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Potential Orthopyroxene,Clinopyroxene and Olivine Reference Materials for In Situ Lithium Isotope Determination |
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| Authors: | Ben‐Xun Su Xiao‐Yan Gu Etienne Deloule Hong‐Fu Zhang Qiu‐Li Li Xian‐Hua Li Nathalie Vigier Yan‐Jie Tang Guo‐Qiang Tang Yu Liu Kwan‐Nang Pang Aaron Brewer Qian Mao Yu‐Guang Ma |
| Affiliation: | 1. State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China;2. Centre de Recherches Pétrographiques et Géochimiques, UMR 5873 CNRS ‐ Université de Lorraine, Vandoeuvre‐lès‐Nancy Cedex, France;3. Laboratoire d'Océanographie de Villefranche, OOV, CNRS, UPMC, Villefranche sur Mer, France;4. Department of Geosciences, National Taiwan University, Taipei, Taiwan;5. Isotope Laboratory, Department of Earth and Space Sciences, University of Washington, Seattle, WA, USA |
| 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. |
| Keywords: | lithium isotopes mineral reference materials ion probe in situ determination isotopes du lithium miné raux de ré fé rence sonde ionique dé termination in situ |
