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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Autor(es): dc.creatorSantos, Maristella Moreira-
Autor(es): dc.creatorLana, Cristiano de Carvalho-
Autor(es): dc.creatorBuick, Ian S.-
Autor(es): dc.creatorSchmitz, Mark D.-
Autor(es): dc.creatorKamo, Sandra L.-
Autor(es): dc.creatorGerdes, Axel-
Autor(es): dc.creatorCorfu, Fernando-
Autor(es): dc.creatorTapster, Simon-
Autor(es): dc.creatorLancaster, Penelope-
Autor(es): dc.creatorStorey, Craig Darryl-
Autor(es): dc.creatorBasei, Miguel Ângelo Stipp-
Autor(es): dc.creatorTohver, Eric-
Autor(es): dc.creatorAlkmim, Ana Ramalho-
Autor(es): dc.creatorNalini Júnior, Hermínio Arias-
Autor(es): dc.creatorKrambrock, Klaus Wilhelm Heinrich-
Autor(es): dc.creatorLeite, Cristiano Fantini-
Autor(es): dc.creatorWiedenbeck, Michael-
Data de aceite: dc.date.accessioned2025-08-21T15:53:43Z-
Data de disponibilização: dc.date.available2025-08-21T15:53:43Z-
Data de envio: dc.date.issued2017-10-17-
Data de envio: dc.date.issued2017-10-17-
Data de envio: dc.date.issued2017-
Fonte completa do material: dc.identifierhttp://www.repositorio.ufop.br/handle/123456789/8946-
Fonte completa do material: dc.identifierhttp://onlinelibrary.wiley.com/doi/10.1111/ggr.12167/abstract-
Fonte completa do material: dc.identifierhttps://doi.org/10.1111/ggr.12167-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1026794-
Descrição: dc.descriptionA 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).-
Formato: dc.formatapplication/pdf-
Idioma: dc.languageen-
Direitos: dc.rightsrestrito-
Palavras-chave: dc.subjectSri Lankan reference material-
Palavras-chave: dc.subjectRare earth elements-
Título: 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.-
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