50 anos da UNESP
Logo do repositório

The Th/U ratio in minerals by a fission-track technique: Application to some reference samples in order to estimate the influence of Th in fission-track dating

Página do item simplificado
dc.contributor.authorIunes, P. J.
dc.contributor.authorBigazzi, G.
dc.contributor.authorHadler N, J. C.
dc.contributor.authorTello S, C.
dc.contributor.authorGuedes O, S.
dc.contributor.authorPaulo, S. R.
dc.contributor.authorBalestrieri, M. L.
dc.contributor.authorNorelli, P.
dc.contributor.authorOddone, M.
dc.contributor.authorOsorio A, A. M.
dc.contributor.authorZuñiga, A.
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.contributor.institutionC.N.R.
dc.contributor.institutionUFRGS
dc.contributor.institutionUFMT
dc.contributor.institutionUniversità degli Studi di Firenze
dc.contributor.institutionUniversità di Pavia
dc.contributor.institutionUniversidade do Estado de São Paulo
dc.contributor.institutionIPEN
dc.date.accessioned2022-04-28T18:54:36Z
dc.date.available2022-04-28T18:54:36Z
dc.date.issued2002-01-01
dc.description.abstractIn this work, a recent technique for the determination of the Th/U ratio in minerals and glasses was applied to relevant samples used as reference in fission-track (FT) dating. This technique, developed for estimating the influence of tracks due to the induced fission of thorium in the irradiation with neutron used in the FT dating routine, proved to be adequate for this purpose. One of the age standard used for FT dating, the Durango apatite, yielded a very high Th/U ratio (around 30). Only in case of such a high Th/U ratios did the technique used in this work yield a Th/U value with acceptable precision. For the other studied samples - glasses Macusanite, Moldavite and JAS-G1 - which have Th/U ratios < 5, the experimental error of the Th/U measurement is very high. However, in these cases the contribution of the Th fission to the population of induced tracks is also negligible. For its large Th/U ratio the Durango apatite may introduce systematic errors in FT dating, unless irradiation facilities with high thermalization are used. © 2002 Elsevier Science Ltd. All rights reserved.en
dc.description.affiliationInstituto de Fisica Gleb Wataghin Universidade Estadual de Campinas UNICAMP, 13083-970 Campinas, SP
dc.description.affiliationIstituto di Geocronologia e Geochimica Isotopica C.N.R., Area della Ricerca di Pisa, Via G. Moruzzi 1, 56124 Pisa
dc.description.affiliationInstituto de Geociências Universidade Federal do Rio Grande do Sul UFRGS, 91501-970 Porto Alegre, RS
dc.description.affiliationInstituto de Ciências Exatas e da Terra Universidade Federal do Mato Grosso UFMT, 78070-900 Cuiabá, MT
dc.description.affiliationDipartimento di Scienze della Terra Università degli Studi di Firenze, Via La Pira 4, 50121 Firenze
dc.description.affiliationDipartimento di Chimica Generale Università di Pavia, Viale Taramelli 12, 27100 Pavia
dc.description.affiliationDepartamento de Ciências Ambientais Universidade do Estado de São Paulo, 19060-900 Presidente Prudente, SP
dc.description.affiliationInstituto Peruano de Energia Nuclear IPEN, Av. Canada 1470, Lima 41
dc.format.extent195-201
dc.identifierhttp://dx.doi.org/10.1016/S1350-4487(01)00293-1
dc.identifier.citationRadiation Measurements, v. 35, n. 3, p. 195-201, 2002.
dc.identifier.doi10.1016/S1350-4487(01)00293-1
dc.identifier.issn1350-4487
dc.identifier.scopus2-s2.0-0036012696
dc.identifier.urihttp://hdl.handle.net/11449/219262
dc.language.isoeng
dc.relation.ispartofRadiation Measurements
dc.sourceScopus
dc.subjectDurango apatite
dc.subjectFission-track dating
dc.subjectTh thin film
dc.subjectTh/U ratio
dc.subjectU thin film
dc.titleThe Th/U ratio in minerals by a fission-track technique: Application to some reference samples in order to estimate the influence of Th in fission-track datingen
dc.typeArtigo
dspace.entity.typePublication

Arquivos

Coleções

Artigos