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Deep-sea coral records of Southern Ocean climate and nutrient dynamics . Deep-sea coral and seawater nutrient profiles collected from the Southern Ocean (SO) facing submarine canyons of south-west Australia will be used to provide new insights into the role of the SO overturning circulation in modulating global climate as well as supplying the essential nutrients that make these canyons biodiversity hot-spots for seasonal aggregations of killer and blue whales. This frontier project made possib ....Deep-sea coral records of Southern Ocean climate and nutrient dynamics . Deep-sea coral and seawater nutrient profiles collected from the Southern Ocean (SO) facing submarine canyons of south-west Australia will be used to provide new insights into the role of the SO overturning circulation in modulating global climate as well as supplying the essential nutrients that make these canyons biodiversity hot-spots for seasonal aggregations of killer and blue whales. This frontier project made possible by samples collected using Remote Operated Vehicle (ROV) technology rarely available in Australia, will also help to understand how SO circulation has influenced past changes in global climate and its future role in controlling ocean productivity in a warming world with rapidly increasing atmospheric carbon dioxide. Read moreRead less
Just add water: a recipe for the deformation of continental interiors. By integrating geochemical, geochronological and microstructural datasets, this project aims to provide a novel framework for fluid–rock systems in the lithosphere. Plate tectonics argues that continental interiors are usually stable, rigid and undeformable, yet mountain belts have formed in these locations. Their existence suggests that strong crust can be weakened to allow the accommodation of deforming forces, but the unde ....Just add water: a recipe for the deformation of continental interiors. By integrating geochemical, geochronological and microstructural datasets, this project aims to provide a novel framework for fluid–rock systems in the lithosphere. Plate tectonics argues that continental interiors are usually stable, rigid and undeformable, yet mountain belts have formed in these locations. Their existence suggests that strong crust can be weakened to allow the accommodation of deforming forces, but the underlying causes for this change in behaviour are not clear. This project aims to investigate the largely unexplored impact of fluid flow on the characteristics of intraplate deformation. This would improve our understanding of what modulates the strength of continental crust, including its susceptibility to seismic activity, and the ways in which fluids interact with the deep crust, including their mineralisation potential.Read moreRead less
Holding coral reefs together with soluble cement. This project aims to characterise and understand cement formation in coral reefs. Coral reefs are constructed by cementing together aragonite building blocks made by corals. The main cementing agent is high-magnesium calcite, the most soluble carbonate mineral and susceptible to ocean acidification. High-magnesium calcite cements are best developed on the high energy margins of coral reefs. This project will quantify how crustose coralline algae ....Holding coral reefs together with soluble cement. This project aims to characterise and understand cement formation in coral reefs. Coral reefs are constructed by cementing together aragonite building blocks made by corals. The main cementing agent is high-magnesium calcite, the most soluble carbonate mineral and susceptible to ocean acidification. High-magnesium calcite cements are best developed on the high energy margins of coral reefs. This project will quantify how crustose coralline algae produces high-magnesium calcite and controls the dissolution and reprecipitation of high-magnesium cements. This project intends to quantify rates of reef cementation, susceptibility to ocean acidification and warming, and possible mitigating effects of alkalinity addition.Read moreRead less
Sulfur Cycling in Toxic Oozes, Microbialites and Petroleum. This project will apply compound specific sulfur isotope analyses to sulfur-rich deposits from extreme environments including sulfidic black oozes (Peel-Harvey estuary); modern microbialites (for example, Shark Bay) and oils/source rocks (established and frontier oil fields). Sulfur isotopic data, integrated with other stable isotopic and molecular data, will greatly assist the study of sulfur biogeochemical cycles and mechanisms of org ....Sulfur Cycling in Toxic Oozes, Microbialites and Petroleum. This project will apply compound specific sulfur isotope analyses to sulfur-rich deposits from extreme environments including sulfidic black oozes (Peel-Harvey estuary); modern microbialites (for example, Shark Bay) and oils/source rocks (established and frontier oil fields). Sulfur isotopic data, integrated with other stable isotopic and molecular data, will greatly assist the study of sulfur biogeochemical cycles and mechanisms of organic sulfurisation at different diagenetic stages or geological ages. The project aims to address national concerns through measuring the respective impact of anthropogenic and natural changes on environments, helping to understand the evolution of life on Earth and contributing to efficient discovery of our natural petroleum systems.Read moreRead less
Investigation of the early history of the moon. The project will address outstanding questions related to the early evolution of planets in the solar system, including the earth, by investigating major events that took place on the moon, where the record of early history is preserved exceptionally well. It will test major models describing the chemical evolution of both the moon and earth.
Testing continental growth models with calcium and strontium isotopes. The Project aims to chart the evolution of the Earth’s primordial mantle and oceans between 3.75 and 2.8 billion years ago using calcium and strontium isotopes in ancient igneous and sedimentary rocks. A novel solution to the controversy over the timing and rate of growth of the Earth’s continents is expected. Anticipated outcomes include the establishment of innovative analytical tools for tracing geological and environmenta ....Testing continental growth models with calcium and strontium isotopes. The Project aims to chart the evolution of the Earth’s primordial mantle and oceans between 3.75 and 2.8 billion years ago using calcium and strontium isotopes in ancient igneous and sedimentary rocks. A novel solution to the controversy over the timing and rate of growth of the Earth’s continents is expected. Anticipated outcomes include the establishment of innovative analytical tools for tracing geological and environmental processes, and stronger collaborative links with premier research institutions abroad. The significant benefits of the Project include an enhanced understanding of the environment in which early life evolved, and fresh insight into the formation of the richly mineralized nucleus of the Australian continent. Read moreRead less
Consequences of extraterrestrial impacts on the biosphere and geosphere. This project will investigate whether high-velocity meteorite impacts can account for the Earth's mass extinctions and whether meteorite impacts and mass extinctions were synchronous. This work will help scientists understand the long-term climatic and biologic effects of massive injections of greenhouse gases into the atmosphere.
A detrital apatite archive to track crustal growth. This project will establish apatite as a new tool to study the evolution of the continental crust. The crust shaped the composition of the atmosphere and the oceans with consequences for the evolution of life through the availability of oxygen and nutrients. However, when and how the continental crust was generated remains a core question. Current models for continental crust development rely on the mineral zircon. However, zircons only record ....A detrital apatite archive to track crustal growth. This project will establish apatite as a new tool to study the evolution of the continental crust. The crust shaped the composition of the atmosphere and the oceans with consequences for the evolution of life through the availability of oxygen and nutrients. However, when and how the continental crust was generated remains a core question. Current models for continental crust development rely on the mineral zircon. However, zircons only record the history of evolved rocks. To address this bias we will use the mineral apatite which forms in less evolved rocks. We will develop a detrital apatite database of Pb-Nd (model) ages and integrate this with the zircon record to provide a more holistic description for how our planet developed.Read moreRead less
Nanoscale repositories of the geological record of Earth and other planets. Rhenium-Osmium (Re-Os) dating is used widely to infer Earth's evolution, but most samples are hydrated, with consequent mobility of Re, which is problematic for interpretation of isotope results. This project will solve this problem by determining the effects of hydration on Re and Os. Further, our knowledge of the mobility of Re and related elements will allow us to recognise rocks that once interacted with water, even ....Nanoscale repositories of the geological record of Earth and other planets. Rhenium-Osmium (Re-Os) dating is used widely to infer Earth's evolution, but most samples are hydrated, with consequent mobility of Re, which is problematic for interpretation of isotope results. This project will solve this problem by determining the effects of hydration on Re and Os. Further, our knowledge of the mobility of Re and related elements will allow us to recognise rocks that once interacted with water, even after that water has gone, providing a tool to read the record of Earth's earliest oceans. Our new methods will enable Re-Os dating with clarity and confidence, with profound implications for understanding of Earth and extra-terrestrial planetary evolution.Read moreRead less
Up in smoke and out to sea? Carbon, water and land use change in savanna. This project aims to improve our understanding of carbon cycling in natural and transformed savannas. It seeks to resolve a large discrepancy in savanna carbon sink size as measured by flux towers compared to long-term direct measures of carbon stock change. This would improve our fundamental understanding of carbon balances (gains/losses) and residence times in these dynamic ecosystems. The long-term impacts of these land ....Up in smoke and out to sea? Carbon, water and land use change in savanna. This project aims to improve our understanding of carbon cycling in natural and transformed savannas. It seeks to resolve a large discrepancy in savanna carbon sink size as measured by flux towers compared to long-term direct measures of carbon stock change. This would improve our fundamental understanding of carbon balances (gains/losses) and residence times in these dynamic ecosystems. The long-term impacts of these land use changes on carbon storage are poorly understood, therefore this new knowledge is vital in determining the viability of 'carbon farming' in these landscapes. More accurate information would guide improved land management given the intensification of land use, weed invasion and fire regime change in northern Australia.Read moreRead less