The Sm-Nd isotopic method in the geochronology laboratory of the University of Brasília
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Academia Brasileira de Ciências
2000
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| author | S.M.C.L. Gioia |
| author_facet | S.M.C.L. Gioia |
| contents | The Sm-Nd isotopic method in the geochronology laboratory of the University of Brasília S.M.C.L. Gioia M. M. Pimentel Multidisciplinaria (Ciencias Naturales y Exactas) Sm TIMS Nd method isotope dilution ion exchange chromatography Nd isotopes represent one of the best tools to investigate the processes involved in the evolutionof the continental crust and mantle. This is due mainly to the similar geochemical behaviour ofSm and Nd, both light rare earth elements, which inhibits their fractionation during most variedgeological processes. In order to carry out crustal evolution studies in central Brazil, the Sm-Ndisotopic method was implanted at the Geochronology Laboratory of the University of Brasília.The Sm-Nd separation methodology is basically that described in Richard et al. (1976), withthe addition of some improvements. In this study we describe in detail the methodology usedin Brasília. Precision and accuracy were checked with the international standards such as JB-3, BCR-1, BHVO-1 and La Jolla, and the following results were found: JB-3 (Nd=15.74 ppmand Sm=4.28 ppm), BCR-1 (143Nd/144Nd=0.512647±8, Nd=28.73 ppm and Sm=6.66 ppm),BHVO-1 (Nd=24.83 ppm and Sm=6.2 ppm) and La Jolla (143Nd/144Nd=0.511835±14). 2000 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32772209 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.2 Vol.72 |
| format | Artículo científico |
| id | redalyc_32772209 |
| institution | Redalyc |
| language | en |
| publishDate | 2000 |
| publisher | Academia Brasileira de Ciências |
| spellingShingle | The Sm-Nd isotopic method in the geochronology laboratory of the University of Brasília S.M.C.L. Gioia Multidisciplinaria (Ciencias Naturales y Exactas) Sm TIMS Nd method isotope dilution ion exchange chromatography The Sm-Nd isotopic method in the geochronology laboratory of the University of Brasília S.M.C.L. Gioia M. M. Pimentel Multidisciplinaria (Ciencias Naturales y Exactas) Sm TIMS Nd method isotope dilution ion exchange chromatography Nd isotopes represent one of the best tools to investigate the processes involved in the evolutionof the continental crust and mantle. This is due mainly to the similar geochemical behaviour ofSm and Nd, both light rare earth elements, which inhibits their fractionation during most variedgeological processes. In order to carry out crustal evolution studies in central Brazil, the Sm-Ndisotopic method was implanted at the Geochronology Laboratory of the University of Brasília.The Sm-Nd separation methodology is basically that described in Richard et al. (1976), withthe addition of some improvements. In this study we describe in detail the methodology usedin Brasília. Precision and accuracy were checked with the international standards such as JB-3, BCR-1, BHVO-1 and La Jolla, and the following results were found: JB-3 (Nd=15.74 ppmand Sm=4.28 ppm), BCR-1 (143Nd/144Nd=0.512647±8, Nd=28.73 ppm and Sm=6.66 ppm),BHVO-1 (Nd=24.83 ppm and Sm=6.2 ppm) and La Jolla (143Nd/144Nd=0.511835±14). 2000 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32772209 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.2 Vol.72 |
| title | The Sm-Nd isotopic method in the geochronology laboratory of the University of Brasília |
| topic | Multidisciplinaria (Ciencias Naturales y Exactas) Sm TIMS Nd method isotope dilution ion exchange chromatography |
| url | https://www.redalyc.org/articulo.oa?id=32772209 |