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

    Phase equilibrium constraints on conditions of granulite facies metamorphism at Scourie, NW Scotland

    Access Status
    Fulltext not available
    Authors
    Johnson, Tim
    White, R.
    Date
    2011
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Johnson, T. and White, R. 2011. Phase equilibrium constraints on conditions of granulite facies metamorphism at Scourie, NW Scotland. Journal of the Geological Society. 168: pp. 147-158.
    Source Title
    Journal of the Geological Society
    ISSN
    00167649
    URI
    http://hdl.handle.net/20.500.11937/42020
    Collection
    • Curtin Research Publications
    Abstract

    The metamorphic evolution of a metapyroxenite and metagabbro from Scourie, NW Scotland, is investigated using phase equilibria modelled in the NCFMASHTO (Na2O–CaO–FeO–MgO–Al2O3–SiO2–H2O–TiO2–O) system. The calculated stability fields for the observed assemblages in each rock overlap and imply conditions of 8.5–11.5 kbar and 875–975 °C for the peak of granulite-facies (Badcallian) metamorphism. The lack of any evidence for the former presence of garnet in the metapyroxenite suggests that the rocks cannot have reached pressures much in excess of those recorded at the metamorphic peak. The growth of coronas of plagioclase, orthopyroxene and magnetite replacing garnet in the metagabbro is consistent with near-isothermal retrograde decompression from the metamorphic peak to pressures of 7–9 kbar. The constraints on the pressure–temperature evolution imposed by the modelled phase equilibria are more consistent with a process of crustal growth dominated by magmatic accretion rather than by significant tectonic thickening during the early Scourian.

    Related items

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

    • Zircon as a metamorphic timekeeper: A case study from the Caledonides of central Norway
      Kirkland, Chris; Slagstad, T.; Johnson, Tim (2018)
      © 2018 International Association for Gondwana Research. During metamorphism, inherited or detrital zircon grains commonly serve as a template onto which new generations of metamorphic zircon precipitates, charting successive ...
    • Mineral-scale trace element and U-Th-Pb age constraints on metamorphism and melting during the Petermann Orogeny (Central Australia)
      Gregory, Courtney; Buick, I.; Hermann, J.; Rubatto, D. (2009)
      High-pressure amphibolite-facies migmatitic orthogneisses from the Cockburn Shear Zone (CSZ), northern Musgrave Block in central Australia, were formed during the 580-520 Ma intraplate Petermann Orogeny. The shear-zone ...
    • Phase equilibrium constraints on a deep crustal metamorphic field gradient: metapelitic rocks from the Ivrea Zone (NW Italy)
      Redler, C.; Johnson, Tim; White, R.; Kunz, B. (2012)
      The metamorphic rocks of the Ivrea Zone in NW Italy preserve a deep crustal metamorphic field gradient. Application of quantitative phase equilibria methods to metapelitic rocks provides new constraints on the P–T conditions ...
    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.