ORCID Profile
0000-0001-8601-2544
Current Organisation
Murdoch 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)
Functional Materials | Mineralogy and Crystallography | Geology | Geochemistry | Metals and Alloy Materials | Organic Geochemistry | Isotope Geochemistry
ANZSRC Socio-Economic Objective (SEO)
Expanding Knowledge in the Earth Sciences | Oil and Gas Exploration | Expanding Knowledge in Engineering | Solid Oxide Fuel Cells | Mineral Exploration not elsewhere classified |
Related Links
Publications
Geochemical and micro-textural fingerprints of boiling in pyrite
Publisher: Elsevier BV
Date: 02-2019
Dissecting the Re-Os molybdenite geochronometer
Publisher: Springer Science and Business Media LLC
Date: 22-11-2017
DOI: 10.1038/S41598-017-16380-8
Abstract: Rhenium and osmium isotopes have been used for decades to date the formation of molybdenite (MoS 2 ), a common mineral in ore deposits and the world’s main source of molybdenum and rhenium. Understanding the distribution of parent 187 Re and radiogenic daughter 187 Os isotopes in molybdenite is critical in interpreting isotopic measurements because it can compromise the accurate determination and interpretation of mineralization ages. In order to resolve the controls on the distribution of these elements, chemical and isotope mapping of MoS 2 grains from representative porphyry copper-molybdenum deposits were performed using electron microprobe and nano-scale secondary ion mass spectrometry. Our results show a heterogeneous distribution of 185,187 Re and 192 Os isotopes in MoS 2 , and that both 187 Re and 187 Os isotopes are not decoupled as previously thought. We conclude that Re and Os are structurally bound or present as nanoparticles in or next to molybdenite grains, recording a complex formation history and hindering the use of microbeam techniques for Re-Os molybdenite dating. Our study opens new avenues to explore the effects of isotope nuggeting in geochronometers.
Decoupled geochemical behavior of As and Cu in hydrothermal systems
Publisher: Geological Society of America
Date: 30-07-2009
DOI: 10.1130/G25781A.1
Giant Kiruna-type deposits form by efficient flotation of magmatic magnetite suspensions
Publisher: Geological Society of America
Date: 07-2015
DOI: 10.1130/G36650.1
Trace elements in magnetite from massive iron oxide-apatite deposits indicate a combined formation by igneous and magmatic-hydrothermal processes
Publisher: Elsevier BV
Date: 12-2015
A proposed new type of arsenian pyrite: Composition, nanostructure and geological significance
Publisher: Elsevier BV
Date: 06-2008
Crystal chemistry and radiation-induced amorphizatlon of p-coflnlte from the natural fission reactor at bangombe, gabon
Publisher: Mineralogical Society of America
Date: 05-2009
DOI: 10.2138/AM.2009.3114
A genetic link between magnetite mineralization and diorite intrusion at the El Romeral iron oxide-apatite deposit, northern Chile
Publisher: Springer Science and Business Media LLC
Date: 05-01-2018
Nanoscale liquid inclusions of As-Fe-S in arsenian pyrite
Publisher: Mineralogical Society of America
Date: 02-2009
DOI: 10.2138/AM.2009.3116
Nanogeoscience in ore systems research: Principles, methods, and applications
Publisher: Elsevier BV
Date: 11-2011
Leaching of brannerite in the ferric sulphate system. Part 2: Mineralogical transformations during leaching
Publisher: Elsevier BV
Date: 2016
Copper–arsenic decoupling in an active geothermal system: A link between pyrite and fluid composition
Publisher: Elsevier BV
Date: 05-2017
Hypoxia Favours Necrotic Versus Apoptotic Shedding of Placental Syncytiotrophoblast into the Maternal Circulation
Publisher: Elsevier BV
Date: 02-2003
Abstract: In the third trimester of normal pregnancy, the mother tolerates daily shedding of several grams of dying placental trophoblast into the maternal circulation. The balance between apoptotic and necrotic shedding is presently unknown. Since pre-ecl sia is characterized by an altered placental oxygenation and increased trophoblast shedding, we investigated the role of oxygen on the balance of apoptotic versus necrotic trophoblast shedding in vitro. We studied human trophoblast turnover in explanted villi from late first and third trimester placentas in low oxygen (2 per cent) and higher oxygen tensions (6 per cent and 18 per cent) for up to 72h. Trophoblast turnover including apoptosis and necrosis were assessed by histology, immunolocalization of Mib-1 (proliferation marker), Bcl-2 (apoptosis inhibitor), activated caspase 3 (apoptosis promoter), cytokeratin 18 neo-epitope formation (M30 antibody), TUNEL test (DNA degradation), and (3)H-cytidine and(3) H-uridine incorporations. Culture in 2 per cent oxygen increased cytotrophoblast proliferation and syncytiotrophoblast shedding by necrosis. The proteins necessary for execution of apoptosis were mostly retained in the cytotrophoblast due to lack of syncytial fusion. Culture in 6 per cent and 18 per cent oxygen reduced cytotrophoblast proliferation. Syncytial fusion occurred and activity of caspase 3 was found in the syncytiotrophoblast the latter remained intact demonstrating physiologic turnover, including apoptotic shedding. We conclude that severe placental hypoxia favours necrotic rather than apoptotic shedding of syncytial fragments into the maternal circulation. Since uteroplacental ischaemia is a significant risk factor for pre-ecl sia, these findings may explain the link between reduced uteroplacental blood flow and the systemic clinical manifestations of this disease.
Alteration of UO2+x under oxidizing conditions, Marshall Pass, Colorado, USA
Publisher: Elsevier BV
Date: 10-2007
The coupled geochemistry of Au and As in pyrite from hydrothermal ore deposits
Publisher: Elsevier BV
Date: 09-2014
Tracing formation and durability of calcite in a Punic–Roman cistern mortar (Pantelleria Island, Italy)
Publisher: Informa UK Limited
Date: 11-03-2016
DOI: 10.1080/10256016.2015.1016430
Abstract: Ancient hydraulic lime mortar preserves chemical and isotopic signatures that provide important information about historical processing and its durability. The distribution and isotopic composition of calcite in a mortar of a well-preserved Punic-Roman cistern at Pantelleria Island (Italy) was used to trace the formation conditions, durability, and in idual processing periods of the cistern mortar. The analyses of stable carbon and oxygen isotopes of calcite revealed four in idual horizons, D, E, B-1 and B-2, of mortar from the top to the bottom of the cistern floor. Volcanic and ceramic aggregates were used for the production of the mortar of horizons E/D and B-1/B-2, respectively. All horizons comprise hydraulic lime mortar characterized by a mean cementation index of 1.5 ± 1, and a constant binder to aggregate ratio of 0.31 ± 0.01. This suggests standardized and highly effective processing of the cistern. The high durability of calcite formed during carbonation of slaked lime within the matrix of the ancient mortar, and thus the excellent resistance of the hydraulic lime mortar against water, was documented by (i) a distinct positive correlation of δ(18)Ocalcite and δ(13)Ccalcite typical for carbonation through a mortar horizon, (ii) a characteristic evolution of δ(18)Ocalcite and δ(13)Ccalcite through each of the four mortar horizons lighter follow heavier isotopic values from upper to lower part of the cistern floor, and (iii) δ(18)Ocalcite varying from -10 to -5 ‰ Vienna Pee Dee belemnite (VPDB). The range of δ(18)Ocalcite values rule out recrystallization and/or neoformation of calcite through chemical attack of water stored in cistern. The combined studies of the chemical composition of the binder and the isotopic composition of the calcite in an ancient mortar provide powerful tools for elucidating the ancient techniques and processing periods. This approach helps to evaluate the durability of primary calcite and demonstrates the importance of calcite as a proxy for chemical attack and quality of the ancient inorganic binder.
Pyrite as a record of hydrothermal fluid evolution in a porphyry copper system: A SIMS/EMPA trace element study
Publisher: Elsevier BV
Date: 03-2013
Precipitation and alteration of coffinite (USiO4 ·nH 2 O) in the presence of apatite
Publisher: Schweizerbart
Date: 18-03-2010
Role of vein-phases in nanoscale sequestration of U, Nb, Ti, and Pb during the alteration of pyrochlore
Publisher: Elsevier BV
Date: 02-2015
Formation of massive iron deposits linked to explosive volcanic eruptions
Publisher: Springer Science and Business Media LLC
Date: 05-10-2018
DOI: 10.1038/S41598-018-33206-3
Abstract: The genetic link between magmas and ore deposit formation is well documented by studies of fossil hydrothermal systems associated with magmatic intrusions at depth. However, the role of explosive volcanic processes as active agents of mineralization remains unexplored owing to the fact that metals and volatiles are released into the atmosphere during the eruption of arc volcanoes. Here, we draw on observations of the uniquely preserved El Laco iron deposit in the Central Andes to shed new light on the metallogenic role of explosive volcanism that operates on a global scale. The massive magnetite (Fe 3 O 4 ) ore bodies at El Laco have surface structures remarkably similar to basaltic lava flows, stimulating controversy about their origin. A long-standing debate has endured because all proposed models were constructed based exclusively on s les collected from surface outcrops representing the uppermost and most altered portion of the deposit. We overcome this s ling bias by studying s les retrieved from several drill cores and surface outcrops. Our results reveal complex lithological, textural and geochemical variations characterized by magmatic-like features and, most notably, a systematic increase in titanium concentration of magnetite with depth that account for an evolving system transitioning from purely magmatic to magmatic-hydrothermal conditions. We conclude that El Laco, and similar deposits worldwide, formed by a synergistic combination of common magmatic processes enhanced during the evolution of caldera-related explosive volcanic systems.
Constraints on the solid solubility of Hg, Tl, and Cd in arsenian pyrite
Publisher: Mineralogical Society of America
Date: 06-2016
DOI: 10.2138/AM-2016-5603
Formation of nanoscale Th-coffinite
Publisher: Mineralogical Society of America
Date: 26-03-2012
DOI: 10.2138/AM.2012.3951
Nanoscale partitioning of Ru, Ir, and Pt in base-metal sulfides from the Caridad chromite deposit, Cuba
Publisher: Mineralogical Society of America
Date: 08-2018
DOI: 10.2138/AM-2018-6424
Synthesis and characterization of coffinite
Publisher: Elsevier BV
Date: 09-2009
Trace metal nanoparticles in pyrite
Publisher: Elsevier BV
Date: 11-2011
The chemical stability of coffinite, USiO4·nH2O; 0<n<2, associated with organic matter: A case study from Grants uranium region, New Mexico, USA
Publisher: Elsevier BV
Date: 06-2008
New contributions to the understanding of Kiruna-type iron oxide-apatite deposits revealed by magnetite ore and gangue mineral geochemistry at the El Romeral deposit, Chile
Publisher: Elsevier BV
Date: 02-2018
TRACE ELEMENT SIGNATURE OF PYRITE FROM THE LOS COLORADOS IRON OXIDE-APATITE (IOA) DEPOSIT, CHILE: A MISSING LINK BETWEEN ANDEAN IOA AND IRON OXIDE COPPER-GOLD SYSTEMS?
Publisher: Society of Economic Geologists
Date: 08-04-2016
New advances in trace element geochemistry of ore minerals and accessory phases
Publisher: Elsevier BV
Date: 03-2017
The role of bacterial sulfate reduction during dolomite precipitation: Implications from Upper Jurassic platform carbonates
Publisher: Elsevier BV
Date: 09-2015
Machine learning-assisted design of porous carbons for removing paracetamol from aqueous solutions
Publisher: Elsevier BV
Date: 10-2022
Microbeam analysis of plasma effects in synthetic mica-like compound
Publisher: Oxford University Press (OUP)
Date: 08-2008
DOI: 10.1017/S1431927608087412
Abstract: Extended abstract of a paper presented at Microscopy and Microanalysis 2008 in Albuquerque, New Mexico, USA, August 3 – August 7, 2008
Phenol Molecular Sheets Woven by Water Cavities in Hydrophobic Slit Nanospaces
Publisher: American Chemical Society (ACS)
Date: 17-11-2018
DOI: 10.1021/ACS.LANGMUIR.8B02832
Abstract: Despite extensive research over the last several decades, the microscopic characterization of topological phases of adsorbed phenol from aqueous solutions in carbon micropores (pore size < 2.0 nm), which are believed to exhibit a solid and quasi-solid character, has not been reported. Here, we present a combined experimental and molecular level study of phenol adsorption from neutral water solutions in graphitic carbon micropores. Theoretical and experimental results show high adsorption of phenol and negligible coadsorption of water in hydrophobic graphitic micropores (super-sieving effect). Graphic processing unit-accelerated molecular dynamics simulation of phenol adsorption from water solutions in a realistic model of carbon micropores reveal the formation of two-dimensional phenol crystals with a peculiar pattern of hydrophilic-hydrophobic stripes in 0.8 nm supermicropores. In wider micropores, disordered phenol assemblies with water clusters, linear chains, and cavities of various sizes are found. The highest surface density of phenol is computed in 1.8 nm supermicropores. The percolating water cluster spanning the entire pore space is found in 2.0 nm supermicropores. Our findings open the door for the design of better materials for purification of aqueous solutions from nonelectrolyte micropollution.
Fate of trace elements during alteration of uraninite in a hydrothermal vein-type U-deposit from Marshall Pass, Colorado, USA
Publisher: Elsevier BV
Date: 10-2007
Constraints on Hf and Zr mobility in high-sulfidation epithermal systems: formation of kosnarite, KZr2(PO4)3, in the Chaquicocha gold deposit, Yanacocha district, Peru
Publisher: Springer Science and Business Media LLC
Date: 04-2015
Nanogeochemistry of hydrothermal magnetite
Publisher: Springer Science and Business Media LLC
Date: 17-05-2018
Super-sieving effect in phenol adsorption from aqueous solutions on nanoporous carbon beads
Publisher: Elsevier BV
Date: 08-2018
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Related Funding Activities
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE190100176
Start Date: 2019
End Date: 12-2019
Amount: $609,865.00
Funder: Australian Research Council
View Funded ActivityLinkage Infrastructure, Equipment And Facilities - Grant ID: LE190100053
Start Date: 2019
End Date: 06-2020
Amount: $1,267,674.00
Funder: Australian Research Council
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