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Precise global time scale for the oxidation of Earth's atmosphere between 2.6 and 2.0 billion years ago. The rock record from 2600 to 2000 million years ago preserves evidence for dramatically fluctuating greenhouse and icehouse climates at the same time as, and possibly caused by, change from an oxygen-deficient to an oxygen-rich atmosphere. Although the global changes are well-documented, correlation of their timing and duration between continents is poorly constrained. This project aims to re ....Precise global time scale for the oxidation of Earth's atmosphere between 2.6 and 2.0 billion years ago. The rock record from 2600 to 2000 million years ago preserves evidence for dramatically fluctuating greenhouse and icehouse climates at the same time as, and possibly caused by, change from an oxygen-deficient to an oxygen-rich atmosphere. Although the global changes are well-documented, correlation of their timing and duration between continents is poorly constrained. This project aims to redress that problem by producing a precise calibration of the global changes by analysis of the rock records in Australia, Canada and South Africa. It will provide a much needed time framework within which long-term feedback between atmospheric composition and climate can be understood.Read moreRead less
MACQUARIE ISLAND: A UNIQUE WINDOW INTO THE OCEAN BASEMENT AND THE LINK BETWEEN OCEAN RIDGES AND OPHIOLITES. Knowledge about the composition and structure of the oceanic crust is limited due to the inaccessibility of the deep-ocean floor. Macquarie Island is the only fragment of ocean crust and mantle exposed above sea-level in the world, providing a unique opportunity to study processes of oceanic floor generation in-situ. Our project will carry out detailed mapping of the lower crust and mantle ....MACQUARIE ISLAND: A UNIQUE WINDOW INTO THE OCEAN BASEMENT AND THE LINK BETWEEN OCEAN RIDGES AND OPHIOLITES. Knowledge about the composition and structure of the oceanic crust is limited due to the inaccessibility of the deep-ocean floor. Macquarie Island is the only fragment of ocean crust and mantle exposed above sea-level in the world, providing a unique opportunity to study processes of oceanic floor generation in-situ. Our project will carry out detailed mapping of the lower crust and mantle sections on the island, followed by an integrated microstructural, petrological, and geochronological analysis of samples. Such investigations may lead to fundamental advances in the understanding of formation, deformation, and emplacement of oceanic crust at mid-ocean ridge spreading centres.Read moreRead less
Developing a new tectonothermal and mineralization history for the Capricorn Orogen, Western Australia: Assisting mineral exploration in greenfields terrains. Successful exploration models rely on the development of a reliable geological framework through which to understand the specific processes responsible for the formation of economic ore deposits. A framework cannot be constructed without robust age data. This Project will apply advanced geochronology, combined with regional- and deposit-sc ....Developing a new tectonothermal and mineralization history for the Capricorn Orogen, Western Australia: Assisting mineral exploration in greenfields terrains. Successful exploration models rely on the development of a reliable geological framework through which to understand the specific processes responsible for the formation of economic ore deposits. A framework cannot be constructed without robust age data. This Project will apply advanced geochronology, combined with regional- and deposit-scale field mapping, to formulate a new and improved stratigraphic and tectonic framework for a prospective greenfields region in Western Australia. Outcomes from this Project will lead to more effective exploration models and thereby better exploration targeting. Reducing uncertainty and risk in exploration is key to the discovery and development of deep Earth resources. Read moreRead less
Neoproterozoic global geodynamic and climatic events: were they linked? This project will study a unique cluster of global geodynamic and climatic events 850-700 million years ago that will help us to understand the interactions between the Earth's deep mantle, its crust, and its atmospheric climate. Academic values aside, the work will bring direct benefit to the Australian industry. Knowledge on the distribution of the Neoproterozoic plume events will provide new exploration targets for Ni-Cu- ....Neoproterozoic global geodynamic and climatic events: were they linked? This project will study a unique cluster of global geodynamic and climatic events 850-700 million years ago that will help us to understand the interactions between the Earth's deep mantle, its crust, and its atmospheric climate. Academic values aside, the work will bring direct benefit to the Australian industry. Knowledge on the distribution of the Neoproterozoic plume events will provide new exploration targets for Ni-Cu-PGE and V-Ti deposits. Better constrained palaeogeography will help to locate mineral-rich crustal provinces that were once connected. Understanding climatic consequences of global geodynamic events will help to better understand and respond to climate changes. Read moreRead less
Understanding the Sibao Orogenic Belt in South China: A Part of the Rodinian Supercontinent Assembly Adjacent to Australia. The Sibao Orogenic Belt (SOB) in South China is regarded as one of the worldwide 1300-1000 Ma mountain belts that record the assembly of the supercontinent Rodinia. However, recent work suggests that some of these mountain belts, including the SOB, were probably active until 900 Ma, thus questioning parts of the early Rodinia reconstructions. In this study we aim to deter ....Understanding the Sibao Orogenic Belt in South China: A Part of the Rodinian Supercontinent Assembly Adjacent to Australia. The Sibao Orogenic Belt (SOB) in South China is regarded as one of the worldwide 1300-1000 Ma mountain belts that record the assembly of the supercontinent Rodinia. However, recent work suggests that some of these mountain belts, including the SOB, were probably active until 900 Ma, thus questioning parts of the early Rodinia reconstructions. In this study we aim to determine the ages, and geochemical and structural characteristics of key tectonic units in the SOB. This will lead to a better understanding of the assembly process of Rodinia, and events occurring in continental blocks adjacent to Australia at that time.Read moreRead less
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE100100064
Funder
Australian Research Council
Funding Amount
$450,000.00
Summary
A facility for sensitive and precise isotopic dating of the earth's and extraterrestrial rocks. SPIDE2R will be a new generation mass spectrometer for very precise and sensitive dating and forensics applications in earth and planetary sciences, hydrology, climate studies, and nuclear and archaeological fingerprinting. The unprecedented sensitivity of this unique instrument will provide enhanced capabilities for solving long-standing problems requiring precise geological time resolution, as well ....A facility for sensitive and precise isotopic dating of the earth's and extraterrestrial rocks. SPIDE2R will be a new generation mass spectrometer for very precise and sensitive dating and forensics applications in earth and planetary sciences, hydrology, climate studies, and nuclear and archaeological fingerprinting. The unprecedented sensitivity of this unique instrument will provide enhanced capabilities for solving long-standing problems requiring precise geological time resolution, as well as opening new areas of research. It will be the instrument of choice for analysing small, rare samples such as those returned by space missions. The Australian-built high sensitivity source and ion detection systems can be retrofitted onto other mass spectrometers, opening a new area of commercialisation.Read moreRead less
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE0989649
Funder
Australian Research Council
Funding Amount
$800,000.00
Summary
The Nanoscale Characterisation Centre WA Electron Microprobe Facility. A new-generation electron microprobe will support many fields of scientific endeavour that underpin Australia's future prosperity. The ability to map element distributions in minerals and derive quantitative analyses is essential for research into the formation of ore deposits, how to find them and how to develop them in a sustainable manner. Nanotechnology and materials science hold the keys to future developments in communi ....The Nanoscale Characterisation Centre WA Electron Microprobe Facility. A new-generation electron microprobe will support many fields of scientific endeavour that underpin Australia's future prosperity. The ability to map element distributions in minerals and derive quantitative analyses is essential for research into the formation of ore deposits, how to find them and how to develop them in a sustainable manner. Nanotechnology and materials science hold the keys to future developments in communications, computing, catalysis, medicine, environmental remediation and more. By increasing the performance of the unique WA ion probe suite, the electron microprobe will contribute to new basic science and to Australia's scientific reputation for this flagship instrumentation. Read moreRead less
Accessory Mineral Microstructure and Implications for Geochronology. U-Pb geochronology of accessory minerals is widely used to constrain the timing of igneous, metamorphic and sedimentary processes. However, our current knowledge of isotope mobility in these important minerals cannot readily explain some common features of U-Pb dating. Using new developments in quantitative microstructural analysis integrated with high spatial resolution geochronology we will constrain the relationship between ....Accessory Mineral Microstructure and Implications for Geochronology. U-Pb geochronology of accessory minerals is widely used to constrain the timing of igneous, metamorphic and sedimentary processes. However, our current knowledge of isotope mobility in these important minerals cannot readily explain some common features of U-Pb dating. Using new developments in quantitative microstructural analysis integrated with high spatial resolution geochronology we will constrain the relationship between accessory minerals deformation and its effect on radiometric ages. Our results will lead to a better understanding of geochemical modification of accessory minerals and may lead to the development of new applications of geochronology and improve the dating of rock deformation.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE190101307
Funder
Australian Research Council
Funding Amount
$421,824.00
Summary
A new nano-geochronology approach to global Earth processes. This project aims to develop a new nano-geochronology tool. Geochronology is the science of determining the ages of rocks and geological events, and is key to answering fundamental questions of planetary evolution, the geological processes that shaped our Earth, and evolution of life and past climates. Many valuable mineral phases are too small to be dated by conventional methods. The potential that nano-geochronology has to unlock inf ....A new nano-geochronology approach to global Earth processes. This project aims to develop a new nano-geochronology tool. Geochronology is the science of determining the ages of rocks and geological events, and is key to answering fundamental questions of planetary evolution, the geological processes that shaped our Earth, and evolution of life and past climates. Many valuable mineral phases are too small to be dated by conventional methods. The potential that nano-geochronology has to unlock information otherwise untraceable remains largely unexplored. The development and application of nano-geochronology will improve our understanding of the Australian crust and the field of geological mapping, which largely supports mineral exploration.Read moreRead less
Mineral reaction, deformation, and accessory phases in migmatites: What controls monazite behaviour during high-grade metamorphism? Isotopic dating of rocks and minerals has revolutionized the way we view our planet, and allowed us to attach an absolute timescale to a range of Earth processes from the evolution of life to formation of mineral deposits. Australian technology has long been at the forefront of this field, but it is apparent that our ability to date Earth materials has overtaken our ....Mineral reaction, deformation, and accessory phases in migmatites: What controls monazite behaviour during high-grade metamorphism? Isotopic dating of rocks and minerals has revolutionized the way we view our planet, and allowed us to attach an absolute timescale to a range of Earth processes from the evolution of life to formation of mineral deposits. Australian technology has long been at the forefront of this field, but it is apparent that our ability to date Earth materials has overtaken our ability to interpret these ages in terms of geologic processes. The results of this study and the associated collaboration will ensure that Australian understanding of what isotopic ages mean keeps pace with our ability to measure them. This will allow us to resolve finer details of Earth history, and improve our understanding of the planet and how best to manage it.Read moreRead less