The origin of iron formations: implications for ancient ocean chemistry and the evolution of microbial life. Iron formations host most of the world's iron reserves and are central to our understanding of ancient ocean chemistry and the diversity of microbial life. Despite their scientific importance, questions remain about their original composition and formation. Preliminary work suggests that basic assumptions about their deposition require reevaluation. This project will use new technology an ....The origin of iron formations: implications for ancient ocean chemistry and the evolution of microbial life. Iron formations host most of the world's iron reserves and are central to our understanding of ancient ocean chemistry and the diversity of microbial life. Despite their scientific importance, questions remain about their original composition and formation. Preliminary work suggests that basic assumptions about their deposition require reevaluation. This project will use new technology and novel methods to investigate the precursor sediments of iron formations and their temporal relationship with periods of global magmatism and atmospheric oxygenation. Results will be used to test and develop new depositional models for iron formations, underpinning interpretations about the composition of the Precambrian ocean, atmosphere and biosphere. Read moreRead less
Measuring mantle hydrogen to map ore fluids and model plate tectonics. The goal of this project is to use magnetotellurics to measure mantle hydrogen content to aid in the discovery of new mineral deposits. Hydrogen controls the strength of Earth’s mantle and is a vital component of the systems that form giant ore deposits. However, mantle hydrogen content is unconstrained. Ore-forming fluids hydrate the mantle pathways on which they travel. The first aim of this project is to image these fluid ....Measuring mantle hydrogen to map ore fluids and model plate tectonics. The goal of this project is to use magnetotellurics to measure mantle hydrogen content to aid in the discovery of new mineral deposits. Hydrogen controls the strength of Earth’s mantle and is a vital component of the systems that form giant ore deposits. However, mantle hydrogen content is unconstrained. Ore-forming fluids hydrate the mantle pathways on which they travel. The first aim of this project is to image these fluid pathways to improve mineral exploration techniques. Plate tectonic models assume that the lithospheric mantle is dehydrated but existing data from magnetotellurics and mantle rocks show high hydrogen contents. The second aim of this project is to create a map of the hydrogen content of the plates, which may lead to new models for continental evolution and mantle dynamics.Read moreRead less
Banded iron formations: life, oxygen and ocean chemistry. This project aims to investigate the co-evolution of life and environments during Earth’s first two billion years using iron-rich chemical sediments deposited from global oceans. The project expects to generate knowledge of Earth’s transition into a planet habitable for complex life by combining nanoscale characterisation techniques, with laboratory experiments and theoretical modelling. Expected outcomes include transformative ideas abou ....Banded iron formations: life, oxygen and ocean chemistry. This project aims to investigate the co-evolution of life and environments during Earth’s first two billion years using iron-rich chemical sediments deposited from global oceans. The project expects to generate knowledge of Earth’s transition into a planet habitable for complex life by combining nanoscale characterisation techniques, with laboratory experiments and theoretical modelling. Expected outcomes include transformative ideas about the role of life in iron and phosphorus cycles, the chemistry of the early ocean, ancient biological productivity, the antiquity of oxygenic photosynthesis and the rise of oxygen. The project will also deliver new conceptual models for the formation of the host-rocks for most of the world’s iron resources, improving how we explore for iron in the Earth’s crust. This should provide benefits to understanding geobiology on Earth and other planets.Read moreRead less
Identifying the secular evolution of chemical heterogeneity in the mantle as probed by deep mantle plumes. This project aims to focus on modes and timescales of melting associated with deep mantle plumes. These melts form massive magmatic bodies and volcanic flood basalt provinces throughout Earth’s history and record the secular chemical evolution of the Earth’s mantle. Selective igneous bodies contain high-grade noble metal deposits and coincide with global mass extinction linked to anoxic oce ....Identifying the secular evolution of chemical heterogeneity in the mantle as probed by deep mantle plumes. This project aims to focus on modes and timescales of melting associated with deep mantle plumes. These melts form massive magmatic bodies and volcanic flood basalt provinces throughout Earth’s history and record the secular chemical evolution of the Earth’s mantle. Selective igneous bodies contain high-grade noble metal deposits and coincide with global mass extinction linked to anoxic ocean events in response to atmospheric volcanic pollution. This project aims to provide knowledge of planetary surface evolution in response to mantle dynamics, place constraints on enrichment processes of metals in ore quality in plume-derived melts, and may help understandings of the relation between massive volcanic eruptions and climate variability.Read moreRead less
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE110100223
Funder
Australian Research Council
Funding Amount
$1,000,000.00
Summary
Advanced in-situ electron microscope facility for research in alloys, nanomaterials, functional materials, magnetic materials and minerals. This advanced in situ electron microscope facility will provide Australia with a new and critical capability to understand and design technologically important materials. It will enable advances in the areas of energy, environment, transport, construction and mining.