• 中文核心期刊
  • 中国科技核心期刊
  • CSCD来源期刊
  • DOAJ 收录
  • Scopus 收录
高级搜索

高Rb/Sr岩石样品中Sr同位素多接收等离子体质谱分析校正方法研究

戴梦宁, 宗春蕾, 袁洪林

戴梦宁, 宗春蕾, 袁洪林. 高Rb/Sr岩石样品中Sr同位素多接收等离子体质谱分析校正方法研究[J]. 岩矿测试, 2012, 31(1): 95-102.
引用本文: 戴梦宁, 宗春蕾, 袁洪林. 高Rb/Sr岩石样品中Sr同位素多接收等离子体质谱分析校正方法研究[J]. 岩矿测试, 2012, 31(1): 95-102.
shu
DAI Meng-ning, ZONG Chun-lei, YUAN Hong-lin. A Calibration Strategy of 87Sr/86Sr Ratio for Rocks with High Rb/Sr Measured by Multiple Collector-Inductively Coupled Plasma-Mass Spectrometry[J]. Rock and Mineral Analysis, 2012, 31(1): 95-102.
Citation: DAI Meng-ning, ZONG Chun-lei, YUAN Hong-lin. A Calibration Strategy of 87Sr/86Sr Ratio for Rocks with High Rb/Sr Measured by Multiple Collector-Inductively Coupled Plasma-Mass Spectrometry[J]. Rock and Mineral Analysis, 2012, 31(1): 95-102.
shu

高Rb/Sr岩石样品中Sr同位素多接收等离子体质谱分析校正方法研究

  • 1.

    大陆动力学国家重点实验室, 西北大学地质学系, 陕西 西安 710069

  • 2.

    大陆动力学国家重点实验室, 西北大学地质学系, 陕西 西安 710069

  • 3.

    大陆动力学国家重点实验室, 西北大学地质学系, 陕西 西安 710069

基金项目: 

西北大学大陆动力学国家重点实验室科技部专项经费(BJ11070)

国家自然科学基金项目(40973011)

A Calibration Strategy of 87Sr/86Sr Ratio for Rocks with High Rb/Sr Measured by Multiple Collector-Inductively Coupled Plasma-Mass Spectrometry

  • 1.

    State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an 710069, China

  • 2.

    State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an 710069, China

  • 3.

    State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an 710069, China

摘要

    摘要
  • 摘要: 在利用多接收电感耦合等离子体质谱(MC-ICPMS)进行Sr同位素研究中,87Rb对于87Sr干扰严重。岩石样品经化学分离后,若Rb/Sr≤0.0005,可以采用传统的Rb干扰扣除方法对87Sr/86Sr测定值进行准确校正;但如果样品经化学分离后仍含有较高的Rb/Sr比,同量异位素的干扰不能完全消除,则无法准确校正87Sr/86Sr测定值,直接影响测试结果的准确度。本文针对Rb含量较高的地质样品设计两组实验,确定了87Sr/86Sr同位素比值与Rb/Sr元素含量比值的关系曲线,并在理论分析的基础上,提出包含同位素分馏校正在内的重叠干扰校正方法。通过实际地质样品验证,该校正方法在较高含量Rb元素共存(Rb/Sr<0.2)的Sr纯化液中,能够较为准确地测量87Sr/86Sr同位素比值,降低了MC-ICPMS分析地质样品中Sr同位素时对化学分离步骤的要求。而对于Rb/Sr>0.2的地质样品,因仪器分馏效应和记忆效应影响,测试精确度大大降低,无论采用何种校正方法均无法得到准确的Sr同位素组成。
    Abstract: The presence of 87Rb causes isobaric interference of 87Sr for Multiple Collector-Inductively Coupled Plasma-Mass Spectrometric (MC-ICPMS) measurements. 87Sr/86Sr isotopic composition of rocks with Rb/Sr≤0.0005 after chromatography separation can be effectively corrected by using a traditional Rb-interference calibration. However, the traditional calibration method is not valid for solutions with high Rb/Sr ratio which cannot completely remove isobaric interference of 87Rb to obtain an accurate 87Sr/86Sr ratio. The two curves of the 87Sr/86Sr isotope ratio and Rb/Sr element content ratio were obtained by two sets of experiments to calibrate Rb interference in this work. Based on theoretical analysis, a new calibration method is reported, including an isotope fractionation calibration. The method yields an accurate 87Sr/86Sr ratio for geology samples with Rb/Sr<0.2 after chemical separation, and reduces requirements of chemical separation for isotope measurements by MC-ICPMS. However, the measurement accuracy for geological samples with Rb/Sr>0.2 after chemical separation was significantly lower due to mass fractionation and memory effect, which can not be calibrated to obtain an accurate Sr isotopic composition by any kind of calibration method.
    • HTML全文
    • 参考文献(16)
  • 韦刚健,梁细荣,李献华,刘颖. (LP)MC-ICPMS方法精确测定液体和固体样品的Sr同位素组成[J].地球化学,2002,21(3): 295-299.
    刘伟,潘小菲,谢烈文,李禾.大兴安岭南段林西地区花岗岩类的源岩:地壳生长的时代和方式[J].岩石学报,2007,23(2): 441-460.
    陈福坤,李秋立,李潮峰,李向辉,王秀丽,王芳.高精度质谱计在同位素地球化学的应用前景[J].地球科学,2005,30(6): 640-645.
    王涛,王增银.桂林地区岩溶水87Sr/86Sr特征[J]. 地球学报,2005,26(Z1): 299-302.
    Zhang H F, Jin L L, Zhang L, Nigel Harris, Zhou L, Hu S H, Zhang B R. Geochemical and Pb-Sr-Nd isotopic compositions of granitoids from western Qinling belt:Constraints on basement nature and tectonic affinity[J]. Science in China,2007,50(7): 184-196.

    Zhang H F, Jin L L, Zhang L, Nigel Harris, Zhou L, Hu S H, Zhang B R. Geochemical and Pb-Sr-Nd isotopic compositions of granitoids from western Qinling belt:Constraints on basement nature and tectonic affinity[J]. Science in China,2007,50(7): 184-196.
    Wei J H, Tan W J, Guo D Z, Tan J, Li Y H, Yan Y F. Isotope systematics and metallogenetic age of Zhuanghe gold deposit Liaoning province China[J]. Journal of Central South University of Technology,2007,14(1): 104-110.

    Wei J H, Tan W J, Guo D Z, Tan J, Li Y H, Yan Y F. Isotope systematics and metallogenetic age of Zhuanghe gold deposit Liaoning province China[J]. Journal of Central South University of Technology,2007,14(1): 104-110.
    杨岳衡,张宏福,吴福元,谢烈文,张艳斌.NEPTUNE多接收器等离子体质谱精确测定锶同位素组成[J].质谱学报,2005,26(4):215-221.
    周炼,苏洁,黄俊华,颜佳新,解习农,高山,戴梦宁,腾格尔.判识缺氧事件的地球化学新标志——钼同位素[J].中国科学:地球科学,2011,41(3): 309-319.
    Suzanne M K, Beatriz L C, Pablo J C, Chen C H. Regional chemical diversity, crustal and mantle sources and evolution of central Andean Puna plateau ignimbrites[J].Journal of Volcanologe and Geothermal Research,2010,198(1-2): 81-111.

    Suzanne M K, Beatriz L C, Pablo J C, Chen C H. Regional chemical diversity, crustal and mantle sources and evolution of central Andean Puna plateau ignimbrites[J].Journal of Volcanologe and Geothermal Research,2010,198(1-2): 81-111.
    蔡宏明,张宏飞,徐旺春,时章亮,袁洪林.松潘带印支期岩石圈拆沉作用新证据:来自火山岩岩石成因的研究[J].中国科学:地球科学,2010,40(11):1518-1532.
    孟凡超,刘嘉麒,李明,刘晓,印长海,陆加敏,崔岩.松辽盆地徐家围子营城组流纹岩地球化学特征及构造指示意义[J].岩石学报,2010,26(1):227-241.
    牛漫兰,朱光,谢成龙,吴齐,刘国生.郯庐断裂带张八岭隆起南段晚中生代侵入岩地球化学特征及其对岩石圈减薄的指示[J].岩石学报,2010,26(9):2783-2804.
    Vroon P Z, Wagt B van der, Koornneef J M, Davies G R. Problems in obtaining precise and accurate Sr isotope analysis from geological materials using laser ablation MC-ICPMS[J]. Analytical and Bioanalytical Chemistry,2008,390: 465-476.

    Vroon P Z, Wagt B van der, Koornneef J M, Davies G R. Problems in obtaining precise and accurate Sr isotope analysis from geological materials using laser ablation MC-ICPMS[J]. Analytical and Bioanalytical Chemistry,2008,390: 465-476.
    李晓彪,肖芳.地质样品中Sr同位素比值测定的Rb干扰校正初探[J]. 矿物学报, 2009,29(Z1):607-608.
    袁洪林,高山,罗彦,宗春蕾,戴梦宁,柳小明,第五春荣 . Lu-Hf年代学研究——以大别榴辉岩为例[J]. 岩石学报,2007,23(2): 233-239.
    Craddock P R,Rouxel O J,Ball L A,Bach W. Sulfur isotope measurement of sulfate and sulfide by high-resolution MC-ICP-MS [J]. Chemical Geology,2008,253(3-4):102-113.

    Craddock P R,Rouxel O J,Ball L A,Bach W. Sulfur isotope measurement of sulfate and sulfide by high-resolution MC-ICP-MS [J]. Chemical Geology,2008,253(3-4):102-113.
    • 相关文章
    • 施引文献
    • 资源附件(0)
计量
  • 文章访问数:  1932
  • HTML全文浏览量:  5
  • PDF下载量:  1407
  • 被引次数: 0
出版历程
  • 收稿日期:  2011-08-24

目录

摘要
HTML全文
    参考文献(16)
    相关文章
    施引文献
    资源附件(0)

    /

    返回文章
    返回

    主管单位：中国科学技术协会 主办单位：中国地质学会；国家地质实验测试中心

    通讯地址：北京市西城区百万庄大街26号 工作邮箱：ykcs_zazhi@163.com 办公电话：010-68999562

    京公网安备 11010202008159号 京ICP备2022024991号

    本系统由 北京仁和汇智信息技术有限公司 开发  百度统计