Three Spodumene Reference Materials for Oxygen Isotope Measurement by Ion Microprobe

Andreas T. Hertwig; Johannes Chischi; Axel K. Schmitt; Hans C. Oskierski; Kai Rankenburg; Martin Wells; Benita Putlitz; Zakaria Quadir

doi:10.1111/ggr.70003

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Three Spodumene Reference Materials for Oxygen Isotope Measurement by Ion Microprobe

Journal article

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Three Spodumene Reference Materials for Oxygen Isotope Measurement by Ion Microprobe

Andreas T. Hertwig, Johannes Chischi, Axel K. Schmitt, Hans C. Oskierski, Kai Rankenburg, Martin Wells, Benita Putlitz and Zakaria Quadir

Geostandards and geoanalytical research, Vol.49(4), pp.857-869

2025

DOI: https://doi.org/10.1111/ggr.70003

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Abstract

spodumene

SIMS

oxygen isotopes

pegmatites

reference material

This study reports on the development of three spodumene reference materials referred to as Curtin University (CU) Tri-1, Kun-A-1 and MG-1 for calibrating the instrumental mass fractionation for oxygen isotope measurement by secondary ionisation mass spectrometry (SIMS). Millimetre-sized fragments were prepared from gem-quality spodumene crystals with chemical compositions close to the ideal spodumene end member (LiAlSi2O6). From these fragments, six subsamples were extracted for laser fluorination isotope ratio mass spectrometry (LF-IRMS) to determine the bulk oxygen isotope ratio of the three materials and confirm their homogeneity on the mg scale. The bulk δ18O (VSMOW) values are 11.29 ± 0.04‰, 9.12 ± 0.10‰ and 15.13 ± 0.08‰ (all 2SE, standard error of the mean) for materials Tri-1, Kun-A-1 and MG-1, respectively. A random selection of twenty or more fragments from each material was subjected to SIMS analysis. Repeatability of SIMS δ18O measurements was at most 0.24‰ (2s), indicating oxygen isotopic homogeneity on the ng scale. Crystal orientation effects potentially affecting SIMS analysis were systematically evaluated and found to be absent at levels equivalent to the repeatability of the method. Applications of the new materials lie mainly in furthering research on pegmatite formation and tracing of raw materials by providing the means for accurate, in situ oxygen isotope measurement in spodumene.

Details

Title: Three Spodumene Reference Materials for Oxygen Isotope Measurement by Ion Microprobe
Authors/Creators: Andreas T. Hertwig - Curtin University
Johannes Chischi - Murdoch University
Axel K. Schmitt - Curtin University
Hans C. Oskierski - Murdoch University, Centre for Water, Energy and Waste
Kai Rankenburg - Curtin University
Martin Wells - Curtin University
Benita Putlitz - University of Lausanne
Zakaria Quadir - Curtin University
Publication Details: Geostandards and geoanalytical research, Vol.49(4), pp.857-869
Publisher: John Wiley & Sons Ltd on behalf of International Association of Geoanalysts.
Number of pages: 13
Identifiers: 991005788076707891
Murdoch Affiliation: School of Mathematics, Statistics, Chemistry and Physics; Centre for Water, Energy and Waste
Language: English
Resource Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Citation topics: 8 Earth Sciences; 8.8 Geochemistry, Geophysics & Geology; 8.8.1 Geochemical Petrogenesis
Web Of Science research areas: Geochemistry & Geophysics
ESI research areas: Geosciences