Geochronology of Lower Crustal Cumulate Complexes in the Kohistan Terrane, North-East Pakistan

Jack Edward Stirling

    Research output: ThesisMaster's Thesis

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    Abstract

    The Kohistan Arc Complex (KAC) is a uniquely preserved island arc exposing the world 's most complete cross-section through arc-generated crust. Island arcs are suggested to generate andesitic crust reminiscent of bulk continental crust compositions. However, mechanisms by which the basaltic parent is differentiated towards a composition akin to bulk continental crust is debated. Commonly suggested to occur through crustal underplating and delamination, geochronological data should exhibit a definable age gradient throughout the arc. New ID-TIMS U-Pb ages provide the first radio-isotopic evidence of a younging age gradient in the KAC, providing the first geochronological evidence for crustal underplating and delamination.

    Original languageEnglish
    QualificationMasters
    Awarding Institution
    • The University of Western Australia
    Award date14 Feb 2017
    DOIs
    Publication statusUnpublished - 2016

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