b'Education matters realisations are shown as uncertaintyof the tilted structure with highshortening is localised in narrower within the solution space. Inside theaccuracy, which validate RMs ability forregions. This results in a narrow and inversion processing, RM reduces thecomplex geological structures. thick fold and thrust belt with complex computation cost through reducing theinternal architectures. When isostatic number of forward models running. It isYouseph Ibrahim, University of Sydney:adjustment is facilitated by lithospheric achieved by transforming the objectiveInvestigating the dynamic drivers shaping\x1bexure, fold and thrust belts have function into single components andfold and thrust belts from plate margins togreater relief and are laterally extensive, get optimal estimation via Whittaker- intracontinental settings. with an internal architecture consisting Shannon interpolation. of structural repeats. The \x1dndings are juxtaposed with the Subandean zone, The first model is built up with anillustrating the di\x1eerent structural added anomaly represented by regularpatterns observed in the Bolivian and sinus pattern on a homogeneous fieldPeruvian regions due to their varying to investigate the survey depth andisostatic responses driven by their feasibility of the algorithm. Then adistinct crustal rheology.spatial random field with an anomaly body is generated and tested for theThe second manuscript contrasts the same purpose. The mean fields offormation of fold and thrust belts from RM realisations are able to deliverthe inversion of narrow and wide rifts. good estimates for the velocity.Modern geotherms favour narrow rifts, Both of two models illustrate thewhile warmer Archaean and Proterozoic significance of the accuracy of thegeotherms favour wide rifts. Through spatial characterisation (even thoughnumerical experiments, we explore rifting the accurate ones are not possible inunder di\x1eerent geotherms, followed by real work). So as the further work, wellcompression either immediately post-log data is added as linear constraintsrifting or after a quiescent cooling phase. to estimate the prior informationNarrow rift inversion encourages foreland and drive inversion processing withbasin development adjacent to the seismic observations together. Thefold and thrust belt. Extensional faults virtual well logs are drilled with anreactivate at the centre of the model and equidistance along the survey linenew faults propagate in the adjacent where the seismic survey covers. Theforeland basins. Wide rift inversion, experimental spatial parametrisationshowever, sees broader fault reactivation are estimated from well log velocityThis thesis investigates the dynamicand a widely distributed fold and thrust data samples and fitted into theoreticalprocesses behind the formation andbelt. In wide rifts, when contraction spatial functions to get best-fit usedevolution of fold and thrust belts inimmediately precedes rifting while the for the following inversion. Throughconventional plate margin settingslithosphere is warm, the ductile lower RM, the linear information can beand non-conventional intracontinentalcrust and lithospheric mantle thicken added on the inversion processingsettings. The main research questions are:homogeneously, resulting in a \x1bat in a straightforward way rather than(1) How do pressure gradients derivedMoho. Thrusting is limited to the top few into the objective function as afrom the thickening or thinning of thekilometres of the upper crust. Conversely, regularisation. At the same time, thecrust in\x1buence the genesis and evolutionthe inversion of thermally relaxed wide uncertainty across the realisationsof fold and thrust belts? (2) How doesrifts involves faults that cut across the can be reduced via being constrainedthe rheology of the lithosphere in\x1buencelithosphere and o\x1eset the Moho by 10-by direct observations. The teststhe architecture of an overlying fold30 km, as a result of the embrittlement of with estimated prior information areand thrust belt? (3) How does structuralthe lithosphere. Comparisons are drawn implemented on the same previousand thermal inheritance in\x1buence thewith the Colombian Eastern Cordillera random model for comparison. Thearchitecture of fold and thrust belts?and Centralian Superbasin.results with combination of both(4) How can fold and thrust belts form linear and non-linear constraints within an intracratonic environment? ThisThe \x1dnal manuscript explores the estimated prior information can reachthesis consists of three manuscripts thatcentral Australian Alice Springs to the similar level of results whichaddress these questions. Orogeny, a unique setting in which an are inverted by individual seismicorogeny forms deep within the interior observations with accurate priorThe \x1drst manuscript explores howof a craton. We use a combination information. Even without seismicthe interplay between tectonics andof \x1deldwork, geochronology, and observations, the individual well logisostasy in\x1buences the \x1drst-ordernumerical modelling to explore the data with estimated parametrisationsdevelopment of fold and thrust belts.strange occurrence of a high-grade can still lead to satisfying results whenNumerical experiments highlight thegneiss dome (Entia Dome) adjacent the vertical sampling interval couldcontrasting isostatic response of ato a series of nappes and duplexes cover the spatial correlation length.ductile hot lithosphere (e.g., hinterland(Arltunga Nappe Complex) within the Furthermore, an anisotropy multi- within continental crust) versus a rigideastern Arunta region. Structural data layered model with a tilt is generated tocold lithosphere to the loading ofshow a structural continuity from the test RM for a strong spatial anisotropy.an overlying fold and thrust belt. WeEntia Dome to the Ruby Gap Duplex. The velocity data returns a velocity\x1dnd that when isostatic adjustmentGeochronology at key sites con\x1drms distribution reproducing the geometryis facilitated through ductile \x1bow,the exhumation of the dome to be DECEMBER 2023 PREVIEW 26'