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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
Experimental constraints on Platinum-Group Element geochemistry: developing lithogeochemical exploration tools for nickel-sulfides in mafic and ultramafic systems. Nickel contributes approximately $2 billion per year to Australia's export income. Currently 80% of that is coming from sulfide deposits, which are expected to be exhausted within thirty years barring significant new discoveries. Discovery rates have been declining for two decades, as the 'easy' targets have been found, despite a broa ....Experimental constraints on Platinum-Group Element geochemistry: developing lithogeochemical exploration tools for nickel-sulfides in mafic and ultramafic systems. Nickel contributes approximately $2 billion per year to Australia's export income. Currently 80% of that is coming from sulfide deposits, which are expected to be exhausted within thirty years barring significant new discoveries. Discovery rates have been declining for two decades, as the 'easy' targets have been found, despite a broad increase in nickel exploration expenditure to current levels of around $50 million per year. There is a pressing need for new data sets and techniques to allow industry to target new discoveries based on limited drill sampling of potential host rocks. This project forms part of a broader program to harness the igneous geochemistry of the platinum group elements as a powerful pathfinder in nickel exploration.Read moreRead less
Advancing diamond exploration - novel techniques for the interpretation of indicator minerals. Diamond production is an important industry in Australia, with a total export value in 2004-05 of $650 million. Most of this production comes from the Argyle Mine in Western Australia, which may be nearing the end of its productivity. Therefore, there is a need to reinvigorate exploration for diamond in Australia, in order for new and significant deposits to be discovered. The outcomes of this proposal ....Advancing diamond exploration - novel techniques for the interpretation of indicator minerals. Diamond production is an important industry in Australia, with a total export value in 2004-05 of $650 million. Most of this production comes from the Argyle Mine in Western Australia, which may be nearing the end of its productivity. Therefore, there is a need to reinvigorate exploration for diamond in Australia, in order for new and significant deposits to be discovered. The outcomes of this proposal will provide diamond exploration companies with improved mineralogical tools to assess the likely diamond grade of parts of the lithosphere sampled by kimberlite or lamproite magmas, thus better directing exploration strategies.Read moreRead less
Rates of metamorphic processes - correlating U-Pb ages with the pressure-temperature conditions of mineral growth. To determine the speed of metamorphic processes, the age obtained from accessory uranium-bearing minerals will be correlated to pressure and temperature obtained from major rock forming minerals. I will develop a new and innovative technique that uses trace element geochemistry to provide this link. The trace element partitioning between datable minerals (zircon, monazite and titani ....Rates of metamorphic processes - correlating U-Pb ages with the pressure-temperature conditions of mineral growth. To determine the speed of metamorphic processes, the age obtained from accessory uranium-bearing minerals will be correlated to pressure and temperature obtained from major rock forming minerals. I will develop a new and innovative technique that uses trace element geochemistry to provide this link. The trace element partitioning between datable minerals (zircon, monazite and titanite) and key metamorphic minerals will be investigated in natural samples and in piston cylinder experiments. I will apply this technique to the study of processes such as the exhumation of eclogites in subduction zones and the duration of granulite-facies metamorphism in lower crustal rocks.Read moreRead less
Early Evolution of the Solar System: A Planetary Perspective. A geochemical study of early solar system materials will be conducted to investigate physical conditions leading to assembly of the terrestrial planets, and the chronology of early geological events that shaped the Earth and Moon. Objects from the solar nebula and samples from the Earth, Moon, Mars, and differentiated asteroids will be studied. This research will contribute toward understanding the astrophysical environment of the inn ....Early Evolution of the Solar System: A Planetary Perspective. A geochemical study of early solar system materials will be conducted to investigate physical conditions leading to assembly of the terrestrial planets, and the chronology of early geological events that shaped the Earth and Moon. Objects from the solar nebula and samples from the Earth, Moon, Mars, and differentiated asteroids will be studied. This research will contribute toward understanding the astrophysical environment of the inner solar system, establish a high-resolution absolute timescale for early geological events, and Identify the population of solid bodies present during the initial stages of planetary development.Read moreRead less
Lithic Astronomy: The age and origin of the elements and their incorporation in the solar nebula. All heavy elements are produced in stars. The signature of nucleosynthesis is the isotopic composition of the elements and thus measurement of isotopic compositions allows nuclear astrophysics to be elucidated in the laboratory. This project will examine the linkages between stellar sites and the material in our solar system through measurement of interstellar grains and other primitive material ob ....Lithic Astronomy: The age and origin of the elements and their incorporation in the solar nebula. All heavy elements are produced in stars. The signature of nucleosynthesis is the isotopic composition of the elements and thus measurement of isotopic compositions allows nuclear astrophysics to be elucidated in the laboratory. This project will examine the linkages between stellar sites and the material in our solar system through measurement of interstellar grains and other primitive material obtained from meteorites. A chronology of processes affecting the solar nebula will be determined through measurement of radionuclides. Th/U measurements in presolar grains could allow a view of galactic chemical evolution billions of years prior to the solar nebula.Read moreRead less
Sources and processes in the early solar system - an isotopic study. Our solar system formed over 4.5 billion years ago. We aim to develop techniques that will allow us to determine the sequence of events that led to our planetary system with unprecedented detail. The same techniques can be applied to dating geological events, for example, correlating ore-forming events and dating opal formation. This project utilizes new Australian technologies that will have potential economic benefits both ....Sources and processes in the early solar system - an isotopic study. Our solar system formed over 4.5 billion years ago. We aim to develop techniques that will allow us to determine the sequence of events that led to our planetary system with unprecedented detail. The same techniques can be applied to dating geological events, for example, correlating ore-forming events and dating opal formation. This project utilizes new Australian technologies that will have potential economic benefits both in instrument sales and applications.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
In search of the sources of southeastern Australian granites: a Hf, O and U-Pb isotopic study of single zircons. Some researchers suggest that the composition of granites can be used to map their source regions 15-35 km below the Earth's surface; others disagree. Our research is designed to resolve the matter, providing a firmer basis for using granite compositions to infer crustal structure and assist in mineral exploration. The research will require the development of new analytical techniques ....In search of the sources of southeastern Australian granites: a Hf, O and U-Pb isotopic study of single zircons. Some researchers suggest that the composition of granites can be used to map their source regions 15-35 km below the Earth's surface; others disagree. Our research is designed to resolve the matter, providing a firmer basis for using granite compositions to infer crustal structure and assist in mineral exploration. The research will require the development of new analytical techniques which will greatly enhance the capacity of SHRIMP, a uniquely Australian frontier technology, in a variety of new fields, e.g. biology, environmental studies and ore genesis, each of which ultimately contributes to the social and economic well-being of the Australian community.Read moreRead less
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE0560868
Funder
Australian Research Council
Funding Amount
$552,475.00
Summary
SHRIMP SI - Microscale stable-isotope analysis in the Earth Sciences. Stable-isotope variations of elements such as oxygen, carbon, and sulphur, preserve the most profound records of environmental conditions during the geological, biological, and climatic evolution of Earth and planets. We will build a stable isotope ion microprobe (SHRIMP SI) to examine extraterrestrial and terrestrial systems in unprecedented detail. In terrestrial applications, the main issue is accuracy at the 0.01 percent ....SHRIMP SI - Microscale stable-isotope analysis in the Earth Sciences. Stable-isotope variations of elements such as oxygen, carbon, and sulphur, preserve the most profound records of environmental conditions during the geological, biological, and climatic evolution of Earth and planets. We will build a stable isotope ion microprobe (SHRIMP SI) to examine extraterrestrial and terrestrial systems in unprecedented detail. In terrestrial applications, the main issue is accuracy at the 0.01 percent level for 20-micron spots, which we can apply to studies of development of life on Earth, climatic records, weathering, and formation of ore bodies. Sample return missions of solar wind and comets will provide unique samples related to the formation of our solar system.Read moreRead less