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dc.contributor.authorJoseph, C.
dc.contributor.authorFougerouse, Denis
dc.contributor.authorSaxey, David
dc.contributor.authorVerberne, R.
dc.contributor.authorReddy, Steven
dc.contributor.authorRickard, William
dc.date.accessioned2023-04-20T07:43:43Z
dc.date.available2023-04-20T07:43:43Z
dc.date.issued2021
dc.identifier.citationJoseph, C. and Fougerouse, D. and Saxey, D.W. and Verberne, R. and Reddy, S.M. and Rickard, W.D.A. 2021. Xenotime at the Nanoscale: U-Pb Geochronology and Optimisation of Analyses by Atom Probe Tomography. Geostandards and Geoanalytical Research. 45 (3): pp. 443-456.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/91630
dc.identifier.doi10.1111/ggr.12398
dc.description.abstract

Xenotime (YPO4) is an accessory phase common in low to high-temperature geological environments. Xenotime is an established geochronometer, though its small size, low modal abundance and textural complexity make it more difficult to analyse with traditional techniques but makes a prime candidate for nanoscale analysis. In this study, we develop an atom probe tomography (APT) protocol to determine the 206Pb/238U and 207Pb/206Pb ages of micro-scale xenotime crystals with analytical volumes four to six orders of magnitude smaller than typical geochronology techniques. A linear correlation between the 206Pb/238U fractionation and 238UO22+/238UO2+ was used to correct for the atom probe instrument parameters variability between specimens. For 207Pb/206Pb ages, we employed two methods of background correction owing to the 206Pb2+ thermal tail contribution to the 207Pb2+ counts: A constant background correction for the younger (˜ 1000 Ma) Y1 reference material and a variable correction of background for Archaean age reference material xtc to correct for the thermal tail influence. This contribution also proposes strategies for optimisation of xenotime analysis using APT and permits us to explore the various geological problems in the nanoscale realm. This methodology potentially allows determining the age of small xenotime crystals in sedimentary rocks, low metamorphic grade settings and deformation microstructures.

dc.languageEnglish
dc.publisherWILEY
dc.relation.sponsoredbyhttp://purl.org/au-research/grants/arc/DE190101307
dc.subjectScience & Technology
dc.subjectPhysical Sciences
dc.subjectGeochemistry & Geophysics
dc.subjectatom probe tomography
dc.subjectAPT
dc.subjectnanogeochronology
dc.subjectPb-206/U-238
dc.subjectPb-207/Pb-206
dc.subjectradiometric dating
dc.subjectAUTHIGENIC XENOTIME
dc.subjectDIAGENETIC XENOTIME
dc.subjectSEDIMENTARY-ROCKS
dc.subjectFLUID-FLOW
dc.subjectMONAZITE
dc.subjectZIRCON
dc.subjectAUSTRALIA
dc.subjectDEPOSIT
dc.subjectAGES
dc.subjectMASS
dc.titleXenotime at the Nanoscale: U-Pb Geochronology and Optimisation of Analyses by Atom Probe Tomography
dc.typeJournal Article
dcterms.source.volume45
dcterms.source.number3
dcterms.source.startPage443
dcterms.source.endPage456
dcterms.source.issn1639-4488
dcterms.source.titleGeostandards and Geoanalytical Research
dc.date.updated2023-04-20T07:43:42Z
curtin.departmentSchool of Earth and Planetary Sciences (EPS)
curtin.departmentJohn de Laeter Centre (JdLC)
curtin.accessStatusFulltext not available
curtin.facultyFaculty of Science and Engineering
curtin.contributor.orcidSaxey, David [0000-0001-7433-946X]
curtin.contributor.orcidFougerouse, Denis [0000-0003-3346-1121]
curtin.contributor.orcidReddy, Steven [0000-0002-4726-5714]
curtin.contributor.orcidRickard, William [0000-0002-8118-730X]
curtin.contributor.researcheridSaxey, David [H-5782-2014]
curtin.contributor.researcheridReddy, Steven [A-9149-2008]
curtin.contributor.researcheridRickard, William [E-9963-2013]
dcterms.source.eissn1751-908X
curtin.contributor.scopusauthoridSaxey, David [15059256300]
curtin.contributor.scopusauthoridFougerouse, Denis [56418452200]
curtin.contributor.scopusauthoridReddy, Steven [7402263354]
curtin.contributor.scopusauthoridRickard, William [35171231700]
curtin.repositoryagreementV3


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