b'Education matters risk of reactivation, and in\x1buenceelements and their boundaries exhibit the transport of magma. The seismiclinear to curvilinear geometry typical of interpretation used in this studyaccretionary orogens in modern plate permitted a detail characterisationtectonic settings.of 530 normal growth fault segments in terms of displaced sedimentaryGeophysical interpretation and seismic sequences, length, dip angle, strike,re\x1bection constrained forward gravity and changes in displacement along theand magnetic data modelling shed fault plane. This study classi\x1des theselight on the basement architecture of faults segments in the Ceduna Sub- the Tennant Creek Block at the centre basin in three di\x1eerent fault groupsof the North Australian Craton. The related to the displaced sequences andforward modelling reveals predominantly includes three di\x1eerent analyses: (1)WNW-trending faults, de\x1dning a half-Fault kinematic analyses to assess threegraben, \x1dlled by sedimentary rocks of di\x1eerent evolution styles that includethe ca 1840 Ma Ooradidgee Group. The constant growth and reactivation bywest-northwest-trending structural grain either dip-linkage or reactivation duringof the basement is not re\x1bected in the the deposition of upper sequences. (2)overlying younger basins de\x1dned by the Assessment of risk of fault reactivationTomkinson Creek Group, highlighting using the fault analysis seal technologythe limited involvement of basement to demonstrate that areas of the faultstructures in the evolution of the with steep dip angles and obliqueoverlying basin. This relationship is only strikes from the current maximumevident at a local scale. Comparing the horizontal stress are at higher risk ofSEEBASE basin architecture of the North reactivation. (3) Interpretation andAustralian Craton with the identi\x1ded statistical lineal alignment predictionPaleoproterozoic, Mesoproterozoic, andcrustal element boundaries suggests that to demonstrate the substantial controlCambrian sedimentary and volcanicthe basement architecture in\x1buenced the that normal growth faults have on thecover. This thesis focuses on uncoveringgeometry of the overlying basins.geometry and emplacement of eruptivethe hidden basement geology in theOverall, this research enhances centres magma, \x1bow regions andinterior of the North Australian Cratonour understanding of the internal intrusions. and how this basement in\x1buenced thearchitecture of the North Australian overlying basin architecture. UsingCraton and its tectonic evolution, This is the first study in the Cedunapotential \x1deld, seismic re\x1bection, andemphasising the importance of an Sub-basin to include a 3D seismic dataexisting isotopic, geochronological, andintegrated geophysical and geological that extends 12 030 km2 to understandgeochemical data, this study de\x1dnes theapproach in deciphering complex the variation in geometricalbasement crustal structures in the Northbasement architecture and its impact on characteristics and the variability inAustralian Craton. basin development.the fault evolution of normal growth faults, exposing differences in theirA review of U-Pb inherited zircon agesEvgenii Sidenko, Curtin University: evolution styles and the importanceand Neodymium geochemical data forAdvanced downhole geophysical of the detachment in the faultpre-1800 Ma magmatic rocks providedmonitoring of subsurface changes with displacement configuration in deltainsights into the nature of the basement\x1fbre-optic sensors.systems. It established the importanceof the North Australian Craton. Despite of the changes in the fault roughnesslocal variations in magmatism, basin in the prediction of fault reactivationsystems, and deformation between where regions of the faults withthe blocks, they share similar geologic steeper dip angles and oblique strikeevolution, magmatic history, and orientations are at higher risk of faultsedimentary provenance, indicating that reactivation. It also demonstratesthey were part of a contiguous proto-that normal growth faults stronglyNorth Australian Craton prior to the ca influence the transport and1870-1850 Ma Barramundi Orogeny.emplacement of magma by stablishing a preferential northwest-southeastLineament analysis of gravity and alignment between igneous bodiesmagnetic data reveals the composite and the fault strike orientations. nature of the basement in the interior of the North Australian Craton. Five distinct Joel Kumwenda, Monash University:crustal elements are identi\x1ded: Pine Basement architecture of the NorthCreek, Arnhem, North Tennant Creek, Australian Craton. Tennant Creek, and Tanami-Altjawarra. The Pine Creek, Tennant Creek, and The North Australian Craton is aTanami blocks represent the exposed signi\x1dcant component of the Australianparts of the Pine Creek, Tennant Creek, continent, with its basement geologyand Tanami-Altjawarra, separated by older than 1800 Ma. This basementmajor crustal boundaries interpretedDistributed Fibre-Optic Sensing is a geology is mostly concealed beneathas tectonic sutures. These crustalfast-developing technology and is being DECEMBER 2023 PREVIEW 28'