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Previous issue date: 2011-10-21 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / Deformation bands are structures, developed in porous sandstones, that has small offsets and they are not shown on seismic section. The deformation bands of the pre and synrift sandstones of Araripe Basin were studied in outcrop, macroscopic and microscopic scales. The hierarchical, cinematic and spatial-geometric characteristics, and also the deformational mechanisms acting during its structural evolution were established too. In general, the mesoscopic scale observation allowed to discriminate deformation bands as singles or clusters in three main sets: NNE-SSW dextral; NE-SW normal (sometimes with strike-slip offset); and E-W sinistral; further a bed-parallel deformation bands as a local set. The microscopic characterization allowed to recognize the shearing and cataclastic character of such structures. Through the multi-scale study done in this work we verified that deformation bands analyzed were preferentially developed when sandstones under advanced stage of lithification. We also infer that the geometrical-spatial complexity of these bands, together with the presence of cataclastic matrix, can difficult the migration of fluids in reservoir rocks, resulting on their compartmentalization. Therefore, the study of deformation bands can aid researches about the structural evolution of sedimentary basin, as well as collaborate to understand the hydrodynamic behavior of reservoirs compartmented by these deformational structures / As bandas de deforma??o s?o estruturas, desenvolvidas em arenitos porosos, que mostram pequenos rejeitos e n?o s?o image?veis em sec??es s?smica. As bandas de deforma??o dos arenitos pr? e sinrifte da Bacia do Araripe foram estudadas em escalas de afloramento, amostra de m?o e se??o delgada. As caracter?sticas, tais como hier?rquica, cinem?tica e geom?trico-espacial, al?m dos mecanismos deformacionais atuantes durante o seu desenvolvimento estrutural, foram estabelecidas. De modo geral, a observa??o em escala mesosc?pica permitiu diferenciar as bandas de deforma??o em estruturas individuais ou agrupadas dispostas em tr?s conjuntos principais: NNE-SSW dextrais; NE-SW normais (por vezes com componente direcional); e E-W sinistrais; e um conjunto peculiar, de car?ter local, (sub-) paralelo aos planos de acamamento. A caracteriza??o em micro-escala, por sua vez, possibilitou reconhecer o car?ter catacl?stico dessas estruturas, bem como observar seus crit?rios cinem?ticos. Atrav?s do estudo multi-escalar realizado neste trabalho, verificou-se que as bandas de deforma??o desenvolveram-se, preferencialmente em arenitos em avan?ado est?gio de litifica??o. Inferiu-se tamb?m que a complexidade geom?trico-espacial das bandas, aliada ? presen?a de matriz catacl?stica, pode dificultar a migra??o de fluidos em rochas-reservat?rio, levando ? sua compartimenta??o. O estudo de bandas de deforma??o pode subsidiar pesquisas sobre a evolu??o estrutural de bacias sedimentares, bem como para compreender o comportamento hidrodin?mico de reservat?rios compartimentados por essas estruturas deformacionais
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/18832 |
| Date | 21 October 2011 |
| Creators | Netto, Jo?o Marculino de Ara?jo |
| Contributors | CPF:15461483453, http://lattes.cnpq.br/8572129314081197, Sa, Emanuel Ferraz Jardim de, CPF:06892922449, http://lattes.cnpq.br/4094827215552998, Fran?olin, Jo?o Batista Lellis, CPF:54402018820, http://lattes.cnpq.br/0508573069428360, Silva, Fernando Cesar Alves da |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Geodin?mica e Geof?sica, UFRN, BR, Geodin?mica; Geof?sica |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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