A5035293723- Geological and Geochemical Analysis
- Geochemistry and Geologic Mapping
- Advanced Materials Characterization Techniques
- Metal Extraction and Bioleaching
- Minerals Flotation and Separation Techniques
- High-pressure geophysics and materials
- Astro and Planetary Science
- Radioactive element chemistry and processing
- Planetary Science and Exploration
- earthquake and tectonic studies
- Extraction and Separation Processes
- Geological Studies and Exploration
- Hydrocarbon exploration and reservoir analysis
- Geochemistry and Elemental Analysis
- Nuclear materials and radiation effects
- Mineral Processing and Grinding
- Nuclear Materials and Properties
- Mineralogy and Gemology Studies
- Electronic and Structural Properties of Oxides
- Ion-surface interactions and analysis
- Fusion materials and technologies
- Clay minerals and soil interactions
- Hydrogen embrittlement and corrosion behaviors in metals
- Crystal Structures and Properties
- Geomagnetism and Paleomagnetism Studies
Curtin University
2016-2025
Planetary Science Institute
2024
The University of Western Australia
2013-2017
Target (United States)
2015-2016
Atom probe yields geologically meaningful ages from nanoscale Pb-enriched dislocation loops in discordant zircon.
Auriferous sulfides, most notably pyrite (FeS2) and arsenopyrite (FeAsS), are among the important economic minerals on Earth because they can host large quantities of gold in many world’s major deposits. Here we present first atom probe study distribution to characterize three-dimensional (3D) at nanoscale provide data discriminate competing models for incorporation refractory ores. In contrast that link concentration, is shown be controlled by rate crystal growth, with slow growth promoting...
Atom probe tomography (APT) is an analytical technique that provides quantitative three‐dimensional elemental and isotopic analyses at sub‐nanometre resolution across the whole periodic table. Although developed mostly used in materials science semiconductor fields, recent years have seen increasing development application geoscience planetary disciplines. studies demonstrate compositional complexity nanoscale provide fundamental new insights into atom‐scale mechanisms taking place minerals...
Research Article| May 02, 2019 Gold, arsenic, and copper zoning in pyrite: A record of fluid chemistry growth kinetics Ya-Fei Wu; Wu 1State Key Laboratory Geological Processes Mineral Resources School Earth Resources, China University Geosciences, Wuhan 430074, China2School Planetary Sciences, Curtin University, GPO Box U1987, Perth, WA 6845, Australia Search for other works by this author on: GSW Google Scholar Denis Fougerouse; Fougerouse 2School Australia3Geoscience Atom Probe, Advanced...
A large proportion of the critical elements resources Ge, Ga, and In are associated with sphalerite in Pb-Zn ore deposits. Germanium has been proposed to be structurally bound crystal lattice. Using a combination microstructural, geochemical nanoscale observations, we show that Ge can hosted structure as well nanoparticles briartite (Cu2(Zn,Fe)GeS4). The structurally-bound was preserved undeformed grains from Saint-Salvy vein deposit (France), whereas were observed metamorphosed Arre. likely...
The supergiant Obuasi gold deposit is the largest in Paleoproterozoic Birimian terranes of West Africa with 62 Moz (past production + resources).The hosted Kumasi Group sedimentary rocks composed carbonaceous phyllites, slates, psammites, and volcaniclastic intruded by different generations felsic dikes granites.A three-stage deformation history defined for district.The D1Ob stage weakly recorded as a layer-parallel fabric indicates that bedding parallel shearing occurred during early at...
Abstract Mantle melts provide a window on processes related to global plate tectonics. The composition of chromian spinel (Cr-spinel) from mafic-ultramafic rocks has been widely used for tracing the geotectonic environments, degree mantle melting and rate mid-ocean ridge spreading. assumption is that Cr-spinel’s core (Cr# = Cr/(Cr + Al)) homogenous, insensitive post-formation modification therefore robust petrogenetic indicator. However, we demonstrate Cr-spinel can be modified by...
The Pb isotopic composition of rocks is widely used to constrain the sources and mobility melts hydrothermal fluids in Earth's crust. In many cases, appears represent mixing multiple reservoirs. However, nature, scale mechanisms responsible for are not well known. Additionally, trace element sulphide minerals routinely ore deposit research, mineral exploration environmental studies, though little known about sulphides during metamorphism deformation. To investigate a deformed Witwatersrand...
Abstract Gold (Au) is largely hosted by pyrite in a variety of hydrothermal systems, but the incorporation Au into under disequilibrium conditions remains poorly understood. We integrate synchrotron X-ray fluorescence microscopy, electron backscatter diffraction, nanoscale secondary ion mass spectrometry, and laser ablation–multicollector–inductively coupled plasma–mass spectrometry to constrain processes that sequester zoned cement breccia ores from world-class Daqiao orogenic deposit,...
Abstract Mining of “invisible gold” associated with sulfides in gold ores represents a significant proportion production worldwide. Gold hosted sulfide minerals has been proposed to be structurally bound the crystal lattice as sulfide-gold alloy and/or occur discrete metallic nanoparticles. Using combination microstructural quantification and nanoscale geochemical analyses on pyrite from an orogenic deposit, we show that dislocations deformation low-angle boundary can enriched Ni, Cu, As,...
Abstract Economic gold deposits result from a 100- to 10,000-fold enrichment in relative crustal background. In hydrothermal systems, this is achieved through the transport and accumulation of metals via deeply sourced fluids site deposition. However, generally low metal solubility Au aqueous solutions orogenic systems requires additional processes order explain high-grade formation. Reports nanoparticles veins infer that their formation linked mineralisation. leading nanoparticle nucleation...
Common Pb, the portion of non-radiogenic Pb within a U bearing mineral, needs to be accurately accounted for in order subtract its effect on U-Pb isotopic ratios so that meaningful ages can calculated. The propensity accommodate common during crystallization, or later, is different across range minerals used geochronology. Titanite frequently accommodates significant amounts Pb. However, most appropriate method correct this requires knowledge mechanism and timing incorporation; information...
Atom probe tomography (APT) is used to quantify atomic-scale elemental and isotopic compositional variations within a very small volume of material (typically <0.01 µm3). The analytical ideally contains specific or microstructural targets that can be placed the context previously characterized surface in order facilitate correct interpretation APT data. In this regard, careful targeting preparation are paramount ensure desired target, which often smaller than 100 nm, optimally located...
Understanding the mechanisms of parent-daughter isotopic mobility at nanoscale is key to rigorous interpretation U–Th–Pb data and associated dating. Until now, all geochronological studies on geological samples have relied either Transmission Electron Microscope (TEM) or Atom Probe Microscopy (APM) characterizations alone, thus suffering from respective weaknesses each technique. Here we focus monazite crystals a ∼1 Ga, ultrahigh temperature granulite Rogaland (Norway). This sample has...
Abstract Well-defined reconstruction parameters are essential to quantify the size, shape, and distribution of nanoscale features in atom probe tomography (APT) datasets. However, many minerals difficult estimate because intrinsic spatial markers, such as crystallographic planes, not usually present within datasets themselves. Using transmission and/or scanning electron microscopy imaging needle-shaped specimens before after analysis, we test various approaches provide best-fit for...