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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

Authors
  • Rose-Koga, Estelle F.1
  • Koga, Kenneth T.1
  • Devidal, Jean-Luc1
  • Shimizu, Nobumichi2
  • Voyer, Marion Le3
  • Dalou, Celia4
  • Döbeli, Max5
  • 1 Université Clermont Auvergne, CNRS UMR6524, IRD, OPGC, Laboratoire Magmas et Volcans, F-63000 , (France)
  • 2 Department of Geology and Geophysics, Woods Hole Oceanographic Institution, 02543 , (United States)
  • 3 Smithsonian Institution, National Museum of Natural History, PO Box 37012, MRC 119 , (United States)
  • 4 Centre de Recherches Pétrographiques et Géochimiques, UMR7358, CNRS—Université de Lorraine, BP20, 54501 , (France)
  • 5 Laboratory for Ion Beam Physics, ETH Zürich, 8093 , (Switzerland)
Type
Published Article
Journal
American Mineralogist
Publisher
Mineralogical Society of America
Publication Date
Apr 29, 2020
Volume
105
Issue
5
Pages
616–626
Identifiers
DOI: 10.2138/am-2020-7221
Source
De Gruyter
Keywords
License
Yellow

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.

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