Potential Orthopyroxene, Clinopyroxene and Olivine Reference Materials for In Situ Lithium Isotope Determination

Abstract : Over 1400 electron probe and 700 ion probe microanalyses were performed on eleven mineral separates to evaluate their potential as reference materials for in situ Li isotopic determination. Our results suggest the homogenous distributions of major elements, Li and its isotopes for each sample. Hence, these samples are suitable to be used as reference materials for in situ measurements of Li abundance and Li isotopes by secondary ion mass spectrometry (SIMS) or laser ablation‐inductively coupled plasma‐mass spectrometry (LA‐ICP‐MS). These samples have the advantage of mitigating probable matrix effects during calibration owing to the wide range of compositions. The effect of composition on the δ7Li of olivine measured by SIMS is a linear function of composition, with δ7Li increasing by 1.0‰ for each mole per cent decrease in forsterite component.
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Submitted on : Tuesday, April 17, 2018 - 3:34:44 PM
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Ben-Xun Li, Xiao-Yan Gu, Etienne Deloule, Hong-Fu Li, Qiu-Li Li, et al.. Potential Orthopyroxene, Clinopyroxene and Olivine Reference Materials for In Situ Lithium Isotope Determination. Geostandards and Geoanalytical Research, Wiley, 2015, 39 (3), pp.357 - 369. ⟨10.1111/j.1751-908X.2014.00313.x⟩. ⟨hal-01768940⟩

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