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Rhyolitic and basaltic reference materials for TC/EA analysis: Investigation of water extraction and D/H ratios
Chemical Geology ( IF 3.9 ) Pub Date : 2021-08-17 , DOI: 10.1016/j.chemgeo.2021.120486
I.N. Bindeman 1 , M.R. Hudak 1 , J.P. Palandri 1 , H. Qi 2 , R. Milovsky 3 , R.L. Hervig 4 , M.R. Perfit 5
Affiliation  

There is an increase use of silicic and basaltic glasses for investigation of magmatic degassing and secondary hydration using water and D/H ratios, as well as for study these parameters in the mantle and crustal magmas. The advent of the High Temperature Conversion Element Analyzer (TC/EA) continuous flow mass spectrometry made determination of hydrogen isotopes relatively quick and precise (±0.04 wt% H2O and 1–3‰ δ2H). Many labs around the world have such systems, thus there is a need to develop both silicic and mafic volcanic glass reference materials (RMs) that can be used for interlaboratory comparison by bulk and microanalytical methods. Here, we report results of such investigation run against solid RMs (USGS micas) and water RMs (including VSMOW) in three different labs and describe analytical protocols. We report on the effects of glass size fraction, the mass of aliquots measure, and yield dependency for two glasses: UOR (drill cutting of IDDP-1 rhyolite, Iceland) and UOB (an E-MORB basalt from the East Pacific Rise). Proposed RM values are:

UOB rhyolitic glass (n = 31):H2O=1.84±0.06wt%1s.d.,andδ2H=115.5±2.61s.d..

UOB basaltic glass (n = 60):H2O=0.37±0.03wt%1s.d.,andδ2H=82.1±5.71s.d..

Samples are available in 50 mg quantities from the Stable Isotope Laboratory at the University of Oregon for a nominal fee.



中文翻译:

用于 TC/EA 分析的流纹岩和玄武岩参考材料:水提取和 D/H 比的研究

越来越多地使用硅质和玄武质玻璃来研究岩浆脱气和使用水和 D/H 比进行二次水合,以及研究地幔和地壳岩浆中的这些参数。高温转化元素分析仪 (TC/EA) 连续流动质谱仪的出现使得氢同位素的测定相对快速和精确(±0.04 wt% H 2 O 和 1–3‰ δ 2H)。世界各地的许多实验室都有这样的系统,因此需要开发可用于通过本体和微量分析方法进行实验室间比较的硅质和镁铁质火山玻璃参考材料 (RM)。在这里,我们报告了在三个不同实验室中针对固体 RM(USGS 云母)和水 RM(包括 VSMOW)进行的此类调查的结果,并描述了分析方案。我们报告了两种玻璃的玻璃尺寸分数、等分试样质量和产量依赖性的影响:UOR(冰岛 IDDP-1 流纹岩的钻孔切割)和 UOB(来自东太平洋隆起的E- MORB 玄武岩)。建议的 RM 值为:

大华流纹玻璃(n  = 31):H2=1.84±0.06重量%1.d.,δ2H=-115.5±2.61.d..

大华玄武玻璃(n  = 60):H2=0.37±0.03重量%1.d.,δ2H=-82.1±5.71.d..

俄勒冈大学稳定同位素实验室可提供 50 mg 样品,收取象征性费用。

更新日期:2021-08-17
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