Geochemistry of ore metals at very high temperatures. The world’s largest copper and gold mines occur in extinct volcanoes around the Pacific Rim. Understanding how these essential metals are mobilised from magmas in the roots of volcanoes to become ore deposits and how to recognize where this has occurred is crucial in exploration for new deposits.
Ore deposits and tectonic evolution of the Lachlan Orogen, SE Australia. Ore deposits and tectonic evolution of the Lachlan Orogen, SE Australia. This project aims to develop and test models to evaluate past tectonic processes and configurations in South-east Australia, using both new and existing geological, geophysical and isotopic data. Over the past 550 million years, plate tectonic processes have formed metal-rich mineral deposits in South-east Australia. The project will identify areas of ....Ore deposits and tectonic evolution of the Lachlan Orogen, SE Australia. Ore deposits and tectonic evolution of the Lachlan Orogen, SE Australia. This project aims to develop and test models to evaluate past tectonic processes and configurations in South-east Australia, using both new and existing geological, geophysical and isotopic data. Over the past 550 million years, plate tectonic processes have formed metal-rich mineral deposits in South-east Australia. The project will identify areas of high potential for economically valuable ore deposits, enabling more efficient prioritisation of mineral exploration efforts. This is expected to increase the probability of significant ore deposit discoveries leading to national economic benefit.Read moreRead less
Hydrothermal remobilisation of base metals and platinum group elements in magmatic nickel deposits. Magmatic nickel sulphide deposits are highly valuable but extremely challenging exploration targets, thought to lack the distinctive geochemical haloes that allow small targets to be identified from sparse drilling. The project will test the potential of hydrothermal remobilisation of nickel, cobalt and platinum group elements to create broad alteration haloes.
Gold transport in aqueous versus organic fluids: Experimental data for describing ore-forming systems. In many hydrothermal ore-forming systems, the ore is associated with inclusions of both aqueous brine and organic liquid (petroleum). The conventional theory is that the metals are dissolved and transported to the deposit by the brine, but some researchers suggest that petroleum may fill this role. This project proposes to conduct an experimental and field-based study on the chemical behaviour ....Gold transport in aqueous versus organic fluids: Experimental data for describing ore-forming systems. In many hydrothermal ore-forming systems, the ore is associated with inclusions of both aqueous brine and organic liquid (petroleum). The conventional theory is that the metals are dissolved and transported to the deposit by the brine, but some researchers suggest that petroleum may fill this role. This project proposes to conduct an experimental and field-based study on the chemical behaviour of gold in aqueous-organic and organic fluid systems, to determine which type of liquid is more important for gold mobilisation in a competitive situation. This study will provide much-needed data for more accurate modelling of ore systems, furthering our understanding and facilitating mineral exploration. Read moreRead less
Magnetite and metal-rich sulphides in arc magmas. Ascending magmas cool and crystallise a variety of minerals. Triggering sulfide deposition which hosts base and precious metals is a critical point in magma evolution. This research will explore the role of magnetite as this trigger and its potential as a tracer of this process.
Diamonds - a window into the ancient mantle: the origin of Earth's atmosphere and outgassing of the mantle. The project will provide a better understanding of the mantle source regions of diamonds and, in particular, homogeneity/heterogeneity of the source regions as a function of space and time - potentially of economic significance for diamond exploration. The project will investigate the noble gas compositions of a systematic selection of diamonds of different ages and from different parts of ....Diamonds - a window into the ancient mantle: the origin of Earth's atmosphere and outgassing of the mantle. The project will provide a better understanding of the mantle source regions of diamonds and, in particular, homogeneity/heterogeneity of the source regions as a function of space and time - potentially of economic significance for diamond exploration. The project will investigate the noble gas compositions of a systematic selection of diamonds of different ages and from different parts of the mantle. Together with carbon and nitrogen isotope systematics, this information will be used to better constrain models of Earth outgassing and the evolution of the Earth's atmosphere and mantle.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
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE0775533
Funder
Australian Research Council
Funding Amount
$700,000.00
Summary
A New Generation Noble Gas Mass Spectrometer Facility for Advanced Research in the Earth, Planetary and Environmental Sciences. The current proposal, to establish a new Noble Gas Analytical Consortium for noble gas chronological and geochemical analyses, will generate new knowledge on the evolution of the Earth, with profound implications for past climate change, landscape evolution, formation of ore bodies, and terrestrial geodynamics. Consequently, the facility will conform to the National Res ....A New Generation Noble Gas Mass Spectrometer Facility for Advanced Research in the Earth, Planetary and Environmental Sciences. The current proposal, to establish a new Noble Gas Analytical Consortium for noble gas chronological and geochemical analyses, will generate new knowledge on the evolution of the Earth, with profound implications for past climate change, landscape evolution, formation of ore bodies, and terrestrial geodynamics. Consequently, the facility will conform to the National Research Priority of 'An Environmentally Sustainable Australia'. The new facility will ensure that Australian research remains at the forefront of international science development and will also provide essential training for the next generation of Australian scientists.Read moreRead less
The copper-gold fertility of mountain belts. This project aims to identify the timing of, and understand the causes of, sulphide saturation in granitic suites to test the hypothesis that sulphide saturation controls the fertility of copper-gold deposits. More than half of the world’s copper and gold comes from granitic rocks, but most granitic suites are barren. As copper-gold deposits become increasingly difficult to find, and exploration budgets have been slashed, it is critical to reliably di ....The copper-gold fertility of mountain belts. This project aims to identify the timing of, and understand the causes of, sulphide saturation in granitic suites to test the hypothesis that sulphide saturation controls the fertility of copper-gold deposits. More than half of the world’s copper and gold comes from granitic rocks, but most granitic suites are barren. As copper-gold deposits become increasingly difficult to find, and exploration budgets have been slashed, it is critical to reliably distinguish ore bearing from barren systems. Platinum group element geochemistry could make this distinction by pinpointing the timing of sulphide saturation in evolving magma systems. Eliminating barren suites as exploration targets will save Australia’s exploration dollars which can be directed to where the prospects of success are greatest.Read moreRead less
Geological applications of synchrotron radiation: magmas, fluids, ores and minerals. This project will use the Australian synchrotron facility to study magmas and minerals to improve our understanding of the formation of ore-deposits and the evolution of the continents.