O método radiométrico RB-Sr aplicado em rochas sedimentares o exemplo da bacia do Paraná, Brasil
Autor(a) principal: | |
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Data de Publicação: | 2006 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/22628 |
Resumo: | The Rb-Sr method has been successfully applied to argillaceous sedimentary rocks in order to supply parameters for the definition of their depositional ages. In many studied cases, despite the geologically significant results, there are doubts concerning the interpretation of the obtained data and their limitations. This happens because sedimentary rocks are considered to be the mixture of detrital fragments of diverse sources, and therefore is the possibility of contain an isotopic record of their source rocks. The Rb-Sr method, when applied to mudrocks, allows constraining absolute depositional ages, owing to the resetting of the isotopic Rb/Sr system during deposition. This process is called isotopic homogenization in the depositional environment. Some special care must be taken with respect to sampling, sample grain size, depositional setting, and mineralogical composition. Nevertheless, questions still remain when concerning this methodology, particularly on the real occurrence and extent of the isotopic homogenization in the sedimentary environments. In the present work, the Rb-Sr method has been applied to samples of sedimentary rocks collected from different units representing several depositional settings from the Paraná Basin. The parameters responsible by the isotopic homogenization of Sr have been evaluated. The obtained results allowed the improvement of the application of the Rb-Sr method to sedimentary rocks, and significant results concerning depositional ages were obtained. |
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Silva, Diogo Rodrigues Andrade daMizusaki, Ana Maria PimentelAnjos, Sylvia Maria Couto dosConceição, Rommulo Vieira2010-05-20T04:16:27Z20061518-2398http://hdl.handle.net/10183/22628000603253The Rb-Sr method has been successfully applied to argillaceous sedimentary rocks in order to supply parameters for the definition of their depositional ages. In many studied cases, despite the geologically significant results, there are doubts concerning the interpretation of the obtained data and their limitations. This happens because sedimentary rocks are considered to be the mixture of detrital fragments of diverse sources, and therefore is the possibility of contain an isotopic record of their source rocks. The Rb-Sr method, when applied to mudrocks, allows constraining absolute depositional ages, owing to the resetting of the isotopic Rb/Sr system during deposition. This process is called isotopic homogenization in the depositional environment. Some special care must be taken with respect to sampling, sample grain size, depositional setting, and mineralogical composition. Nevertheless, questions still remain when concerning this methodology, particularly on the real occurrence and extent of the isotopic homogenization in the sedimentary environments. In the present work, the Rb-Sr method has been applied to samples of sedimentary rocks collected from different units representing several depositional settings from the Paraná Basin. The parameters responsible by the isotopic homogenization of Sr have been evaluated. The obtained results allowed the improvement of the application of the Rb-Sr method to sedimentary rocks, and significant results concerning depositional ages were obtained.application/pdfporPesquisas em Geociências. Vol. 33, n. 1 (2006), p. 83-100Rochas sedimentares : Método radiométricoRb-Sr datingSedimentary rocksParaná BasinDepositional agesO método radiométrico RB-Sr aplicado em rochas sedimentares o exemplo da bacia do Paraná, Brasilinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000603253.pdf000603253.pdfTexto completoapplication/pdf4023840http://www.lume.ufrgs.br/bitstream/10183/22628/1/000603253.pdf24b38f15a4c15d0d5b36a43e96f340dbMD51TEXT000603253.pdf.txt000603253.pdf.txtExtracted Texttext/plain64417http://www.lume.ufrgs.br/bitstream/10183/22628/2/000603253.pdf.txta088475108aa37cfbfacb7f5f2caa85dMD52THUMBNAIL000603253.pdf.jpg000603253.pdf.jpgGenerated Thumbnailimage/jpeg1820http://www.lume.ufrgs.br/bitstream/10183/22628/3/000603253.pdf.jpge2294618702e9407c006da23ed68b88fMD5310183/226282018-10-17 07:54:13.947oai:www.lume.ufrgs.br:10183/22628Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-10-17T10:54:13Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
O método radiométrico RB-Sr aplicado em rochas sedimentares o exemplo da bacia do Paraná, Brasil |
title |
O método radiométrico RB-Sr aplicado em rochas sedimentares o exemplo da bacia do Paraná, Brasil |
spellingShingle |
O método radiométrico RB-Sr aplicado em rochas sedimentares o exemplo da bacia do Paraná, Brasil Silva, Diogo Rodrigues Andrade da Rochas sedimentares : Método radiométrico Rb-Sr dating Sedimentary rocks Paraná Basin Depositional ages |
title_short |
O método radiométrico RB-Sr aplicado em rochas sedimentares o exemplo da bacia do Paraná, Brasil |
title_full |
O método radiométrico RB-Sr aplicado em rochas sedimentares o exemplo da bacia do Paraná, Brasil |
title_fullStr |
O método radiométrico RB-Sr aplicado em rochas sedimentares o exemplo da bacia do Paraná, Brasil |
title_full_unstemmed |
O método radiométrico RB-Sr aplicado em rochas sedimentares o exemplo da bacia do Paraná, Brasil |
title_sort |
O método radiométrico RB-Sr aplicado em rochas sedimentares o exemplo da bacia do Paraná, Brasil |
author |
Silva, Diogo Rodrigues Andrade da |
author_facet |
Silva, Diogo Rodrigues Andrade da Mizusaki, Ana Maria Pimentel Anjos, Sylvia Maria Couto dos Conceição, Rommulo Vieira |
author_role |
author |
author2 |
Mizusaki, Ana Maria Pimentel Anjos, Sylvia Maria Couto dos Conceição, Rommulo Vieira |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Silva, Diogo Rodrigues Andrade da Mizusaki, Ana Maria Pimentel Anjos, Sylvia Maria Couto dos Conceição, Rommulo Vieira |
dc.subject.por.fl_str_mv |
Rochas sedimentares : Método radiométrico |
topic |
Rochas sedimentares : Método radiométrico Rb-Sr dating Sedimentary rocks Paraná Basin Depositional ages |
dc.subject.eng.fl_str_mv |
Rb-Sr dating Sedimentary rocks Paraná Basin Depositional ages |
description |
The Rb-Sr method has been successfully applied to argillaceous sedimentary rocks in order to supply parameters for the definition of their depositional ages. In many studied cases, despite the geologically significant results, there are doubts concerning the interpretation of the obtained data and their limitations. This happens because sedimentary rocks are considered to be the mixture of detrital fragments of diverse sources, and therefore is the possibility of contain an isotopic record of their source rocks. The Rb-Sr method, when applied to mudrocks, allows constraining absolute depositional ages, owing to the resetting of the isotopic Rb/Sr system during deposition. This process is called isotopic homogenization in the depositional environment. Some special care must be taken with respect to sampling, sample grain size, depositional setting, and mineralogical composition. Nevertheless, questions still remain when concerning this methodology, particularly on the real occurrence and extent of the isotopic homogenization in the sedimentary environments. In the present work, the Rb-Sr method has been applied to samples of sedimentary rocks collected from different units representing several depositional settings from the Paraná Basin. The parameters responsible by the isotopic homogenization of Sr have been evaluated. The obtained results allowed the improvement of the application of the Rb-Sr method to sedimentary rocks, and significant results concerning depositional ages were obtained. |
publishDate |
2006 |
dc.date.issued.fl_str_mv |
2006 |
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2010-05-20T04:16:27Z |
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1518-2398 |
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000603253 |
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http://hdl.handle.net/10183/22628 |
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por |
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por |
dc.relation.ispartof.pt_BR.fl_str_mv |
Pesquisas em Geociências. Vol. 33, n. 1 (2006), p. 83-100 |
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