A5007683428- Geological and Geochemical Analysis
- High-pressure geophysics and materials
- earthquake and tectonic studies
- Geochemistry and Geologic Mapping
- Planetary Science and Exploration
- Astro and Planetary Science
- Glass properties and applications
- Geochemistry and Elemental Analysis
- Paleontology and Stratigraphy of Fossils
- Crystal Structures and Properties
- Geological Studies and Exploration
- Hydrocarbon exploration and reservoir analysis
- Nuclear reactor physics and engineering
- Nuclear Physics and Applications
- Earth Systems and Cosmic Evolution
- Atmospheric Ozone and Climate
- Luminescence Properties of Advanced Materials
- Multiferroics and related materials
- Nuclear materials and radiation effects
- Magnetic and transport properties of perovskites and related materials
- Space Exploration and Technology
- CO2 Sequestration and Geologic Interactions
- Geology and Paleoclimatology Research
- Clay minerals and soil interactions
- 2D Materials and Applications
Macquarie University
2022-2025
ARC Centre of Excellence for Core to Crust Fluid Systems
2023
University of Bayreuth
2006-2021
Bayer (Germany)
2017
University of Tübingen
2003-2006
Far East Geological Institute
1981
The cratonic crust contains abundant mineral deposits of metals such as gold, copper and rare earths1–5 is underlain by a thick mantle lithosphere rich in the volatiles carbon, sulfur water6–8. Although are known to be key components metallogenesis9, how where they distributed their role initial enrichment have not been sufficiently explored. Here we compile contents global peridotites, identifying sulfide-rich copper-rich continental roots at depths 160–190 km margins. Our new high-pressure...
The solubility of carbon in olivine, enstatite, diopside, pyrope, MgAl2O4 spinel, wadsleyite, ringwoodite, MgSiO3–ilmenite and MgSiO3–perovskite has been quantified. Carbon-saturated crystals were grown from carbonatite melts at 900–1400 °C 1.5 to ∼ 26 GPa piston cylinder or multi-anvil presses using enriched > 99% the 13C isotope. In upper mantle silicates, increases as a function pressure maximum 12 ppm by weight olivine 11 GPa. No clear dependence on temperature, oxygen fugacity iron...
We present results from high-pressure, high-temperature experiments that generate incipient carbonate melts at mantle conditions (~90 kilometers depth and temperatures between 750° 1050°C). show these primitive can sequester sulfur in its oxidized form of sulfate, as well base precious metals lithologies peridotite pyroxenite. It is proposed sulfur–rich may be more widespread than previously thought they play a first-order role the metallogenic enhancement localized lithospheric domains....
The origin and evolution of the terrestrial nitrogen remains largely unresolved.In order to understand potential influence core-mantle separation on evolution, experiments were performed at 1.5 7.0 GPa 1600 1800 °C study isotope fractionation between coexisting liquid Fe-rich metal silicate melt.The results show that metal/silicate partition coefficient D N ranges from 1 150 d 15 metal-silicate is -3.5 ± 1.7 ‰.Calculations bulk Earth more depleted in than present-day mantle, presentday...
Abstract Reaction experiments have confirmed that phlogopite websterite can be formed by the interaction of peridotite with hydrous alkaline- or silica-rich melts. Phlogopite websterites commonly occur as xenoliths in orogenic and intraplate volcanism but do not receive much attention. We experimentally investigated melting behaviour a at 1.5 GPa (1050–1300 °C), 3.0 (1100–1500 4.5 (1200–1500 °C) to contribute understanding sources ultrapotassic rocks different settings. The solidus...
Abstract Phase relations in the system MgSiO 3 ‐Al 2 O were investigated at pressures of 27–45 GPa and temperatures 1700, 2000, 2300 K using sintered diamond tungsten carbide anvils a multianvil apparatus. The bulk compositions binary crystallize phase assemblage pyrope corundum below 27 an bridgmanite above regardless temperatures. solubility Al that increases significantly with increasing temperature. from 6.7 mol % 1700 to 21.8 2500 under constant pressure GPa. Bridgmanite becomes more...
Hydrogen distribution between nominally anhydrous minerals (NAMs) of a garnet-lherzolite under subsolidus conditions has been investigated. Separated NAMs from garnet-peridotite Patagonia (Chile) are annealed together (olivine, orthopyroxene, clinopyroxene, and garnet) using piston-cylinder at 3 GPa 1100 °C talc-pyrex cell assembly for 10, 25, 100 h. The provides enough hydrogen in the system to re-equilibrate concentrations high pressure. three coexisting (NAMs, i.e., olivine,...
Zircon is the most frequently used mineral for dating terrestrial and extraterrestrial rocks. However, system of zircon in mafic/ultramafic melts has been rarely explored experimentally existing models based on felsic, intermediate and/or synthetic systems are probably not applicable prediction survival shallow asthenosphere. In order to determine stability such natural systems, we have performed high-temperature experiments dissolution mid-ocean ridge basaltic haplobasaltic coupled with...
The accurate and precise determination of the compositions silicate glasses formed from melts containing volatile components H2O CO2 recovered high-pressure, high-temperature experiments is essential to our understanding geodynamic processes taking place within planet. Silicate are often difficult analyze chemically because formation quench crystals overgrowths on phases rapid widespread upon quenching experiments, preventing in low-SiO2 volatile-rich compositions. Here, we present conducted...
Black phosphorus is a two-dimensional semiconductor with promising properties for catalysis, energy storage, and conversion as well electronic device applications, control of its structure critical such applications. Substitutional doping by electron donating (e.g., sulfur) or accepting elements germanium) can significantly change properties, especially charge carrier concentration. Here, we report the in situ black direct synthesis from mixture red dopant high pressure synthesis. In detail,...
Abstract Understanding giant impacts requires accurate description of how extreme pressures and temperatures affect the physical properties constituent materials. Here, we report shock experiments on two polymorphs MgSiO : enstatite bridgmanite (perovskite) crystals. We obtain pressure‐density equation state to 14 Mbar more than 9 g/cm , a 40% increase in density from previous data . Density‐functional‐theory molecular dynamics (DFT‐MD) simulations provide predictions for Hugoniot curves...
We have studied the speciation of carbon monoxide in both Fe-bearing and Fe-free basaltic glasses using Raman, FTIR, Mössbauer spectroscopy. show that a band at 2110 cm-1 Raman spectrum another 2210 FTIR occur samples, implying they cannot be due to any species. This observation is consistent with 57Fe spectra, which do not evidence for Fe species zero isomer shift, as expected carbonyls. Thermodynamic calculations iron carbonyl melts under crustal upper mantle conditions may only trace...
Current theories suggest that the first continental crust on Earth, and possibly other terrestrial planets, may have been produced early in their history by direct melting of hydrated peridotite. However, conditions, mechanisms necessary ingredients for this crustal formation remain elusive. To fill gap, we conducted time-series experiments to investigate reaction serpentinite with variable proportions (from 0 87 wt%) basaltic melt at temperatures 1,250–1,300°C pressures 0.2–1.0 GPa...
The oxygen fugacity (fO
Abstract Earth's accretion history for volatile elements, and the origin of their depletions with respect to Sun primitive meteorites, continue be debated. Two end‐member scenarios propose either that elements were delivered during main phases differentiation, or Earth accreted from materials largely devoid volatiles late addition volatile‐rich materials. Experiments evaluating effect metal–silicate equilibrium on elemental isotopic distribution siderophile such as Sn can help distinguish...