ORCID Profile
0000-0001-7256-6730
Current Organisation
University of Melbourne
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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.
Geology | Geochemistry | Geochronology And Isotope Geochemistry | Geochronology | Isotope Geochemistry | Geochronology | Volcanology | Vulcanology | Geomorphology | Exploration Geochemistry | Geomorphology and Regolith and Landscape Evolution | Igneous And Metamorphic Petrology | Climatology (Incl. Palaeoclimatology) | Structural Geology | Ore Deposit Petrology | Extraterrestrial Geology
Expanding Knowledge in the Earth Sciences | Earth sciences | Climate change | Mineral Resources (excl. Energy Resources) not elsewhere classified | Environment not elsewhere classified |
Publisher: Wiley
Date: 22-01-2008
Publisher: Elsevier BV
Date: 12-2011
Publisher: Elsevier BV
Date: 12-2020
Publisher: Elsevier BV
Date: 09-2014
Publisher: Informa UK Limited
Date: 06-2001
Publisher: Geological Society of America
Date: 06-2014
DOI: 10.1130/G35434.1
Publisher: Elsevier BV
Date: 08-2013
Publisher: Elsevier BV
Date: 05-2014
Publisher: Elsevier BV
Date: 02-2004
Publisher: Elsevier BV
Date: 07-2016
Publisher: American Geophysical Union (AGU)
Date: 09-2015
DOI: 10.1002/2015TC003920
Publisher: Elsevier BV
Date: 06-2009
Publisher: Elsevier BV
Date: 07-2012
Publisher: Springer Science and Business Media LLC
Date: 28-05-2018
Publisher: Geological Society of America
Date: 2007
DOI: 10.1130/G24040A.1
Publisher: Society of Economic Geologists
Date: 23-01-2015
Publisher: Society of Economic Geologists
Date: 17-11-2011
Publisher: Elsevier BV
Date: 07-2016
Publisher: Elsevier BV
Date: 2004
Publisher: American Association for the Advancement of Science (AAAS)
Date: 24-04-2020
Abstract: Diamond-bearing kimberlites were born from similar melts in the deep Earth and variably modified during ascent.
Publisher: Elsevier BV
Date: 08-2018
Publisher: Elsevier BV
Date: 11-2009
Publisher: Elsevier BV
Date: 04-2014
Publisher: Informa UK Limited
Date: 02-2011
Publisher: Elsevier BV
Date: 03-2005
Publisher: American Geophysical Union (AGU)
Date: 08-2022
DOI: 10.1029/2021GC010324
Abstract: Despite the scientific and economic significance of kimberlites and related magmas, their origin is unclear. Here, we address this issue using whole‐rock and perovskite‐derived Sr‐Nd‐Hf isotopes for the three occurrences of kimberlite, l roites and ultramafic l rophyres (UMLs) in Finland. Mesoproterozoic olivine l roites at Lentiira‐Kuhmo and UMLs at Kuusamo have different isotopic signatures yet were emplaced contemporaneously at 1,200 Ma in response to an extensional regime linked to the Baltica‐Laurentia breakup. The low εNd (i) and εHf (i) values of the olivine l roites are consistent with an enriched subcontinental lithospheric mantle (SCLM) source while UML compositions are intermediate between those of typical kimberlites and l roites and are interpreted to reflect mixing of asthenospheric melts and ∼10%–15% of melts sourced from metasomatized SCLM. The ∼750 Ma Kuusamo kimberlites, are probably linked to the mantle plume activity that initiated Rodinia's break‐up, exhibiting homogenous isotopic compositions which mirror the prominent Geodynamic and Source Constraints for ∼1,200 Ma Olivine L roite and Ultramafic L rophyre Magmatism in Eastern Finland (PREMA)‐like signature of kimberlites globally. By contrast, ∼620–585 Ma Kaavi‐Kuopio kimberlites show limited range in εNd (i) and 87 Sr/ 86 Sr (i) but have remarkably heterogeneous εHf (i) (+6.5 to −6.3) with a temporal trend toward lower εHf (i) values. While the Kuusamo kimberlites erupted during the early stage of continental break‐up, the Kaavi‐Kuopio kimberlites were emplaced when Rodinia break‐up was completed, coeval with formation of the Central Iapetus large igneous province. Magmas forming the Kaavi‐Kupio kimberlites may have formed from an upwelling mantle source similar to PREMA modified by increasing incorporation (up to 10%) of recycled crustal material through time accounting for the trend toward lower εHf (i) in these kimberlites.
Publisher: Elsevier BV
Date: 11-2005
Publisher: Elsevier BV
Date: 05-1998
Publisher: Elsevier BV
Date: 08-2015
Publisher: Wiley
Date: 16-11-2007
Publisher: Elsevier BV
Date: 09-1991
Publisher: Elsevier BV
Date: 06-2011
Publisher: Elsevier BV
Date: 09-2008
Publisher: Elsevier BV
Date: 08-2013
Publisher: American Association for the Advancement of Science (AAAS)
Date: 04-03-2022
Abstract: Earth's carbon cycle is strongly influenced by subduction of sedimentary material into the mantle. The composition of the sedimentary subduction flux has changed considerably over Earth's history, but the impact of these changes on the mantle carbon cycle is unclear. Here, we show that the carbon isotopes of kimberlite magmas record a fundamental change in their deep-mantle source compositions during the Phanerozoic Eon. The
Publisher: Elsevier BV
Date: 03-2007
Publisher: Elsevier BV
Date: 2004
Publisher: Elsevier BV
Date: 11-2015
Publisher: Elsevier BV
Date: 2002
Publisher: Society of Economic Geologists
Date: 06-2004
Publisher: Elsevier BV
Date: 04-2016
Publisher: Society of Economic Geologists
Date: 06-2011
Publisher: Oxford University Press (OUP)
Date: 24-09-2014
Publisher: Elsevier BV
Date: 03-2019
Publisher: Elsevier BV
Date: 03-2013
Publisher: Elsevier BV
Date: 07-2009
Publisher: Elsevier BV
Date: 11-2005
Publisher: Elsevier BV
Date: 11-2009
Publisher: Elsevier BV
Date: 09-2018
Publisher: American Geophysical Union (AGU)
Date: 24-05-2007
DOI: 10.1029/2006TC001979
Publisher: Elsevier BV
Date: 2017
Publisher: American Geophysical Union (AGU)
Date: 07-2021
DOI: 10.1029/2021TC006707
Abstract: The variety of temporal and structural constraints on the Alpine tectonometamorphic signature of the metamorphic core of the Betic‐Rif orogen (Alboran Domain) has supported a long‐lasting debate regarding the Alpine tectonic and geodynamic evolution of the Western Mediterranean region. Uncertainty still exists on the timing and tectonic significance of (a) the Alpine orogenic construction (b) exhumation of the deep roots of the orogen and (c) transition from orogenic shortening to crustal extension. In this study, we address these major geological issues by focusing on the lower‐grade units of the Alboran Domain (Upper Sebtides and Ghomarides) exposed in the Rif belt of northern Morocco. Through a multidisciplinary approach that integrates mesostructural and microstructural investigations with X‐ray diffraction, quantitative mineral chemistry, and 40 Ar/ 39 Ar geochronology, a 20 Ma long tectonic history is reconstructed, which involves burial of the tectonic units at depth (late Eocene) and postorogenic exhumation under brittle conditions in the upper crust (early Miocene). We document a Priabonian (∼37‐34 Ma) D 1 /M 1 progressive compressional deformation, during the formation of a SW‐verging orogenic wedge (present coordinates), accreted toward the Africa plate. Brittle extensional detachment tectonics operated during the Burdigalian (∼18‐17 Ma), controlling the thinning of the previously structured Alboran Domain nappe stack and the final exhumation of the Alpine orogenic units. We propose that transition from orogenic build‐up to collapse in the hinterland of the Betic‐Rif orogen occurred when the retreat of the Apennine‐Maghrebian subduction was efficient to drive transition from shortening to extension in the back‐arc domain of the western termination of the Apennine‐Maghrebian subduction zone.
Publisher: American Geophysical Union (AGU)
Date: 10-2016
DOI: 10.1002/2016TC004182
Publisher: Geological Society of America
Date: 2006
DOI: 10.1130/G22122.1
Publisher: Elsevier BV
Date: 30-03-2009
Publisher: Elsevier BV
Date: 12-2011
Publisher: Elsevier BV
Date: 06-2011
Publisher: Elsevier BV
Date: 20-05-2008
Publisher: Springer Science and Business Media LLC
Date: 17-04-2015
DOI: 10.1038/NCOMMS7837
Abstract: Kimberlites and orangeites (previously named Group-II kimberlites) are small-volume igneous rocks occurring in diatremes, sills and dykes. They are the main hosts for diamonds and are of scientific importance because they contain fragments of entrained mantle and crustal rocks, thus providing key information about the subcontinental lithosphere. Orangeites are ultrapotassic, H2O and CO2-rich rocks hosting minerals such as phlogopite, olivine, calcite and apatite. The major, trace element and isotopic compositions of orangeites resemble those of intensely metasomatized mantle of the type represented by MARID (mica- hibole-rutile-ilmenite-diopside) xenoliths. Here we report new data for two MARID xenoliths from the Bultfontein kimberlite (Kimberley, South Africa) and we show that MARID-veined mantle has mineralogical (carbonate-apatite) and geochemical (Sr-Nd-Hf-O isotopes) characteristics compatible with orangeite melt generation from a MARID-rich source. This interpretation is supported by U-Pb zircon ages in MARID xenoliths from the Kimberley kimberlites, which confirm MARID rock formation before orangeite magmatism in the area.
Publisher: Elsevier BV
Date: 08-2015
Publisher: Informa UK Limited
Date: 04-2008
Publisher: Elsevier BV
Date: 12-2006
Publisher: Geological Society of London
Date: 26-06-2007
Publisher: Elsevier BV
Date: 11-2009
Publisher: Geological Society of London
Date: 15-06-2023
DOI: 10.1144/JGS2022-171
Abstract: The Turkana Basin in NW Kenya and SW Ethiopia hosts remarkable fossil-rich sediments that are central to our understanding of early hominin evolution, with interbedded volcanic tuffs providing critical time markers. However, the resolution of existing Early Pleistocene–Pliocene ages is limited to c. 20–60 kyr, inhibiting the evaluation of climatic and environmental drivers of evolution. We present high-precision, single-feldspar 40 Ar/ 39 Ar age and elemental data for four stratigraphically significant tuffs. These s les exhibit variably dispersed age distributions correlated with feldspar compositional trends, interpreted to indicate the partial retention of inherited 40 Ar related to crustal ‘cold storage’ and rapid melt infiltration preceding eruption. We evaluated various statistical methods and calculated astronomically calibrated Bayesian age estimates of 1879.1 ± 0.6 ka (±2.4 ka including external errors) for the Kay Behrensmeyer Site (KBS)/H2 Tuff, 1837.4 ± 0.9 ka (±2.4 ka) for the Malbe/H4 Tuff, 1357.5 ± 1.8 ka (±2.5 ka) for the Chari/L Tuff and 1315.4 ± 1.9 ka (±2.5 ka) for the Gele Tuff. Our results permit refined age constraints for important early Homo fossils, including the cranium KNM-ER1813 ( Homo habilis ) and various Homo erectus fossils. The KBS Tuff age also provides an important calibration locus for orbital tuning of palaeoclimate proxy records, revealing the complex interplays between palaeoclimate and geological drivers of sedimentation. Supplementary material : The supplementary tables and figures include previously published ages (Table S1), s le and irradiation information (Table S2), electron probe microanalytical results for tuff glasses (Table S3, Figs S2 and S3) and feldspars (Table S4), 40 Ar/ 39 Ar analytical data (Tables S5 and S6, Fig. S4), orbital tuning model parameters (Table S7), a summary of previous and revised hominin ages (Table S8) and a worked Bayesian estimation ex le (Fig. S1) and are available at 0.6084/m9.figshare.c.6602994
Publisher: Informa UK Limited
Date: 04-2005
Publisher: Geological Society of America
Date: 2004
Publisher: American Geophysical Union (AGU)
Date: 12-2010
DOI: 10.1029/2009TC002621
Publisher: Springer Science and Business Media LLC
Date: 25-09-2011
DOI: 10.1038/NGEO1270
Publisher: Elsevier BV
Date: 04-2016
Publisher: American Geophysical Union (AGU)
Date: 09-2022
DOI: 10.1029/2022GC010424
Abstract: The modern western Pacific basins and arcs formed during the Cenozoic are considered to be underlain by Indian‐type asthenospheric mantle. Nevertheless, Mesozoic volcanic arcs are rare in the western Pacific, and as a result, the nature of the mantle source and subduction history in the western Pacific remains unclear. The Gagua Ridge constitutes the western boundary of the Philippine Sea Plate however, its geologic nature and genesis are unclear. Here, we determine whole‐rock major and trace elements and Sr‐Nd‐Pb‐Hf‐Mg isotopic compositions and emplacement ages of the volcanic rocks from the Gagua Ridge. These rocks are classified as trachy‐andesites and basaltic andesites. They are characterized by depletion in Nb‐Ta and enrichment in large ion lithosphile elements, confirming their arc affinity. 40 Ar‐ 39 Ar analyses of plagioclase yields ages of 124‐123 Ma for the basaltic andesite group and ∼115 Ma for the trachy‐andesite group. The elevated Zr‐Hf‐K of these rocks coupled with high Th/La ratios indicate melting of subducted sediments. The anomalously high Nb/Ta (mean ∼33) can be explained by slab melting with residual rutile. These rocks also show the highest δ 26 Mg (−0.14 to 0.4‰) for arc lavas ever reported and the δ 26 Mg values are coupled with rare earth element compositions, which can be explained by interaction of sediment melts with altered peridotite/altered oceanic crust in the subduction zone. These volcanic rocks have Nd‐Hf isotopes similar to the Pacific mantle, indicating the presence of Pacific‐type mantle in the Early Cretaceous western Pacific.
Publisher: Society of Economic Geologists
Date: 07-2002
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: Elsevier BV
Date: 2016
Publisher: Informa UK Limited
Date: 02-2005
Publisher: Springer Science and Business Media LLC
Date: 28-08-2012
Publisher: Elsevier BV
Date: 11-2009
Publisher: Informa UK Limited
Date: 06-2012
Publisher: Informa UK Limited
Date: 17-02-2016
Publisher: American Geophysical Union (AGU)
Date: 03-2017
DOI: 10.1002/2016GC006601
Publisher: Springer Science and Business Media LLC
Date: 05-09-2013
Publisher: Elsevier BV
Date: 03-1991
Publisher: Elsevier BV
Date: 11-2009
Publisher: Elsevier BV
Date: 03-2011
Publisher: Elsevier BV
Date: 11-2009
Publisher: Elsevier BV
Date: 2011
Publisher: Elsevier BV
Date: 08-2015
Publisher: Elsevier BV
Date: 08-2006
Publisher: Geological Society of America
Date: 2006
DOI: 10.1130/G22298.1
Publisher: Elsevier BV
Date: 11-2013
Publisher: Elsevier BV
Date: 12-2017
Publisher: Elsevier BV
Date: 08-2014
Publisher: Elsevier BV
Date: 04-2007
Publisher: Informa UK Limited
Date: 12-2005
Publisher: Oxford University Press (OUP)
Date: 11-03-2014
Publisher: Elsevier BV
Date: 10-2009
Publisher: American Geophysical Union (AGU)
Date: 04-2010
DOI: 10.1029/2009TC002487
Publisher: Elsevier BV
Date: 12-2014
Publisher: Cambridge University Press (CUP)
Date: 29-06-2007
DOI: 10.1017/S0954102007000478
Abstract: The Rauer Group, in Prydz Bay, contains reworked Archaean-Proterozoic crust in high-strain zones that formed during a pervasive high-temperature ductile deformation event related to intracratonic mechanisms. The effects of this event extend southwards from Prydz Bay into the southern Prince Charles Mountains. The associated structural evolution involved development of ductile and brittle structures that formed during an approximately north–south directed transpressional deformation event that is confined to high-grade ( °C) shear zones in the Rauer Group. Minerals from the Rauer Group, yield 40 Ar/ 39 Ar cooling ages ranging from 560 to 460 Ma. Thermal histories derived from hornblende, biotite and feldspar suggest that the onset of rapid cooling began sometime prior to 510 Ma with cooling rates of c . 42 to 33°C myr -1 from c . 510 Ma to c . 500 Ma. Whereas, 40 Ar/ 39 Ar data obtained from plagioclase and K–feldspar suggest a slower cooling from c . 500 Ma to c . 460 Ma with cooling rates from 5 to 2°C myr -1 . These results demonstrate that the early Palaeozoic cooling history and comparable palaeostress regimes are regionally extensive, which has important implications for the tectonothermal and stress-field variability across Gondwana. The elevated thermal conditions would induce lithospheric weakening and promote the early Palaeozoic intraplate orogeny observed in eastern Antarctica with the development of a large intracratonic shear system.
Publisher: Elsevier BV
Date: 2015
Publisher: Elsevier BV
Date: 03-2012
Publisher: Wiley
Date: 20-03-2013
DOI: 10.1111/BRE.12004
Publisher: Springer Science and Business Media LLC
Date: 15-08-2012
Publisher: Informa UK Limited
Date: 02-2005
Publisher: Elsevier BV
Date: 05-2006
Publisher: Elsevier BV
Date: 05-2006
Publisher: Elsevier BV
Date: 07-2005
Publisher: Wiley
Date: 29-12-2017
DOI: 10.1111/RGE.12118
Publisher: Elsevier BV
Date: 10-2009
Publisher: Elsevier BV
Date: 07-2005
Publisher: Elsevier BV
Date: 09-2004
Start Date: 2013
End Date: 12-2016
Amount: $370,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 03-2009
End Date: 03-2012
Amount: $195,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 11-2008
End Date: 03-2012
Amount: $410,000.00
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: 07-2018
End Date: 06-2023
Amount: $414,204.00
Funder: Australian Research Council
View Funded ActivityStart Date: 07-2007
End Date: 12-2011
Amount: $700,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 2014
End Date: 12-2018
Amount: $370,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 03-2008
End Date: 12-2011
Amount: $650,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 05-2021
End Date: 06-2023
Amount: $905,654.00
Funder: Australian Research Council
View Funded Activity