Accessible Requires Authentication Published by De Gruyter April 29, 2020

In-situ measurements of magmatic volatile elements, F, S, and Cl, by electron microprobe, secondary ion mass spectrometry, and heavy ion elastic recoil detection analysis

Estelle F. Rose-Koga ORCID logo, Kenneth T. Koga ORCID logo, Jean-Luc Devidal, Nobumichi Shimizu, Marion Le Voyer, Celia Dalou and Max Döbeli
From the journal American Mineralogist

Abstract

Electron probe and ion probe are the two most used instruments for in situ analysis of halogens in geological materials. The comparison of these two methods on widely distributed glass standards (example: MPI-DING glasses, Jochum et al., G-cubed, 2006) provides a basis for establishing laboratory method, independent geochemical data sets for these elements. We report analyses of F, S, and Cl concentrations in three geological glass samples (EPMA) and 10 referenced standards (EPMA and SIMS). Furthermore, F and Cl absolute abundances have been determined independently for three of the standards (KL2-G, ATHO-G, and KE12), via heavy ion elastic recoil detection analysis (HIERDA), to certify the accuracy of the cross-calibration EPMA-SIMS. The detection limits for EPMA are a 150 μg·g-1 for F, 20 μg·g-1 for S and Cl, and for SIMS < 48 μg·g-1 for F, < 3 μg·g-1 for S, and <19 μg·g-1 for Cl. On SiO2-rich glass-standards, F and Cl measurements by HIERDA highlight a weak matrix effect during SIMS analysis of F and Cl. With the HIERDA independently measured value, we therefore propose an alternative calibration function to empirically correct this matrix effect on the SIMS measurements of F, S, and Cl.


‡ Special collection papers can be found online at http://www.minsocam.org/MSA/AmMin/special-collections.html.


Acknowledgments and funding

E.F.R-K. thanks O. Sigmarsson for the Sletta sample. E.F.R-K. and K.T.K. acknowledge support from Region Auvergne Rhone Alpes (SCUSI program). This is Laboratory of Excellence ClerVolc contribution number 386.

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Received: 2019-07-21
Accepted: 2019-12-21
Published Online: 2020-04-29
Published in Print: 2020-05-26

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