40 crust-mantle evolution of the Western Superior Craton: implications for Archaean granite-greenstone petrogenesis and geodynamics

Katarina Edith Bjorkman

Research output: ThesisDoctoral Thesis

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Abstract

New U-Pb, Lu-Hf and O isotopic measurements on Igneous-hosted zircons help unravel the crust-mantle evolution of the Superior Craton, Canada. Uniform isotope time arrays spaning 600 m.y., together with the physiochemical rock record, are reconciled by in-situ Paleoarchaean rifting, Neoarchaean basin closure by subduction and structural repetition during late transpression. The appearance of the sanukitoid suite during transpression reflects the confluence of stiff, thick lithosphere, compression, widespread sedimentation, transport of sedimentary materials to mantle depth and extensive differentiation of derived melts. Therefore, the global late Archaean tonalite-trondjemite-granodiorite to sanukitoid transition marks the establishment of uniformitarian crust formation processes on Earth.
Original languageEnglish
QualificationDoctor of Philosophy
Awarding Institution
  • The University of Western Australia
Thesis sponsors
Award date6 Nov 2017
DOIs
Publication statusUnpublished - 2017

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