Dynamic earth models for frontier diamond exploration. This project aims to investigate the link between continent motion and mantle upwelling over the last billion years by combining tectonic reconstructions and recently developed dynamic earth models with the global and Australian rock record. Mantle upwelling is thought to cause eruptions of large volcanic provinces and kimberlites, the primary source rock for diamonds. The project expects to develop a technique to map kimberlite potential in ....Dynamic earth models for frontier diamond exploration. This project aims to investigate the link between continent motion and mantle upwelling over the last billion years by combining tectonic reconstructions and recently developed dynamic earth models with the global and Australian rock record. Mantle upwelling is thought to cause eruptions of large volcanic provinces and kimberlites, the primary source rock for diamonds. The project expects to develop a technique to map kimberlite potential in under-explored regions such as Australia. Significant benefits from the project will be the reduction of economic risks in diamond exploration, the training of a researcher in exploration geodynamics, and understanding the link between supercontinents and mantle upwelling.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE150100510
Funder
Australian Research Council
Funding Amount
$372,000.00
Summary
A new approach to revealing melting processes in the hidden deep Earth. Kimberlite magmas are very rich in volatiles (for example carbon dioxide and water); they are the major host of diamonds and provide the deepest samples from Earth's mantle. The primary compositions of these melts can provide unique information on the nature of the deep mantle. However, kimberlite melts mix and react with wall rocks on the way up, obscuring their primary composition. To see through these secondary processes, ....A new approach to revealing melting processes in the hidden deep Earth. Kimberlite magmas are very rich in volatiles (for example carbon dioxide and water); they are the major host of diamonds and provide the deepest samples from Earth's mantle. The primary compositions of these melts can provide unique information on the nature of the deep mantle. However, kimberlite melts mix and react with wall rocks on the way up, obscuring their primary composition. To see through these secondary processes, the project aims to use a novel approach integrating the study of melt inclusions in magmatic minerals with analysis of radiogenic and stable isotopes, and investigating reactions between kimberlite magmas and wall-rock fragments. The project aims to provide new understanding of the constraints on melting processes and recycling of crustal material in the deep mantle.Read moreRead less
Four dimensional lithospheric evolution and controls on mineral system distribution in Neoarchean to Paleoproterozoic terranes. This project will resolve important questions about the links between the evolution and preservation of continents and important mineral deposits in Australia and West Africa between 2.7 and 1.8 billion years ago. The results will improve the understanding of a key period of Earth history and make a major contribution to mineral exploration.
The Earth's Deep Carbon Cycle. The climate change debate has focused scientific attention on Earth’s exogene carbon-cycle. However, Earth has another, much deeper carbon-cycle which is poorly understood. In addition to exerting a profound influence on atmospheric greenhouse gas concentrations over time scales from thousands to billions of years, it is critically important in many processes in the Earth’s deep mantle. The major means by which the deep carbon-cycle is replenished is via subduction ....The Earth's Deep Carbon Cycle. The climate change debate has focused scientific attention on Earth’s exogene carbon-cycle. However, Earth has another, much deeper carbon-cycle which is poorly understood. In addition to exerting a profound influence on atmospheric greenhouse gas concentrations over time scales from thousands to billions of years, it is critically important in many processes in the Earth’s deep mantle. The major means by which the deep carbon-cycle is replenished is via subduction of carbonate-bearing oceanic crust. The project proposes a high-pressure experimental and field-based program to understand the fate of this carbonate during its journey from the exosphere, through subduction zones and into the deep mantle.Read moreRead less
Diamonds in ophiolite: recycling deep mantle into supra-subduction zones. This project aims to investigate whether the discovery of diamonds in oceanic rocks, known as ophiolites, is a global phenomenon. Even half a century after the introduction of plate tectonic theory, significant knowledge gaps remain regarding the fate of subducted lithosphere and Earth processes deep within the mantle. This project will use Australasian examples to test the hypothesis that diamonds are ubiquitous in the ma ....Diamonds in ophiolite: recycling deep mantle into supra-subduction zones. This project aims to investigate whether the discovery of diamonds in oceanic rocks, known as ophiolites, is a global phenomenon. Even half a century after the introduction of plate tectonic theory, significant knowledge gaps remain regarding the fate of subducted lithosphere and Earth processes deep within the mantle. This project will use Australasian examples to test the hypothesis that diamonds are ubiquitous in the mantle and occur widely in ophiolites. Results will have major implications for our understanding of how ocean crust grows and how rocks in the upper mantle form, as well as providing insight into how organic carbon is cycled from the seabed deep into the mantle before being returned back to Earth's surface.Read moreRead less
Continents in the Mantle Transition Zone? Sediment Recycling and the Geochemical Fertilization of the Deep Mantle. Because of its intrinsic compositional buoyancy, continental crust has traditionally been considered to be unsubductable in the denser underlying mantle. Yet some ocean island basalts carry a geochemical signature of recycled continental material in their plume source in the deep mantle. This project will reconcile this paradox through high-pressure experiments that will simulate su ....Continents in the Mantle Transition Zone? Sediment Recycling and the Geochemical Fertilization of the Deep Mantle. Because of its intrinsic compositional buoyancy, continental crust has traditionally been considered to be unsubductable in the denser underlying mantle. Yet some ocean island basalts carry a geochemical signature of recycled continental material in their plume source in the deep mantle. This project will reconcile this paradox through high-pressure experiments that will simulate subduction of continental sediments into the deep mantle. These experiments will provide the first empirical constraints on the role of sediment-derived fluids in mantle metasomatism and the origin of economically-rich potassic magmas, and the nature of the ultrarefractory continental component that ultimately reaches the plume source for ocean-island basalts.Read moreRead less
Dynamic Earth Models for Frontier Mineral Exploration. This Project aims to investigate the link between supercontinents, mantle upwelling, and associated mineral resources by combining reconstructions of mantle flow with the global rock record. Mantle upwelling causes eruptions of volcanic provinces and associated rock formations that are rich in minerals. The expected outcomes of the Project include mapping the global potential for magmatic nickel, rare-earth elements, and diamond deposits fro ....Dynamic Earth Models for Frontier Mineral Exploration. This Project aims to investigate the link between supercontinents, mantle upwelling, and associated mineral resources by combining reconstructions of mantle flow with the global rock record. Mantle upwelling causes eruptions of volcanic provinces and associated rock formations that are rich in minerals. The expected outcomes of the Project include mapping the global potential for magmatic nickel, rare-earth elements, and diamond deposits from 1.8 billion years ago and building a research alliance between the University of Wollongong, Anglo American, and De Beers. Significant benefits will be the development of a digital framework to reduce risks in exploration for minerals that are essential for the transition to a low-carbon economy.Read moreRead less
Geological applications of synchrotron radiation: magmas, fluids, ores and minerals. This project will use the Australian synchrotron facility to study magmas and minerals to improve our understanding of the formation of ore-deposits and the evolution of the continents.
Ore deposits and tectonic evolution of the Lachlan Orogen, SE Australia. Ore deposits and tectonic evolution of the Lachlan Orogen, SE Australia. This project aims to develop and test models to evaluate past tectonic processes and configurations in South-east Australia, using both new and existing geological, geophysical and isotopic data. Over the past 550 million years, plate tectonic processes have formed metal-rich mineral deposits in South-east Australia. The project will identify areas of ....Ore deposits and tectonic evolution of the Lachlan Orogen, SE Australia. Ore deposits and tectonic evolution of the Lachlan Orogen, SE Australia. This project aims to develop and test models to evaluate past tectonic processes and configurations in South-east Australia, using both new and existing geological, geophysical and isotopic data. Over the past 550 million years, plate tectonic processes have formed metal-rich mineral deposits in South-east Australia. The project will identify areas of high potential for economically valuable ore deposits, enabling more efficient prioritisation of mineral exploration efforts. This is expected to increase the probability of significant ore deposit discoveries leading to national economic benefit.Read moreRead less