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首页> 外文期刊>Journal of mass spectrometry: JMS >Simultaneous delta H-2 and delta O-18 analyses of water inclusions in halite with off-axis integrated cavity output spectroscopy
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Simultaneous delta H-2 and delta O-18 analyses of water inclusions in halite with off-axis integrated cavity output spectroscopy

机译：同时δH-2和Delta O-18与轴外集成腔输出光谱分析的水夹杂物

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摘要

Stable isotope compositions of ancient halite fluid inclusions have been recognized to be valuable tools for reconstructing past environments. Nevertheless, in order to better understand the genesis of halite deposits, it could be of great interest to combine both delta H-2 and delta O-18 measurements of the water trapped as inclusions in the defects of the mineral lattice. We developed a method combining off-axis integrated cavity output spectroscopy (OA-ICOS) connected on line with a modified elemental analyzer (EA-OA-ICOS) to perform those measurements. The first step was to test the method with synthetic halite crystals precipitated in the laboratory from isotopically calibrated waters. Water isotopic signatures have been measured with conventional techniques, equilibration for delta O-18 and chromium reduction for delta H-2. Then, we modified and optimized a conventional EA to connect it online with an OA-ICOS instrument for H2O measurements. The technique is first evaluated for calibrated free water samples. The technique is also evaluated for salt matrix effect, accuracy, and linearity for both isotopic signatures. Then, the technique is used to measure simultaneously delta H-2 and delta O-18 values of halite water inclusions precipitated from the evaporation experiments. Data generated with this new technique appeared to be comparable with those inferred from prior off-line technique studies. The advantages offered by the OA-ICOS technique are the simultaneous acquisition of both isotopic ratios and the substantial reduction of data acquisition time and sample aliquot size. Natural halite samples have been analyzed with this method. Natural halite samples as old as Precambrian have also been analyzed with this method.
机译：已经认识到古留下流体夹杂物的稳定同位素组合物是重建过去环境的有价值的工具。然而，为了更好地了解宿骨沉积物的起源，可以很有趣，将ΔH-2和ΔO-18测量与矿物晶格的缺陷中的夹杂物结合起来。我们开发了一种与改进的元素分析仪（EA-OA-ICOS）连接的轴轴集成腔输出光谱（OA-ICOS）相结合的方法，以执行这些测量。第一步是在实验室中从同位素校准的水域中沉淀的合成乳酸晶体的方法。用常规技术测量水同位素签名，δO-18的平衡和δH-2的铬还原。然后，我们修改并优化了传统的EA以将其与用于H2O测量的OA-ICOS仪器联系。首先评估该技术的校准的游离水样。还评估了同位素签名的盐基质效应，准确性和线性度的技术。然后，该技术用于同时测量从蒸发实验中沉淀出沉淀的半滴水水夹杂物的δH-2和δO-18值。通过这种新技术产生的数据似乎与从现有的离线技术研究推断的那些相当。 OA-ICOS技术提供的优点是同时获取同位素比率和数据采集时间的大幅减少和样品等分试样尺寸。通过这种方法分析了天然的乳酸样品。用这种方法还分析了作为Predambrian的天然宿猪样品。

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  • 来源
    《Journal of mass spectrometry: JMS》 |2020年第10期|共11页
  • 作者

    Fourel Francois; Lecuyer Christophe; Jame Patrick; Guironnet Alexandre; Boutier Antoine; Barbier Manon; Blamey Nigel; Brand Uwe; Fralick Philip;

  • 作者单位

    Univ Claude Bernard Lyon 1 CNRS UMR 5023 Lab Ecol Hydrosyst Nat &

    Anthropises LEHNA 3 Rue Raphael Dubois Bat Forel F-69622 Villeurbanne France;

    Univ Claude Bernard Lyon 1 CNRS UMR 5276 Lab Geol Lyon Terre Planetes Environm Villeurbanne France;

    Univ Claude Bernard Lyon 1 Univ Lyon CNRS Inst Sci Analyt Lyon ISA Lyon 5 Rue Doua F-69100 Villeurbanne France;

    Univ Claude Bernard Lyon 1 Univ Lyon CNRS Inst Sci Analyt Lyon ISA Lyon 5 Rue Doua F-69100 Villeurbanne France;

    Univ Claude Bernard Lyon 1 CNRS UMR 5276 Lab Geol Lyon Terre Planetes Environm Villeurbanne France;

    Univ Claude Bernard Lyon 1 Univ Lyon CNRS Inst Sci Analyt Lyon ISA Lyon 5 Rue Doua F-69100 Villeurbanne France;

    Western Univ Canada Dept Earth Sci 1151 Richmond St N London ON N6A 5B7 Canada;

    Brock Univ Dept Earth Sci St Catharines ON Canada;

    Lakehead Univ Dept Geol Thunder Bay ON Canada;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 分析化学;
  • 关键词

    halite; hydrogen; laser spectroscopy; oxygen; stable isotopes;

    机译：硝酸盐;氢;激光光谱;氧气;稳定同位素;

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