ORCID Profile
0000-0003-0496-0028
Current Organisation
University of Melbourne
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Geology | Geochronology | Geochronology | Geotectonics | Geochronology And Isotope Geochemistry | Archaeological Science | Geochemistry | Geomorphology | Surface Processes | Isotope Geochemistry | Tectonics | Archaeology | Earth Sciences Not Elsewhere Classified | Aboriginal and Torres Strait Islander Archaeology | Exploration Geochemistry | Igneous and Metamorphic Petrology | Extraterrestrial Geology | Geology Not Elsewhere Classified | Conservation And Biodiversity | Geochemistry not elsewhere classified | Simulation And Modelling | Environmental Science and Management | Optimisation | Global Change Biology | Geomorphology and Regolith and Landscape Evolution | Archaeological Science | Climatology (Incl. Palaeoclimatology) | Other Earth Sciences | Mathematical Sciences Not Elsewhere Classified | Environmental Sciences Not Elsewhere Classified | Volcanology |
Earth sciences | Expanding Knowledge in the Earth Sciences | Expanding Knowledge in History and Archaeology | Oil and gas | Living resources (flora and fauna) | Integrated (ecosystem) assessment and management | Mineral Exploration not elsewhere classified | Environmental and resource evaluation not elsewhere classified | Mathematical sciences | Climate variability | Climate change | Oil and gas | Understanding Australia's Past | Conserving Collections and Movable Cultural Heritage | Conserving Aboriginal and Torres Strait Islander Heritage | Scientific instrumentation | Oil and Gas Exploration | Exploration | Expanding Knowledge in Engineering | Other
Publisher: Copernicus GmbH
Date: 14-01-2021
Publisher: American Geophysical Union (AGU)
Date: 12-2006
DOI: 10.1029/2006TC001985
Publisher: Elsevier BV
Date: 03-1987
Publisher: Wiley
Date: 08-2012
Publisher: Elsevier BV
Date: 11-2020
Publisher: Elsevier BV
Date: 06-2006
Publisher: Springer Science and Business Media LLC
Date: 22-02-2021
Publisher: Informa UK Limited
Date: 08-2008
Publisher: Geological Society of America
Date: 09-2013
DOI: 10.1130/G33617C.1
Publisher: Springer Science and Business Media LLC
Date: 10-1976
DOI: 10.1038/263738A0
Publisher: Informa UK Limited
Date: 08-2008
Publisher: American Geophysical Union (AGU)
Date: 10-2017
DOI: 10.1002/2017TC004703
Publisher: Copernicus GmbH
Date: 28-03-2022
DOI: 10.5194/EGUSPHERE-EGU22-13429
Abstract: & & Over the last two years, the Australian AuScope Geochemistry Network (AGN) has developed AusGeochem in collaboration with geoscience-data-solutions company Lithodat Pty Ltd. This open, cloud-based data platform (ausgeochem.auscope.org.au) serves as a geo-s le registry, with IGSN minting capability, a geochemical data repository and a data analysis tool. With guidance from experts in the field of geochemistry from a number of Australian institutions, and following international standards and best practices, various s le and geochemistry data models were developed that align with the FAIR data principles. AusGeochem is currently accepting data of SIMS U-Pb as well as of fission track and (U-Th-Sm)/He techniques with LA-ICPS-MS U-Pb and Lu-Hf, & sup& & /sup& Ar/& sup& & /sup& Ar data models under development. Special attention is paid to the implementation of streamlined workflows for AGN laboratories to facilitate ease of data upload from analytical sessions. Analytical results can then be shared with users through AusGeochem and where required can be kept fully confidential and under embargo for specified periods of time. Once the analytical data on in idual s les are finalized, the data can then be made more widely accessible, and where required can be combined into specific datasets that support publications.& &
Publisher: Wiley
Date: 16-12-2019
DOI: 10.1111/TER.12441
Publisher: Elsevier BV
Date: 07-2015
Publisher: Elsevier BV
Date: 10-1993
Publisher: American Geophysical Union (AGU)
Date: 06-2013
DOI: 10.1002/TECT.20043
Publisher: Elsevier BV
Date: 05-2005
Publisher: Copernicus GmbH
Date: 28-09-2020
Abstract: Abstract. A series of isochronal heating experiments were performed to constrain monazite fission-track thermal annealing properties. 252Cf fission-tracks were implanted into monazite crystals from the Devonian Harcourt Granodiorite (Victoria, Australia) on polished surfaces oriented parallel and perpendicular to (100) prismatic faces. Tracks were annealed over 1, 10, 100 and 1000 hour schedules at temperatures between 30 °C and 400 °C. Track lengths were measured on captured digital image stacks, and then converted to calculated mean lengths of equivalent confined fission tracks which progressively decreased with increasing temperature and time. Annealing is anisotropic, with tracks on surfaces perpendicular to the crystallographic c-axis consistently annealing faster than those on surfaces parallel to c. To investigate how the mean track lengths decreased as a function of annealing time and temperature, one parallel and two fanning models were fitted to the empirical dataset. The temperature limits of the monazite partial annealing zone (MPAZ) were defined as length reductions to 0.95 (lowest) and 0.5 (highest) for this study. Extrapolation of the laboratory experiments to geological timescales indicates that for a heating duration of 107 years, estimated temperature ranges of the MPAZ are −44 to 101 °C for the parallel model and −71 to 143 °C (both ~ 6–21 °C, 2 standard errors) for the best fitting linear fanning model (T0 = ∞). If a monazite fission-track closure temperature is approximated as the mid-point of the MPAZ, these results, for tracks with similar mass and energy distributions to those involved in spontaneous fission of 238U, are consistent with previously estimated closure temperatures (calculated from substantially higher energy particles) of
Publisher: Informa UK Limited
Date: 12-1995
Publisher: Elsevier BV
Date: 07-2006
Publisher: American Geophysical Union (AGU)
Date: 2014
DOI: 10.1002/2013JB010429
Publisher: Elsevier BV
Date: 1984
Publisher: Elsevier BV
Date: 10-2012
Publisher: American Geophysical Union (AGU)
Date: 04-2022
DOI: 10.1029/2021JB023850
Abstract: Mesozoic‐Cenozoic subduction of the Farallon slab beneath North America generated a regionally extensive orogenic plateau in the southwestern US during the latest Cretaceous, similar to the modern Central Andean Plateau. In Nevada and southern Arizona, estimates from whole‐rock geochemistry suggest crustal thicknesses reached ∼60–55 km by the Late Cretaceous. Modern crustal thicknesses are ∼28 km, requiring significant Cenozoic crustal thinning. Here, we compare detailed low‐temperature thermochronology from the Catalina metamorphic core complex (MCC) to whole rock Sr/Y crustal thickness estimates across southern Arizona. We identify three periods of cooling. A minor cooling phase occurred prior to ∼40 Ma with limited evidence of denudation and ∼10 km of crustal thinning. Major cooling occurred during detachment faulting and MCC formation at 26–19 Ma, corresponding to ∼8 km of denudation and ∼8 km of crustal thinning. Finally, we document a cooling phase at 17–11 Ma related to Basin and Range extension that corresponds with ∼5 km of denudation and ∼9 km of crustal thinning. During the MCC and Basin and Range extension events, the amount of denudation recorded by low‐temperature thermochronology can be explained by corresponding decreases in the crustal thickness. However, the relatively limited exhumation prior to detachment faulting at ∼26 Ma recorded by thermochronology is insufficient to explain the magnitude of crustal thinning (∼10 km) observed in the whole rock crustal thickness record. Therefore, we suggest that crustal thinning of the Arizona‐plano was facilitated via ductile mid‐ to lower‐crustal flow, and limited upper‐crustal extension at 50–30 Ma prior to detachment faulting and Basin and Range extension.
Publisher: American Geophysical Union (AGU)
Date: 12-01-2015
DOI: 10.1002/2014GL062383
Publisher: Elsevier BV
Date: 06-1986
Publisher: Elsevier BV
Date: 05-1974
Publisher: Elsevier BV
Date: 07-2016
Publisher: Elsevier BV
Date: 11-2013
Publisher: Elsevier BV
Date: 1974
Publisher: Informa UK Limited
Date: 12-1977
Publisher: Informa UK Limited
Date: 10-1984
Publisher: Elsevier BV
Date: 07-2009
Publisher: Elsevier BV
Date: 07-2009
Publisher: Elsevier BV
Date: 11-2015
Publisher: Informa UK Limited
Date: 07-1983
Publisher: Geological Society of America
Date: 2004
DOI: 10.1130/G20936.1
Publisher: Geological Society of America
Date: 2007
DOI: 10.1130/G23108A.1
Publisher: Elsevier BV
Date: 1990
Publisher: Elsevier BV
Date: 12-1976
Publisher: Geological Society of London
Date: 2009
DOI: 10.1144/SP324.15
Publisher: Springer Science and Business Media LLC
Date: 03-1980
DOI: 10.1038/284225A0
Publisher: Elsevier BV
Date: 10-2003
Publisher: Wiley
Date: 19-03-2019
DOI: 10.1111/TER.12382
Publisher: American Geophysical Union (AGU)
Date: 02-2014
DOI: 10.1002/2013GC004951
Publisher: Springer Science and Business Media LLC
Date: 11-1985
DOI: 10.1007/BF00413354
Publisher: Elsevier BV
Date: 05-2011
Publisher: Elsevier BV
Date: 06-1982
Publisher: Elsevier BV
Date: 04-2013
Publisher: Elsevier BV
Date: 26-08-0015
Publisher: Elsevier BV
Date: 08-1989
Publisher: Elsevier BV
Date: 06-1981
Publisher: Informa UK Limited
Date: 02-04-2016
Publisher: Springer Science and Business Media LLC
Date: 12-1986
DOI: 10.1007/BF00376334
Publisher: Elsevier BV
Date: 12-1986
Publisher: Mineralogical Society of America
Date: 06-2022
DOI: 10.2138/AM-2022-8002
Abstract: A series of experiments on monazites from Victoria, Australia, is presented to further understand their fission track etching properties. Using a 6 M HCl etchant at 90 °C, SEM images on crystal (100) pinacoid faces reveal well-etched rhombic spontaneous fission track openings. Average rhombic etch pit diameters Dpc and Dpb, parallel to the crystallographic c- and b-axes are 0.81 ± 0.20 µm and 0.73 ± 0.26 µm, respectively. An angular distribution experiment on (100) faces found that spontaneous fission tracks initially etch anisotropically, being preferentially revealed at an azimuth of 90° to the crystallographic c-axis up to ~60 min of etching. As etching continues, however, the distribution becomes progressively more uniform and is essentially isotropic by 90 min. Two experimental methods determined the rate at which the etchant penetrated along the lengths of implanted 252Cf fission tracks. This involved the application of a focused ion beam scanning electron microscope (FIB-SEM) to mill progressively into slightly etched monazite crystals followed by an etch-anneal-etch approach. Results indicate that at least the greater part of the etchable ranges of the latent fission tracks were penetrated by the 6 M HCl etchant within the first few minutes. Continued etching to 5 min indicates that track etching slows down toward the ends of the tracks, but the maximum ranges are estimated to be reached after 5–15 min, which represents the longest time the latent segments of the tracks are exposed to potential annealing at the etchant temperature. Taking into account that implanted 252Cf fission tracks in monazite anneal on average ~4% of their length at 90 °C after 1 h (Jones et al. 2019), suggests that a much shorter duration for exposure to this temperature causes less than ~1% of fission track length reduction during etching.
Publisher: Geological Society of America
Date: 05-2006
DOI: 10.1130/B25736.1
Publisher: Informa UK Limited
Date: 04-1999
Publisher: Elsevier BV
Date: 08-2015
Publisher: Mineralogical Society of America
Date: 2005
Publisher: Mineralogical Society of America
Date: 2005
Publisher: Springer Science and Business Media LLC
Date: 06-1983
DOI: 10.1007/BF01031296
Publisher: American Association for the Advancement of Science (AAAS)
Date: 13-08-2021
Abstract: Radiocarbon dating of layered rocks may provide new insight into past climates and human activity in Australia’s Kimberley region.
Publisher: Copernicus GmbH
Date: 30-11-2020
Publisher: Informa UK Limited
Date: 1979
Publisher: Elsevier BV
Date: 1990
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4JA00008K
Abstract: This papers describes the source of systematic bias in U–Pb zircon dating by LA-ICP-MS.
Publisher: American Geophysical Union (AGU)
Date: 08-2022
DOI: 10.1029/2022GC010390
Abstract: Northern Malawi's Nyika Plateau is a 3,700 km 2 large, highly elevated (∼2,500 m) plateau located at the western margin of the Miocene‐Recent Malawi rift and the confluence of multiple Proterozoic orogenic belts. Neighboring asthenospheric upwelling in the Rungwe Volcanic Province, associated with the active East African Rift, has created similar topographic highs, leading some to speculate that the formation of Nyika could be related. Here, we present new low‐temperature data using apatite fission track, apatite (U‐Th‐Sm)/He and zircon (U‐Th)/He thermochronology to constrain the upper crustal thermal history of the Nyika region since the Devonian. The data suggest that Nyika was an isolated feature since at least the Permo‐Triassic, well before more recent rifting in Malawi, and may have developed as a horst between two large Karoo grabens, the Henga‐Ruhuhu and the North Rukuru to the southeast and northwest, respectively. Similarities between the thermal histories of Nyika and the currently separated Livingstone Plateau to the east allow for the possibility that these may have been connected in a contiguous highland prior to the formation of the intervening Neogene Malawi rift. Thermal history models for exposed Precambrian basement s les adjacent to Nyika, and once buried beneath the neighboring Karoo basins, indicate that up to 3.4 km of Permo‐Triassic section has since been eroded, with s les along the plateau not indicating burial of Karoo‐type sediment at this time. Most recent cooling histories suggest that the plateau surface continued to denude at varying degrees from the Cretaceous and reached near‐surface temperatures in the Late Paleogene‐Neogene.
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: Copernicus GmbH
Date: 04-03-2021
DOI: 10.5194/EGUSPHERE-EGU21-14628
Abstract: & & The AuScope Geochemistry Network (AGN, www.auscope.org.au/agn) was established in 2019 in response to a community expressed desire for closer collaboration and coordination of activities between Australian geochemistry laboratories. Its aims include: i) promotion of capital and operational investments in new, advanced geochemical infrastructure (ii) supporting increased end user access to laboratory facilities and research data (iii) fostering collaboration and professional development via online tools, training courses and workshops. Over the last six months, the AGN has coordinated a monthly webinar series to engage the geoscience community, promote FAIR data practices and foster new collaborations. These webinars were recorded for future use and can be found at: hannel/UC0zzzc6_mrJEEdCS_G4HYgg.& & & & A primary goal of the AGN is to make the networks& #8217 laboratory geochemistry data, from around the globe, discoverable and accessible via development of an online data platform called AusGeochem (www.auscope.org.au/ausgeochem). Geochemical data models for SHRIMP U-Pb, Fission Track, U-Th/He, LA-ICP-MS U-Pb/Lu-Hf and Ar-Ar are being developed using international best practice and are informed by expert advisory groups consisting of members from various institutes and laboratories within Australia. AusGeochem is being designed to provide an online data service for analytical laboratories and researchers where s le and analytical data can be uploaded (privately) for processing, synthesis and secure dissemination to collaborators. Researcher data can be retained in a private space but studied within the context of other publicly available data. Researchers can also generate unique international geo s le numbers (IGSNs) for their s les via a build in link to the Australian Research Data Commons IGSN registry.& & & & & AusGeochem supports FAIR data practices by providing researchers with the ability to include links to their AusGeochem registered data in research publications, providing a potential opportunity for AusGeochem to become a trusted data repository.& &
Publisher: Elsevier BV
Date: 06-1981
Publisher: Springer Science and Business Media LLC
Date: 03-1980
DOI: 10.1038/284230A0
Publisher: Elsevier BV
Date: 1987
Publisher: Elsevier BV
Date: 1985
Publisher: American Geophysical Union (AGU)
Date: 2018
DOI: 10.1002/2017TC004575
Publisher: Elsevier BV
Date: 09-2013
Publisher: Wiley
Date: 11-09-2021
Publisher: Wiley
Date: 06-09-2021
Publisher: Wiley
Date: 07-09-2021
DOI: 10.1002/GEA.21882
Abstract: Distinctive, dark‐coloured, glaze‐like mineral accretions are common on low‐angle surfaces in sandstone rock shelters in the Kimberley region of north‐western Australia, where they provide an attractive medium for the production of deep engravings, and occasionally, are associated with painted rock art. These accretions form within the shelter dripline and are similar to those reported from other sites around the world, where they have been used for radiocarbon dating of associated rock art. This study uses extensive field observations and mineralogical analysis of 77 such oxalate‐rich accretions collected at 41 different sites across a wide area of the north Kimberley region. The mineralogy of these accretions is dominated by well‐crystallised calcium oxalate and sulphate minerals, most commonly whewellite and gypsum, with significant occurrences of phosphates in some s les. The accretions are typically several millimetres thick and characterised by distinctive internal laminations that show regular stacked undulations, giving a stromatolitic appearance under the microscope. Together with other apparently microbial features observed under the scanning electron microscope, these features provide strong support for a microbiological origin for these oxalate‐rich accretions. The well‐crystallised nature of the oxalates and the preservation of fine laminar features within the accretions supports their use for radiocarbon dating.
Publisher: Elsevier BV
Date: 09-1988
Publisher: Informa UK Limited
Date: 08-2002
Publisher: Informa UK Limited
Date: 12-1989
Publisher: Elsevier BV
Date: 04-2019
Publisher: American Geophysical Union (AGU)
Date: 06-2005
DOI: 10.1029/2004TC001688
Publisher: Elsevier BV
Date: 06-2010
Publisher: Wiley
Date: 06-1994
DOI: 10.1111/J.1365-2117.1994.TB00077.X
Abstract: Backstripping and apatite fission track analysis are used to constrain the Mesozoic vertical motion of the eastern Australian basins (Eromanga, Surat and Clarence‐Moreton). The backstripping results show that subsidence was linear during the Jurassic, and the rate of subsidence shows an overall increase (by a factor of about 2) towards the eastern margin. The Cretaceous section is well preserved only in the Eromanga Basin, and the backstripping results show that the apparent subsidence rate increased by a factor of 5–10 during the Early Cretaceous. The sediments show a lithological cyclicity which is the result of a variable influx of volcanogenic detritus from the convergent eastern margin. The rapid Cretaceous subsidence corresponds to a large influx of this volcanogenic material, resulting in progressively non‐marine deposition at a time when global sea‐level was rising. The apatite fission track data suggest that the Cretaceous section was probably deposited over the Surat and Clarence‐Moreton Basins but has since been eroded off. The exhumation‐induced cooling may have commenced earlier in the eastern region (Late Cretaceous to Early Tertiary) and slightly later to the west (Early to Middle Tertiary). Furthermore, the inferred total amount of removed section is greater (˜2.5 km) in the east than in the west ( km). The present‐day thermal regime in the Eromanga Basin is considered to be a relatively recent ( Ma) phenomenon, as non‐zero fission track ages are maintained in sediments currently at temperatures of ˜120°C. Overall, the regional backstripping and apatite fission track results support a model of platform tilting, This is related to the inferred subduction along a convergent margin on eastern Australia during the Jurassic to Early Cretaceous. The cessation of subduction, and subsequent opening of the Tasman Sea in the Late Cretaceous, was accompanied by uplift on the eastern margin and the termination of widespread deposition on the platform.
Publisher: Elsevier BV
Date: 10-2004
Publisher: Elsevier BV
Date: 03-2012
Publisher: Informa UK Limited
Date: 04-1999
Publisher: Copernicus GmbH
Date: 14-01-2021
Publisher: Copernicus GmbH
Date: 13-12-2019
Publisher: Elsevier BV
Date: 1989
Publisher: Elsevier BV
Date: 06-1986
Publisher: Elsevier BV
Date: 09-2007
Publisher: American Geophysical Union (AGU)
Date: 26-05-2011
DOI: 10.1029/2009TC002649
Publisher: Copernicus GmbH
Date: 28-03-2022
DOI: 10.5194/EGUSPHERE-EGU22-12874
Abstract: & & One of the greatest challenges in the global geochemistry community is to aggregate and make the large amounts of geochemical data generated by laboratories FAIR [Findable, Accessible, Interoperable, and Reusable] and publicly available the large amounts of data generated in laboratories. Standardisation and data organisation has often been an in idual or voluntary/uncoordinated effort and/or motivated by the likelihood of immediate/near-future publication. Along with the technical challenges of getting laboratory data into a well-structured relational database and linked to s les& #8217 metadata, societal and cultural issues are often present around the standardisation and accessibility of data reporting (e.g. equipment manufacturer, funding body proprietary data outputs, data reduction software accessibility and requirements/& #8220 data ownership& #8221 of the users/scientists).& & & & & & & & & In response to a national expression of a need to address the challenges outlined above and for better organisation and coordination of Australian geochemistry laboratories and data, AuScope funded the AuScope Geochemistry Network (AGN) in 2019. The AGN comprises a team of researchers, data-scientists, and technical staff from three universities across Australia Curtin University, the University of Melbourne, and Macquarie University, tasked in coordinating and strategizing the best approach to:& & & ul& & li& Unite the erse Australian geochemistry community.& /li& & li& Promote national capability (existing geochemical capability).& /li& & li& Promote investment in infrastructure (new, advanced geochemical infrastructure).& /li& & li& Support increased end user access to laboratory facilities.& /li& & li& Support professional development via online tools, training courses and workshops.& /li& & li& Preserving legacy data sets& /li& & /ul& & & & & & & & Over the last two years the AGN has worked to organise the geochemistry community and provide solutions to the integration and adoption of international best practices for data management. With the & #8216 end in mind& #8217 the AGN and collaborator Lithodat have developed the AusGeochem platform, a unique research data platform that services laboratory needs, bridges the gap between s le metadata and analytical data as well as strengthens the user-laboratory connection. To establish data reporting tables that fit the community& #8217 s need, yet facilitate FAIR data practices and integrating international best practices for handling geochemistry data, the AGN led and coordinated Expert Advisory Groups composed of geochemical specialists from a number of Australian institutions. Along with the AusGeochem platform that allows laboratories to upload, archive, disseminate and publish their datasets the AGN has built LabFinder, a web application tool that helps geoscience users find and access the right laboratory and analytical technique to solve their research questions. LabFinder aims to continue to support end user access to laboratory facilities leading to the improvement in the capability and capacity of geochemistry laboratories on a national scale. In the coming two years AGN will continue to build upon these accomplishments by expanding the AGN data partnerships through the on boarding of institutions hosting major geochemistry laboratories, further facilitating collaborations between Australian geochemistry laboratories.& &
Publisher: Elsevier BV
Date: 06-1977
Publisher: Elsevier BV
Date: 1977
Publisher: Elsevier BV
Date: 1990
Publisher: Elsevier BV
Date: 09-1979
Publisher: Springer Science and Business Media LLC
Date: 1974
DOI: 10.1007/BF00371133
Publisher: Elsevier BV
Date: 1978
Publisher: American Geophysical Union (AGU)
Date: 02-2018
DOI: 10.1002/2017JB015049
Publisher: Informa UK Limited
Date: 1979
Publisher: Elsevier BV
Date: 05-2002
Publisher: Elsevier BV
Date: 07-2009
Publisher: Geological Society of London
Date: 2009
DOI: 10.1144/SP324.2
Publisher: Informa UK Limited
Date: 09-1978
Publisher: Informa UK Limited
Date: 06-1987
Publisher: Informa UK Limited
Date: 02-1994
Publisher: Copernicus GmbH
Date: 16-02-2021
Abstract: Abstract. A series of isochronal heating experiments were performed to constrain monazite fission track thermal annealing properties. The 252Cf fission tracks were implanted into monazite crystals from the Devonian Harcourt granodiorite (Victoria, Australia) on polished surfaces oriented parallel to (100) pinacoidal faces and perpendicular to the crystallographic c axis. Tracks were annealed over 1, 10, 100 and 1000 h schedules at temperatures between 30 and 400 ∘C. Track lengths were measured on captured digital image stacks and then converted to calculated mean lengths of equivalent confined fission tracks that progressively decreased with increasing temperature and time. Annealing is anisotropic, with tracks on surfaces perpendicular to the crystallographic c axis consistently annealing faster than those parallel to the (100) face. To investigate how the mean track lengths decreased as a function of annealing time and temperature, one parallel and two fanning models were fitted to the empirical dataset. The temperature limits of the monazite partial annealing zone (MPAZ) were defined as length reductions to 0.95 (lowest) and 0.5 (highest) for this study. Extrapolation of the laboratory experiments to geological timescales indicates that for a heating duration of 107 years, estimated temperature ranges of the MPAZ are −44 to 101 ∘C for the parallel model and −71 to 143 ∘C (both ±6–21 ∘C, 2 standard errors) for the best-fitting linear fanning model (T0=∞). If a monazite fission track closure temperature is approximated as the midpoint of the MPAZ, these results, for tracks with similar mass and energy distributions to those involved in spontaneous fission of 238U, are consistent with previously estimated closure temperatures (calculated from substantially higher energy particles) of 50 ∘C and perhaps not much higher than ambient surface temperatures. Based on our findings we estimate that this closure temperature (Tc) for fission tracks in monazite ranges between ∼ 45 and 25 ∘C over geological timescales of 106–107 years, making this system potentially useful as an ultra-low-temperature thermochronometer.
Publisher: American Geophysical Union (AGU)
Date: 03-2019
DOI: 10.1029/2018TC005210
Publisher: Elsevier BV
Date: 1978
Publisher: Wiley
Date: 20-03-2013
DOI: 10.1111/BRE.12004
Publisher: Elsevier BV
Date: 10-1974
Publisher: Elsevier BV
Date: 12-2014
Publisher: Springer Science and Business Media LLC
Date: 11-1979
DOI: 10.1007/BF00371880
Publisher: American Association for the Advancement of Science (AAAS)
Date: 07-02-2020
Abstract: Radiocarbon-dated mud wasp nests provide a terminal Pleistocene age estimate for an Australian Aboriginal rock art style.
Publisher: Elsevier BV
Date: 09-1989
Publisher: Informa UK Limited
Date: 03-2900
Publisher: Elsevier BV
Date: 06-1978
Publisher: Elsevier BV
Date: 09-1992
Start Date: 2006
End Date: 2008
Funder: Australian Research Council
View Funded ActivityStart Date: 2003
End Date: 2004
Funder: Australian Research Council
View Funded ActivityStart Date: 2007
End Date: 2007
Funder: Australian Research Council
View Funded ActivityStart Date: 2002
End Date: 2006
Funder: Australian Research Council
View Funded ActivityStart Date: 2021
End Date: 2021
Funder: Australian Research Council
View Funded ActivityStart Date: 2004
End Date: 2007
Funder: Australian Research Council
View Funded ActivityStart Date: 2005
End Date: 2007
Funder: Australian Research Council
View Funded ActivityStart Date: 2015
End Date: 2015
Funder: Australian Research Council
View Funded ActivityStart Date: 2015
End Date: 2018
Funder: Australian Research Council
View Funded ActivityStart Date: 2013
End Date: 2017
Funder: Australian Research Council
View Funded ActivityStart Date: 2016
End Date: 2021
Funder: Australian Research Council
View Funded ActivityStart Date: 2018
End Date: 2020
Funder: Australian Research Council
View Funded ActivityStart Date: 2010
End Date: 2013
Funder: Australian Research Council
View Funded ActivityStart Date: 2018
End Date: 2021
Funder: Australian Research Council
View Funded ActivityStart Date: 2013
End Date: 2016
Funder: Australian Research Council
View Funded ActivityStart Date: 2003
End Date: 2006
Funder: Australian Research Council
View Funded ActivityStart Date: 2002
End Date: 2003
Funder: Australian Research Council
View Funded ActivityStart Date: 2008
End Date: 2008
Funder: Australian Research Council
View Funded ActivityStart Date: 2009
End Date: 2009
Funder: Australian Research Council
View Funded ActivityStart Date: 2006
End Date: 12-2008
Amount: $303,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 2003
End Date: 12-2006
Amount: $275,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 2005
End Date: 12-2007
Amount: $270,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 2013
End Date: 12-2017
Amount: $420,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 2010
End Date: 12-2013
Amount: $310,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 2002
End Date: 12-2003
Amount: $190,000.00
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: 2002
End Date: 12-2006
Amount: $525,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 2015
End Date: 12-2018
Amount: $970,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 05-2016
End Date: 12-2021
Amount: $865,905.00
Funder: Australian Research Council
View Funded ActivityStart Date: 06-2014
End Date: 09-2017
Amount: $480,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 2004
End Date: 12-2004
Amount: $40,000.00
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: 2015
End Date: 12-2015
Amount: $170,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 02-2004
End Date: 12-2007
Amount: $255,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 2009
End Date: 06-2010
Amount: $950,000.00
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: 04-2018
End Date: 04-2024
Amount: $880,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 12-2003
End Date: 12-2004
Amount: $10,000.00
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