| 1. Identificação | |
| Tipo de Referência | Artigo em Revista Científica (Journal Article) |
| Site | mtc-m16c.sid.inpe.br |
| Código do Detentor | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
| Identificador | 6qtX3pFwXQZQjxQKY/NnH34 |
| Repositório | sid.inpe.br/ePrint@80/2006/12.06.09.20 |
| Última Atualização | 2006:12.06.08.35.50 (UTC) administrator |
| Repositório de Metadados | sid.inpe.br/ePrint@80/2006/12.06.09.20.08 |
| Última Atualização dos Metadados | 2018:06.04.04.12.46 (UTC) administrator |
| ISSN | 0100-204X |
| Chave de Citação | PazRoss:2006:InFaIs |
| Título | Paleohydrology of an Upper Aptian lacustrine system from northeastern Brazil: integration of facies and isotopic geochemistry  |
| Ano | 2006 |
| Mês | 2006-05-03 |
| Data de Acesso | 13 maio 2024 |
| Tipo Secundário | PRE PN |
| Número de Arquivos | 1 |
| Tamanho | 1706 KiB |
| 2. Contextualização | |
| Autor | 1 Paz, Jackson Douglas 2 Rossetti, Dilce de Fátima |
| Grupo | 1 2 DSR-INPE-MCT-BR |
| Afiliação | 1 UFA 2 INPE |
| Endereço de e-Mail | rossetti@dsr.inpe.br |
| Revista | Pesquisa Agropecuária Brasileira |
| Volume | 241 |
| Número | 2 |
| Páginas | 247-266. |
| Histórico (UTC) | 2007-05-15 12:19:00 :: rossetti -> administrator :: 2007-07-04 14:30:45 :: administrator -> marciana :: 2008-04-18 15:26:31 :: marciana -> banon :: 2010-05-10 18:50:43 :: banon -> administrator :: 2018-06-04 04:12:46 :: administrator -> marciana :: 2006 |
| 3. Conteúdo e estrutura | |
| É a matriz ou uma cópia? | é a matriz |
| Estágio do Conteúdo | concluido |
| Transferível | 1 |
| Tipo do Conteúdo | External Contribution |
| Palavras-Chave | sedimentologia paleoambiente sistema lacustre isótopos |
| Resumo | The Codó Formation records the initial evolutionary stages of an intracontinental rift system formed along the Brazilian equatorial margin in the Late Aptian. Deposits of this unit exposed on the eastern margin of the Grajaú Basin include gypsum, bituminous black shales and limestones. These lithologies were formed in a low energy, well stratified, anoxic and hypersaline lake system developed in a dominantly arid/semi-arid climate. This lacustrine succession is internally organized into three categories of shallowing-upward cycles, with the first- and second-order cycles being related to seismic activity associated with fault reactivations, and the third-order cycles recording climatic fluctuations. Studies emphasizing petrography and analysis of the geochemical tracers Fe, Mg, Sr, Mn, Na and Ca helped to identify the sedimentary facies that kept a primary signal, which were thus appropriate for isotopic investigations aiming paleoenvironmental and paleohydrologic reconstructions. The results of this study revealed a wide distribution of dominantly low carbon and oxygen isotope values in carbonates, ranging from ?5.69 ? to ?13.02 ? and from ?2.71? to ?10.80?, respectively. This paper demonstrates that at least in the particular case of oxygen, the isotope ratios vary according to seismically-induced shallowing-upward cycles, with values in general lower at their bases, where central lake deposits dominate, and progressively higher upward, where marginal lake deposits are more widespread. In addition to confirming a depositional signature for the analysed samples, this behavior allowed the development of a seismic-induced isotope model. These lighter isotope ratios appear to be related to flooding events promoted by subsidence, which resulted in the development of a perennial lake system, while heavier isotope values are related to ephemeral lake phases favored by uplift and/or increased stability. Furthermore, the results show that a closed lake system dominated, as indicated by the overall good positive covariance (i.e., 0.42 to 0.43) between the carbon and oxygen isotopes, though open phases are also recorded by negative covariance values of ?0.36. During closed phases, the 18O displayed the highest range of variation (i.e., ?3.63? to ?4.89?) due to increased residence time, while this variation was low (i.e., ?0.09? to -1.87 ?) during open lake phases, when there was a balance in the water isotope composition maintained by continuous basin inflow. |
| Área | SRE |
| Conteúdo da Pasta doc | acessar |
| Conteúdo da Pasta source | não têm arquivos |
| Conteúdo da Pasta agreement | não têm arquivos |
| 4. Condições de acesso e uso | |
| URL dos dados | http://urlib.net/ibi/6qtX3pFwXQZQjxQKY/NnH34 |
| URL dos dados zipados | http://urlib.net/zip/6qtX3pFwXQZQjxQKY/NnH34 |
| Idioma | en |
| Arquivo Alvo | Paz & Rossetti.pdf |
| Grupo de Usuários | administrator banon rossetti |
| Visibilidade | shown |
| Política de Arquivamento | allowpublisher allowfinaldraft |
| Permissão de Leitura | allow from all |
| 5. Fontes relacionadas | |
| Edição Anterior | sid.inpe.br/ePrint@80/2006/05.02.19.39 |
| Unidades Imediatamente Superiores | 8JMKD3MGPCW/3ER446E |
| Divulgação | WEBSCI; PORTALCAPES; SCIELO. |
| Acervo Hospedeiro | sid.inpe.br/mtc-m18@80/2008/03.17.15.17 |
| 6. Notas | |
| Campos Vazios | alternatejournal archivist callnumber copyholder copyright creatorhistory descriptionlevel documentstage doi electronicmailaddress format isbn label lineage mark mirrorrepository nextedition notes orcid parameterlist parentrepositories previouslowerunit progress project readergroup resumeid rightsholder schedulinginformation secondarydate secondarykey secondarymark session shorttitle sponsor subject tertiarymark tertiarytype typeofwork url versiontype |
| 7. Controle da descrição | |
| e-Mail (login) | marciana |
| atualizar | |