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High-precision Mg isotope analyses of low-Mg rocks by MC-ICP-MS
An, Yajun1; Wu, Fei1; Xiang, Yuanxin2; Nan, Xiaoyun1; Yu, Xun3; Yang, Jinhui2; Yu, Huimin1; Xie, Liewen2; Huang, Fang1
2014-12-18
发表期刊CHEMICAL GEOLOGY
ISSN0009-2541
卷号390页码:9-21
文章类型Article
摘要We present a method for precise measurement of Mg isotope ratios for low-Mg rock samples (where MgO <1 wt.%) by multi-collector inductively coupled plasma-mass spectrometry (MC-ICP-MS). The efficiency of Mg purification is significantly improved by using a newly calibrated HNO3 + HF step to remove undesired matrix elements (such as Ti, Al, Fe, and K) in low-Mg samples. We also establish that increasing the amount of Mg loaded to the chromatographic column minimized blank effects of organics leached from cation resin. All parameters that could affect the accuracy and precision of Mg isotope analyses were rigorously examined by two independent laboratories in Beijing and Hefei. The delta Mg-26 of mono-elemental Mg standard CAM-1 measured in the two laboratories were -2.597 +/- 0.042 parts per thousand (2 sigma, n = 49) and -2.598 +/- 0.039 parts per thousand (2 sigma, n = 79), respectively; in house standard IGGMg1 were -1.742 +/- 0.041 parts per thousand (2 sigma, n = 53) and -1.749 +/- 0.049 parts per thousand (2 sigma, n = 72), respectively. The average delta Mg-26 over ten months of two synthetic standards, made by doping IGGMg1 and IGGMg2 with matrix elements, agrees well with their recommended values, within error. The robustness of our method was further assessed by replicated analyses of sixteen rock standards with MgO contents from 0.28 wt.% to 49.4 wt.%. The delta Mg-26 of USGS rhyolite standards RGM-1 and RGM-2 are -0.188 +/- 0.031 parts per thousand (2 sigma, n = 35) and -0.182 +/- 0.041 parts per thousand (2 sigma, n = 72), respectively; granite standard GA is -0.165 +/- 0.038 parts per thousand (2 sigma, n = 57), G-2 is -0.129 +/- 0.045 parts per thousand (2 sigma, n = 34), GS-N is -0.204 +/- 0.059 parts per thousand (2 sigma, n = 33), GSP-2 is 0.042 +/- 0.020 parts per thousand (2 sigma, n = 15), and GSR-1 is -0.234 +/- 0.016 parts per thousand (2 sigma, n = 17). Based on repeated analyses of standards, the long-term external precision of our method is better than +/- 0.05 parts per thousand for delta Mg-26. This precision allows us to distinguish the fractionation of Mg isotopes in low-Mg granites and rhyolites as well as that between mantle minerals. (C) 2014 Elsevier B.V. All rights reserved.
关键词Mg isotopes MC-ICP-MS Low-Mg samples
WOS标题词Science & Technology ; Physical Sciences
DOI10.1016/j.chemgeo.2014.09.014
资助者National Science Foundation of China(41173031 ; National Science Foundation of China(41173031 ; National Science Foundation of China(41173031 ; National Science Foundation of China(41173031 ; 111 Project ; 111 Project ; 111 Project ; 111 Project ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(SKL1301) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(SKL1301) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(SKL1301) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(SKL1301) ; 41325011 ; 41325011 ; 41325011 ; 41325011 ; 40873009) ; 40873009) ; 40873009) ; 40873009) ; National Science Foundation of China(41173031 ; National Science Foundation of China(41173031 ; National Science Foundation of China(41173031 ; National Science Foundation of China(41173031 ; 111 Project ; 111 Project ; 111 Project ; 111 Project ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(SKL1301) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(SKL1301) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(SKL1301) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(SKL1301) ; 41325011 ; 41325011 ; 41325011 ; 41325011 ; 40873009) ; 40873009) ; 40873009) ; 40873009) ; National Science Foundation of China(41173031 ; National Science Foundation of China(41173031 ; National Science Foundation of China(41173031 ; National Science Foundation of China(41173031 ; 111 Project ; 111 Project ; 111 Project ; 111 Project ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(SKL1301) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(SKL1301) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(SKL1301) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(SKL1301) ; 41325011 ; 41325011 ; 41325011 ; 41325011 ; 40873009) ; 40873009) ; 40873009) ; 40873009) ; National Science Foundation of China(41173031 ; National Science Foundation of China(41173031 ; National Science Foundation of China(41173031 ; National Science Foundation of China(41173031 ; 111 Project ; 111 Project ; 111 Project ; 111 Project ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(SKL1301) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(SKL1301) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(SKL1301) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(SKL1301) ; 41325011 ; 41325011 ; 41325011 ; 41325011 ; 40873009) ; 40873009) ; 40873009) ; 40873009)
关键词[WOS]PLASMA-MASS SPECTROMETRY ; NORTH CHINA CRATON ; PERIDOTITE XENOLITHS ; MAGNESIUM ISOTOPES ; RATIO MEASUREMENTS ; CONTINENTAL-CRUST ; FRACTIONATION ; MANTLE ; EARTH ; SYSTEMATICS
收录类别SCI
语种英语
资助者National Science Foundation of China(41173031 ; National Science Foundation of China(41173031 ; National Science Foundation of China(41173031 ; National Science Foundation of China(41173031 ; 111 Project ; 111 Project ; 111 Project ; 111 Project ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(SKL1301) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(SKL1301) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(SKL1301) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(SKL1301) ; 41325011 ; 41325011 ; 41325011 ; 41325011 ; 40873009) ; 40873009) ; 40873009) ; 40873009) ; National Science Foundation of China(41173031 ; National Science Foundation of China(41173031 ; National Science Foundation of China(41173031 ; National Science Foundation of China(41173031 ; 111 Project ; 111 Project ; 111 Project ; 111 Project ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(SKL1301) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(SKL1301) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(SKL1301) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(SKL1301) ; 41325011 ; 41325011 ; 41325011 ; 41325011 ; 40873009) ; 40873009) ; 40873009) ; 40873009) ; National Science Foundation of China(41173031 ; National Science Foundation of China(41173031 ; National Science Foundation of China(41173031 ; National Science Foundation of China(41173031 ; 111 Project ; 111 Project ; 111 Project ; 111 Project ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(SKL1301) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(SKL1301) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(SKL1301) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(SKL1301) ; 41325011 ; 41325011 ; 41325011 ; 41325011 ; 40873009) ; 40873009) ; 40873009) ; 40873009) ; National Science Foundation of China(41173031 ; National Science Foundation of China(41173031 ; National Science Foundation of China(41173031 ; National Science Foundation of China(41173031 ; 111 Project ; 111 Project ; 111 Project ; 111 Project ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(SKL1301) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(SKL1301) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(SKL1301) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(SKL1301) ; 41325011 ; 41325011 ; 41325011 ; 41325011 ; 40873009) ; 40873009) ; 40873009) ; 40873009)
WOS研究方向Geochemistry & Geophysics
WOS类目Geochemistry & Geophysics
WOS记录号WOS:000345442400002
出版者ELSEVIER SCIENCE BV
引用统计
文献类型期刊论文
条目标识符http://ir.iggcas.ac.cn/handle/132A11/85562
专题中国科学院地质与地球物理研究所
通讯作者Xie, Liewen
作者单位1.Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Crust Mantle Mat & Environm, Hefei 230026, Anhui, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
3.Nanjing Univ, Sch Earth Sci & Engn, State Key Lab Mineral Deposits Res, Nanjing 210093, Jiangsu, Peoples R China
通讯作者单位岩石圈演化国家重点实验室
推荐引用方式
GB/T 7714		 An, Yajun,Wu, Fei,Xiang, Yuanxin,et al. High-precision Mg isotope analyses of low-Mg rocks by MC-ICP-MS[J]. CHEMICAL GEOLOGY,2014,390:9-21.
APA An, Yajun.,Wu, Fei.,Xiang, Yuanxin.,Nan, Xiaoyun.,Yu, Xun.,...&Huang, Fang.(2014).High-precision Mg isotope analyses of low-Mg rocks by MC-ICP-MS.CHEMICAL GEOLOGY,390,9-21.
MLA An, Yajun,et al."High-precision Mg isotope analyses of low-Mg rocks by MC-ICP-MS".CHEMICAL GEOLOGY 390(2014):9-21.
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