Understanding the deep mantle: experimental petrology at very high pressures. The great processes that shape the Earth at its surface, including plate tectonics and continental drift, can only be understood by appreciating how the interior of the Earth works. However, studying the deep Earth is difficult because of the enormous pressures and temperatures involved. This research proposes to simulate conditions in the Earth's lower mantle (that is, below 670 km in depth) by making use of an Austra ....Understanding the deep mantle: experimental petrology at very high pressures. The great processes that shape the Earth at its surface, including plate tectonics and continental drift, can only be understood by appreciating how the interior of the Earth works. However, studying the deep Earth is difficult because of the enormous pressures and temperatures involved. This research proposes to simulate conditions in the Earth's lower mantle (that is, below 670 km in depth) by making use of an Australian invented diamond-based ceramic, to double the pressure at which experiments can be performed. The information gained from this fundamental research will help predict how giant ore bodies form. The development of the high-pressure apparatus will also aid material scientists in their quest for novel materials.Read moreRead less
Seismic wavespeeds and attenuation in upper-mantle rocks: a laboratory study of the effect of partial melting. The influence of partial melting on the seismic properties of the Earth's upper mantle will be explored through a laboratory study. Synthetic rock specimens consisting of the upper-mantle mineral olivine and a small proportion of basaltic magma will be prepared and their grain-scale melt distribution will be characterised. The seismic properties of these materials will be measured at ....Seismic wavespeeds and attenuation in upper-mantle rocks: a laboratory study of the effect of partial melting. The influence of partial melting on the seismic properties of the Earth's upper mantle will be explored through a laboratory study. Synthetic rock specimens consisting of the upper-mantle mineral olivine and a small proportion of basaltic magma will be prepared and their grain-scale melt distribution will be characterised. The seismic properties of these materials will be measured at high temperatures and seismic frequencies with novel locally developed equipment. Comparison with melt-free equivalents will allow the influence of the added magma to be quantified, allowing robust interpretation of seismological models of Earth structure with implications for its chemical and dynamical evolution.Read moreRead less
GRANULAR MATERIALS IN 3D: Structural, mechanical and dynamic properties from the grain-scale and beyond. Granular materials are the most abundant class of materials processed, stored or handled. They span from cereals to advanced-new-materials and, although simple in composition, their behaviour remains elusive. Through the unique combination of an advanced X-ray tomography facility and cutting-edge 3D network analysis and statistical mechanics approach, the structure, mechanics and dynamic be ....GRANULAR MATERIALS IN 3D: Structural, mechanical and dynamic properties from the grain-scale and beyond. Granular materials are the most abundant class of materials processed, stored or handled. They span from cereals to advanced-new-materials and, although simple in composition, their behaviour remains elusive. Through the unique combination of an advanced X-ray tomography facility and cutting-edge 3D network analysis and statistical mechanics approach, the structure, mechanics and dynamic behaviour of these systems will be explored at the grain-scale.
A greater understanding of this class of materials, which ranks second only to water on the scale of priorities of human activity, will have strong scientific, technological and economical impact in a wide range of fields from concrete to photonic-materials.Read moreRead less