ORCID Profile
0000-0002-6541-4162
Current Organisation
University of Queensland
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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.
Geochemistry | Geochronology And Isotope Geochemistry | Igneous and Metamorphic Petrology | Isotope Geochemistry | Ore Deposit Petrology | Geology | Igneous And Metamorphic Petrology | Structural Geology | Marine Geoscience | Ore Deposit Petrology
Expanding Knowledge in the Earth Sciences | Precious (Noble) Metal Ore Exploration | Copper Ore Exploration | Earth sciences |
Publisher: Elsevier BV
Date: 20-05-2008
Publisher: Elsevier BV
Date: 12-2007
Publisher: Springer Science and Business Media LLC
Date: 23-08-2014
Publisher: Springer Berlin Heidelberg
Date: 2013
Publisher: Elsevier BV
Date: 09-2014
Publisher: Springer Berlin Heidelberg
Date: 2013
Publisher: Elsevier BV
Date: 12-2006
Publisher: Elsevier BV
Date: 05-2019
Publisher: Elsevier BV
Date: 08-2013
Publisher: Elsevier BV
Date: 05-2014
Publisher: Elsevier BV
Date: 08-2001
Publisher: Wiley
Date: 09-08-2016
DOI: 10.1111/GGR.12128
Publisher: Springer Science and Business Media LLC
Date: 25-09-2011
DOI: 10.1038/NGEO1270
Publisher: Elsevier BV
Date: 07-2014
Publisher: Geological Society of London
Date: 03-2006
Publisher: Informa UK Limited
Date: 12-2012
Publisher: Geological Society of America
Date: 11-2012
DOI: 10.1130/G33221.1
Publisher: Elsevier BV
Date: 02-1970
Publisher: Geological Society of America
Date: 12-2012
DOI: 10.1130/G33265.1
Publisher: Elsevier BV
Date: 09-2011
Publisher: Elsevier BV
Date: 08-2021
Publisher: Springer Science and Business Media LLC
Date: 27-02-2017
DOI: 10.1038/NGEO2902
Publisher: American Geophysical Union (AGU)
Date: 09-2015
DOI: 10.1002/2015GC005966
Publisher: Springer Science and Business Media LLC
Date: 28-08-2012
Publisher: Elsevier BV
Date: 04-2014
Publisher: Elsevier BV
Date: 08-2018
Publisher: Informa UK Limited
Date: 06-2012
Publisher: Elsevier BV
Date: 10-2023
Publisher: Society of Economic Geologists
Date: 05-2002
Publisher: Mineralogical Society of America
Date: 02-2022
DOI: 10.2138/GSELEMENTS.18.1.21
Abstract: Halogens are important elements that participate in a variety of biogeo-chemical processes and influence the solubility of metals in subduction-zone fluids. Halogens are powerful tracers of subducted volatiles in the Earth’s mantle because they have high abundances in seawater, sediments, and altered oceanic lithosphere but low concentrations in the mantle. Additionally, Br/Cl and I/Cl ratios, as well as Cl-isotope ratios, have characteristic ranges in different surface reservoirs that are not easily fractionated in the mantle. Current data suggest that subduction of serpentinised lithosphere is a major source of halogens in the Earth’s mantle.
Publisher: Elsevier BV
Date: 04-2022
Publisher: American Geophysical Union (AGU)
Date: 12-2019
DOI: 10.1029/2018JB016858
Abstract: 809 deep IODP Hole U1473A at Atlantis Bank, SWIR, is 2.2 km from 1,508‐m Hole 735B and 1.4 from 158‐m Hole 1105A. With mapping, it provides the first 3‐D view of the upper levels of a 660‐km 2 lower crustal batholith. It is laterally and vertically zoned, representing a complex interplay of cyclic intrusion, and ongoing deformation, with kilometer‐scale upward and lateral migration of interstial melt. Transform wall es over the gabbro‐peridotite contact found only evolved gabbro intruded directly into the mantle near the transform. There was no high‐level melt lens, rather the gabbros crystallized at depth, and then emplaced into the zone of diking by diapiric rise of a crystal mush followed by crystal‐plastic deformation and faulting. The residues to mass balance the crust to a parent melt composition lie at depth below the center of the massif—likely near the crust‐mantle boundary. Thus, basalts erupted to the seafloor from ,550 mbsf. By contrast, the Mid‐Atlantic Ridge lower crust drilled at 23°N and at Atlantis Massif experienced little high‐temperature deformation and limited late‐stage melt transport. They contain primitive cumulates and represent direct intrusion, storage, and crystallization of parental MORB in thinner crust below the dike‐gabbro transition. The strong asymmetric spreading of the SWIR to the south was due to fault capture, with the northern rift valley wall faults cutoff by a detachment fault that extended across most of the zone of intrusion. This caused rapid migration of the plate boundary to the north, while the large majority of the lower crust to spread south unroofing Atlantis Bank and uplifting it into the rift mountains.
Publisher: Springer Science and Business Media LLC
Date: 05-09-2013
Publisher: Elsevier BV
Date: 2005
Publisher: Elsevier BV
Date: 03-2011
Publisher: Springer Science and Business Media LLC
Date: 24-10-2015
Publisher: Elsevier BV
Date: 2012
Publisher: Geological Society of America
Date: 10-08-2022
DOI: 10.1130/GEOL.S.20466036.V1
Abstract: Description of the methods, Figures S1–S8, and Dataset S1 (an Excel data sheet with all U-Pb, trace element, and clumped isotope data).
Publisher: Wiley
Date: 14-07-2017
DOI: 10.1111/GGR.12177
Publisher: Springer International Publishing
Date: 2016
Publisher: Geological Society of America
Date: 10-08-2022
Abstract: Description of the methods, Figures S1–S8, and Dataset S1 (an Excel data sheet with all U-Pb, trace element, and clumped isotope data).
Publisher: Society of Economic Geologists
Date: 06-2017
Publisher: Elsevier BV
Date: 03-2014
Publisher: Springer International Publishing
Date: 2018
Publisher: Elsevier BV
Date: 08-2014
Publisher: Elsevier BV
Date: 12-2013
Publisher: Elsevier BV
Date: 08-2013
Publisher: Informa UK Limited
Date: 12-2011
Publisher: Springer Science and Business Media LLC
Date: 17-11-2022
DOI: 10.1007/S00410-022-01974-X
Abstract: The concentrations of halogens in serpentinised olivine-rich lithologies in the lower oceanic crust (e.g. troctolites and wehrlites) and altered-gabbros, recovered from IODP Hole U1309D on the Atlantis Massif of the Mid-Atlantic Ridge, are contrasted. The aims were to evaluate if serpentinisation of lower crustal lithologies could significantly contribute to the volatile budget of oceanic lithosphere and test if serpentinites formed from seawater preserve seawater-like halogen signatures. The olivine-rich lithologies are variably serpentinised by lizardite with minor chrysotile. The maximum concentrations of halogens in the most strongly serpentinised s les are 70 µg/g F, 2,100 µg/g Cl, 9,800 ng/g Br and 8 ng/g I. In comparison, the maxima in interlayered gabbros are 200 µg/g F, 130 µg/g Cl, 400 ng/g Br and 9 ng/g I. The Br/Cl ratios of the altered gabbros are strongly influenced by the presence of hibole, which preferentially incorporates the smaller halides. The serpentinised lithologies have low F/Cl ratios, due to their strong enrichment in seawater-derived Cl, and they have Br/Cl and I/Cl ratios intermediate of unaltered oceanic crust and seawater-derived fluids. Br/Cl and I/Cl ratios similar to seawater are best preserved in the most Cl-rich s les consistent with these ratios fingerprinting the fluid responsible for serpentinisation. Serpentinites formed from seawater in the lower ocean crust and lithosphere are likely to have low I/Cl ratios. Serpentinsed lithologies in the lower crust (and mantle lithosphere) could, therefore, significantly contribute to halogen subduction helping to explain the range of I/Cl ratios in arc lavas and a proposed decrease of mantle I/Cl over time.
Publisher: Elsevier BV
Date: 10-2019
Publisher: Elsevier BV
Date: 07-2001
Publisher: International Ocean Discovery Program
Date: 30-01-2017
Publisher: Elsevier BV
Date: 09-2019
Publisher: Elsevier BV
Date: 2020
Publisher: Elsevier BV
Date: 04-2007
Publisher: Oxford University Press (OUP)
Date: 11-03-2014
Publisher: Cambridge University Press (CUP)
Date: 05-2004
DOI: 10.1017/S0016756803008811
Abstract: The regionally significant 0.5–2 km thick Høybakken detachment in central Norway bounds the southern margin of the Central Norway Basement Window and exhibits a well-developed top-to-the-WSW fabric characteristic of late Scandian, Devonian ductile extension. 40 Ar– 39 Ar data obtained from hornblende, mica and K-feldspar mineral separates of rocks collected in a transect through the Høybakken detachment yield well-defined plateau and isochron mineral ages. Early Devonian exhumation and cooling of the Høybakken detachment footwall is recorded by hornblende ages of ∼ 400 Ma and mica ages of ∼ 390 Ma. The mylonitic fabric overlying the footwall records younger Middle Devonian mica crystallization ages of 384–381 Ma that are among the youngest extensional ductile fabrics dated in the Caledonides and suggest prolonged extensional activity on the Høybakken detachment. After inferred cessation of ductile extension at 381 Ma, the rate of uplift and cooling was reduced, and the footwall records Late Devonian to Early Carboniferous K-feldspar ages of 371–356 Ma. Prolonged extensional activity at Høybakken is compatible with recent U–Pb ages of deformed titanite crystals and established Rb–Sr ages of white mica in shear-related pegmatites, both from the southwestern part of the Fosen Peninsula, and 40 Ar– 39 Ar ages of syn-tectonic mica overgrowth from the adjacent Hitra–Snåsa Fault. Together, these ages suggest the onset of ductile extension soon after ∼ 401 Ma, and with the Middle Devonian crystallization ages determined here, suggest that ductile extension on the Høybakken detachment had a duration of 11–20 Ma. The youngest age of 320 Ma was obtained from a K-feldspar in a cataclastic granite of the Høybakken detachment's hangingwall and is considered to date a phase of post-Scandian brittle deformation that overprinted the mylonitic shear fabric.
Publisher: Wiley
Date: 05-07-2018
DOI: 10.1111/GGR.12229
Publisher: Society of Economic Geologists
Date: 06-2011
Publisher: Elsevier BV
Date: 03-2013
Publisher: Elsevier BV
Date: 10-2022
Publisher: Elsevier BV
Date: 2015
Publisher: Elsevier BV
Date: 08-2020
Publisher: Elsevier BV
Date: 2019
Publisher: Elsevier BV
Date: 03-2012
Publisher: Springer International Publishing
Date: 2016
Publisher: Springer Science and Business Media LLC
Date: 11-03-2008
Publisher: Mineralogical Society of America
Date: 11-2019
DOI: 10.2138/AM-2019-7068
Abstract: Pyromorphite-group minerals (PyGM), mainly pyromorphite [Pb5(PO4)3Cl], mimetite [Pb5(AsO4)3Cl], and vanadinite [Pb5(VO4)3Cl], are common phases that form by supergene weathering of galena. Their formation is strongly influenced by processes at the Earth's surface and in the soil overlying a lead deposit, and they incorporate high amounts of halogens, mostly Cl and, in some cases, F. The abundance of Br and I in natural PyGM and their potential as process tracers during surface and sub-surface fluid-rock interaction processes has not been investigated in detail due to analytical difficulties. We, therefore, developed methods for the simultaneous determination of Cl, F, Br, and I in PyGM for (1) powdered bulk s les via combustion ion chromatography (CIC) and (2) compositionally zoned crystals by means of secondary ion mass spectrometry (SIMS). Our study is based on well-characterized s les of pyromorphite (N = 38), mimetite (N = 16), and vanadinite (N = 2) from Schwarzwald (Germany). Natural pyromorphite incorporates more I (up to 26 μg/g) than mimetite (up to 2 μg/g) and vanadinite (up to 1 μg/g), while Br contents are higher in mimetite (up to 20 μg/g) and vanadinite (up to 13 μg/g) compared to pyromorphite (less than 4 μg/g). These results are unexpected, as mimetite and vanadinite have longer As/V-O bonds giving them larger unit cells and larger polyhedral volumes for the Cl site in the Pb26 octahedron than pyromorphite. Accordingly, pyromorphite was expected to preferentially incorporate Br rather than I, but the opposite is observed. Hence, halogen chemistry of PyGM is probably not governed by a crystal-chemical control (alone) but by fluid composition. However, the exact reasons remain enigmatic. This idea is corroborated by spatially resolved SIMS analyses that show that many pyromorphite-group minerals are strongly zoned with respect to their halogen mass ratios (e.g., Br/Cl, Br/I mass ratios). Furthermore, variations in halogen abundance ratios do not correlate with Ca/Pb, P/As, or P/V ratios and therefore may record alternating and season-dependent environmental parameters including biological activity, vegetation density, physico-chemical soil properties, and rainfall rate. We suggest that the zonation reflects multiple single fluid flow episodes and, hence, records surface processes. However, further experiments concerning the fractionation of halogens between fluid and PyGM are needed before halogen ratios in pyromorphite-group minerals can be used as reliable monitors of fluid-driven processes.
Publisher: Geological Society of America
Date: 05-09-2022
DOI: 10.1130/G49985.1
Abstract: Newly formed oceanic crust is altered by seawater and carbonated at low temperatures over poorly defined periods of time. We applied in situ U-Pb dating to investigate 28 carbonate veins from Ocean Drilling Program Hole 801C, which is situated in the oldest Jurassic-age oceanic crust preserved in the western Pacific Ocean. Our results indicate that Pacific Ocean crust began accreting at 192 ± 6 Ma, which is ~25 m.y. earlier than previously recognized. Carbonation peaked at 171 ± 5 Ma and continued at a low rate for more than ~65 m.y. after accretion. Jurassic carbonation rates varied over ~10 m.y. timescales but encompassed a range similar to that observed today. These data suggest that carbonation rates are relatively insensitive to changes in atmospheric CO2, but confirm the longevity of seafloor alteration as a critical control in global volatile cycling.
Publisher: Elsevier BV
Date: 05-2006
Publisher: Elsevier BV
Date: 05-2006
Publisher: Mineralogical Society of America
Date: 07-2019
DOI: 10.2138/AM-2019-6887
Abstract: A series of synthetic Mid-Ocean Ridge Basalt (MORB) glasses with Fe3+/FeTOT from 0 to 1, determined previously by Mössbauer spectroscopy, were used to test methods for quantifying Fe3+/FeTOT by Raman spectroscopy. Six numerical data reduction methods were investigated, based on conventional approaches as well as supervised and unsupervised machine learning algorithms. For the set of MORB glass standards, with fixed composition, the precision of all methods was ≤±0.04 (1 St.dev.). However, Raman spectra recorded for 42 natural MORB glasses from a wide range of locations revealed a strong correlation between the spectra and composition, despite the latter varying only over a relatively limited range, such that the methods calibrated using the glass standards are not directly applicable to the natural s les. This compositional effect can be corrected by using a compositional term that links spectral variations to the Fe3+/FeTOT value of the glass. The resulting average Fe3+/FeTOT determined by Raman spectroscopy was 0.090 ± 0.067 (n = 42). This value agrees with the latest Fe K-edge XANES and wet-chemistry estimates of 0.10 ± 0.02. The larger uncertainty of the Raman determination reflects the sensitivity of Raman spectroscopy to small changes in the glass structure. While this sensitivity is detrimental for high precision Fe3+/FeTOT determinations, it allows the major element composition of natural MORB glasses to be determined within 1 mol% through the use of an artificial neural network. This suggests that Raman spectrometers may be used to determine the composition of s les in situ at difficult to access locations that are incompatible with X-ray spectrometry (e.g., mid-ocean ridges).
Publisher: Society of Economic Geologists
Date: 05-2002
Publisher: Elsevier BV
Date: 10-2009
Publisher: International Ocean Discovery Program
Date: 04-04-2016
Publisher: Springer International Publishing
Date: 2018
Publisher: Elsevier BV
Date: 02-2017
Publisher: International Ocean Discovery Program
Date: 30-01-2017
Publisher: Elsevier BV
Date: 12-2011
Publisher: Elsevier BV
Date: 30-03-2009
Publisher: Elsevier BV
Date: 09-2022
Location: United Kingdom of Great Britain and Northern Ireland
Location: United Kingdom of Great Britain and Northern Ireland
Start Date: 11-2008
End Date: 03-2012
Amount: $410,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 06-2018
End Date: 12-2023
Amount: $416,584.00
Funder: Australian Research Council
View Funded ActivityStart Date: 07-2008
End Date: 07-2013
Amount: $624,530.00
Funder: Australian Research Council
View Funded ActivityStart Date: 12-2013
End Date: 02-2018
Amount: $752,960.00
Funder: Australian Research Council
View Funded Activity