ORCID Profile
0000-0001-7362-0188
Current Organisation
Monash University
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Research Topics
In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Top 5 Research Topics
ANZSRC Field of Research (FoR)
Resources Engineering and Extractive Metallurgy not elsewhere classified | Inorganic Geochemistry | Geochemistry |
ANZSRC Socio-Economic Objective (SEO)
Primary Mining and Extraction of Mineral Resources not elsewhere classified | Copper Ore Exploration | Mining and Extraction of Copper Ores
Related Links
Publications
Selective radionuclide co-sorption onto natural minerals in environmental and anthropogenic conditions
Publisher: Elsevier BV
Date: 05-2021
A comparative bio-oxidative leaching study of synthetic U-bearing minerals: Implications for mobility and retention
Publisher: Elsevier BV
Date: 02-2021
Dynamic feldspar alteration governed by single self-evolved fluid system
Publisher: Research Square Platform LLC
Date: 28-08-2020
DOI: 10.21203/RS.3.RS-61362/V1
Abstract: The evolution of hydrothermal fluids during metasomatic and/or hydrothermal processes is responsible for the formation of ore deposits and associated alteration. In systems with well-developed breccia and fractures, mineral reactions are largely driven by decompression boiling, fluid cooling or external fluid mixing, but in less permeable rocks, elements exchanges occur at fluid-mineral interfaces, resulting in a self-evolved fluid-mineral reaction system. However, the dynamic fluid evolution leading to large-scale (km) alteration remains poorly understood. We observed experimentally that the sequential sodic and potassic alterations associated with mineralization in large ore deposits, in particular Iron Oxide Copper Gold (IOCG) deposits, can occur via a single self-evolved, originally Na-only, hydrothermal fluid, driven by a positive feedback between equilibrium and kinetic factors. Albite formed first upon reaction of sanidine ((K,Na)AlSi3O8) with a NaCl fluid at 600˚C, 2 kbar. However, with increasing reaction time, some of the initially formed albite was in-turn replaced by K-feldspar (KAlSi3O8). Fluorine accelerated the process, resulting in nearly complete back-replacement of albite within 1 day. These experiments demonstrate that potassic alteration can be induced by Na-rich fluids, and pervasive sequential sodic and potassic alterations do not necessarily reflect near-equilibrium, externally-driven changes in fluid alkali contents.
The aqueous chemistry of the copper-ammonia system and its implications for the sustainable recovery of copper
Publisher: Elsevier BV
Date: 08-2022
Selective impurity removal and Cu upgrading of copper flotation concentrate by a spontaneously oxidative H2SO4 leaching process
Publisher: Elsevier BV
Date: 08-2020
Experimental study into the beneficiation of a ferruginous rare earth bearing lateritic ore by magnetising roasting and magnetic separation
Publisher: Elsevier BV
Date: 06-2019
Lead (Pb) sorption and co-precipitation on natural sulfide, sulfate and oxide minerals under environmental conditions
Publisher: Elsevier BV
Date: 03-2021
Synthesis and characterisation of the uranium pyrochlore betafite [(Ca, U)2 (Ti, Nb, Ta)2 O7 ]
Publisher: Elsevier BV
Date: 09-2014
DOI: 10.1016/J.JHAZMAT.2014.07.062
Abstract: Betafite of composition [(Ca,U)2(Ti,Nb,Ta)2O7] was prepared via a solid state synthesis route. The synthesis was shown to be sensitive to initial reactant ratios, the atmosphere used (oxidising, neutral, reducing) and time. The optimum conditions for the synthesis of betafite were found to be heating the reactants required at 1150°C for 48 h under an inert gas atmosphere. XRD characterisation revealed that the synthesised betafite contained minor impurities. EPMA analysis of a sectioned surface showed very small regions of Ca-free betafite on grain boundaries as well as minor rutile impurities. Some heterogeneity between the Nb:Ta ratio was observed by quantitative EPMA but was generally within the nomenclature requirements stated for betafite. SEM analysis revealed the synthesised betafite was comprised mostly of hexaoctohedral crystals of ∼ 3 μm in diameter. XPS analysis of the s le showed that the uranium in the synthesised betafite was predominately present in the U(5+) oxidation state. A minor amount of U(6+) was also detected which was possibly due to surface oxidation.
Kinetics of uranium extraction from coffinite—A comparison with other common uranium minerals
Publisher: Elsevier BV
Date: 10-2018
Characterisation of a rare earth element- and zirconium-bearing ion-adsorption clay deposit in Madagascar
Publisher: Elsevier BV
Date: 09-2019
Chemical and micro-structural characterisation studies on natural uraninite and associated gangue minerals
Publisher: Elsevier BV
Date: 05-2013
An investigation on the effects of several anions on the dissolution of synthetic uraninite (UO2 )
Publisher: Elsevier BV
Date: 04-2013
An XPS and XANES study on the bioleaching of arsenopyrite with or without pyrite
Publisher: Trans Tech Publications, Ltd.
Date: 08-2017
DOI: 10.4028/WWW.SCIENTIFIC.NET/SSP.262.53
Abstract: In the present study, we investigated the bioleaching of arsenopyrite with or without pyrite by moderate thermophiles. In both chemical leaching and bioleaching, the addition of pyrite decreased the leaching rate of arsenopyrite. The arsenic speciation and minerology changes in the residues were analysed by X-ray Absorption Near Edge Structure (XANES) Spectroscopy, X-ray Photoelectron Spectroscopy (XPS) and powder X-ray Diffraction (XRD). The XANES analysis showed no detectable arsenopyrite in the final residues from the experiments without pyrite. However, there was still 21.7% of arsenic species presented as arsenopyrite after bioleaching, when the initial arsenopyrite yrite ratio was 1:5. The XPS analysis revealed there was only As(V) on the surface of most of the residues, except on one chemically leached s le where As(III) was found.
Localised solution environments drive radionuclide fractionation in uraninite
Publisher: Elsevier BV
Date: 06-2021
Love is in the Earth: A review of tellurium (bio)geochemistry in surface environments
Publisher: Elsevier BV
Date: 05-2020
The effect of [Fe]TOT on the dissolution of synthetic Pb-doped UO2 and Th-doped UO2
Publisher: Elsevier BV
Date: 04-2014
A scanning electrochemical microscopy (SECM) study of the interfacial solution chemistry at polarised chalcopyrite (CuFeS2 ) and chalcocite (Cu2 S)
Publisher: Elsevier BV
Date: 06-2020
An investigation on the effects of Fe (Fe III, Fe II) and oxidation reduction potential on the dissolution of synthetic uraninite (UO 2 )
Publisher: Elsevier BV
Date: 09-2011
Investigation into coal-based magnetizing roasting of an iron-rich rare earth ore and the associated mineralogical transformations
Publisher: Elsevier BV
Date: 12-2017
Formation of Mg-carbonates and Mg-hydroxides via calcite replacement controlled by fluid pressure
Publisher: Springer Science and Business Media LLC
Date: 23-11-2021
Characterisation of a uranium ore using multiple X-ray diffraction based methods
Publisher: Elsevier BV
Date: 08-2010
Selective removal of radioactive 210Pb(II) and nonradioactive Pb(II) isotopes from Cu(II)-rich acidic chloride solution by a new polyamine anion exchanger
Publisher: Elsevier BV
Date: 11-2020
Characterisation of a ferruginous rare earth bearing lateritic ore and implications for rare earth mineral processing
Publisher: Elsevier BV
Date: 04-2019
The dynamic uptake of lead and its radionuclides by natural and synthetic aluminium-phosphate-sulfates
Publisher: Elsevier BV
Date: 2021
Radionuclide disposal using the pyrochlore supergroup of minerals as a host matrix—A review
Publisher: Elsevier BV
Date: 10-2018
DOI: 10.1016/J.JHAZMAT.2018.08.037
Abstract: Since the first large scale commercial nuclear power plant became operational in 1958, the nuclear power industry has been faced with the growing problem of disposal of radionuclides produced from nuclear fission. The current global production of high level nuclear waste is approximately 10,000 metric tons p.a., consisting predominantly of uranium, plutonium, actinides and other minor radionuclides. Developing a safe and cost-effective method for long term storage and disposal of nuclear waste is a key issue of concern to the nuclear power industry. A promising approach to radionuclide disposal is incorporation of the nuclear waste into refractory oxide host minerals or mineral matrices. This technique offers lower leaching rates when compared to the commonly used glass-based vitrification approaches. The refractory pyrochlore supergroup of minerals are particularly attractive for this purpose as they can incorporate considerable amounts of the radionuclides:
An investigation on the dissolution of natural uraninite ores
Publisher: Elsevier BV
Date: 09-2013
Application of ferrous pyrometallurgy to the beneficiation of rare earth bearing iron ores – A review
Publisher: Elsevier BV
Date: 08-2017
Leaching and recovery of phosphate and rare earth elements from an iron-rich fluorapatite concentrate: Part II: Selective leaching of calcium and phosphate and acid baking of the residue
Publisher: Elsevier BV
Date: 03-2019
Study of the leaching and pore evolution in large particles of a sulfide ore
Publisher: Elsevier BV
Date: 03-2020
REE-, Sr-, Ca-aluminum-phosphate-sulfate minerals of the alunite supergroup and their role as hosts for radionuclides
Publisher: Mineralogical Society of America
Date: 12-2019
DOI: 10.2138/AM-2019-7116
Abstract: Aluminum-phosphate-sulfate (APS) minerals of the alunite supergroup are minor components of uranium-bearing copper ores from the Olympic Dam deposit, South Australia. They typically represent a family of paragenetically late replacement phases after pre-existing REE-bearing phosphates (fluorapatite, monazite, and xenotime). Characterization with respect to textures and composition allows two groups to be distinguished: Ca-Sr-dominant APS minerals that fall within the woodhouseite and svanbergite compositional fields and a second REE- and phosphate-dominant group closer to florencite in composition. All phases nevertheless display extensive solid solution among end-members in the broader APS clan and show extensive compositional zoning at the grain-scale. S les representative of the deposit (flotation concentrate and tailings), as well as those that have been chemically altered during the processing cycle (acid leached concentrate), were studied for comparison. NanoSIMS isotope mapping provides evidence that the APS minerals preferentially scavenge and incorporate daughter radionuclides of the 238U decay chain, notably 226Ra and 210Pb, both over geological time within the deposit and during ore processing. These data highlight the role played by minor phases as hosts for geologically mobile deleterious components in ores as well as during mineral processing. Moreover, Sr-Ca-dominant APS minerals exhibit preferential sorption of Pb from fluid sources, in the form of both common Pb and 210Pb, for the first time revealing potential pathways for 210Pb elimination and reduction from ore processing streams.
Chemical and microstructural characterisation studies on natural and heat treated brannerite samples
Publisher: Elsevier BV
Date: 12-2012
The aqueous chemistry of polonium (Po) in environmental and anthropogenic processes
Publisher: Elsevier BV
Date: 12-2019
DOI: 10.1016/J.JHAZMAT.2019.06.002
Abstract: The longest-lived naturally occurring isotope of polonium is polonium-210, one of the daughters of uranium-238 (138 days half-life). As a daughter radionuclide of radon-222, polonium-210 can become enriched in pore fluids in U-bearing rocks, leading to contents in excess of 100 Bq.g
Kinetically driven successive sodic and potassic alteration of feldspar
Publisher: Springer Science and Business Media LLC
Date: 21-07-2021
DOI: 10.1038/S41467-021-24628-1
Abstract: The dynamic evolutions of fluid-mineral systems driving large-scale geochemical transformations in the Earth’s crust remain poorly understood. We observed experimentally that successive sodic and potassic alterations of feldspar can occur via a single self-evolved, originally Na-only, hydrothermal fluid. At 600 °C, 2 kbar, sanidine ((K , Na)AlSi 3 O 8 ) reacted rapidly with a NaCl fluid to form albite (NaAlSi 3 O 8 ) over time, some of this albite was replaced by K-feldspar (KAlSi 3 O 8 ), in contrast to predictions from equilibrium reaction modelling. Fluorine accelerated the process, resulting in near-complete back-replacement of albite within 1 day. These findings reveal that potassic alteration can be triggered by Na-rich fluids, indicating that pervasive sequential sodic and potassic alterations associated with mineralization in some of the world’s largest ore deposits may not necessarily reflect externally-driven changes in fluid alkali contents. Here, we show that these reactions are promoted at the micro-scale by a self-evolving, kinetically-driven process such positive feedbacks between equilibrium and kinetic factors may be essential in driving pervasive mineral transformations.
Uranium leaching from synthetic betafite: [(Ca,U)2 (Ti,Nb,Ta)2 O7 ]
Publisher: Elsevier BV
Date: 03-2017
The effect of thermal pre-treatment on the dissolution of chalcopyrite (CuFeS2 ) in sulfuric acid media
Publisher: Elsevier BV
Date: 05-2017
Understanding the mobility and retention of uranium and its daughter products
Publisher: Elsevier BV
Date: 05-2021
Leaching behaviour of natural and heat-treated brannerite-containing uranium ores in sulphate solutions with iron(III)
Publisher: Elsevier BV
Date: 03-2014
Characterisation and leaching studies on the uranium mineral betafite [(U,Ca)2 (Nb,Ti,Ta)2 O7 ]
Publisher: Elsevier BV
Date: 10-2015
Leaching and recovery of phosphate and rare earth elements from an iron-rich fluorapatite concentrate: Part I: Direct baking of the concentrate
Publisher: Elsevier BV
Date: 05-2018
An investigation on the dissolution of synthetic brannerite (UTi 2 O6 )
Publisher: Elsevier BV
Date: 07-2013
Related Organisations
Related Funding Activities
Carbon-neutral Copper: Unlocking Metal Value Through Carbon Sequestration
Start Date: 2020
End Date: 2022
Funder: Australian Research Council
View Funded ActivityDiscovery Projects - Grant ID: DP220100500
Start Date: 05-2023
End Date: 04-2026
Amount: $472,000.00
Funder: Australian Research Council
View Funded Activity