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Article: Precise 206Pb/238U age determination on zircons by laser ablation microprobe-inductively coupled plasma-mass spectrometry using continuous linear ablation

TitlePrecise 206Pb/238U age determination on zircons by laser ablation microprobe-inductively coupled plasma-mass spectrometry using continuous linear ablation
Authors
KeywordsLaser ablation microprobe-inductively plasma-mass spectrometry (LAM-ICP-MS)
U-pb and Pb-Pb dating
Zircon
Issue Date2001
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/chemgeo
Citation
Chemical Geology, 2001, v. 175 n. 3-4, p. 209-219 How to Cite?
AbstractLaser ablation microprobe-inductively plasma-mass spectrometry (LAM-ICP-MS) with a frequency quadrupled Nd-YAG UV laser (266 nm) has been used as a fast and relatively low cost technique to successfully determine the 207Pb/ 206Pb age of single zircon grains with ages older than 1000 Ma; however, it has a problem with serious fractionation in Pb/U during the ablation process of in-situ depth profile analysis. Alternatively, a linear-scan laser ablation technique was carried out in this study with an ablation size of 15-20 μm in width, 100-120 μm in length and 15-20 μm in depth on single zircon crystals. Constant focusing of the laser beam on the polished zircon crystal is maintained, which successfully minimized the fractionation in Pb/U during the ablation process. Using this method, typical precision of the measurement for 206Pb/ 238U ratios determined on single zircons is improved to 0.8-5%. Thus, the LAM-ICP-MS technique is capable not only of achieving precise 207Pb/ 206Pb ages at about the 1% level for > 1000 Ma zircons, but also of dating 206Pb/ 238U ages with precision of 2-5% for Mesozoic (156-126 Ma) zircons. It is likely that this simple and relatively low cost technique is able to achieve age results even comparable to the SHRIMP-type ion probe in the measurement of the relatively large (> 100 μm) and homogeneous zircons. However, it still has the disadvantage of lower spatial resolution, which limits its application to precise dating of small and/or heterogeneous zircons of Phanerozoic ages. © 2001 Elsevier Science B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/151057
ISSN
2015 Impact Factor: 3.482
2015 SCImago Journal Rankings: 2.346
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLi, Xen_HK
dc.contributor.authorLiang, XRen_HK
dc.contributor.authorSun, Men_HK
dc.contributor.authorGuan, Hen_HK
dc.contributor.authorMalpas, JGen_HK
dc.date.accessioned2012-06-26T06:16:37Z-
dc.date.available2012-06-26T06:16:37Z-
dc.date.issued2001en_HK
dc.identifier.citationChemical Geology, 2001, v. 175 n. 3-4, p. 209-219en_HK
dc.identifier.issn0009-2541en_HK
dc.identifier.urihttp://hdl.handle.net/10722/151057-
dc.description.abstractLaser ablation microprobe-inductively plasma-mass spectrometry (LAM-ICP-MS) with a frequency quadrupled Nd-YAG UV laser (266 nm) has been used as a fast and relatively low cost technique to successfully determine the 207Pb/ 206Pb age of single zircon grains with ages older than 1000 Ma; however, it has a problem with serious fractionation in Pb/U during the ablation process of in-situ depth profile analysis. Alternatively, a linear-scan laser ablation technique was carried out in this study with an ablation size of 15-20 μm in width, 100-120 μm in length and 15-20 μm in depth on single zircon crystals. Constant focusing of the laser beam on the polished zircon crystal is maintained, which successfully minimized the fractionation in Pb/U during the ablation process. Using this method, typical precision of the measurement for 206Pb/ 238U ratios determined on single zircons is improved to 0.8-5%. Thus, the LAM-ICP-MS technique is capable not only of achieving precise 207Pb/ 206Pb ages at about the 1% level for > 1000 Ma zircons, but also of dating 206Pb/ 238U ages with precision of 2-5% for Mesozoic (156-126 Ma) zircons. It is likely that this simple and relatively low cost technique is able to achieve age results even comparable to the SHRIMP-type ion probe in the measurement of the relatively large (> 100 μm) and homogeneous zircons. However, it still has the disadvantage of lower spatial resolution, which limits its application to precise dating of small and/or heterogeneous zircons of Phanerozoic ages. © 2001 Elsevier Science B.V. All rights reserved.en_HK
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/chemgeoen_HK
dc.relation.ispartofChemical Geologyen_HK
dc.rightsChemical Geology. Copyright © Elsevier BV.-
dc.subjectLaser ablation microprobe-inductively plasma-mass spectrometry (LAM-ICP-MS)en_HK
dc.subjectU-pb and Pb-Pb datingen_HK
dc.subjectZirconen_HK
dc.titlePrecise 206Pb/238U age determination on zircons by laser ablation microprobe-inductively coupled plasma-mass spectrometry using continuous linear ablationen_HK
dc.typeArticleen_HK
dc.identifier.emailSun, M: minsun@hku.hken_HK
dc.identifier.emailMalpas, JG: jgmalpas@hku.hken_HK
dc.identifier.authoritySun, M=rp00780en_HK
dc.identifier.authorityMalpas, JG=rp00059en_HK
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/S0009-2541(00)00394-6en_HK
dc.identifier.scopuseid_2-s2.0-0035009271en_HK
dc.identifier.hkuros57984-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0035009271&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume175en_HK
dc.identifier.issue3-4en_HK
dc.identifier.spage209en_HK
dc.identifier.epage219en_HK
dc.identifier.isiWOS:000168683800003-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridLi, XH=35229968100en_HK
dc.identifier.scopusauthoridLiang, XR=7401735389en_HK
dc.identifier.scopusauthoridSun, M=25932315800en_HK
dc.identifier.scopusauthoridGuan, H=36901914400en_HK
dc.identifier.scopusauthoridMalpas, JG=7006136845en_HK

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