A new appraisal of sri lankan bb zircon as a reference material for LA-ICP-MS U-Pb geochronology and Lu-Hf isotope tracing.

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dc.contributor.authorSantos, Maristella Moreira
dc.contributor.authorLana, Cristiano de Carvalho
dc.contributor.authorBuick, Ian S.
dc.contributor.authorSchmitz, Mark D.
dc.contributor.authorKamo, Sandra L.
dc.contributor.authorGerdes, Axel
dc.contributor.authorCorfu, Fernando
dc.contributor.authorTapster, Simon
dc.contributor.authorLancaster, Penelope
dc.contributor.authorStorey, Craig Darryl
dc.contributor.authorBasei, Miguel Ângelo Stipp
dc.contributor.authorTohver, Eric
dc.contributor.authorAlkmim, Ana Ramalho
dc.contributor.authorNalini Júnior, Hermínio Arias
dc.contributor.authorKrambrock, Klaus Wilhelm Heinrich
dc.contributor.authorLeite, Cristiano Fantini
dc.contributor.authorWiedenbeck, Michael
dc.date.accessioned2017-10-17T13:32:41Z
dc.date.available2017-10-17T13:32:41Z
dc.date.issued2017
dc.description.abstractA potential zircon reference material (BB zircon) for laser abla tion-in ductively coupled plasma-mass spectrometry (LA-ICP-M S)U-Pb geochronology and Hf isotope geochemistry is described. A batch of twenty zircon megacrysts (0.5–1.5 cm3) from SriLanka was studied. Within-grain rare earth element (REE) compositions are largely homogeneous, albeit with somevariation seen between fractured and homogeneous domains. Excluding fractured cathodoluminescence bright domains,the variation in U content for all analysed crystals ranged from 227 to 368 lgg-1and the average Th/U ratios werebetween 0.20 and 0.47. The Hf isotope composition (0.56–0.84 g/100 g Hf) is homogeneous within and between thegrains – mean176Hf/177Hf of 0.281674 ± 0.000018 (2s). The calculated alpha dose of 0.59 3 1018g-1for a numberof BB grains falls within the trend of previously studied, untreated zircon samples from Sri Lanka. Aliquots of the samecrystal (analysed by ID-TIMS in four different laboratories) gave consistent U-Pb ages with excellent measurementreproducibility (0.1–0.4% RSD). Interlaboratory assessment (by LA-ICP-MS) from individual crystals returned results that arewithin uncertainty equivalent to the TIMS ages. Finally, we report on within- and between-grain homogeneity of theoxygen isotope systematic of four BB crystals (13.16‰ VSMOW).pt_BR
dc.identifier.citationSANTOS, M. M. et al. A new appraisal of sri lankan bb zircon as a reference material for LA-ICP-MS U-Pb geochronology and Lu-Hf isotope tracing. Geostandards and Geoanalytical Research, v. 41, p. 335-358, 2017. Disponível em: <http://onlinelibrary.wiley.com/doi/10.1111/ggr.12167/abstract>. Acesso em: 25 ago. 2017.pt_BR
dc.identifier.doihttps://doi.org/10.1111/ggr.12167
dc.identifier.issn1751-908X
dc.identifier.urihttp://www.repositorio.ufop.br/handle/123456789/8946
dc.identifier.uri2http://onlinelibrary.wiley.com/doi/10.1111/ggr.12167/abstractpt_BR
dc.language.isoen_USpt_BR
dc.rightsrestritopt_BR
dc.subjectSri Lankan reference materialpt_BR
dc.subjectRare earth elementspt_BR
dc.titleA new appraisal of sri lankan bb zircon as a reference material for LA-ICP-MS U-Pb geochronology and Lu-Hf isotope tracing.pt_BR
dc.typeArtigo publicado em periodicopt_BR
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