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Penglai Zircon Megacrysts: A Potential New Working Reference Material for Microbeam Determination of Hf-O Isotopes and U-Pb Age

文献类型：期刊论文

作者Li, Xian-Hua1,2; Long, Weng-Guo2; Li, Qiu-Li1; Liu, Yu1; Zheng, Yong-Fei3; Yang, Yue-Heng1; Chamberlain, Kevin R.4; Wan, De-Fang5; Guo, Cun-Hua1; Wang, Xuan-Ce1
刊名GEOSTANDARDS AND GEOANALYTICAL RESEARCH
出版日期2010-06-01
卷号34期号:2页码:117-134
关键词Zircon Reference Material Penglai U-pb Age Hf Isotopes o Isotopes Sims La-mc-icp-ms Zircons De Reference Penglai Ages U-pb Isotopes De L'hf Isotopes De L'o Sims La-mc-icp-ms
ISSN号1639-4488
文献子类Article
英文摘要We introduce a potential new working reference material - natural zircon megacrysts from an Early Pliocene alkaline basalt (from Penglai, northern Hainan Island, southern China) - for the microbeam determination of O and Hf isotopes, and U-Pb age dating. The Penglai zircon megacrysts were found to be fairly homogeneous in Hf and O isotopes based on large numbers of measurements by LA-multiple collector (MC)-ICP-MS and SIMS, respectively. Precise determinations of O isotopes by isotope ratio mass spectrometry (IRMS) and Hf isotopes by solution MC-ICP-MS were in good agreement with the statistical mean of microbeam measurements. The mean delta 18O value of 5.31 +/- 0.10 parts per thousand (2s) by IRMS and the mean 176Hf/177Hf value of 0.282906 +/- 0.0000010 (2s) by solution MC-ICP-MS are the best reference values for the Penglai zircons. SIMS and isotope dilution-TIMS measurements yielded consistent 206Pb/238U ages within analytical uncertainties, and the preferred 206Pb/238U age was found to be 4.4 +/- 0.1 Ma (95% confidence interval). The young age and variably high common Pb content make the Penglai zircons unsuitable as a primary U-Pb age reference material for calibration of unknown samples by microbeam analysis; however, they can be used as a secondary working reference material for quality control of U-Pb age determination for young (particularly < 10 Ma) zircon samples.Nous proposons un nouveau materiel de reference potentiel - des megacristaux de zircon naturel provenant d'un basalte alcalin du debut du pliocene (region de Penglai, nord de l'ile de Hainan, Chine meridionale) destinea l'analyse microfaisceaux des isotopes de l'O et de l'Hf, et la datation U-Pb. Les megacristaux de zircon de Penglai se sont reveles, apres un grand nombre de mesures par LA-MC-ICP-MS et SIMS, assez homogenes en terme d'isotopes de l'O et de l'Hf. Les determinations precises des isotopes de l'O par IRMS et des isotopes de l'Hf par MC-ICP-MS solution sont en bon accord avec la moyenne statistique des analyses microfaisceaux. La valeur moyenne delta 18O de 5.31 +/- 0.10 parts per thousand (2s) par IRMS et la valeur moyenne 176Hf/177Hf de 0.282906 +/- 0.0000010 (2s) par solution MC-ICP-MS sont les meilleures valeurs de reference pour les zircons de Penglai. Les mesures SIMS ainsi que celles par dilution isotopique-TIMS donnent, compte tenu des incertitudes analytiques, des ages 206Pb/238U conformes, et l'age prefere206Pb/238U est estimea 4.4 +/- 0.10 Ma (intervalle de confiance de 95%). Leur jeune age et leurs teneurs variables et elevees en Pb commun font que les zircons de Penglai ne sont pas utilisables comme materiel de reference primaire pour l'etalonnage d'echantillons inconnus dont les ages U-Pb doivent etre determines par analyses microfaisceaux; Toutefois, ils peuvent etre utilises comme materiel de reference secondaire pour le controle qualite de la determination de l'age U-Pb des zircons jeunes (en particulier pour ceux < 10 Ma).
WOS关键词IN-SITU ; HIGH-PRECISION ; TRACE-ELEMENT ; EXCIMER-LASER ; ICP-MS ; OXYGEN ; GEOCHRONOLOGY ; ACCURACY ; RATIOS ; MICROANALYSIS
WOS研究方向Geology
语种英语
WOS记录号WOS:000281678600003
出版者WILEY-BLACKWELL PUBLISHING, INC
资助机构Ministry of Science and Technology of China(2007AA06Z126 ; Ministry of Science and Technology of China(2007AA06Z126 ; Institute of Geology and Geophysics, Chinese Academy of Sciences(Z0908) ; Institute of Geology and Geophysics, Chinese Academy of Sciences(Z0908) ; 2007CB411403) ; 2007CB411403) ; Ministry of Science and Technology of China(2007AA06Z126 ; Ministry of Science and Technology of China(2007AA06Z126 ; Institute of Geology and Geophysics, Chinese Academy of Sciences(Z0908) ; Institute of Geology and Geophysics, Chinese Academy of Sciences(Z0908) ; 2007CB411403) ; 2007CB411403) ; Ministry of Science and Technology of China(2007AA06Z126 ; Ministry of Science and Technology of China(2007AA06Z126 ; Institute of Geology and Geophysics, Chinese Academy of Sciences(Z0908) ; Institute of Geology and Geophysics, Chinese Academy of Sciences(Z0908) ; 2007CB411403) ; 2007CB411403) ; Ministry of Science and Technology of China(2007AA06Z126 ; Ministry of Science and Technology of China(2007AA06Z126 ; Institute of Geology and Geophysics, Chinese Academy of Sciences(Z0908) ; Institute of Geology and Geophysics, Chinese Academy of Sciences(Z0908) ; 2007CB411403) ; 2007CB411403)
源URL[http://ir.iggcas.ac.cn/handle/132A11/73136]  
专题中国科学院地质与地球物理研究所
通讯作者Li, Xian-Hua
作者单位1.Chinese Acad Sci, State Key Lab Lithospher Evolut, Inst Geol & Geophys, Beijing 100027, Peoples R China
2.Chinese Acad Sci, Key Lab Isotope Geochronol & Geochem, Guangzhou Inst Geochem, Guangzhou 510640, Guangdong, Peoples R China
3.Univ Sci & Technol China, CAS Key Lab Crust Mantle Mat & Environm, Sch Earth & Space Sci, Hefei 230026, Peoples R China
4.Univ Wyoming, Dept Geol & Geophys, Laramie, WY 82071 USA
5.Chinese Acad Geol Sci, Inst Mineral Resources, Beijing 100037, Peoples R China
推荐引用方式
GB/T 7714		 Li, Xian-Hua,Long, Weng-Guo,Li, Qiu-Li,et al. Penglai Zircon Megacrysts: A Potential New Working Reference Material for Microbeam Determination of Hf-O Isotopes and U-Pb Age[J]. GEOSTANDARDS AND GEOANALYTICAL RESEARCH,2010,34(2):117-134.
APA Li, Xian-Hua.,Long, Weng-Guo.,Li, Qiu-Li.,Liu, Yu.,Zheng, Yong-Fei.,...&Tao, Hua.(2010).Penglai Zircon Megacrysts: A Potential New Working Reference Material for Microbeam Determination of Hf-O Isotopes and U-Pb Age.GEOSTANDARDS AND GEOANALYTICAL RESEARCH,34(2),117-134.
MLA Li, Xian-Hua,et al."Penglai Zircon Megacrysts: A Potential New Working Reference Material for Microbeam Determination of Hf-O Isotopes and U-Pb Age".GEOSTANDARDS AND GEOANALYTICAL RESEARCH 34.2(2010):117-134.

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来源：地质与地球物理研究所

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