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Resolving Critical Knowledge Gaps Relating to Light and Free-Radical Mediated Transformations of Iron and Copper in Oxic Natural Waters. Understanding the transformation kinetics of iron and copper species is critical to maintaining Australia's water resources since i) iron transformations are key to generation and transport of acid in Australia's coastal environment; ii) growth of toxic algae are stimulated by dissolution of iron-rich sediments with subsequent release of nutrients phosphorus an ....Resolving Critical Knowledge Gaps Relating to Light and Free-Radical Mediated Transformations of Iron and Copper in Oxic Natural Waters. Understanding the transformation kinetics of iron and copper species is critical to maintaining Australia's water resources since i) iron transformations are key to generation and transport of acid in Australia's coastal environment; ii) growth of toxic algae are stimulated by dissolution of iron-rich sediments with subsequent release of nutrients phosphorus and iron, and iii) algal toxicity is related to iron and copper nutrition and interplay of these metals with oxygen. Additionally, global cycles of carbon, phosphorus and nitrogen are influenced by iron and copper interactions with light and oxygen. Improved understanding of these processes should lead to an awareness of how to prevent these problems and, if they occur, approaches to their mitigation.Read moreRead less
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE100100236
Funder
Australian Research Council
Funding Amount
$180,000.00
Summary
Facilities for spectroscopy and diffraction at high pressures. The provision of infrastructure for the study of novel materials under high pressures will enhance Australia's capability in creating new materials and in creating new devices that meet needs in communication, environment and medicine applications. The new facility will enable researchers to understand the response of structures to extreme pressures and will exploit the unique capabilities of the synchrotron light.
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE100100121
Funder
Australian Research Council
Funding Amount
$1,000,000.00
Summary
An analytical transmission electron microscope for the investigation of functional materials, earth processes and novel condensed matter. Sustainablity depends on the delivery of clean energy, pristine water and air, and the manufacture of consumer products with small environmental footprints. Modelling long-term impacts requires an understanding of the hydro-geological cycles. The technologies are well known—efficient electronics, fuel cells, lightweight composites, and so on—but delivery is ....An analytical transmission electron microscope for the investigation of functional materials, earth processes and novel condensed matter. Sustainablity depends on the delivery of clean energy, pristine water and air, and the manufacture of consumer products with small environmental footprints. Modelling long-term impacts requires an understanding of the hydro-geological cycles. The technologies are well known—efficient electronics, fuel cells, lightweight composites, and so on—but delivery is not straightforward. It is clear, however, that novel materials manipulated at fine scales will be key. Transmission electron microscopy (TEM) guides the development of sustainable technologies. The new TEM facility at ANU will accelerate current studies, by enhancing the materials research portfolio, and extending national and international collaborations in materials, geological and earth sciences.Read moreRead less
Carbon and Hydrogen in Melts and Fluids in Planetary Interiors. The Australian community will benefit by the ownership of widely used high impact research in published earth science. This research defines the melting behaviour of silicate-rich materials (terrestrial planets, rocky-moons, meteorites) within the solar system. The research will be required for interpretation of Martian samples and will help to ensure that Australian laboratories participate in 21st Century investigations of the Sol ....Carbon and Hydrogen in Melts and Fluids in Planetary Interiors. The Australian community will benefit by the ownership of widely used high impact research in published earth science. This research defines the melting behaviour of silicate-rich materials (terrestrial planets, rocky-moons, meteorites) within the solar system. The research will be required for interpretation of Martian samples and will help to ensure that Australian laboratories participate in 21st Century investigations of the Solar System by virtue of their leading roles in understanding volcanism and melting behaviour at high pressures and under variable oxidation states. The research will address a national priority in sustainability of earth resources i.e. knowledge underpinning formation of Australian mineral resources.Read moreRead less
The role of melting of oceanic crust within the subduction factory: A melt inclusion approach. Continental crust is ultimately generated in subduction zones, where oceanic crust is recycled back into the mantle along deep ocean trenches, producing island arcs. Processes occurring in the subduction 'factory' are poorly understood, but dehydration of old subducted oceanic crust is usually invoked to provide water that triggers mantle melting and arc magmatism. Evidence is accumulating that in many ....The role of melting of oceanic crust within the subduction factory: A melt inclusion approach. Continental crust is ultimately generated in subduction zones, where oceanic crust is recycled back into the mantle along deep ocean trenches, producing island arcs. Processes occurring in the subduction 'factory' are poorly understood, but dehydration of old subducted oceanic crust is usually invoked to provide water that triggers mantle melting and arc magmatism. Evidence is accumulating that in many locations the subducted oceanic crust may melt, rather than simply dehydrate. I will test this using studies of melt inclusions (droplets of melt trapped by crystals growing in the magma), and will better constrain the input-output budgets of the subduction factory.Read moreRead less
Experimental and natural constraints on trace element and volatile recycling in subduction zones. The results of this project will provide important constraints on the differentiation of Earth, which ultimately leads to the concentration of elements suitable for mining. Trace element and volatile recycling in subduction zones is an integral part of the research theme 'Journey to the centre of the Earth' which has been identified as a key project (4.4) in the national strategic plan for geoscienc ....Experimental and natural constraints on trace element and volatile recycling in subduction zones. The results of this project will provide important constraints on the differentiation of Earth, which ultimately leads to the concentration of elements suitable for mining. Trace element and volatile recycling in subduction zones is an integral part of the research theme 'Journey to the centre of the Earth' which has been identified as a key project (4.4) in the national strategic plan for geosciences. CO2 recycling in subduction zones is crucial for our understanding of the long-term greenhouse gas variations on Earth. The ANU is one of the world-leading research institutions in experimental petrology and geochemistry, and the outcomes of this project will ensure that Australia remains at the forefront in these disciplines.Read moreRead less
Tracking mass transport during metamorphism using in situ micro-analysis of minerals. The continental masses we inhabit developed in response to the colossal forces of plate tectonics. Through compression and heating, rocks of the crust can experience fluid loss or melting. Movement of these fluids or magmas can, among other things, impact on the heat budget of Earth, the carbon and water cycles and the formation of ores in the crust. This project will utilize state-of-the-art scientific instrum ....Tracking mass transport during metamorphism using in situ micro-analysis of minerals. The continental masses we inhabit developed in response to the colossal forces of plate tectonics. Through compression and heating, rocks of the crust can experience fluid loss or melting. Movement of these fluids or magmas can, among other things, impact on the heat budget of Earth, the carbon and water cycles and the formation of ores in the crust. This project will utilize state-of-the-art scientific instruments and methods to greatly improve our understanding of these issues, which, in turn, will enhance our knowledge of how the Earth's crust develops. Research training and development will be provided through two PhD projects supported through this project.Read moreRead less
The geochemistry of trace elements with variable oxidation states. The understanding of many earth processes is based upon an interpretation of differences in the relative abundance and/or distribution of elements which occur in more than one oxidation state. However, the redox states that control the geochemical behaviour of an element in a melt are not necessarily retained on cooling. This work aims to determine the oxidation states of geologically important elements, in situ under magmatic ....The geochemistry of trace elements with variable oxidation states. The understanding of many earth processes is based upon an interpretation of differences in the relative abundance and/or distribution of elements which occur in more than one oxidation state. However, the redox states that control the geochemical behaviour of an element in a melt are not necessarily retained on cooling. This work aims to determine the oxidation states of geologically important elements, in situ under magmatic conditions, using XANES spectroscopy. The results will allow geological signatures to be correctly interpreted and allow models for topics ranging from ancient mantle temperatures to rates of melt migration to be better constrained.Read moreRead less
Groundwater in the southeast Murray Basin: Developing an integrated hydrogeological model and predicting future changes. Agricultural and urban development increases demands on groundwater resources. The sustainable use of groundwater requires a thorough knowledge of hydrogeology. This project addresses the origins, age, and geochemical evolution of groundwater in the Murray Basin, in particular constraining groundwater flow patterns, aquifer-aquitard interaction, water-rock interaction, and gro ....Groundwater in the southeast Murray Basin: Developing an integrated hydrogeological model and predicting future changes. Agricultural and urban development increases demands on groundwater resources. The sustainable use of groundwater requires a thorough knowledge of hydrogeology. This project addresses the origins, age, and geochemical evolution of groundwater in the Murray Basin, in particular constraining groundwater flow patterns, aquifer-aquitard interaction, water-rock interaction, and groundwater-surface water interactions both under present day and previous climatic conditions. The results of this project will ensure that this groundwater resource can be more effectively used and managed sustainably over the long term. In particular, historical responses of the system will be used to predict the effects of landuse or climate changes.Read moreRead less
An experimental exploration of silicate melt therrmodynamics. The chemical properties of magmas are the key to understanding igneous activity in the Earth, and hence the tectonic significance of magmatism, and the mineral resources resulting from past magmatism. The chemistry of magmas is also a determining factor in assessing the hazards associated with volcanic eruptions, including natural inputs into the atmosphere against which anthropogenic inputs causing climate change must be assessed. Th ....An experimental exploration of silicate melt therrmodynamics. The chemical properties of magmas are the key to understanding igneous activity in the Earth, and hence the tectonic significance of magmatism, and the mineral resources resulting from past magmatism. The chemistry of magmas is also a determining factor in assessing the hazards associated with volcanic eruptions, including natural inputs into the atmosphere against which anthropogenic inputs causing climate change must be assessed. This research program will measure experimentally the way different magma compositions affect the solubilites of important volatile and trace-element components in magmas, providing the much-needed fundamental data to model magmatic activity.Read moreRead less