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    Atom probe tomography analysis of the reference zircon gj-1: An interlaboratory study

    Access Status
    Fulltext not available
    Authors
    Exertier, F.
    La Fontaine, A.
    Corcoran, C.
    Piazolo, S.
    Belousova, E.
    Peng, Z.
    Gault, B.
    Saxey, David
    Fougerouse, Denis
    Reddy, Steven
    Pedrazzini, S.
    Bagot, P.
    Moody, M.
    Langelier, B.
    Moser, D.
    Botton, G.
    Vogel, F.
    Thompson, G.
    Blanchard, P.
    Chiaramonti, A.
    Reinhard, D.
    Rice, K.
    Schreiber, D.
    Kruska, K.
    Wang, J.
    Cairney, J.
    Date
    2018
    Type
    Journal Article
    
    Metadata
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    Citation
    Exertier, F. and La Fontaine, A. and Corcoran, C. and Piazolo, S. and Belousova, E. and Peng, Z. and Gault, B. et al. 2018. Atom probe tomography analysis of the reference zircon gj-1: An interlaboratory study. Chemical Geology. 495: pp. 27-35.
    Source Title
    Chemical Geology
    DOI
    10.1016/j.chemgeo.2018.07.031
    ISSN
    0009-2541
    School
    John de Laeter Centre
    URI
    http://hdl.handle.net/20.500.11937/72538
    Collection
    • Curtin Research Publications
    Abstract

    In recent years, atom probe tomography (APT) has been increasingly used to study minerals, and in particular the mineral zircon. Zircon (ZrSiO4) is ideally suited for geochronology by utilising the U-Th-Pb isotope systems, and trace element compositions are also widely used to constrain petrogenetic processes. However, while standard geoanalytical techniques provide information at micrometer scale lengths, the unique combination of chemical/isotopic sensitivity and spatial resolution of APT allows compositional and textural measurements at the nanoscale. This interlaboratory study aims to define the reproducibility of APT data across research facilities and assess the role of different aspects of the atom probe workflow on reproducibility. This is essential to allow correct evaluation of APT results and full utilization of this emerging technique within the geoscience community. In this study, nine samples from the same homogeneous, GJ-1/87 zircon reference grain were sent to nine APT institutes in Germany, the UK, USA, Canada and Australia. After preparing the sample out of a selectioned slab, each institute conducted three different rounds of APT analyses: using (i) unconstrained analysis parameters, (ii) pre-defined analysis parameters, and (iii) interpreting and quantifying a provided dataset. Data such as the measured elemental composition, acquisition parameters, or mass spectrum peak identifications, were recorded and analyzed. We observe a significant variation in the measured composition across this interlaboratory study as well as the number of trace elements identified. These differences are thought to directly result from the user's choice of atom probe data analysis parameters. The type of instrument does not seem to be a critical factor. Consequently, comparison of absolute trace element concentrations on zircon using APT between laboratories is only valid if the same workflow has been ensured.

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