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dc.contributor.authorVerberne, Rick
dc.contributor.authorReddy, Steven
dc.contributor.authorSaxey, David
dc.contributor.authorFougerouse, Denis
dc.contributor.authorRickard, William
dc.contributor.authorPlavsa, D.
dc.contributor.authorAgangi, Andrea
dc.contributor.authorKylander-Clark, A.R.C.
dc.date.accessioned2020-12-10T07:28:50Z
dc.date.available2020-12-10T07:28:50Z
dc.date.issued2020
dc.identifier.citationVerberne, R. and Reddy, S.M. and Saxey, D.W. and Fougerouse, D. and Rickard, W.D.A. and Plavsa, D. and Agangi, A. et al. 2020. The geochemical and geochronological implications of nanoscale trace-element clusters in rutile. Geology. 48 (11): pp. 1126-1130.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/82054
dc.identifier.doi10.1130/G48017.1
dc.description.abstract

© 2020. All rights reserved. The geochemical analysis of trace elements in rutile (e.g., Pb, U, and Zr) is routinely used to extract information on the nature and timing of geological events. However, the mobility of trace elements can affect age and temperature determinations, with the controlling mecha-nisms for mobility still debated. To further this debate, we use laser-ablation-inductively coupled plasma-mass spectrometry and atom probe tomography to characterize the micro- to nanoscale distribution of trace elements in rutile sourced from the Capricorn orogen, Western Australia. At the >20 pm scale, there is no significant trace-element variation in single grains, and a concordant U-Pb crystallization age of 1872 ± 6 Ma (2a) shows no evidence of isotopic disturbance. At the nanoscale, clusters as much as 20 nm in size and enriched in trace ele-ments (Al, Cr, Pb, and V) are observed. The 207Pb/206Pb ratio of 0.176 ± 0.040 (2a) obtained from clusters indicates that they formed after crystallization, potentially during regional metamorphism. We interpret the clusters to have formed by the entrapment of mobile trace elements in transient sites of radiation damage during upper amphibolite facies metamor-phism. The entrapment would affect the activation energy for volume diffusion of elements present in the cluster. The low number and density of clusters provides constraints on the time over which clusters formed, indicating that peak metamorphic temperatures are short-lived, <10 m.y. events. Our results indicate that the use of trace elements to estimate volume diffusion in rutile is more complex than assuming a homogeneous medium.

dc.languageEnglish
dc.publisherGEOLOGICAL SOC AMER, INC
dc.subjectScience & Technology
dc.subjectPhysical Sciences
dc.subjectGeology
dc.subjectATOM-PROBE
dc.subjectMETAMORPHIC RUTILE
dc.subjectPB
dc.subjectZIRCON
dc.subjectTEMPERATURE
dc.subjectAGE
dc.subjectTIO2
dc.titleThe geochemical and geochronological implications of nanoscale trace-element clusters in rutile
dc.typeJournal Article
dcterms.source.volume48
dcterms.source.number11
dcterms.source.startPage1126
dcterms.source.endPage1130
dcterms.source.issn0091-7613
dcterms.source.titleGeology
dc.date.updated2020-12-10T07:28:50Z
curtin.note

Reproduced with permission from the publisher. The published paper may be accessed at: https://pubs.geoscienceworld.org/gsa/geology/article-abstract/48/11/1126/588198/The-geochemical-and-geochronological-implications?redirectedFrom=fulltext

curtin.departmentSchool of Earth and Planetary Sciences (EPS)
curtin.departmentJohn de Laeter Centre (JdLC)
curtin.departmentDepartment of Applied Geology
curtin.accessStatusOpen access
curtin.facultyFaculty of Science and Engineering
curtin.contributor.orcidSaxey, David [0000-0001-7433-946X]
curtin.contributor.orcidReddy, Steven [0000-0002-4726-5714]
curtin.contributor.orcidFougerouse, Denis [0000-0003-3346-1121]
curtin.contributor.orcidRickard, William [0000-0002-8118-730X]
curtin.contributor.orcidVerberne, Rick [0000-0002-5529-1250]
curtin.contributor.orcidAgangi, Andrea [0000-0001-6315-3918]
curtin.contributor.researcheridSaxey, David [H-5782-2014]
curtin.contributor.researcheridReddy, Steven [A-9149-2008]
curtin.contributor.researcheridRickard, William [E-9963-2013]
dcterms.source.eissn1943-2682
curtin.contributor.scopusauthoridSaxey, David [15059256300]
curtin.contributor.scopusauthoridReddy, Steven [7402263354]
curtin.contributor.scopusauthoridFougerouse, Denis [56418452200]
curtin.contributor.scopusauthoridRickard, William [35171231700]
curtin.contributor.scopusauthoridAgangi, Andrea [35785708100]


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