Uranium-lead dating method at the Pará-Iso isotope geology laboratory, UFPA, Belém - Brazil
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| Formato: | Artículo científico |
| Lenguaje: | en |
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Academia Brasileira de Ciências
2007
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| _version_ | 1876484375034462208 |
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| author | Robert S. Krymsky |
| author_facet | Robert S. Krymsky |
| contents | Uranium-lead dating method at the Pará-Iso isotope geology laboratory, UFPA, Belém - Brazil Robert S. Krymsky Moacir J.B. Macambira Jean-Michel Lafon Gérson S. Estumano Multidisciplinaria (Ciencias Naturales y Exactas) zircon Pb dating isotope dilution accessory mineral Analytical procedures for U-Pb isotope dilution analyses at the Pará-Iso isotope geology laboratory of the FederalUniversity of Pará (UFPA) are described in detail. The procedures are applied to zircon, titanite, rutile, apatite,columbite-tantalite and whole rock. Reagent preparation and chemical processing are done in clean-room conditions.Samples are dissolved using Teflon microcapsules in steel jacket Teflon Parr Instrument bomb or Teflonscrew cap containers. U and Pb are separated using anion exchange AG 1x8 resin columns. Typical blanks for mineralsample amounts of 0.01 to 1.0 mg are less than 1 pg U and 20-30 pg Pb. Isotope analysis of the U and Pb from thesame filament are carried out using a Finnigan MAT 262 mass-spectrometer in static and dynamic modes. The currentanalytical level is demonstrated on analyses of international standard zircon 91500 with three different 235U-205Pb and235U-208Pb isotope tracers and whole rock standards. Results of analyses of two zircon samples are also presented. 2007 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32779114 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.1 Vol.79 |
| format | Artículo científico |
| id | redalyc_32779114 |
| institution | Redalyc |
| language | en |
| publishDate | 2007 |
| publisher | Academia Brasileira de Ciências |
| spellingShingle | Uranium-lead dating method at the Pará-Iso isotope geology laboratory, UFPA, Belém - Brazil Robert S. Krymsky Multidisciplinaria (Ciencias Naturales y Exactas) zircon Pb dating isotope dilution accessory mineral Uranium-lead dating method at the Pará-Iso isotope geology laboratory, UFPA, Belém - Brazil Robert S. Krymsky Moacir J.B. Macambira Jean-Michel Lafon Gérson S. Estumano Multidisciplinaria (Ciencias Naturales y Exactas) zircon Pb dating isotope dilution accessory mineral Analytical procedures for U-Pb isotope dilution analyses at the Pará-Iso isotope geology laboratory of the FederalUniversity of Pará (UFPA) are described in detail. The procedures are applied to zircon, titanite, rutile, apatite,columbite-tantalite and whole rock. Reagent preparation and chemical processing are done in clean-room conditions.Samples are dissolved using Teflon microcapsules in steel jacket Teflon Parr Instrument bomb or Teflonscrew cap containers. U and Pb are separated using anion exchange AG 1x8 resin columns. Typical blanks for mineralsample amounts of 0.01 to 1.0 mg are less than 1 pg U and 20-30 pg Pb. Isotope analysis of the U and Pb from thesame filament are carried out using a Finnigan MAT 262 mass-spectrometer in static and dynamic modes. The currentanalytical level is demonstrated on analyses of international standard zircon 91500 with three different 235U-205Pb and235U-208Pb isotope tracers and whole rock standards. Results of analyses of two zircon samples are also presented. 2007 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32779114 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.1 Vol.79 |
| title | Uranium-lead dating method at the Pará-Iso isotope geology laboratory, UFPA, Belém - Brazil |
| topic | Multidisciplinaria (Ciencias Naturales y Exactas) zircon Pb dating isotope dilution accessory mineral |
| url | https://www.redalyc.org/articulo.oa?id=32779114 |