dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorResende, Rosana Silveira
dc.creatorTello Saenz, Carlos Alberto
dc.creatorCampos Curvo, Eduardo Augusto
dc.creatorLeopoldo Constantino, Carlos Jose
dc.creatorAroca, Ricardo F.
dc.creatorNakasuga, Wagner Massayuki
dc.date2014-12-03T13:11:40Z
dc.date2016-10-25T20:14:46Z
dc.date2014-12-03T13:11:40Z
dc.date2016-10-25T20:14:46Z
dc.date2014-05-01
dc.date.accessioned2017-04-06T06:32:58Z
dc.date.available2017-04-06T06:32:58Z
dc.identifierApplied Spectroscopy. Frederick: Soc Applied Spectroscopy, v. 68, n. 5, p. 549-556, 2014.
dc.identifier0003-7028
dc.identifierhttp://hdl.handle.net/11449/113388
dc.identifierhttp://acervodigital.unesp.br/handle/11449/113388
dc.identifier10.1366/13-07302
dc.identifierWOS:000335295400006
dc.identifierhttp://dx.doi.org/10.1366/13-07302
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/924130
dc.descriptionSpectroscopic and morphological studies, designed to improve our understanding of the physicochemical phenomena that occur during zircon crystallization, are presented. The zircon fission track method (ZFTM) is used routinely in various laboratories around the world; however, there are some methodological difficulties needing attention. Depending on the surface fission track density observed under an optical microscope, the zircon grain surfaces are classified as homogeneous, heterogeneous, hybrid, or anomalous. In this study, zircon grain surfaces are characterized using complementary techniques such as optical microscopy (OM), micro-Raman spectroscopy, and scanning electron microscopy (SEM), both before and after chemical etching. Our results suggest that anomalous grains have subfamilies and that etching anisotropy related to heterogeneous grains is due to different crystallographic faces within the same polished surface that cannot be observed under an optical microscope. The improved methodology was used to determine the zircon fission track ages of samples collected from the Bauru Group located in the north of Parana Basin, Brazil. A total of 514 zircon grains were analyzed, consisting of 10% homogeneous, about 10% heterogeneous, about 20% hybrid, and 60% anomalous grains. These results show that the age distributions obtained for homogeneous, heterogeneous, and hybrid grains are both statistically and geologically compatible.
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.languageeng
dc.publisherSoc Applied Spectroscopy
dc.relationApplied Spectroscopy
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectZircon
dc.subjectMicro-Raman spectroscopy
dc.subjectFission track method
dc.subjectScanning electron microscopy
dc.subjectSEM
dc.subjectZircon grain surface characterization
dc.subjectZircon chemical etching
dc.titleRaman Spectroscopy and Scanning Electron Microscopy Characterizations of Fission Track Method Datable Zircon Grains
dc.typeOtro


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