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

DAI Meng-ning; ZONG Chun-lei; YUAN Hong-lin

Rock and Mineral Analysis > 2012 > 31(1): 95-102.

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:

PDF (2394 KB)

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

More Information

Received Date: August 24, 2011

Abstract

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.
- Rb,
- interference,
- correction,
- Sr

FullText(HTML)

References (16)

References

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.

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.

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.

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.