Integrated dynamic models of subduction initiation, slab evolution, arc - back-arc deformation and mantle convection. A major debate in plate tectonics concerns the driving mechanism for formation of extensional back-arc basins in the overriding plate along a convergent tectonic boundary, where a subducting plate is thrust into the mantle underneath an overriding plate. One hypothesis states that such extension results from sinking and rollback of the subducting plate. The physical validity of t ....Integrated dynamic models of subduction initiation, slab evolution, arc - back-arc deformation and mantle convection. A major debate in plate tectonics concerns the driving mechanism for formation of extensional back-arc basins in the overriding plate along a convergent tectonic boundary, where a subducting plate is thrust into the mantle underneath an overriding plate. One hypothesis states that such extension results from sinking and rollback of the subducting plate. The physical validity of this hypothesis will be tested using both laboratory and numerical modelling techniques. The modelling will investigate overriding plate - subducting plate - mantle interaction in three-dimensional space and quantify the role of key physical parameters on the subduction process.Read moreRead less
Integrating Stress and Strain Data from the North West Shelf, Australia: Implications for Hydrocarbon Seal Integrity. Many exploration wells in the Australian North West Shelf encounter residual columns from which hydrocarbons have leaked due to fault reactivation. Recently there has been a significant increase in our knowledge of contemporary stress (from data such as borehole breakouts)
and strain (from fault reactivation styles) on the North West Shelf.
This project will integrate informati ....Integrating Stress and Strain Data from the North West Shelf, Australia: Implications for Hydrocarbon Seal Integrity. Many exploration wells in the Australian North West Shelf encounter residual columns from which hydrocarbons have leaked due to fault reactivation. Recently there has been a significant increase in our knowledge of contemporary stress (from data such as borehole breakouts)
and strain (from fault reactivation styles) on the North West Shelf.
This project will integrate information on stress and strain in order to investigate whether the current state-of-stress is consistent with
observed reactivation styles, and thus develop predictive models for
fault reactivation and hydrocarbon leakage based on the distribution of
stress and strain.Read moreRead less
The neo- and seismo-tectonics of northwestern Australia. Australia's two largest earthquakes occurred in NW Australia (magnitudes 7 and 7.9 in 1941 and 1906). Onshore and offshore geologic evidence indicates other such events in recent geological history. Our present seismic database records no such events. We propose to document the nature, frequency, intensity, distribution and possible causes of seismicity in NW Australia, through deployment of seismograph arrays. We will test the effects ....The neo- and seismo-tectonics of northwestern Australia. Australia's two largest earthquakes occurred in NW Australia (magnitudes 7 and 7.9 in 1941 and 1906). Onshore and offshore geologic evidence indicates other such events in recent geological history. Our present seismic database records no such events. We propose to document the nature, frequency, intensity, distribution and possible causes of seismicity in NW Australia, through deployment of seismograph arrays. We will test the effects of basement reactivation, determine the crustal structure beneath the cratonic mass, examine onshore and offshore faults, determine local and regional stress orientations and investigate implications for petroleum production in the region, and whether natural resource extraction causes local seismicity.Read moreRead less
Detachments in evaporites and shales: their controls on fold-thrust belt style and wedge geometry. Deepwater fold-thrust belts comprise large structural traps, currently a major focus of Australian petroleum exploration. The structural style of a fold-thrust belt is controlled by its detachment and new field analogues will demonstrate the fundamental role of detachments.
Exploring deep Australia: 3-D imaging of the lithosphere beneath south-east Australia using multiple high density seismic arrays. The successful completion of this project will significantly improve our knowledge of the seismic structure of the Australian lithosphere, and hence improve our understanding of how the Australian continent came to be formed. In addition, the tomographic imaging methods that will be developed and applied to the individual and combined seismic arrays have a direct rele ....Exploring deep Australia: 3-D imaging of the lithosphere beneath south-east Australia using multiple high density seismic arrays. The successful completion of this project will significantly improve our knowledge of the seismic structure of the Australian lithosphere, and hence improve our understanding of how the Australian continent came to be formed. In addition, the tomographic imaging methods that will be developed and applied to the individual and combined seismic arrays have a direct relevance to the seismic imaging techniques used by the exploration industry. Finally, the creation of a combined dataset comprising records from ~300 stations will help keep Australia at the leading edge of observational seismology, as other countries (e.g. U.S.) begin to deploy very large seismic arrays.Read moreRead less
Compressional Deformation and Uplift of Australia's Passive Southern Margin. The key project benefit will be to advance our understanding of the processes which cause active deformation of continental margins that are predicted by plate tectonic theory to be passive. We will analyse Australia's 'passive' southern margin because it is an ideal natural laboratory in which to investigate the causes of the deformation of 'passive' continental margins. Hydrocarbon exploration interest and investment ....Compressional Deformation and Uplift of Australia's Passive Southern Margin. The key project benefit will be to advance our understanding of the processes which cause active deformation of continental margins that are predicted by plate tectonic theory to be passive. We will analyse Australia's 'passive' southern margin because it is an ideal natural laboratory in which to investigate the causes of the deformation of 'passive' continental margins. Hydrocarbon exploration interest and investment has waned along much of Australia's southern margin because of lack of understanding of the relative age of the formation of potentially hydrocarbon-bearing structures and the timing of hydrocarbon charge. This project will clarify their relative ages.Read moreRead less
Obduction, lithospheric flexure and basin formation. The proposal aims to investigate the links between hydrocarbon basins and obduction, or emplacement of oceanic crust onto continental margins. Obduction of the Samail Ophiolite of Oman onto the Arabian Peninsular at a time of the world's largest hydrocarbon accumulation, requires a causative relationship. This event remains poorly constrained and controversial, and therefore limits exploration models for hydrocarbons. Understanding the dynamic ....Obduction, lithospheric flexure and basin formation. The proposal aims to investigate the links between hydrocarbon basins and obduction, or emplacement of oceanic crust onto continental margins. Obduction of the Samail Ophiolite of Oman onto the Arabian Peninsular at a time of the world's largest hydrocarbon accumulation, requires a causative relationship. This event remains poorly constrained and controversial, and therefore limits exploration models for hydrocarbons. Understanding the dynamics of obduction of ocean crust onto a passive continental margin and the resultant flexural basin is of major global importance. This proposal addresses this issue in the superbly exposed Arabian Pensinsular, applying geochronology, basin analysis and basin modelling techniques.Read moreRead less
Subsurface fluid flow through fractures in sedimentary basins. This project aims to improve understanding of subsurface fluid transport through fractures. Fractures in rock provide interconnected, hydraulically conductive networks enabling large-volume fluid transport through sedimentary basins. The ability of a fracture to transmit fluid is primarily controlled by the in situ stress field, but also by rock strength, fracture plane orientation and roughness and pore-fluid pressure. We have a goo ....Subsurface fluid flow through fractures in sedimentary basins. This project aims to improve understanding of subsurface fluid transport through fractures. Fractures in rock provide interconnected, hydraulically conductive networks enabling large-volume fluid transport through sedimentary basins. The ability of a fracture to transmit fluid is primarily controlled by the in situ stress field, but also by rock strength, fracture plane orientation and roughness and pore-fluid pressure. We have a good understanding of in situ stress within many sedimentary basins, but know very little about the nature and origin of natural fractures. This project aims to provide a detailed, quantitative understanding of the nature and origin of natural fractures in the subsurface, which is critical for predicting fluid migration within aquifers, carbon dioxide storage sites, and geothermal and hydrocarbon reservoirs.Read moreRead less
Confined comminution and particle flow: a general model for large-scale canonical solutions. The project integrates recent advances in continuum mechanics to develop a novel theory of comminution for large-scale problems of grain-size reduction, beyond the reach of particle-based simulations. We will deliver new knowledge and predictive tools by solving fundamental and significant comminution problems. Underpinning this development will be a direct link between energy and particle kinematics. Th ....Confined comminution and particle flow: a general model for large-scale canonical solutions. The project integrates recent advances in continuum mechanics to develop a novel theory of comminution for large-scale problems of grain-size reduction, beyond the reach of particle-based simulations. We will deliver new knowledge and predictive tools by solving fundamental and significant comminution problems. Underpinning this development will be a direct link between energy and particle kinematics. This unique methodology will enable the prediction of energy flow in fault zones, and energy losses from machine to particle and between particles.Read moreRead less
Flow characteristics of lower crustal rocks: developing a toolbox to improve geodynamic models. This project will investigate in detail how rocks flow in the lowest part of the Earth's crust. The results will be used to improve sophisticated computer simulations of large-scale geological processes, allowing a better understanding of earthquakes, the formation of volcanic areas and location of energy resources.