaline mafic parental melt combined with assimilation of marine carbonate host rocks. In contrast, the generation of silica-saturated rocks (quartz-bearing syenites and trachytes) may be attributed to subsequent and continued clinopyroxene + apatite + biotite crystal fractionation coupled with assimilation of siliceous sediments. (C) 2015 Elsevier Ltd. All rights reserved.
WOS关键词ZIRCON U-PB ; PALEOPROTEROZOIC CRUSTAL EVOLUTION ; TRACE-ELEMENT GEOCHEMISTRY ; HF ISOTOPIC EVIDENCE ; MG-NUMBER SIGNATURE ; SINO-KOREAN CRATON ; LIAO-JI BELT ; NORTH-CHINA ; LU-HF ; EASTERN BLOCK
WOS研究方向Geology
语种英语
WOS记录号WOS:000370111000015
资助机构National Natural Science Foundation of China(41221002 ; National Natural Science Foundation of China(41221002 ; National Natural Science Foundation of China(41221002 ; National Natural Science Foundation of China(41221002 ; 40925007) ; 40925007) ; 40925007) ; 40925007) ; National Natural Science Foundation of China(41221002 ; National Natural Science Foundation of China(41221002 ; National Natural Science Foundation of China(41221002 ; National Natural Science Foundation of China(41221002 ; 40925007) ; 40925007) ; 40925007) ; 40925007)
源URL[http://ir.iggcas.ac.cn/handle/132A11/62045]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, POB 9825, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Zhu, Yu-Sheng,Yang, Jin-Hui,Sun, Jin-Feng,et al. Petrogenesis of coeval silica-saturated and silica-undersaturated alkaline rocks: Mineralogical and geochemical evidence from the Saima alkaline complex, NE China[J]. JOURNAL OF ASIAN EARTH SCIENCES,2016,117:184-207.
APA Zhu, Yu-Sheng,Yang, Jin-Hui,Sun, Jin-Feng,Zhang, Ji-Heng,&Wu, Fu-Yuan.(2016).Petrogenesis of coeval silica-saturated and silica-undersaturated alkaline rocks: Mineralogical and geochemical evidence from the Saima alkaline complex, NE China.JOURNAL OF ASIAN EARTH SCIENCES,117,184-207.
MLA Zhu, Yu-Sheng,et al."Petrogenesis of coeval silica-saturated and silica-undersaturated alkaline rocks: Mineralogical and geochemical evidence from the Saima alkaline complex, NE China".JOURNAL OF ASIAN EARTH SCIENCES 117(2016):184-207.

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来源：地质与地球物理研究所

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