From Synchrotron Characterisation of Single Fluid Inclusions to Archaean Geodynamics: An Integrated Study of Fluid-Rock Interaction in the Primitive Crust. In the primitive Earth, a wide range of phenomena including the initiation of biological activity and the formation of ore deposits were related to the mobilisation of mineralised fluids through the crust. In the Archaean craton of the Pilbara (WA), we have identified, within its tectonic framework, a crustal-scale plumbing system that channe ....From Synchrotron Characterisation of Single Fluid Inclusions to Archaean Geodynamics: An Integrated Study of Fluid-Rock Interaction in the Primitive Crust. In the primitive Earth, a wide range of phenomena including the initiation of biological activity and the formation of ore deposits were related to the mobilisation of mineralised fluids through the crust. In the Archaean craton of the Pilbara (WA), we have identified, within its tectonic framework, a crustal-scale plumbing system that channelled large volumes of mineralised hydrothermal solutions. Our objective is to understand the development of this plumbing system in relation to Archaean crustal geodynamics using a combination of structural geology, metamorphic petrology, geochronology, geochemistry, and the analysis of single-fluid inclusion using synchrotron and other X-ray sources.Read moreRead less
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE0560786
Funder
Australian Research Council
Funding Amount
$495,000.00
Summary
A ThermoFinnigan Triton high-sensitivity thermal ionisation mass spectrometer for constraining geoscience rates and environmental processes via Ra and Os analysis. The short-lived isotope 226Ra provides a powerful new tool for constraining the nature of melting and magma/fluid transport processes within the Earth. Conversely, Os isotopes can track ancient recycled components, core-mantle boundary interaction and date organic-rich sediments. The installation of a high-sensitivity thermal ionisati ....A ThermoFinnigan Triton high-sensitivity thermal ionisation mass spectrometer for constraining geoscience rates and environmental processes via Ra and Os analysis. The short-lived isotope 226Ra provides a powerful new tool for constraining the nature of melting and magma/fluid transport processes within the Earth. Conversely, Os isotopes can track ancient recycled components, core-mantle boundary interaction and date organic-rich sediments. The installation of a high-sensitivity thermal ionisation mass spectrometer at Macquarie University will enable research in these exciting endeavours and enhance a world-class analytical facility with widespread and lasting utility. Planned research will constrain deep earth processes, magma/water transport processes, magma-mantle/chromatography, volcanic hazards, ore deposit formation, controversial climatic models, soil erosion and early planet differentiation.Read moreRead less
Molecular fossils, the evolution of Earth's early oceans and the origin of the oldest oil. Australia retains undiscovered oil reserves. We believe that a change in primitive marine life forms may have fundamentally changed the chemistry of the Earth's oceans and is responsible for the world's oldest oil reserves. While these reserves have been found, and successfully commercialised, overseas, similar reservoirs in Australia remain elusive. The project will develop and apply technologies based on ....Molecular fossils, the evolution of Earth's early oceans and the origin of the oldest oil. Australia retains undiscovered oil reserves. We believe that a change in primitive marine life forms may have fundamentally changed the chemistry of the Earth's oceans and is responsible for the world's oldest oil reserves. While these reserves have been found, and successfully commercialised, overseas, similar reservoirs in Australia remain elusive. The project will develop and apply technologies based on hydrocarbon biomarkers to help determine the oil-producing rock types of Precambrian sedimentary rocks. This allows us to estimate the oil's age and predict where petroleum reservoirs may be hidden. PhD students involved in the project will gain valuable knowledge about the link between changes in ecology and the carbon cycle.Read moreRead less
Early Archaean Ecology - Exploring the Evidence and Habitats for Early (3.6-3.85 billion year old) Life. The prime scientific quest of the 21st century will be the origin of life. The earliest evidence for life is at 3.85 Ga (billion-years) in the world's oldest-known sediments from Akilia, Greenland. These rocks were contorted and heated during later crustal upheavals, and the evidence for life at 3.85 Ga is controversial. Such life would be highly significant, because then first, primitive li ....Early Archaean Ecology - Exploring the Evidence and Habitats for Early (3.6-3.85 billion year old) Life. The prime scientific quest of the 21st century will be the origin of life. The earliest evidence for life is at 3.85 Ga (billion-years) in the world's oldest-known sediments from Akilia, Greenland. These rocks were contorted and heated during later crustal upheavals, and the evidence for life at 3.85 Ga is controversial. Such life would be highly significant, because then first, primitive life arose before the known stratigraphic record. The project will extend the methods used to detect earliest life, and use Greenland rocks to explore other possible early habitats (submarine volcanic rocks and hot springs) and understand its environment.Read moreRead less
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE0883113
Funder
Australian Research Council
Funding Amount
$250,000.00
Summary
A stable-isotope mass spectrometer for novel determinations of past temperatures. Much of the Australian landscape is subject to a dry and evaporative climate, making it very difficult to use conventional geochemical techniques to estimate past temperatures, even on short timescales of tens to hundreds of years. The application of a new isotopic technique to preserved carbonate minerals (soil carbonate, shells in rivers, lakes and the ocean) avoids the difficulty of this variable evaporation, an ....A stable-isotope mass spectrometer for novel determinations of past temperatures. Much of the Australian landscape is subject to a dry and evaporative climate, making it very difficult to use conventional geochemical techniques to estimate past temperatures, even on short timescales of tens to hundreds of years. The application of a new isotopic technique to preserved carbonate minerals (soil carbonate, shells in rivers, lakes and the ocean) avoids the difficulty of this variable evaporation, and directly measures past temperatures. This will have a profound effect on our understanding of environmental changes on both short and long time scales, and permit a better understanding of the hydrological balances within the landscape.Read moreRead less
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE100100229
Funder
Australian Research Council
Funding Amount
$160,000.00
Summary
Time-of-flight mass spectrometer for analysis of complex mixtures in oils, ancient rocks, recent sediments, natural products and atmospheric aerosols. Research benefits will be:1. More effective remediation of petroleum spills through better understanding of degradation pathways, and ecotoxicological impact of spills.
2. Better understanding of the role of urban aerosols in human health impacts and climate change.
3. More effective development of finite petroleum resources by better understand ....Time-of-flight mass spectrometer for analysis of complex mixtures in oils, ancient rocks, recent sediments, natural products and atmospheric aerosols. Research benefits will be:1. More effective remediation of petroleum spills through better understanding of degradation pathways, and ecotoxicological impact of spills.
2. Better understanding of the role of urban aerosols in human health impacts and climate change.
3. More effective development of finite petroleum resources by better understanding of processes altering crude oil in the sub-surface.
4. Identification of natural products from algae, cyanobacteria, plants and mushrooms as new sources of pharmaceutical agents. 5. Improved knowledge of early evolution of life on Earth, helping maintain Australian scientists as world leaders in this field. 6. Greater understanding of the source and migration of petroleum in frontier areas.Read moreRead less
Reconstruction of anoxic and toxic conditions in Australian lakes and ancient oceans. Sustainable water quality is a critically important issue for Australia's economic and social development. To be able to predict and plan the future of Australia's lakes and estuaries, it is crucial to understand their ecological past and to determine their state prior to and post-European settlement. This project develops and applies novel methodologies to reconstruct the history of cyanobacterial blooms, eutr ....Reconstruction of anoxic and toxic conditions in Australian lakes and ancient oceans. Sustainable water quality is a critically important issue for Australia's economic and social development. To be able to predict and plan the future of Australia's lakes and estuaries, it is crucial to understand their ecological past and to determine their state prior to and post-European settlement. This project develops and applies novel methodologies to reconstruct the history of cyanobacterial blooms, eutrophication and anoxia in Australian waterways. It will help to identify human impact on water quality. The new methodologies, applied to ancient sedimentary rocks, will also yield information about the effect of environmental changes on early life on Earth, enforcing Australia's position in the study of global geochemical cycles.Read moreRead less
A new approach to the U-series dating of fossil molluscs - a major advance for the earth and archaeological sciences. The development of a reliable method for accurately determining the age of fossil shells represents a breakthrough in the ability to date marine shoreline, lake, and other shell-bearing deposits (e.g. middens). This will present new opportunities for research of significant national benefit, particularly into the effects of climate change, including linked sea-level change and me ....A new approach to the U-series dating of fossil molluscs - a major advance for the earth and archaeological sciences. The development of a reliable method for accurately determining the age of fossil shells represents a breakthrough in the ability to date marine shoreline, lake, and other shell-bearing deposits (e.g. middens). This will present new opportunities for research of significant national benefit, particularly into the effects of climate change, including linked sea-level change and melting of ice sheets, the impact of sea-level change on coastal zones, and shifts in the amount and variability of rainfall in different regions. The method may also be used to estimate the frequency and size of large storm and tsunami events, earthquake risk, and the timing of prehistoric human migration and associated environmental impacts. Read moreRead less
Deciphering the early Solar System chronology and planetary chemistry using isotope systematics of meteoritic zircon. This project addresses the early evolution of our Solar System that is one of the most important questions in Earth and Planetary sciences. It will use Australia's meteorites and innovative analytical techniques developed in Australia. High impact scientific results produced in this project will be to the national benefit in terms of international recognition of our unique capabi ....Deciphering the early Solar System chronology and planetary chemistry using isotope systematics of meteoritic zircon. This project addresses the early evolution of our Solar System that is one of the most important questions in Earth and Planetary sciences. It will use Australia's meteorites and innovative analytical techniques developed in Australia. High impact scientific results produced in this project will be to the national benefit in terms of international recognition of our unique capability in this high profile and competitive research field. Furthermore, by providing new constraints on the initial state of geochemical evolution of the terrestrial planets, this work will further our knowledge of the subsequent evolution of the Earth's mantle and crust, leading to better models for Australian continent development and its deep-Earth resources.Read moreRead less
Molecular fossils, environmental genomics and the natural history of an Australian salt lake. Increasing salinity of lakes is a critical problem for sustainable water supply in Australia. To comprehend the consequences of human-induced salinization, it is crucial to understand salt lakes at their most fundamental level. This project develops pioneering technologies to elucidate the microbial ecology and geochemistry of salt lakes in unprecedented detail. It will open new pathways to unravel how ....Molecular fossils, environmental genomics and the natural history of an Australian salt lake. Increasing salinity of lakes is a critical problem for sustainable water supply in Australia. To comprehend the consequences of human-induced salinization, it is crucial to understand salt lakes at their most fundamental level. This project develops pioneering technologies to elucidate the microbial ecology and geochemistry of salt lakes in unprecedented detail. It will open new pathways to unravel how microbial ecosystems adapt to increasing salinization, and how they reacted to climate fluctuations in the past. Students will gain multidisciplinary skills in environmental genomics, proteomics and geochemistry, a unique combination that will become decisive for understanding and preserving ecosystems on our continent.Read moreRead less