Rhyolitic and basaltic reference materials for TC/EA analysis: Investigation of water extraction and D/H ratios
Rhyolitic and basaltic reference materials for TC/EA analysis: Investigation of water extraction and D/H ratios
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DOI：
10.1016/j.chemgeo.2021.120486
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发表时间：
2021-08-19
期刊：
影响因子：
3.9
通讯作者：
Perfit, M. R.
中科院分区：
文献类型：
--
作者：
Bindeman, I. N.;Hudak, M. R.;Perfit, M. R.
硅质和玄武岩玻璃的水和 D/H 比率越来越多地用于研究岩浆脱气和二次水化，以及研究地幔和地壳岩浆中的这些参数。高温转换元素分析仪 (TC/EA) 连续 (f) 低质谱法的出现使得氢同位素的测定相对快速和精确（+/- 0.04 wt% H4(2)O 和千分之 1-3 (delta H-2)。世界各地的许多实验室都拥有此类系统，因此需要开发可用于实验室间比较的硅质和玄武质火山玻璃标准物质 (RM)在此，我们报告了在三个不同实验室中对固体 RM（USGS 云母）和水 RM（包括 VSMOW）进行的调查结果，并描述了玻璃尺寸分数、测量的等份质量以及两种玻璃的产量依赖性：UOR（冰岛 IDDP-1 流纹岩的钻切）和 UOB（来自东太平洋海隆的 E-MORB 玄武岩）的影响。分别是：UOB 流纹岩玻璃 (n = 31)：H2O = 1.84 4 +/- 0.06 wt%(1 s.d.)，以及 delta H-2 = -115.5 +/- 2.6 千分之几(1 s.d.)UOB 玄武岩玻璃 (n = 60)：H2O = 0.37 4 +/- 0.03 wt%(1 s.d.)，δ H-2 = - 82.1 +/- 5.7 千分之一 (1 s.d.) 玻璃参考材料可从俄勒冈大学稳定同位素实验室购买，数量为 100 mg，象征性收费。
Increasingly, water and D/H ratios of silicic and basaltic glasses are used to investigate magmatic degassing and secondary hydration, 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 (f)low mass spectrometry made the determination of hydrogen isotopes relatively quick and precise (+/- 0.04 wt% H4(2)O and 1-3 parts per thousand (delta H-2). Many labs around the world have such systems, thus there is a need to develop both silicic and basaltic 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 measured, 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 4 +/- 0.06 wt%(1 s.d.), and delta H-2 = -115.5 +/- 2.6 parts per thousand(1 s.d.)UOB basaltic glass (n = 60):H2O = 0.37 4 +/- 0.03 wt%(1 s.d.), and delta H-2 = - 82.1 +/- 5.7 parts per thousand(1 s.d.)Glass reference materials are available in 100 mg quantities from the Stable Isotope Laboratory at the University of Oregon for a nominal fee.