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Previous issue date: 2009-05-13 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / The study area is located on the Brazilian Continental Shelf adjacent to Cear? State, inserted in the submerged Potiguar Basin. This area was submitted to extensional
efforts during Upper Cretaceous, associated to the begining of the rifting that resulted in African and South American Continent separation. The main goal of this research was to better understand the sedimentary and geomorphological characteristics of the continental shelf adjacent to Fortim, Aracati and Icapu? (Cear? State). The used data base included geophysical (sides scan sonar and bathymetry studies) and sedimentological survey, associated to satellite image
processing and interpretation. Inferences about suspended material and longshore drift was possible using satellite images, and differente bedforms were characterized such as: different kinds of dunes (longitudinal, cross and oblique), bioclastic banks, paleochannels, flat and rock bottom. The researched area comprehended about 2509,13 km2, where 6 different
sedimentary facies, based on sediment composition and texture, could be recognized, such as: Bioclastic Sand, Siliciclastic Sand, Biosiliciclastic Sand, Bioclastic gravel,
Biosiliciclastic sand with granule and gravel, and Silicibioclastic sand with granule and gravel. The integration of bathymetric, satellite image, side scan sonar and sedimentological data allow us a better characterization of this continental shelf area, as
to advance in the knowledge of the continental shelf of the state of Ceara, a very important area to the oil industry because of its potential exploration and e exploitation, and to environmental survey as well / A ?rea em estudo compreende a Plataforma Continental Cearense inserida no contexto tect?nico e sedimentar da Bacia Potiguar, por??o submersa. Regi?o formada por esfor?os extensionais durante o Cret?ceo Inferior, associados ao in?cio do rifteamento que resultaria na separa??o das placas sul-americana e africana. Objetivando contribuir para um maior conhecimento das caracter?sticas sedimentol?gicas e geomorfol?gicas da plataforma continental adjacente aos munic?pios de Fortim, Aracati e Icapu? (CE). Foram realizado coleta, interpreta??o e integra??o de dados do sonar de varredura lateral, imagem de sat?lite, batimetria e amostras de
sedimentos superficiais. Infer?ncias quanto ao material em suspens?o e deriva litor?nea foram obtidas a partir do processsamento digital de imagens (PDI), enquanto a caracteriza??o das fei??es do fundo marinho, tais como: dunas longitudinais, dunas transversais e dunas obliquas, bancos de sedimentos biocl?sticos, paleocanais submersos, leito plano e fundo rochoso foram obtidas a partir da integra??o de dados batim?tricos sonogr?ficos e PDI. Quanto a sedimentologia, com base na composi??o e textura, foram identificados na ?rea em estudo 6 f?cies sedimentares, abrangendo uma ?rea total de
2509,13 Km2, sendo elas: Areias Biocl?sticas, Areia Silicicl?stica, Areias Biosilicicl?sticas, Areia Cascalhosa Biocl?stica, Areia Cascalhosa Biosilicicl?stica e Areias Cascalhosas Silicibiocl?sticas; al?m de rochas praiais (beachrocks) e fundo rochoso. A integra??o entre os dados batim?tricos, PDI, sonogr?ficos e sedimentol?gicos,
mostrou-se apropriada para a caracteriza??o morfol?gica e sedimentol?gica da Plataforma Continental da ?rea em estudo, desta forma avan?ando no conhecimento da Plataforma Continental Cearense, regi?o de interesse para a ind?stria do petr?leo tanto no ponto de vista da explota??o e explora??o de hidrocarbonetos, como tamb?m ambiental
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/18780 |
| Date | 13 May 2009 |
| Creators | Oliveira, Patricia Reis Alencar |
| Contributors | CPF:31481981404, http://lattes.cnpq.br/3595069999049968, Freire, George Satander S?, CPF:07296649372, http://lattes.cnpq.br/6803944360256138, Tabosa, Werner Farkatt, CPF:65556224404, http://lattes.cnpq.br/1313536081076361, Vital, Helenice |
| 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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