In situ boron isotope analysis method for tourmaline and muscovite by LA-MC-ICPMS and its applications

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    The combination of multi-collector inductively coupled plasma mass spectrometry (MC-ICPMS) and laser ablation provides a useful tool for tracing the geological process by analyzing minerals under microscales. As one of the non-traditional stable isotopes, boron isotope has attracted more and more attention. In this study, the authors developed an in-situ method for high-precision analysis of B isotope in tourmaline with high-content boron and muscovite with low-content boron. Tourmaline and glass reference materials were applied to correcting the mass fractionation respectively, and in-situ B isotopes of two natural samples from southwestern Tianshan were also tested. In addition, the boron isotope of the in-house standard T-PKU was calibrated as -13.07‰±0.42‰ (2SD, n=66). The above testing results reveal that the condition of LA-MC-ICPMS is stable for a long term and suitable to producing high quality data about tourmaline with minimum spot size of 10 μm and muscovite with > 20×10-6 B concentration. The B isotopes of tourmaline and paragonite in Tianshan samples are helpful for tracing fluids sources.

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徐洁,张贵宾,李楠,蔺梦,王佳兴,2020,LA-MC-ICPMS电气石及白云母原位硼同位素测试方法及应用[J].岩石矿物学杂志,39(3):323~334. XU Jie, ZHANG Gui-bin, LI Nan, LIN Meng, WANG Jia-xing,2020,In situ boron isotope analysis method for tourmaline and muscovite by LA-MC-ICPMS and its applications[J]. Acta Petrologica et Mineralogica,39(3):323~334.

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  • Received:September 20,2019
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  • Online: May 11,2020
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