Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item

    Mechanisms of deformation-induced trace element migration in zircon resolved by atom probe and correlative microscopy

    246165_246165.pdf (10.45Mb)
    Access Status
    Open access
    Authors
    Reddy, Steven
    van Riessen, A.
    Saxey, D.
    Johnson, T.
    Rickard, W.
    Fougerouse, D.
    Fischer, S.
    Prosa, T.
    Rice, K.
    Reinhard, D.
    Chen, Y.
    Olson, D.
    Date
    2016
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Reddy, S. and van Riessen, A. and Saxey, D. and Johnson, T. and Rickard, W. and Fougerouse, D. and Fischer, S. et al. 2016. Mechanisms of deformation-induced trace element migration in zircon resolved by atom probe and correlative microscopy. Geochimica Et Cosmochimica Acta. 195: pp. 158-170.
    Source Title
    Geochimica Et Cosmochimica Acta
    DOI
    10.1016/j.gca.2016.09.019
    ISSN
    0016-7037
    School
    Department of Applied Geology
    URI
    http://hdl.handle.net/20.500.11937/42259
    Collection
    • Curtin Research Publications
    Abstract

    The widespread use of zircon in geochemical and geochronological studies of crustal rocks is underpinned by an understanding of the processes that may modify its composition. Deformation during tectonic and impact related strain is known to modify zircon trace element compositions, but the mechanisms by which this occurs remain unresolved. Here we combine electron backscatter diffraction, transmission Kikuchi diffraction and atom probe microscopy to investigate trace element migration associated with a ~20 nm wide, 2° low-angle subgrain boundary formed in zircon during a single, high-strain rate, deformation associated with a bolide impact. The low-angle boundary shows elevated concentrations of both substitutional (Y) and interstitial (Al, Mg and Be) ions. The observed compositional variations reflect a dynamic process associated with the recovery of shock-induced vacancies and dislocations into lower energy low-angle boundaries. Y segregation is linked to the migration and localisation of oxygen vacancies, whilst the interstitial ions migrate in association with dislocations. These data represent the direct nanoscale observation of geologically-instantaneous, trace element migration associated with crystal plasticity of zircon and provide a framework for further understanding mass transfer processes in zircon.

    Related items

    Showing items related by title, author, creator and subject.

    • Nanoscale constraints on the shock-induced transformation of zircon to reidite
      Montalvo, S.; Reddy, Steven; Saxey, David; Rickard, William; Fougerouse, Denis; Quadir, Z.; Johnson, Tim (2019)
      In a hypervelocity impact event, the temperatures and pressures generated by the shock waves far exceed the values produced by endogenic processes. The shock-induced processes can modify the distribution of trace elements ...
    • Enhanced diffusion of Uranium and Thorium linked to crystal plasticity in zircon
      Timms, Nicholas Eric; Kinny, Peter; Reddy, Steven (2006)
      The effects of crystal-plasticity on the U-Th-Pb system in zircon is studied by quantitative microstructural and microchemical analysis of a large zircon grain collected from pyroxenite of the Lewisian Complex, Scotland. ...
    • Quantitative characterization of plastic deformation of zircon and geological implications
      Reddy, Steven; Timms, Nicholas Eric; Pantleon, W.; Trimby, P. (2007)
      The deformation-related microstructure of an Indian Ocean zircon hosted in a gabbro deformed at amphibolite grade has been quantified by electron backscatter diffraction. Orientation mapping reveals progressive variations ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.