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http://repositorio.ufc.br/handle/riufc/64751
Tipo: | Artigo de Periódico |
Título: | Syngenetic and diagenetic features of evaporite-lutite successions of the Ipubi Formation, Araripe Basin, Santana do Cariri, NE Brazil |
Autor(es): | Nascimento Junior, Daniel Rodrigues do Silva Filho, Wellington Ferreira da Freire Junior, José Gervásio Santos, Felipe Holanda dos |
Palavras-chave: | Evaporites;Gypsum;Ceará State (Brazil);Araripe Basin;Ipubi Formation |
Data do documento: | 2016 |
Instituição/Editor/Publicador: | Journal of South American Earth Sciences |
Citação: | NASCIMENTO JUNIOR, Daniel Rodrigues do et al. Syngenetic and diagenetic features of evaporite-lutite successions of the Ipubi Formation, Araripe Basin, Santana do Cariri, NE Brazil. Journal of South American Earth Sciences, [s.l.], v. 72, p. 315-327, 2016. |
Abstract: | The Ipubi Formation in the Araripe Basin (Northeast Brazil) has evaporite-lutite successions rich in gypsum, a mineral of great regional economic relevance, a highlighted stratigraphic mark, and also a natural boundary for underlying successions potentially analogous to “Pre-Salt” hydrocarbon reservoirs of the Brazilian coastal basins. In this study, syngenetic and diagenetic aspects of the Ipubi Formation at Santana do Cariri (Ceara State) were investigated by means of facies analysis, petrography, and miner- alogical/chemical analyses of evaporites and shales.The results show that the contact relationship between evaporites and marly shales, without signs of subaerial exposure and laterally adjacent, was associated with shallow, calm and somewhat anoxic waterbodies, locally salt-supersaturated (brines) but under seasonal variations of water levels. This scenario could have shared place with hydrothermal phenomena in a playa lake depositional system. Regarding diagenesis, although there is evidence supporting pseudomorphic replacement of gypsum by anhydrite, the burial of the Ipubi Formation would have been limited due to the frequent occurrence of gypsum without any trace of chemical replacement. |
URI: | http://www.repositorio.ufc.br/handle/riufc/64751 |
ISSN: | 0895-9811 |
Tipo de Acesso: | Acesso Aberto |
Aparece nas coleções: | DGL - Artigos publicados em revista científica |
Arquivos associados a este item:
Arquivo | Descrição | Tamanho | Formato | |
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2016_art_drnascimentojunior.pdf | 9,13 MB | Adobe PDF | Visualizar/Abrir |
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