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https://repositorio.ufba.br/handle/ri/7658
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Campo DC | Valor | Idioma |
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dc.contributor.author | Iyer, Sundaram Sankara Subba | - |
dc.contributor.author | Babinski, M. | - |
dc.contributor.author | Marinho, M. M. | - |
dc.contributor.author | Barbosa, J .S. F. | - |
dc.contributor.author | Sato, I. M. | - |
dc.contributor.author | Salvador, V. L. | - |
dc.creator | Iyer, Sundaram Sankara Subba | - |
dc.creator | Babinski, M. | - |
dc.creator | Marinho, M. M. | - |
dc.creator | Barbosa, J .S. F. | - |
dc.creator | Sato, I. M. | - |
dc.creator | Salvador, V. L. | - |
dc.date.accessioned | 2012-12-18T20:19:44Z | - |
dc.date.issued | 1999-03 | - |
dc.identifier.issn | 0883-2927 | - |
dc.identifier.uri | http://www.repositorio.ufba.br/ri/handle/ri/7658 | - |
dc.description | Texto completo: acesso restrito, p.197–221 | pt_BR |
dc.description.abstract | Lead–lead isotope data from whole rock samples are used to investigate the recent (last few million years) mobility of U and Th. The method is based on the comparison of the calculated present day U and Th concentrations required to yield the Pb isotope composition in the samples with the actual present day concentrations of U and Th obtained by direct measurement. The geological formations studied include the Neoproterozoic carbonate sediments of the Bambuı́ Group, Archean/Paleoproterozoic granite–greenstone terrain of the Contendas–Mirante Complex and a Proterozoic ortho-gneisses hosting U deposit in Lagoa Real. All these formations are in the São Francisco Craton, Brazil. The data show high U mobility in the carbonate sediments and in the deformed ortho-gneisses set in a ductile shear zone. Infiltration of groundwater through fault zones seems to have facilitated the U mobility. The Pb isotope approach is a useful technique complementing U-series disequilibrium studies and may be included for site characterization studies for radioactive waste disposal. | pt_BR |
dc.language.iso | en | pt_BR |
dc.source | http://dx.doi.org/10.1016/S0883-2927(98)00040-7 | pt_BR |
dc.title | Lead isotope evidence for recent uranium mobility in geological formations of Brazil: implications for radioactive waste disposal | pt_BR |
dc.title.alternative | Applied Geochemistry | pt_BR |
dc.type | Artigo de Periódico | pt_BR |
dc.identifier.number | v. 14, n. 2 | pt_BR |
dc.embargo.liftdate | 10000-01-01 | - |
Aparece nas coleções: | Artigo Publicado em Periódico (IGEO) |
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Marinho.pdf Restricted Access | 609,38 kB | Adobe PDF | Visualizar/Abrir Solicitar uma cópia |
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