Unravelling vanadium biogeochemistry in modern marine sediments. This project aims to unravel the biogeochemistry of vanadium in modern marine sediments for use as a tracer of ancient oxygen concentrations in the oceans of the early Earth. This project will generate fundamental knowledge on the behaviour of vanadium in modern marine sediments by applying advanced analytical tools for imaging its concentration and chemical form at ultra-high resolution. This information is critical for accurate i ....Unravelling vanadium biogeochemistry in modern marine sediments. This project aims to unravel the biogeochemistry of vanadium in modern marine sediments for use as a tracer of ancient oxygen concentrations in the oceans of the early Earth. This project will generate fundamental knowledge on the behaviour of vanadium in modern marine sediments by applying advanced analytical tools for imaging its concentration and chemical form at ultra-high resolution. This information is critical for accurate interpretation of the geological record to infer the oxygen concentration of the oceans at various points in Earth's history. This interdisciplinary project will facilitate strong collaboration between Australian and Danish researchers in the field of marine geochemistry and paleoceanography.Read moreRead less
Deep Atlantic’s role in millennial atmospheric carbon dioxide changes. This project aims to fill in a critical knowledge gap in global carbon cycle research, by generating the first high-resolution deep Atlantic carbonate ion and nutrient records for the last 150,000 years. The project will derive air-sea carbon dioxide (CO2) exchange signals, which permit straightforward evaluation of the deep Atlantic’s role in millennial atmospheric CO2 changes under various climate conditions. The intended o ....Deep Atlantic’s role in millennial atmospheric carbon dioxide changes. This project aims to fill in a critical knowledge gap in global carbon cycle research, by generating the first high-resolution deep Atlantic carbonate ion and nutrient records for the last 150,000 years. The project will derive air-sea carbon dioxide (CO2) exchange signals, which permit straightforward evaluation of the deep Atlantic’s role in millennial atmospheric CO2 changes under various climate conditions. The intended outcome of this project is to substantially improve our understanding of the mechanisms that govern the global carbon cycle. This should provide significant benefits including the assessment of models used to predict future global warming due to anthropogenic CO2.Read moreRead less
Mid-depth Atlantic circulation during the Last Glacial Maximum and deglaciation. The history of ocean circulation at the intermediate water depth remains controversial, limiting our understanding of the interplay of ocean circulation, climate changes, and the global carbon cycle. This project aims to generate trace elemental and isotopic records for 10 key locations in the Atlantic Ocean, which constrain physicochemical properties of water masses at unprecedented temporal resolution during the l ....Mid-depth Atlantic circulation during the Last Glacial Maximum and deglaciation. The history of ocean circulation at the intermediate water depth remains controversial, limiting our understanding of the interplay of ocean circulation, climate changes, and the global carbon cycle. This project aims to generate trace elemental and isotopic records for 10 key locations in the Atlantic Ocean, which constrain physicochemical properties of water masses at unprecedented temporal resolution during the last glacial maximum and the subsequent deglaciation. This multi-proxy approach will reconcile controversy and pin down the evolution of mid-depth Atlantic circulation in the past, and thereby substantially improve our understanding of the climate system.Read moreRead less
How do sediments become magnetised? Construction of an empirical-numerical framework. The magnetism of sediments provides information on the past behaviour of the Earth's magnetic field. This project will study sediments from the oceans around Australia to understand how the field was recorded and use this information to construct a new generation of computer models that will provide insights into the physics of the recording process.
The Australian expression of the Pliocene warm period, an analog for future greenhouse conditions. Records of the planet's response to past climate are important for predicting the future under conditions of global warming. This project will assemble one such record but, in contrast to much existing data, it emphasises the palaeoclimate of southern Australian through a time interval widely regarded as an analog for our climate in the year 2100.
Bioleaching of copper in tropical systems. This project is focussed on bioleaching of chalcopyrite, to recover copper from currently sub-economic low-grade ore. Conventional mining processes are too energy intensive to economically extract copper from low-grade ores. However, these waste ores are still subject to natural, bacterial leaching causing environmental harm. Enhancing this natural process by removing key limitations in bacterial colonisation of metal sulfides aims to enhance bioleachin ....Bioleaching of copper in tropical systems. This project is focussed on bioleaching of chalcopyrite, to recover copper from currently sub-economic low-grade ore. Conventional mining processes are too energy intensive to economically extract copper from low-grade ores. However, these waste ores are still subject to natural, bacterial leaching causing environmental harm. Enhancing this natural process by removing key limitations in bacterial colonisation of metal sulfides aims to enhance bioleaching of low-grade ores creating a win-win scenario, reducing environmental harm while extracting value from these currently uneconomic materials.Read moreRead less
Australian dust: its response to, and role in, climate change. Atmospheric dust plumes can affect global climate, but the impact of Australian dust on climate is poorly known even though it is a major dust source. This project will study the magnetism of dust deposits in marine sediments to understand how Australian dust influences climate in order to better predict the influence of humans on future climate.
Breaking critical barriers in soil formation of bauxite residues . Conventional methods of bauxite residue rehabilitation require expensive and unsustainable covering topsoil. Building on recent breakthroughs in eco-engineering tailings into soil, the project aims to develop a field-based technology using marine microbes and halophytic plants to accelerate in-situ soil formation from bauxite residues (incl seawater neutralised bauxite residues) under field conditions. The technology will be unde ....Breaking critical barriers in soil formation of bauxite residues . Conventional methods of bauxite residue rehabilitation require expensive and unsustainable covering topsoil. Building on recent breakthroughs in eco-engineering tailings into soil, the project aims to develop a field-based technology using marine microbes and halophytic plants to accelerate in-situ soil formation from bauxite residues (incl seawater neutralised bauxite residues) under field conditions. The technology will be underpinned by understanding the roles of marine microbe consortia and eco-engineering inputs in accelerating key mineralogical, geochemical, physical and biological changes in bauxite residues. This technology is expected to be transferable and adaptable across other alumina refineries in Australia.Read moreRead less
Eco-engineering soil from mine tailings for native plant rehabilitation. Eco-engineering soil from mine tailings for native plant rehabilitation. This project aims to develop integrated and low-cost eco-engineering technology to purposefully accelerate in-situ formation of soil from tailings for sustainable native plant community rehabilitation at metal mines. Soil shortages at mines cost the Australian mining industry billions of dollars in sustainable rehabilitation of tailings, and threaten t ....Eco-engineering soil from mine tailings for native plant rehabilitation. Eco-engineering soil from mine tailings for native plant rehabilitation. This project aims to develop integrated and low-cost eco-engineering technology to purposefully accelerate in-situ formation of soil from tailings for sustainable native plant community rehabilitation at metal mines. Soil shortages at mines cost the Australian mining industry billions of dollars in sustainable rehabilitation of tailings, and threaten the industry’s ecological and commercial sustainability. Building on recent findings of critical processes in soil formation from copper/lead–zinc tailings, this research will use key biogeochemical and rhizosphere processes in the tailing-soil to create a functional 'technosol'. This technology is intended to be used in Australian metal mines to offset the soil needed to rehabilitate tailings landforms with native plant communities.Read moreRead less
Gaining insights into mine waste dumps to avoid environmental legacies. The project aims to develop new methods for identifying pollution source hotspots and pathways inside mine waste rock dumps. This addresses the national need for effective management of Acid and Metalliferous Drainage (AMD), which is now a critical consideration in the viability of new mines and in confronting pollution legacies of old mines. The research will develop and test innovative methods of geophysical and geochemica ....Gaining insights into mine waste dumps to avoid environmental legacies. The project aims to develop new methods for identifying pollution source hotspots and pathways inside mine waste rock dumps. This addresses the national need for effective management of Acid and Metalliferous Drainage (AMD), which is now a critical consideration in the viability of new mines and in confronting pollution legacies of old mines. The research will develop and test innovative methods of geophysical and geochemical analysis and their integration that provide 3-dimensional mapping of key physical and chemical features of the dump. Expected outcomes include greater confidence in the ability of the mining industry to manage its AMD liability. Read moreRead less