New constraints on ages of glasses proposed as reference materials for fission-track dating

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dc.contributor.authorLaurenzi, Marinella A.
dc.contributor.authorBalestrieri, Maria Laura
dc.contributor.authorBigazzi, Giulio
dc.contributor.authorNeto, Julio C. Hadler
dc.contributor.authorIunes, Pedro J.
dc.contributor.authorNorelli, Pio
dc.contributor.authorOddone, Massimo
dc.contributor.authorOsorio Araya, Ana Maria
dc.contributor.authorViramonte, Jose G.
dc.contributor.institutionCNR
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.contributor.institutionUniv Pavia
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniv Nacl Salta
dc.date.accessioned2014-05-20T13:22:56Z
dc.date.available2014-05-20T13:22:56Z
dc.date.issued2007-06-01
dc.description.abstractNew analyses have been performed in order to enhance the data-set on the independent ages of four glasses that have been proposed as reference materials for fission-track dating. The results are as follows. Moldavite - repeated (40)Ar/(39)Ar age determinations on samples from deposits from Bohemia and Moravia yielded an average of 14.34 +/- 0.08 Ma. This datum agrees with other recent determinations and is significantly younger than the (40)Ar/(39)Ar age of 15.21 +/- 0.15 Ma determined in the early 1980s. Macusanite (Peru) -four K-Ar ages ranging from 5.44 +/- 0.06 to 5.72 +/- 0.12 Ma have been published previously. New (40)Ar/(39)Ar ages gave an average of 5.12 +/- 0.04 Ma. Plateau fission-track ages determined using the IRMM-540 certified glass and U and Th thin films for neutron fluence measurements agree better with these new (40)Ar/(39)Ar ages than the previously published ages. Roccastrada glass (Italy) - a new (40)Ar/(39)Ar age, 2.45 +/- 0.04 Ma, is consistent with previous determinations. The Quiron obsidian (Argentina) is a recently discovered glass that has been proposed as an additional reference material for its high spontaneous track density (around 100 000 cm(-2)). Defects that might produce spurious tracks are virtually absent. An independent (40)Ar/(39)Ar age of 8.77 +/- 0.09 Ma was determined and is recommended for this glass. We believe that these materials, which will be distributed upon request to fission-track groups, will be very useful for testing system calibrations and experimental procedures.en
dc.description.affiliationCNR, Ist Geosci & Georisorse, I-56124 Pisa, Italy
dc.description.affiliationUniv Estadual Campinas, Inst Fis, Dept Raios Cosm & Cronol, BR-13083970 Campinas, SP, Brazil
dc.description.affiliationUniv Pavia, Dipartimento Chim Gen, I-27100 Pavia, Italy
dc.description.affiliationUniv Estado São Paulo, UNESP, Dept Fis Quim & Biol, BR-19060900 Presidente Prudente, SP, Brazil
dc.description.affiliationUniv Nacl Salta, Inst Geonorte, RA-4400 Salta, Argentina
dc.description.affiliationUnespUniv Estado São Paulo, UNESP, Dept Fis Quim & Biol, BR-19060900 Presidente Prudente, SP, Brazil
dc.format.extent105-124
dc.identifierhttp://dx.doi.org/10.1111/j.1751-908X.2007.00844.x
dc.identifier.citationGeostandards and Geoanalytical Research. Malden: Wiley-blackwell, v. 31, n. 2, p. 105-124, 2007.
dc.identifier.doi10.1111/j.1751-908X.2007.00844.x
dc.identifier.issn1639-4488
dc.identifier.lattes1543738193935256
dc.identifier.urihttp://hdl.handle.net/11449/6828
dc.identifier.wosWOS:000247205300004
dc.language.isoeng
dc.publisherWiley-Blackwell
dc.relation.ispartofGeostandards and Geoanalytical Research
dc.relation.ispartofjcr3.929
dc.relation.ispartofsjr1,430
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectfission-track datingpt
dc.subject(40)Ar/(39)Ar datingpt
dc.subjectnatural glassespt
dc.subjectage standardspt
dc.titleNew constraints on ages of glasses proposed as reference materials for fission-track datingen
dc.typeArtigo
dcterms.licensehttp://olabout.wiley.com/WileyCDA/Section/id-406071.html
dcterms.rightsHolderWiley-Blackwell
unesp.author.lattes1543738193935256[8]
unesp.author.orcid0000-0003-1426-9476[1]
unesp.author.orcid0000-0003-3580-4925[7]
unesp.author.orcid0000-0002-3727-2574[8]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências e Tecnologia, Presidente Prudentept

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Artigos - Física, Química e Biologia - FCT