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

Katarina Edith Bjorkman

Research output: ThesisDoctoral Thesis

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.
LanguageEnglish
QualificationDoctor of Philosophy
Awarding Institution
  • The University of Western Australia
Thesis sponsors
Award date6 Nov 2017
DOIs
StateUnpublished - 2017

Fingerprint

orthoandesite
transpression
greenstone
petrogenesis
geodynamics
craton
Archean
granite
crust
mantle
tonalite
confluence
granodiorite
rifting
lithosphere
zircon
subduction
compression
melt
sedimentation

Cite this

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title = "40 crust-mantle evolution of the Western Superior Craton: implications for Archaean granite-greenstone petrogenesis and geodynamics",
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.",
keywords = "Archaean geodynamics, zircon, crustal evolution, Superior Province, hafnium isotopes, SHRIMP, Oxygen isotopes, mantle evolution",
author = "Bjorkman, {Katarina Edith}",
year = "2017",
doi = "10.4225/23/5a39c88a2f559",
language = "English",
school = "The University of Western Australia",

}

TY - THES

T1 - 40 crust-mantle evolution of the Western Superior Craton: implications for Archaean granite-greenstone petrogenesis and geodynamics

AU - Bjorkman,Katarina Edith

PY - 2017

Y1 - 2017

N2 - 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.

AB - 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.

KW - Archaean geodynamics

KW - zircon

KW - crustal evolution

KW - Superior Province

KW - hafnium isotopes

KW - SHRIMP

KW - Oxygen isotopes

KW - mantle evolution

U2 - 10.4225/23/5a39c88a2f559

DO - 10.4225/23/5a39c88a2f559

M3 - Doctoral Thesis

ER -