Paleoproterozoic magmatic history of the southern margin of the North Australian Craton: implications for local crustal architecture and evolution of the continental crust

Maria Linda Iaccheri

    Research output: ThesisDoctoral Thesis

    74 Downloads (Pure)

    Abstract

    The age and composition of the unexposed basement of the North Australian Craton are deduced using zircon oxygen and Hafnium isotope compositions combined with whole-rock Neodynium isotope data.
    Spatial variations in isotope compositions subdivide the region into three sectors. This isotopic provinciality implies the coeval partial melting of diverse magma sources and reveals the presence of boundaries in the deep crust. Paleoproterozoic amalgamation of the craton did not involve stacking of exotic terranes, but stabilisation of pre-existing crust by reworking of supracrustal material. This finding indicates that accretionary orogens became an important setting for crustal evolution in the Paleoproterozoic.
    Original languageEnglish
    QualificationDoctor of Philosophy
    Awarding Institution
    • The University of Western Australia
    Supervisors/Advisors
    • Kemp, Tony, Supervisor
    • Bagas, Leon, Supervisor
    • McCuaig, Cam, Supervisor
    Award date30 May 2017
    DOIs
    Publication statusUnpublished - 2017

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