Argon thermochronometers and the effects of recrystallization. Rocks exhumed from high temperatures in continental settings contain a record of cooling in potassium-bearing minerals, known as thermochronometers, due to the quantitative retention of radiogenic argon below some characteristic closure temperature. However, thermochronometers may be affected by recrystallization processes occurring below such temperatures, and in some cases argon data record the timing of crystallization rather tha ....Argon thermochronometers and the effects of recrystallization. Rocks exhumed from high temperatures in continental settings contain a record of cooling in potassium-bearing minerals, known as thermochronometers, due to the quantitative retention of radiogenic argon below some characteristic closure temperature. However, thermochronometers may be affected by recrystallization processes occurring below such temperatures, and in some cases argon data record the timing of crystallization rather than cooling. Field, microstructural and isotopic analysis will be used to evaluate the effects of recrystallization on the muscovite and potassium-feldspar thermochronometers, particularly in fault zones. Understanding the effects of recrystallization on thermochronometers is critical for studies of the assembly of the continental crust.Read moreRead less
Tectonic Reconstruction of the Evolution of the Alpine-Himalayan Orogenic Chain. This project will construct a computationally explicit model of movements in the solid Earth for the past 150 million years, to study the Earth as a complex system during the collision that produced the Alpine-Himalayan mountain belt. This is the youngest collisional mountain belt on Earth, and at times it stretched from Spain to New Zealand. Earth Scientists want to understand the processes that took place to mak ....Tectonic Reconstruction of the Evolution of the Alpine-Himalayan Orogenic Chain. This project will construct a computationally explicit model of movements in the solid Earth for the past 150 million years, to study the Earth as a complex system during the collision that produced the Alpine-Himalayan mountain belt. This is the youngest collisional mountain belt on Earth, and at times it stretched from Spain to New Zealand. Earth Scientists want to understand the processes that took place to make it, in particular the role of ribbon continents. As a result of this work ordinary Australians will be able to better perceive their interactions with their nearest neighbours.Read moreRead less
Understanding the stratigraphic and structural architecture of late Archean basins and the context of their gold deposits. Gold mined from Archean rocks contributed $4.0 billion to Australia's export income in 2006 and provided the backbone of support for many remote communities. However, production has fallen 40% since 1997 and will be exhausted within 15 years unless major new discoveries are made. The potential to find additional gold deposits remains high, but urgently requires new data and ....Understanding the stratigraphic and structural architecture of late Archean basins and the context of their gold deposits. Gold mined from Archean rocks contributed $4.0 billion to Australia's export income in 2006 and provided the backbone of support for many remote communities. However, production has fallen 40% since 1997 and will be exhausted within 15 years unless major new discoveries are made. The potential to find additional gold deposits remains high, but urgently requires new data and improved exploration techniques to assist in their discovery. The results of this integrated multidisciplinary project will help to arrest the declining discovery rate and thereby sustain this important Australian industry.Read moreRead less
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
Constraining landform response to tectonic and climate changes in an active orogen: a multi-disciplinary approach. The aim of this project is to quantify the efficiency of coupling between tectonics, climate and erosion in an active mountain belt, the Southern Alps of New Zealand, by combining world-class expertise in a range of fields, including the collection and analysis of thermochronological data, the analysis of digital elevation maps, morphometric field measurements, and the development a ....Constraining landform response to tectonic and climate changes in an active orogen: a multi-disciplinary approach. The aim of this project is to quantify the efficiency of coupling between tectonics, climate and erosion in an active mountain belt, the Southern Alps of New Zealand, by combining world-class expertise in a range of fields, including the collection and analysis of thermochronological data, the analysis of digital elevation maps, morphometric field measurements, and the development and use of numerical models, both tectonic and geomorphic. In particular, it is proposed to develop and use unique quantitative methods to interpret thermochronological data. This work will help resolve the current debate concerning the potential feedback between climate and tectonics.Read moreRead less
How has the continental lithosphere evolved? Processes of assembly, growth, transformation and destruction. We will use new in-situ analytical techniques, developed In-house, to date the formation and modification of specific volumes of the subcontinental lithospheric mantle, and to define the temporal and genetic relationships between mantle events and crustal formation. Quantitative modelling will investigate the geodynamic consequences of spatial and temporal variations in lithosphere composi ....How has the continental lithosphere evolved? Processes of assembly, growth, transformation and destruction. We will use new in-situ analytical techniques, developed In-house, to date the formation and modification of specific volumes of the subcontinental lithospheric mantle, and to define the temporal and genetic relationships between mantle events and crustal formation. Quantitative modelling will investigate the geodynamic consequences of spatial and temporal variations in lithosphere composition and thermal state. Magmatic products will be used to assess the roles of mantle plumes and delamination in construction of the lithosphere and xenolith studies will investigate the evolution of oceanic plateaus. The results will provide a framework for interpreting the architecture of lithospheric terranes and their boundaries.Read moreRead less
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE0238524
Funder
Australian Research Council
Funding Amount
$1,424,000.00
Summary
The international Ocean Drilling Program - Collaborative Australian Involvement. The Ocean Drilling Program is supported by 21 countries. Australia contributes as a 1/3 member of a consortium with Canada, Chinese Taipei, Korea. The drillship JOIDES Resolution is the unique facility allowing researchers access to the environmental and geological data recorded in the seafloor.
In 2002 the JOIDES Resolution will be drilling sites of international importance in the study of the deep biosphere; deep ....The international Ocean Drilling Program - Collaborative Australian Involvement. The Ocean Drilling Program is supported by 21 countries. Australia contributes as a 1/3 member of a consortium with Canada, Chinese Taipei, Korea. The drillship JOIDES Resolution is the unique facility allowing researchers access to the environmental and geological data recorded in the seafloor.
In 2002 the JOIDES Resolution will be drilling sites of international importance in the study of the deep biosphere; deep sea gas hydrates; oceanic crust generation and evolution (utilising real time geochemical and geophysical experiments in the crust); and past ocean circulation, sea surface temperature and productivity. Fourteen Australian Universities, CSIRO and AGSO support ODP and provide scientists for pre- and post-drilling research and postgraduate training.
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How has continental lithosphere evolved? Processes of assembly, growth, transformation and destruction. Novel in-situ analytical and dating techniques will be used on samples from the Earth's mantle and deep crust to define the processes by which the continents and their roots (to depths of 250 km) have been formed, modified or destroyed at different times throughout Earth's 4.6 billion year evolution. The role of oceanic plateaus and mantle plumes in building protocontinents or modifying lithos ....How has continental lithosphere evolved? Processes of assembly, growth, transformation and destruction. Novel in-situ analytical and dating techniques will be used on samples from the Earth's mantle and deep crust to define the processes by which the continents and their roots (to depths of 250 km) have been formed, modified or destroyed at different times throughout Earth's 4.6 billion year evolution. The role of oceanic plateaus and mantle plumes in building protocontinents or modifying lithospheric volumes will be evaluated. The results will provide a more robust framework for interpreting the architecture of Earth's lithosphere and will have relevance to the formation and location of resources such as Ni, PGEs, Au and diamonds.Read moreRead less
Global Lithosphere Architecture Mapping. Compositional domains in the subcontinental lithospheric mantle reflect the processes of continental assembly and breakup through Earth's history. Their boundaries may focus the fluid movements that produce giant ore deposits. Mapping these boundaries will provide fundamental insights into Earth processes and a basis for the targeting of mineral exploration. We will integrate mantle petrology, tectonic synthesis and geophysical analysis to produce the f ....Global Lithosphere Architecture Mapping. Compositional domains in the subcontinental lithospheric mantle reflect the processes of continental assembly and breakup through Earth's history. Their boundaries may focus the fluid movements that produce giant ore deposits. Mapping these boundaries will provide fundamental insights into Earth processes and a basis for the targeting of mineral exploration. We will integrate mantle petrology, tectonic synthesis and geophysical analysis to produce the first maps of the architecture of the continental lithosphere, to depths of ca 250 km. These maps will provide a unique perspective on global dynamics and continental evolution, and on the relationships between lithosphere domains and large-scale mineralisation.Read moreRead less
The Initiation and 3D Evolution of Instabilities in the Deep Continental Lithosphere. This project is part of a new international initiative in the Geodynamics of the Australian Plate bringing together studies of the active tectonics of the boundary regions of our plate and the ancient analogues of these processes which are locked into the stable interior of the Australian continent. The proposed research is a good fit to the Identification and Extraction of Deep Earth Resources priority goal. D ....The Initiation and 3D Evolution of Instabilities in the Deep Continental Lithosphere. This project is part of a new international initiative in the Geodynamics of the Australian Plate bringing together studies of the active tectonics of the boundary regions of our plate and the ancient analogues of these processes which are locked into the stable interior of the Australian continent. The proposed research is a good fit to the Identification and Extraction of Deep Earth Resources priority goal. Detachment of the lithosphere is associated with fertile mantle being emplaced at shallow depth below the crust; an important precursory event for mineralization. The project builds upon AuScope (NCRIS 5.13) to create infrastructure for a new, smart resource exploration and extraction industry based on modelling and simulation.Read moreRead less