ORCID Profile
0000-0002-7288-6758
Current Organisation
Queensland University of Technology
Does something not look right? The information on this page has been harvested from data sources that may not be up to date. We continue to work with information providers to improve coverage and quality. To report an issue, use the Feedback Form.
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.
Ore Deposit Petrology | Exploration Geochemistry | Geochemistry | Geochronology | Geology | Sedimentology | Tectonics
Precious (Noble) Metal Ore Exploration | Copper Ore Exploration | Oil and Gas Exploration | Geothermal Exploration |
Publisher: Informa UK Limited
Date: 26-04-2018
Publisher: Elsevier BV
Date: 15-10-2006
Publisher: Elsevier BV
Date: 10-2003
Publisher: Geological Society of London
Date: 2010
DOI: 10.1144/SP342.12
Publisher: Elsevier BV
Date: 09-2019
Publisher: Elsevier BV
Date: 06-2000
Publisher: Elsevier BV
Date: 08-2006
Publisher: Elsevier BV
Date: 02-2022
Publisher: Geological Society of America
Date: 1996
Publisher: Wiley
Date: 09-2009
Publisher: Wiley
Date: 10-2004
Publisher: Informa UK Limited
Date: 08-2001
Publisher: Elsevier BV
Date: 05-2020
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C3NJ00990D
Abstract: Copper, platinum and palladium complexes of an oxazolidinone ligand show potential in catalysis or cytotoxicity, depending on the metal incorporated.
Publisher: Geological Society of America
Date: 1992
DOI: 10.1130/SPE272-P179
Publisher: Elsevier BV
Date: 11-2008
Publisher: Elsevier BV
Date: 09-2016
Publisher: Springer Science and Business Media LLC
Date: 09-2014
Publisher: Springer Science and Business Media LLC
Date: 14-02-2006
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3DT51296G
Abstract: Three Cu(II) complexes of bis-pyrazole based ligands have been synthesized and structurally characterized by X-ray crystallography. One of the ligand (L2) contains a methionine ester conjugated to a bis-pyrazole carboxylate through an amide linkage. The binding constant for complexes 1-3 with CT DNA are of the order of 10(4) M(-1). The crystal structure suggests that the axial Cu-O bonds (ca. 2.31(4) Å) are relatively labile and hence during the redox cycle with ascorbic acid and oxygen one or both the axial Cu-O bonds might open to promote copper oxygen reaction and generate ROS. The chemical nuclease activity of complexes 1-3 in dark, show complete relaxation of supercoiled DNA at 100 μM concentration in presence of ascorbic acid (H2A). The mechanistic investigation suggests that the complexes 1 and 2 show involvement of peroxo species whereas 3 shows involvement of both singlet oxygen and peroxo species in DNA cleavage. The singlet oxygen formation in dark is otherwise unfavourable but the presence of methionine as pendant arm in L2 might activate the generation of singlet oxygen from the metal generated peroxo species. The results of DNA cleavage studies suggest that methionine based copper(II) complexes can promote dual pathway for DNA cleavage. Probing the cytotoxic activity of these complexes on MCF-7, human breast cancer cell line shows that 3 is the most effective one with an IC50 of 70(2) μM.
Publisher: Wiley
Date: 08-10-2012
Publisher: Elsevier BV
Date: 11-2012
Publisher: Elsevier BV
Date: 2018
Publisher: Society of Economic Geologists
Date: 03-2005
Publisher: Elsevier BV
Date: 03-2026
Publisher: American Geophysical Union (AGU)
Date: 10-2006
DOI: 10.1029/2006GC001336
Publisher: Informa UK Limited
Date: 12-1998
Publisher: Elsevier BV
Date: 02-2009
Publisher: Geological Society of America
Date: 2003
DOI: 10.1130/G19653.1
Publisher: American Geophysical Union (AGU)
Date: 2018
DOI: 10.1002/2017TC004810
Publisher: University of Chicago Press
Date: 03-2007
DOI: 10.1086/510801
Publisher: Informa UK Limited
Date: 15-05-2018
Publisher: American Geophysical Union (AGU)
Date: 12-2021
DOI: 10.1029/2021TC006920
Abstract: Cambrian to Triassic subduction processes in eastern Australia produced a complex and highly contorted assembly of supra‐subduction units. However, regardless of the long history of oceanic subduction, relatively little evidence exists on oceanic terranes whose accretion onto the continental margin may have accompanied subduction processes. We present new radiolarian and petrochronological data from Devonian and Carboniferous rocks exposed in the middle of a tight orocline. Based on radiolarian biostratigraphy and U‐Pb dating of detrital zircon grains, we show that volcaniclastic rocks from the Silverwood Group and Alice Creek beds were deposited during the Late Devonian, which is later than previously thought. Trace‐element compositions of the Devonian zircons are characteristic of crystallization of magmas in an oceanic environment, thus supporting previous suggestions that the Silverwood Group was derived from an intra‐oceanic arc system. Carboniferous zircons from a nearby forearc basin unit (Mount Barney beds) exhibit a continental affinity, indicating that accretion of the Silverwood Block likely occurred before the establishment of this continental arc. A serpentinite belt that occurs adjacent to the Silverwood Block might represent a remnant ophiolitic suture of the now‐consumed oceanic domain, which once separated the Silverwood Block from the eastern Gondwanan margin. Based on the assumption that such an intervening ocean existed, we discuss alternative scenarios for the origin and accretion of the Silverwood Block. The most likely scenario involves intra‐oceanic magmatism in a marginal oceanic basin whose development was driven by trench retreat, and a subsequent accretion in response to trench advance and/or slab flattening.
Publisher: Elsevier BV
Date: 07-2010
Publisher: Elsevier BV
Date: 04-2004
Publisher: Informa UK Limited
Date: 05-04-2017
Publisher: Elsevier BV
Date: 02-2020
Publisher: Elsevier BV
Date: 09-2008
Publisher: Society of Economic Geologists
Date: 2018
Publisher: Geological Society of America
Date: 2007
DOI: 10.1130/GES00138.1
Publisher: Springer Science and Business Media LLC
Date: 27-07-2008
DOI: 10.1038/NGEO259
Publisher: Society of Economic Geologists
Date: 2007
Publisher: Elsevier BV
Date: 11-2014
DOI: 10.1016/J.JINORGBIO.2014.07.009
Abstract: The bis(3,5-dimethyl-1H- pyrazol-1yl)acetic acid (bdmpza) ligand was conjugated with tert-butyl-N-(2-aminoethyl) carbonate, methyl-2-amino-4-(methylthio)butanoate and 1,3,4,6-tetra-O-acetyl-β-d-glucosamine hydrochloride via amide coupling method to form three ligands L1-L3 which were then reacted with Zn(II) salts to form four zinc complexes (1-4). The complexes were characterized by (1)H NMR, (13)C NMR, electrospray ionization mass spectrometry (ESI-MS), FT-IR, CHN analyses. Complexes 1, 2 and 4 were also characterized by single crystal X-ray diffraction. It was found that Zn(II) salts could selectively remove the acetyl group from anomeric position leaving everything else intact. The cytotoxicity studies of the ligand and the complexes showed that the conjugation to acetylated glucosamine enhances cytotoxic ability although the complexes become more hydrophilic. Cytotoxicity studies in human breast adenocarcinoma (MCF-7), human cervical cancer (HeLa WT) and human lung adenocarcinoma (A549) showed that the acetylated glucosamine conjugation to the bis-pyrazole ligated Zn(II) complex led to 2-4 fold increase in cytotoxicity (IC50 values ca. 57-80μM) against HeLa WT and MCF-7 cell lines. The Zn(II) complex bearing the acetylated glucosamine inhibits the cell cycle in the G2/M phase of MCF-7 cell line. ICP-MS data shows more accumulation of Zn(II) inside the cell upon use of complex 4 as compared to Zn(II) salts or the other presented complexes. Further studies suggest that the mitochondrial transmembrane potential changes in the presence of complex 4 and caspase-7 is activated by Zn(II) salts but the activation is much more by complex 4 and hence there is apoptosis and dose dependent chromatin condensation/nuclear fragmentation as observed by microscopy.
Publisher: Informa UK Limited
Date: 03-10-2015
Publisher: Springer Science and Business Media LLC
Date: 27-09-2014
Publisher: Wiley
Date: 10-04-2014
DOI: 10.1002/GEA.21475
Publisher: Oxford University Press (OUP)
Date: 18-07-2020
DOI: 10.1093/PETROLOGY/EGAA078
Abstract: The generation of continental crust, its bulk composition and temporal evolution provide important records of plate tectonics and associated magma-generating processes. However, the long-term integrated effects of repeated magmatic events on crustal growth, composition and differentiation and, therefore, on crustal evolution are rarely considered. Here, we examine long-term (∼350 Myr) temporal compositional trends of granitic magmatism within a limited (∼200 km × 100 km) area in the Northern New England Orogen of Queensland, Australia to avoid lateral crustal variations in order to understand how temporal–compositional variations of silicic igneous rocks record crustal evolution. Long-term temporal compositional variations are tracked using whole-rock chemistry, zircon chronochemistry and zircon Hf isotopic compositions. We particularly focus on whole-rock U, Th and K abundances and calculated heat-production values as proxies for crustal evolution, and tracking crustal sources involved in granitic magmatism. We identified two major compositional groupings within the study area that were repeatedly produced over time: compositional Group 1 comprises voluminous I-type igneous rocks emplaced during the Permo-Carboniferous and Early Cretaceous Group 2 represents mainly lower volume A-type igneous rocks of Triassic, Middle Cretaceous and Tertiary age. Importantly, these compositional groupings alternate over the 350 Myr history of granitic magmatism within the study area. Heat-production values over time exhibit a zigzag pattern and mirror zircon Hf isotopic signatures where rocks with elevated heat-production values exhibit unradiogenic (crustal) Hf isotopic compositions. We identify the composition of crustal sources, level of the crust undergoing partial melting, scale of magmatism and source crustal volume as important factors in understanding the compositional ersity of silicic igneous rocks. We interpret the two chemical groupings to reflect the following magma-generating conditions: Group 1 igneous rocks record large-scale magmatic systems triggered by extensive crustal melting of multiple lower to middle crustal sources, which produce more compositionally and isotopically uniform magma compositions that approach bulk crustal compositions. In contrast, Group 2 igneous rocks reflect smaller-scale magmatic systems generated from smaller-scale partial melting events of the middle to upper crust that produced A-type magmas. Over the long term, the successive large-scale magmatic events (recorded by Group 1 igneous rocks) through their concomitant basaltic underplating make the Hf composition of the lower crust more radiogenic, and tend to homogenize the isotopic composition of the continental crust. We consider three important coupled controls: (1) promotion of extensive crustal melting by large-scale magmatic systems, potentially blending multiple crustal sources that can also include a significant juvenile source contribution (2) melt depletion, whereby older, and potentially more unradiogenic crustal materials become more refractory (3) ‘crustal jacking’, where mantle-derived magmas are added as underplate to the crust (i.e. basification) and can shift older crustal materials to more shallow levels (potentially in concert with erosion and exhumation) and away from zones of crustal melting. Our findings highlight the importance of integrating the geological and intrusive history with whole-rock geochemical data and isotopic information, and have direct implications for continental regions that exhibit protracted igneous histories and where isotopic compositions may trend towards more juvenile compositions such as circum-Pacific or retreating accretionary orogens.
Publisher: Informa UK Limited
Date: 31-07-2022
Publisher: Springer Science and Business Media LLC
Date: 16-11-2008
Publisher: Springer Science and Business Media LLC
Date: 16-04-2018
Publisher: University of Chicago Press
Date: 05-2004
DOI: 10.1086/382758
Publisher: Elsevier BV
Date: 08-2018
Publisher: Elsevier BV
Date: 03-2009
Publisher: Mineralogical Society
Date: 12-2017
DOI: 10.1180/MINMAG.2017.081.012
Abstract: Significant uncertainty surrounds the processes involved in the formation of basalt-hosted corundum, particularly the role that the mantle plays in corundum generation. Some previous studies have suggested that trace-element ratios (namely, Cr/Ga and Ga/Mg) are useful for distinguishing two types of corundum: ‘magmatic’ and ‘metamorphic’, designations that include mantle and crustal processes. However, recent studies, including this one, have discovered transitional groups between these end-members that are difficult to classify.We used laser ablation inductively coupled plasma mass spectrometry (LA–ICP–MS) to measure trace-element concentrations in sapphire and ruby crystals from eight alluvial deposits that span a significant length of the eastern Australian gemstone belt. Additionally, we collected LA–ICP–MS U–Pb and traceelement data from zircon megacrysts atWeldborough, Tasmania, which is also within the gemstone belt. Our sapphire and ruby results reveal a continuum in trace-element compositions, an observation that raises questions regarding previous classifications that ascribe corundum from basalt-hosted gemfields to either ‘magmatic’ or ‘metamorphic’ sources. The spatial association of basalt-related gemfields in eastern Australia with a long-lived convergent margin suggests a link between corundum formation and Al-enrichment of the mantle wedge during periods of subduction.
Publisher: Geological Society of America
Date: 2008
DOI: 10.1130/G24315A.1
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C4DT03983A
Abstract: [Ru II ( η 6 - p -cym)(L)Cl](PF 6 ) is slow to hydrolyze and shows better anticancer activity in hypoxia with strong resistance to deactivation by l -glutathione.
Publisher: IOP Publishing
Date: 05-2017
Publisher: Springer Science and Business Media LLC
Date: 22-01-2010
Publisher: Elsevier BV
Date: 12-1997
Publisher: Elsevier BV
Date: 11-2007
Publisher: Geological Society of America
Date: 2006
Publisher: Cambridge University Press (CUP)
Date: 1992
DOI: 10.1017/S0263593300007872
Abstract: Most zoned plutons described in the geological literature have mafic rims and felsic cores and are referred to as “normally zoned”, whereas relatively few “reversely zoned” intrusions (felsic rims and mafic cores) have been described. That unusual zonation pattern has been variously attributed to in situ processes or to the reordering of an underlying, vertically stratified, magma chamber either by intrusion through an orifice or by emplacement of composite diapirs. The Turtle Pluton is an early Cretaceous, reversely zoned, intrusion that is ided into four facies: a Rim Sequence that is graditionally zoned from bt + ilm + muse monzogranite to hb + bt + mt + sph granodiorite a Core Facies of more homogeneous hb + bt + mt + sph granodiorite to quartz monzodiorite between these two facies, a structural discontinuity termed the Schlieren Zone and an Eastern Facies of monzogranite to granodiorite. Field relationships, distribution of strain, and geochemical and isotopic studies (including a range of initial 87 Sr/ 86 Sr from 0·7085–0·7065) suggest that the reverse zonation of the Turtle Pluton is the result of sequential emplacement of two diapirs each derived from the same underlying, vertically stratified, magma chamber, and that the Rim Sequence zonation is chiefly the result of mixing of intermediate and felsic magmas from distinct sources accompanied by minor fractional crystallisation.
Publisher: Informa UK Limited
Date: 08-2001
Publisher: American Geophysical Union (AGU)
Date: 12-2010
DOI: 10.1029/2010TC002717
Publisher: American Geophysical Union (AGU)
Date: 10-2004
DOI: 10.1029/2003TC001559
Publisher: American Geophysical Union (AGU)
Date: 02-2022
DOI: 10.1029/2021TC006940
Abstract: The last major episode of cordilleran‐style tectonism in eastern Australia was the late Paleozoic‐early Mesozoic Gondwanide Orogeny. When exactly this deformation commenced and what caused this phase of orogenesis is still debated. Using previous stratigraphic and sedimentological data from pre‐orogenic to syn‐orogenic strata, integrated with new detrital zircon U‐Pb geochronology, we investigated the onset of the Gondwanide Orogeny in the northern New England Orogen (Gogango Overfolded Zone, eastern Australia). The lowermost syn‐orogenic strata display evidence of rapid base‐level change coeval with increasingly abundant and more proximal mass‐wasting deposits, which reflect a shift to static loading‐induced subsidence and the establishment of a ∼1,600‐km long foreland basin system. The syn‐orogenic strata contain abundant detritus sourced from syn‐depositional magmatism, alongside an up‐section increase in detritus derived from uplifted older rocks of the New England Orogen. Detrital zircons show maximum depositional age of ∼276 Ma from immediately above the sequence boundary, and ∼269 Ma from an overlying formation. These results confirm previous suggestions that tectonic forcing of the orogenic hinterland affected subsidence and sedimentation patterns in the easternmost part of the basin during the middle Permian, Myr prior to deformation in the western part of the foreland basin. The onset of the Gondwanide Orogeny in eastern Australia, and in other sectors of the Gondwanan margin, likely resulted from a tectonic switch from crustal extension to contraction, which was driven by increased convergence rates due to a plate reorganization event following the final assembly of Pangea.
Publisher: Elsevier BV
Date: 30-04-2004
Publisher: University of Chicago Press
Date: 03-2008
DOI: 10.1086/527459
Publisher: Elsevier BV
Date: 09-2017
Publisher: Springer Science and Business Media LLC
Date: 13-09-2012
Publisher: Springer Science and Business Media LLC
Date: 04-02-2019
DOI: 10.1038/S41559-018-0790-1
Abstract: Leaf traits are frequently measured in ecology to provide a 'common currency' for predicting how anthropogenic pressures impact ecosystem function. Here, we test whether leaf traits consistently respond to experimental treatments across 27 globally distributed grassland sites across 4 continents. We find that specific leaf area (leaf area per unit mass)-a commonly measured morphological trait inferring shifts between plant growth strategies-did not respond to up to four years of soil nutrient additions. Leaf nitrogen, phosphorus and potassium concentrations increased in response to the addition of each respective soil nutrient. We found few significant changes in leaf traits when vertebrate herbivores were excluded in the short-term. Leaf nitrogen and potassium concentrations were positively correlated with species turnover, suggesting that interspecific trait variation was a significant predictor of leaf nitrogen and potassium, but not of leaf phosphorus concentration. Climatic conditions and pretreatment soil nutrient levels also accounted for significant amounts of variation in the leaf traits measured. Overall, we find that leaf morphological traits, such as specific leaf area, are not appropriate indicators of plant response to anthropogenic perturbations in grasslands.
Publisher: American Chemical Society (ACS)
Date: 02-01-2015
DOI: 10.1021/CG501430X
Publisher: Society of Economic Geologists
Date: 17-03-2014
Publisher: Elsevier BV
Date: 03-2011
Publisher: Author(s)
Date: 2018
DOI: 10.1063/1.5038332
Publisher: Oxford University Press (OUP)
Date: 03-1997
Publisher: Elsevier BV
Date: 04-2020
Publisher: Elsevier BV
Date: 03-2011
Publisher: Springer Science and Business Media LLC
Date: 2004
Publisher: Elsevier BV
Date: 12-2006
Publisher: Elsevier BV
Date: 11-2019
Publisher: Springer Science and Business Media LLC
Date: 27-02-2014
Publisher: Springer Science and Business Media LLC
Date: 03-02-2009
Publisher: American Journal of Science (AJS)
Date: 04-2005
Publisher: Springer Science and Business Media LLC
Date: 16-08-2008
Publisher: Geological Society of America
Date: 2008
DOI: 10.1130/G24890A.1
Publisher: Elsevier BV
Date: 04-2004
Publisher: American Geophysical Union (AGU)
Date: 03-2016
DOI: 10.1002/2015TC004021
Publisher: Elsevier BV
Date: 03-2020
Publisher: Elsevier BV
Date: 05-2007
Publisher: Springer Science and Business Media LLC
Date: 21-03-2013
Publisher: Oxford University Press (OUP)
Date: 26-11-2007
Publisher: Geological Society of America
Date: 2006
Publisher: Elsevier BV
Date: 10-2015
DOI: 10.1016/J.ACA.2015.09.033
Abstract: Wet-milling protocol was employed to produce pressed powder tablets with excellent cohesion and homogeneity suitable for laser ablation (LA) analysis of volatile and refractive elements in sediment. The influence of s le preparation on analytical performance was also investigated, including s le homogeneity, accuracy and limit of detection. Milling in volatile solvent for 40 min ensured s le is well mixed and could reasonably recover both volatile (Hg) and refractive (Zr) elements. With the exception of Cr (-52%) and Nb (+26%) major, minor and trace elements in STSD-1 and MESS-3 could be analysed within ±20% of the certified values. Comparison of the method with total digestion method using HF was tested by analysing 10 different sediment s les. The laser method recovers significantly higher amounts of analytes such as Ag, Cd, Sn and Sn than the total digestion method making it a more robust method for elements across the periodic table. LA-ICP-MS also eliminates the interferences from chemical reagents as well as the health and safety risks associated with digestion processes. Therefore, it can be considered as an enhanced method for the analysis of heterogeneous matrices such as river sediments.
Publisher: IOP Publishing
Date: 06-2019
DOI: 10.1088/1757-899X/541/1/012036
Abstract: Titanium alloys are very interesting for biomedical applications due to excellent biocompatibility, corrosion resistance, lower density, and lower young modulus compared to cobalt and stainless steel alloys. However, compared to bone, young modulus of pure titanium and Ti-6Al-4V are still relatively high and the mechanical properties are still insufficient to meet the needs of biomaterials replacing the hard tissues. In this paper, a newly Ti-Mo-Nb based alloys were designed and the effect of Sn content in Ti-6Mo-6Nb-xSn alloys (x = 0,4,8 and 12 wt%) after homogenized on microstructure, hardness, and young modulus were investigated. The alloys were produced by electric vacuum arc furnace with non-consumable tungsten electrode then homogenized at 1100 °C for 7 under controlled argon atmosphere. Optical microscope, scanning electron microscopy, x-ray diffraction hardness test and ultrasonic test were used for alloys characterization. The results showed that Ti-6Mo-6Nb-xSn has equiaxed structure and Sn addition could promote the formation of β phase. The elasticity modulus of Ti-6Mo-6Nb-xSn alloy with the addition of 12% Sn was 88 GPa, this is better since it is below the elastic modulus of Ti6Al4V implant material.
Publisher: University of Chicago Press
Date: 11-2003
DOI: 10.1086/378338
Publisher: Elsevier BV
Date: 03-2009
Publisher: Elsevier BV
Date: 09-2005
Publisher: Elsevier BV
Date: 11-2010
Publisher: Society of Economic Geologists
Date: 11-2006
Publisher: Wiley
Date: 05-02-2020
DOI: 10.1002/RCM.8604
Publisher: Informa UK Limited
Date: 03-04-2023
Publisher: Informa UK Limited
Date: 08-2001
Publisher: Springer Science and Business Media LLC
Date: 15-05-2020
Publisher: American Geophysical Union (AGU)
Date: 30-07-2020
DOI: 10.1029/2019JB019075
Abstract: Establishing spatial, temporal, and geochemical relationships between magmatism and the broader tectonics of accretionary orogens is important for understanding continental crustal growth processes. Here we reconstruct the Paleozoic and Mesozoic evolution of the active continental margin of Zealandia (eastern Gondwana), using a combination of detrital zircon geochronology, trace element geochemistry and Hf isotope data. We find that zircon grains dated 360–160 Ma from New Zealand are characterized by εHf i (+15 to +2) and trace element compositions typical of predominantly juvenile magmatic sources. In contrast, the εHf i (+15 to −5) and trace element compositions of detrital zircon grains dated 245–140 Ma from New Caledonia reflect a mix of juvenile and evolved crustal sources. Secular trends in trace element and Hf isotope compositions of zircon grains suggest that magmatism and continental crustal growth in Zealandia during the Devonian‐Cretaceous were controlled by switches from trench advance to trench retreat. Orogenesis and crustal growth were controlled by a long‐lived westward dipping subduction system, which during the Permian‐Triassic, was intermittently affected by distinct phases of arc accretion (e.g., of the Brook Street intraoceanic arc) and orogenesis (e.g., driven by trench advance). These phases of orogenesis coincided with the Gondwanide Orogen (265–230 Ma), which might have been controlled by a plate‐scale reorganization event following the final assembly of Pangea supercontinent.
Publisher: Informa UK Limited
Date: 04-11-2018
Publisher: Elsevier BV
Date: 03-2007
Publisher: Springer Science and Business Media LLC
Date: 27-03-2010
Publisher: Elsevier BV
Date: 04-2013
Publisher: Elsevier BV
Date: 09-2015
Publisher: Elsevier BV
Date: 2016
Publisher: Geological Society of America
Date: 05-02-2021
DOI: 10.1130/GES02300.1
Abstract: Hafnium (Hf) isotope composition of zircon has been integrated with U-Pb age to form a long-term (& b.y.) record of the evolution of the crust. In contrast, trace element compositions of zircon are most commonly utilized in local- or regional-scale petrological studies, and the most noteworthy applications of trace element studies of detrital zircon have been in “fingerprinting” potential source lithologies. The extent to which zircon trace element compositions varied globally over geological time scales (as, for ex le, zircon U-Pb age abundance, O isotope composition, and Hf isotope composition seem to have varied) has been little explored, and it is a topic that is well suited to the large data sets produced by detrital zircon studies. In this study we present new detrital zircon U-Pb ages and trace element compositions from a continent-scale basin system in Australia (the Centralian Superbasin) that bear directly on the Proterozoic history of Australia and which may be applicable to broader interpretations of plate-tectonic processes in other regions. U-Pb ages of detrital zircon in the Centralian Superbasin are dominated by populations of ca. 1800, 1600, 1200, and 600 Ma, and secular variations of zircon Hf isotope ratios are correlated with some trace element parameters between these major age populations. In particular, elevated εHf(i) (i.e., radiogenic “juvenile” Hf isotope composition) of detrital zircon in the Centralian Superbasin tends to correspond with relatively high values of Yb/U, Ce anomaly, and Lu/Nd (i.e., depletion of light rare earth elements). These correlations seem to be fundamentally governed by three related factors: elemental compatibility in the continental crust versus mantle, the thickness of continental crust, and the contributions of sediment to magmas. Similar trace element versus εHf(i) patterns among a global zircon data set suggest broad applicability. One particularly intriguing aspect of the global zircon data set is a late Neoproterozoic to Cambrian period during which both zircon εHf(i) and Yb/U reached minima, marking an era of anomalous zircon geochemistry that was related to significant contributions from old continental crust.
Publisher: Elsevier BV
Date: 03-2007
Publisher: Geological Society of America
Date: 2005
DOI: 10.1130/B25594.1
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4NJ00715H
Abstract: A dinuclear Co III complex oxidizes 3,5-di- tert -butylcatechol by binding to two molecules of the substrate simultaneously during oxidation along with the formation of H 2 O 2 .
Publisher: GeoScienceWorld
Date: 02-2014
DOI: 10.1130/L296.1
Publisher: Elsevier BV
Date: 10-2009
Publisher: Wiley
Date: 11-09-2013
Location: United States of America
Start Date: 06-2013
End Date: 12-2018
Amount: $230,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 03-2021
End Date: 02-2024
Amount: $519,691.00
Funder: Australian Research Council
View Funded ActivityStart Date: 10-2022
End Date: 10-2025
Amount: $797,827.00
Funder: Australian Research Council
View Funded Activity