Resolving the mystery of how rare earth elements are mobilised and concentrated in continental crust. Rare earth elements are regarded as the vitamins for modern industries and technologies. This project will investigate the geological processes that mobilise and concentrate these elements in the Earth's crust. The results will aid discovery of new ore deposits, which is essential to meet rapidly growing demand for these elements.
Redox conditions in the earth's upper mantle and the implications for kimberlite petrogenesis, diamond formation and mantle metasomatism. Diamonds are an important and high value commodity. Australia is the world's leading producer in terms of carats, due mainly to the massive Argyle deposit in northern Western Australia. Although diamonds form at great depths in the earth, they are accessible at the surface because they are transported by rare volcanic rocks, kimberlites and lamproites. Despite ....Redox conditions in the earth's upper mantle and the implications for kimberlite petrogenesis, diamond formation and mantle metasomatism. Diamonds are an important and high value commodity. Australia is the world's leading producer in terms of carats, due mainly to the massive Argyle deposit in northern Western Australia. Although diamonds form at great depths in the earth, they are accessible at the surface because they are transported by rare volcanic rocks, kimberlites and lamproites. Despite their importance the genesis of these rocks is poorly understood. This research will address this, providing scientific constraints on models for formation of diamonds and their host volcanics, which will directly inform the minerals industry's exploration models. There will be an economic benefit to the nation in terms of more successful outcomes from exploration expenditure.Read moreRead less
The stability and predictability of the Southern Hemisphere coupled ocean-atmosphere climate system. Our ability to adapt to and manage the effects of a changing climate is limited by our understanding of the ocean's response to changes in the atmospheric circulation. This project will establish the basis for the predictability of the climate system and provide state-of-the-art forecasts for climate adaptation.
From plume source to hotspot: quantifying mixing in mantle plumes and its implications for the nature of deep-mantle heterogeneity. Mantle plumes are buoyant upwellings that bring hot material from Earth's deep-mantle to the surface, forming volcanic hotspots, like Hawaii. Although extensively studied, the geochemical variations recorded in hotspot lavas have, so far, proved difficult to understand, particularly how they relate to their heterogeneous deep-mantle source. This project aims to use ....From plume source to hotspot: quantifying mixing in mantle plumes and its implications for the nature of deep-mantle heterogeneity. Mantle plumes are buoyant upwellings that bring hot material from Earth's deep-mantle to the surface, forming volcanic hotspots, like Hawaii. Although extensively studied, the geochemical variations recorded in hotspot lavas have, so far, proved difficult to understand, particularly how they relate to their heterogeneous deep-mantle source. This project aims to use state-of-the-art geodynamical models to determine how deep-mantle heterogeneities are transported into a plume and how such heterogeneities are mixed during plume ascent. This will facilitate the linking, for the first time, of geochemical variations at volcanic hotspots to the deep-mantle's thermo-chemical structure, under an Earth-like, fluid-dynamical framework.Read moreRead less
The origin of the elements heavier than iron. This research investigates the cosmic origin of the elements heavier than iron, as they are produced by nuclear reactions inside stars. The study of these elements in stars and meteorites will help us to understand the origin and history of the Solar System, of old stars and of stellar clusters and galaxies.
Transport barriers in complex turbulent flows: formation, detection and characterization. Barriers to transport in complex fluid flows are ubiquitous in nature, yet mathematical and numerical approaches have so far been unable to solve this problem in the presence of turbulence. This project aims to undertake the first systematic laboratory study of transport barrier generation, control and interactions to reveal the role of turbulence in the stochastic transport in fluids. It will develop new m ....Transport barriers in complex turbulent flows: formation, detection and characterization. Barriers to transport in complex fluid flows are ubiquitous in nature, yet mathematical and numerical approaches have so far been unable to solve this problem in the presence of turbulence. This project aims to undertake the first systematic laboratory study of transport barrier generation, control and interactions to reveal the role of turbulence in the stochastic transport in fluids. It will develop new methods of transport barrier modelling which will equip specialists dealing with Lagrangian transport with new tools for the transport barrier modelling and characterisation.Read moreRead less
Probing gold in hot ore fluids: experiments and molecular dynamics simulations. In order to efficiently discover vital new mineral resources for Australia, explorers must understand the fundamental controls on ore formation. The lack of data for soluble metal behaviour in hot fluids at high pressure is a significant impediment to our understanding of deposit formation and for the application of industrial processes, such as hydrometallurgy. This project will gain molecular-level understanding of ....Probing gold in hot ore fluids: experiments and molecular dynamics simulations. In order to efficiently discover vital new mineral resources for Australia, explorers must understand the fundamental controls on ore formation. The lack of data for soluble metal behaviour in hot fluids at high pressure is a significant impediment to our understanding of deposit formation and for the application of industrial processes, such as hydrometallurgy. This project will gain molecular-level understanding of the fundamental chemistry of gold transport and deposition in high temperature, high-pressure, carbon dioxide-rich fluids and gold colloid systems, using multiple novel experimental techniques and molecular dynamics simulations that make use of Australia’s cutting-edge experimental and computational facilities.Read moreRead less
Lifting the veil on the Geological Dark Ages: The search for Hadean Crust on Earth. The project involves detailed field and isotopic study of some of the oldest known rocks and minerals to develop the first comprehensive picture of the earliest growth of the Australian continent. The data will reveal the timing and processes of continent formation and shed new light on the enigmatic early period of the Earth's evolution.
Global Scale Cycling of Noble Gases and Halogens. A novel approach for combined measurement of halogens and noble gases will be used to provide the first constraints on the concentrations of these elements in key reservoirs within subduction zones. The data will revolutionise our understanding of how noble gases and halogens transfer between the Earth's atmosphere and mantle, which has profound implications for our planet's origin and evolution. In addition, the study will provide practical info ....Global Scale Cycling of Noble Gases and Halogens. A novel approach for combined measurement of halogens and noble gases will be used to provide the first constraints on the concentrations of these elements in key reservoirs within subduction zones. The data will revolutionise our understanding of how noble gases and halogens transfer between the Earth's atmosphere and mantle, which has profound implications for our planet's origin and evolution. In addition, the study will provide practical information about how economically important hydrothermal ore deposits form on the seafloor and it will test models for orogenic gold mineralisation. Read moreRead less
Identifying the secular evolution of chemical heterogeneity in the mantle as probed by deep mantle plumes. This project aims to focus on modes and timescales of melting associated with deep mantle plumes. These melts form massive magmatic bodies and volcanic flood basalt provinces throughout Earth’s history and record the secular chemical evolution of the Earth’s mantle. Selective igneous bodies contain high-grade noble metal deposits and coincide with global mass extinction linked to anoxic oce ....Identifying the secular evolution of chemical heterogeneity in the mantle as probed by deep mantle plumes. This project aims to focus on modes and timescales of melting associated with deep mantle plumes. These melts form massive magmatic bodies and volcanic flood basalt provinces throughout Earth’s history and record the secular chemical evolution of the Earth’s mantle. Selective igneous bodies contain high-grade noble metal deposits and coincide with global mass extinction linked to anoxic ocean events in response to atmospheric volcanic pollution. This project aims to provide knowledge of planetary surface evolution in response to mantle dynamics, place constraints on enrichment processes of metals in ore quality in plume-derived melts, and may help understandings of the relation between massive volcanic eruptions and climate variability.Read moreRead less