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dc.contributor.authorCrowley, Quentinen
dc.contributor.authorChew, Daviden
dc.date.accessioned2014-06-03T09:41:02Z
dc.date.available2014-06-03T09:41:02Z
dc.date.issued2014en
dc.date.submitted2014en
dc.identifier.citationCrowley, QG, Heron, KY, Riggs, N, Kamber, B, Chew, D, McConnell, B, Benn, K, Chemical Abrasion Applied to LA-ICP-MS U-Pb Zircon Geochronology, Minerals, 4, 2014, 503-518en
dc.identifier.isbnhttp://10.0.13.62/min4020503
dc.identifier.otherYen
dc.identifier.urihttp://hdl.handle.net/2262/69561
dc.descriptionPUBLISHEDen
dc.description.abstractZircon (ZrSiO4) is the most commonly used mineral in U–Pb geochronology. Although it has proven to be a robust chronometer, it can suffer from Pb-loss or elevated common Pb, both of which impede precision and accuracy of age determinations. Chemical abrasion of zircon involves thermal annealing followed by relatively low temperature partial dissolution in HF acid. It was specifically developed to minimize or eliminate the effects of Pb-loss prior to analysis using Thermal Ionization Mass Spectrometry (TIMS). Here we test the application of chemical abrasion to Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) by analyzing zircons from both untreated and chemically abraded samples. Rates of ablation for high alpha-dose non-treated zircons are up to 25% faster than chemically abraded equivalents. Ablation of 91500 zircon reference material demonstrates a ca. 3% greater down-hole fractionation of 206Pb/238U for non-treated zircons. These disparities necessitate using chemical abrasion for both primary reference material and unknowns to avoid applying an incorrect laser induced fractionation correction. All treated samples display a marked increase in the degree of concordance and/or lowering of common Pb, thereby illustrating the effectiveness of chemical abrasion to LA-ICP-MS U–Pb zircon geochronology.en
dc.format.extent503-518en
dc.language.isoenen
dc.relation.ispartofseriesMineralsen
dc.relation.ispartofseries4en
dc.rightsYen
dc.subjectZirconen
dc.subjectGeochronologyen
dc.subjectLA-ICP-MSen
dc.titleChemical Abrasion Applied to LA-ICP-MS U-Pb Zircon Geochronologyen
dc.typeJournal Articleen
dc.type.supercollectionscholarly_publicationsen
dc.type.supercollectionrefereed_publicationsen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/crowleyqen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/chewden
dc.identifier.rssinternalid93828en
dc.identifier.doihttps://doi.org/10.3390/min4020503en
dc.rights.ecaccessrightsopenAccess
dc.subject.TCDThemeSmart & Sustainable Planeten
dc.subject.TCDTagEarth Scienceen
dc.identifier.rssurihttp://www.mdpi.com/2075-163X/4/2/503en
dc.identifier.orcid_id0000-0001-9254-6657en


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