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

    Magma chamber dynamics in a silicic LIP revealed by quartz: The Mesoproterozoic Gawler Range Volcanics

    232190_232190.pdf (2.868Mb)
    Access Status
    Open access
    Authors
    Agangi, Andrea
    McPhie, J.
    Kamenetsky, V.
    Date
    2011
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Agangi, A. and McPhie, J. and Kamenetsky, V. 2011. Magma chamber dynamics in a silicic LIP revealed by quartz: The Mesoproterozoic Gawler Range Volcanics. Lithos. 126 (1-2): pp. 68-83.
    Source Title
    Lithos
    DOI
    10.1016/j.lithos.2011.06.005
    ISSN
    0024-4937
    School
    Department of Applied Geology
    URI
    http://hdl.handle.net/20.500.11937/12736
    Collection
    • Curtin Research Publications
    Abstract

    Silicic-dominated large igneous provinces (SLIP) represent vast amounts of magma (≥ 105 km3) erupted onto the Earth's surface or injected into the crust over short time spans, and are important components of the continental crust. The conditions of formation and evolution of these large magmatic provinces and their magma chambers are still poorly constrained. In this contribution, we examine cathodoluminescence textures and trace element (Al, Ti, Fe) zoning of quartz in a Mesoproterozoic SLIP, the Gawler Range Volcanics (GRV), South Australia. We describe intra-granular textures such as truncation of growth textures and reverse zoning (rimwards increase of Ti content). These characteristics of quartz, together with remelting of already crystallised portions of the magma chamber (felsic enclaves), suggest a complex history of crystallisation and resorption, and fluctuating magma temperature. Titanium-in-quartz geothermometry indicates that adjacent quartz zones record temperature variations (ΔT) up to 70 °C in volcanic units. We also report contrasting (non-correlatable) zoning patterns amongst quartz crystals, each indicating different crystallisation conditions. The juxtaposition of quartz crystals with contrasting zoning patterns is consistent with a dynamic regime (convection, stirring, overturning) of the GRV magma chamber. These results point to pulsating magmatic conditions, compatible with a non-linear evolution of the GRV magma chamber. Heat, necessary to explain both intra-granular and infra-granular textural variations, may have been provided in different pulses by underplating of mafic magma.

    Related items

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

    • Deep to shallow crustal differentiation of within-plate alkaline magmatism at Mt. Bambouto volcano, Cameroon Line
      Marzoli, A.; Aka, F.; Merle, Renaud; Callegaro, S.; N'ni, J. (2015)
      At Mt. Bambouto, a continental stratovolcano of the Cameroon Line, magmatic activity lasted for over 20. Ma and was characterized by at least two caldera formation events. Here we present detailed mineral and whole-rock ...
    • The evolution of mafic and ultramafic rocks of the Mesoproterozoic Fraser Zone, Albany-Fraser Orogen, and implications for the Ni-Cu sulphide potential of the region
      Maier, W.; Smithies, R.; Spaggiari, C.; Barnes, S.; Kirkland, Chris; Kiddie, O.; Roberts, M. (2016)
      The Albany–Fraser Orogen is located along the southern and southeastern margins of the Archean Yilgarn Craton and formed from at least c. 1810 to 1140 Ma during reworking of the craton, accompanied by variable additions ...
    • Late early Cretaceous adakitic granitoids and associated magnesian and potassium-rich mafic enclaves and dikes in the Tunchang–Fengmu area, Hainan Province (South China): Partial melting of lower crust and mantle, and magma hybridization
      Wang, Q.; Li, X.; Jia, X.; Wyman, D.; Tang, G.; Li, Zheng-Xiang; Ma, L.; Yang, Y.; Jiang, Z.; Gou, G. (2012)
      This paper reports on a rare magmatic suite of adakitic rocks and associated magnesian and potassium-rich magmatic enclaves and dikes, which occur in the Tunchang–Fengmu area, Hainan Island (Southeast China). LA-ICP-MS ...
    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.