Discovery Early Career Researcher Award - Grant ID: DE170100417
Funder
Australian Research Council
Funding Amount
$358,508.00
Summary
Unlocking critical metals from Australian sediments and ores. This project aims to explore the recrystallization of nickel-bearing minerals in laterites to extract nickel from stable mineral phases under ambient conditions. Highly-weathered Australian soils contain economic quantities of nickel but technologies to extract this metal are inefficient, leaving this vital resource underdeveloped. This project will use stable isotope tracers and three-dimensional atomic-scale tomography to resolve th ....Unlocking critical metals from Australian sediments and ores. This project aims to explore the recrystallization of nickel-bearing minerals in laterites to extract nickel from stable mineral phases under ambient conditions. Highly-weathered Australian soils contain economic quantities of nickel but technologies to extract this metal are inefficient, leaving this vital resource underdeveloped. This project will use stable isotope tracers and three-dimensional atomic-scale tomography to resolve the recrystallization mechanisms, and determine their role in natural environments and their applicability to natural ores. Expected outcomes include strategies to process nickel-rich laterites, of high interest to industry and society in Australia and abroad.This project will exemplify the need to promote novel solutions to reduce the financial and environmental cost of processing natural resources.Read moreRead less
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE110100040
Funder
Australian Research Council
Funding Amount
$700,000.00
Summary
High performance electron microprobe analyser optimised for the microanalysis of sulphides and heavy elements. Understanding the chemistry of materials at micrometre scale is critical for deciphering the geological history of rocks, measuring the mobility of heavy metals in the environment and optimising the liberation of metals from ores. This new electron microprobe facility will provide more accurate results than was possible with previous instruments while increasing throughput.
Discovery Early Career Researcher Award - Grant ID: DE150101477
Funder
Australian Research Council
Funding Amount
$360,000.00
Summary
Identifying a new source of natural volatile organohalogens. Natural volatile organohalogens have recently been linked to significant atmospheric ozone depletion. The fundamental reactions controlling their emission and fate are unresolved within the international scientific literature. This project aims to use novel geochemical techniques to determine the role of ultraviolet radiation in organohalogen emissions from degraded saline and acidic landscapes. The expected outcome will shift our unde ....Identifying a new source of natural volatile organohalogens. Natural volatile organohalogens have recently been linked to significant atmospheric ozone depletion. The fundamental reactions controlling their emission and fate are unresolved within the international scientific literature. This project aims to use novel geochemical techniques to determine the role of ultraviolet radiation in organohalogen emissions from degraded saline and acidic landscapes. The expected outcome will shift our understanding of natural volatile organohalogens and predictions of stratospheric ozone recovery. The project also aims to systematically resolve the feedback between elevated ultraviolet radiation and ozone layer depletion, and is therefore highly innovative.Read moreRead less
Rehabilitation strategies for metalliferous mine wastes using native metallophytes from Pb-Zn-Ag gossans, northwest Queensland. The global area covered with mine waste is in the order of 100 million hectares containing several 100,000 million tonnes of mine wastes. The long-term sustainable rehabilitation of metal mine sites is inhibited by our lack of knowledge of metal resistance and uptake by Australian native plants. This project will evaluate metallophytes naturally growing on metal-rich so ....Rehabilitation strategies for metalliferous mine wastes using native metallophytes from Pb-Zn-Ag gossans, northwest Queensland. The global area covered with mine waste is in the order of 100 million hectares containing several 100,000 million tonnes of mine wastes. The long-term sustainable rehabilitation of metal mine sites is inhibited by our lack of knowledge of metal resistance and uptake by Australian native plants. This project will evaluate metallophytes naturally growing on metal-rich soils, northwest Queensland, for their capabilities and revegetation potential when grown in mine wastes of the Cannington Ag-Pb-Zn mine. Outcomes will include practical, innovative methods of mine site rehabilitation that are low-cost and environmentally-friendly.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE150100500
Funder
Australian Research Council
Funding Amount
$321,000.00
Summary
Electron transfer at the microbe-mineral interface via cytochromes/exudates. This project aims to develop the kinetic (both in vivo and in vitro) and thermodynamic models of the extracellular electron transfer processes at the microbe-mineral interface via outer membrane cytochromes and exudates of dissimilatory iron-reducing bacteria, and elucidating the potential electron transfer process from iron-reducing bacteria to semiconducting iron minerals. The observed models will provide a more compr ....Electron transfer at the microbe-mineral interface via cytochromes/exudates. This project aims to develop the kinetic (both in vivo and in vitro) and thermodynamic models of the extracellular electron transfer processes at the microbe-mineral interface via outer membrane cytochromes and exudates of dissimilatory iron-reducing bacteria, and elucidating the potential electron transfer process from iron-reducing bacteria to semiconducting iron minerals. The observed models will provide a more comprehensive understanding of electron transfer reactions at the microbe-mineral interface, which will be helpful in the prediction of natural redox processes of iron transformation and in the development of bioremediation strategies for contaminated sites.Read moreRead less
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE200100022
Funder
Australian Research Council
Funding Amount
$580,000.00
Summary
New frontier in Geoscience: A tandem trace element and isotopes facility. The project aims to integrate a multicollector mass spectrometer with the existing laser ablation laboratory at Southern Cross University to establish a unique facility offering tandem trace element and isotopes analysis. This will provide new methodological advancement by expanding the analytical range and obtaining information otherwise inaccessible to stand-alone instruments using traditional standardisation methods. Sp ....New frontier in Geoscience: A tandem trace element and isotopes facility. The project aims to integrate a multicollector mass spectrometer with the existing laser ablation laboratory at Southern Cross University to establish a unique facility offering tandem trace element and isotopes analysis. This will provide new methodological advancement by expanding the analytical range and obtaining information otherwise inaccessible to stand-alone instruments using traditional standardisation methods. Specifically, the integration of an innovative split stream system allows precise matching of elemental concentration with isotopic ratios, crucial for microscale resolution and data accuracy. The new infrastructure will confirm Australia’s leadership role and maintain its competitive advantage in geosciences.Read moreRead less
In the Driver's seat: role of trace elements in enabling crustal fluid flow. This proposal aims to systematically investigate the role of trace elements in controlling the kinetics, product composition, and feed-back between fluid flow and the reaction interface, in fluid-driven mineral reactions. This project expects to provide a framework for the integration of activator trace elements in models of crustal fluid flow and their application in the recovery of base, precious, and critical metals, ....In the Driver's seat: role of trace elements in enabling crustal fluid flow. This proposal aims to systematically investigate the role of trace elements in controlling the kinetics, product composition, and feed-back between fluid flow and the reaction interface, in fluid-driven mineral reactions. This project expects to provide a framework for the integration of activator trace elements in models of crustal fluid flow and their application in the recovery of base, precious, and critical metals, using interdisciplinary approaches across geochemistry, mineral engineering and material sciences. Expected outcomes include improved prediction of the transport of metals and fluids in geo-systems. This should provide significant benefits towards integrating the mineral value chain from exploration to mining and metallurgy.Read moreRead less
Nature's mechanisms for leaching and remobilising metals. This project aims to understand the chemical and physical processes that govern reactive transport and metal scavenging in rocky environments. Much of Australia's mineral wealth is the result of the interaction of warm fluids with rocks deep in the Earth over geological timescales. The formation of ore deposits is governed by the physical chemistry of mineral dissolution and crystallisation, and by fluid flow through porous rocks and frac ....Nature's mechanisms for leaching and remobilising metals. This project aims to understand the chemical and physical processes that govern reactive transport and metal scavenging in rocky environments. Much of Australia's mineral wealth is the result of the interaction of warm fluids with rocks deep in the Earth over geological timescales. The formation of ore deposits is governed by the physical chemistry of mineral dissolution and crystallisation, and by fluid flow through porous rocks and fractures. This project integrates innovation in geology, chemistry, and mineral engineering, and will deliver mineral-scale reaction models that will increase efficiency of in-situ mining and leaching technologies. Knowledge generated can be applied to improve mineral exploration, mining, and processing, contributing to unlocking billions of dollars’ worth of resources tied up in low grade, mineralogically complex ores.Read moreRead less
The timescales of Earth-system processes. This project will advance our understanding of the timescales of Earth processes using short-lived (22 to 380,000 years) isotopes. The results will provide better constraints on the timescales of magmatic processes and frequency of large-scale eruptions for volcanic hazard mitigation and also soil production rates for landscape erosion studies.
Reverse engineering nature: metal extraction through mineral replacement. This project aims to find new methods of copper recovery from low grade copper ores, which are currently uneconomic to mine. In nature, at the top of ore deposits and just below the water-table, is a region known as the supergene zone. Here mild oxidizing reactions take place causing primary ore minerals such as chalcopyrite to be replaced by more copper-rich, less refractory minerals. These processes are driven by disso ....Reverse engineering nature: metal extraction through mineral replacement. This project aims to find new methods of copper recovery from low grade copper ores, which are currently uneconomic to mine. In nature, at the top of ore deposits and just below the water-table, is a region known as the supergene zone. Here mild oxidizing reactions take place causing primary ore minerals such as chalcopyrite to be replaced by more copper-rich, less refractory minerals. These processes are driven by dissolution re-precipitation reactions (CDR reactions) and in many CDR reactions, the reaction mechanism, rather than intensive properties such as pressure and temperature, control the nature of the products and the overall reaction process. This project will explore the mechanism and controls on these reactions to see if they can be utilized in the mining industry to economically extract copper from low grade ores.
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