Compartimentação do relevo no hemigráben do Tacutu, Estado de Roraima
Autor(a) principal: | |
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Data de Publicação: | 2007 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFRR |
Texto Completo: | http://repositorio.ufrr.br:8080/jspui/handle/prefix/289 |
Resumo: | The sedimentary basin of the Tacutu is located in the state of Roraima, Brazil. It is an implanted distensive segment in the Mesozóic (upper Jurassic - lower Cretaceo). It is an half-graben incased in the Shield of the Guianas, prolongated in the northeast direction - southwestern, with about 300 km of length varying 30 the 50 width km, extending itself of the Republic of Guyana to the capital of the state of Roraima, Boa Vista. The half-graben was implanted in a zone of reactivation of the Belt of Central Guyana. The dynamics and evolution of the relief forms are conditioned by the result of successive periods of training in which it has as influence the tectonics processes and the external agents what vary throughout the time and they can be found in the evidences of the basin Tacutu, becoming thus an atypical area in the territory. We consideration the data already concerning the area in study and diverse research to understand the evolution of the process. The approach about the geomorphological compartimentation of graben of Tacutu using techniques of the Geographic Data Sistem by means of applicatory ArcGis 9.1. that favored the construction of a digital model of the land. They were delineated the curves of levels and the nets of drainings based on letters 1:100.000, which procedure disclosed an evident control of the draining suggesting the geomorphology of the searched area is controlled for normal imperfections NE-SW and for neotectonics activities compartimentments NW, being evidenced mainly in the rivers Arraia and Tacutu, and that they are ties the process of sedimentation of the Boa Vista Formation. The geomorphological compartimentation of the area is characterized through three main compartments: the Planície Amazônica, evidenced for being a plain area wich strechs itself for bands lightly prolongated deposited for the rivers arenaceous, argillaceous and conglomerates, recent sediments unconsolidated in general associates to the deposits of the Quaternary, mainly in the Holocene, of fluvial origin; the Boa Vista Depression represented for a planing surface,formed on pre-Cambrian and Phanerozoic rocks and the Residual Plateaus, divided in: Volcanic Residual, represented for the Apoteri Domain, Residual Sedimentary represented for the Tucano Montain range and the Residual of the Proterozoic that they are remainders that demonstrate the evolution of the regional relief, probably since the installation of the followed basin of its inversion, and the dissection of these residuals throughout the cenozoics times. The evolution process of this basin sedimentary was conditional the successive occurred climatic oscillations in the region during the Quaternary, that can be observed in the lines of rocks, as well as in the draining net, and still the presence of normal and transcorrentes imperfections, characteristic these that they had corroborated for the evolutive confirmation of the neotectonic picture of the basin. |
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Compartimentação do relevo no hemigráben do Tacutu, Estado de RoraimaGeomorfologiaRelevoHemigrábenRoraimaAnomalias de drenagemHalf-graben of the TacutuAnomalies of drainingNeotectonic controlCNPQ::CIENCIAS HUMANAS::GEOGRAFIAThe sedimentary basin of the Tacutu is located in the state of Roraima, Brazil. It is an implanted distensive segment in the Mesozóic (upper Jurassic - lower Cretaceo). It is an half-graben incased in the Shield of the Guianas, prolongated in the northeast direction - southwestern, with about 300 km of length varying 30 the 50 width km, extending itself of the Republic of Guyana to the capital of the state of Roraima, Boa Vista. The half-graben was implanted in a zone of reactivation of the Belt of Central Guyana. The dynamics and evolution of the relief forms are conditioned by the result of successive periods of training in which it has as influence the tectonics processes and the external agents what vary throughout the time and they can be found in the evidences of the basin Tacutu, becoming thus an atypical area in the territory. We consideration the data already concerning the area in study and diverse research to understand the evolution of the process. The approach about the geomorphological compartimentation of graben of Tacutu using techniques of the Geographic Data Sistem by means of applicatory ArcGis 9.1. that favored the construction of a digital model of the land. They were delineated the curves of levels and the nets of drainings based on letters 1:100.000, which procedure disclosed an evident control of the draining suggesting the geomorphology of the searched area is controlled for normal imperfections NE-SW and for neotectonics activities compartimentments NW, being evidenced mainly in the rivers Arraia and Tacutu, and that they are ties the process of sedimentation of the Boa Vista Formation. The geomorphological compartimentation of the area is characterized through three main compartments: the Planície Amazônica, evidenced for being a plain area wich strechs itself for bands lightly prolongated deposited for the rivers arenaceous, argillaceous and conglomerates, recent sediments unconsolidated in general associates to the deposits of the Quaternary, mainly in the Holocene, of fluvial origin; the Boa Vista Depression represented for a planing surface,formed on pre-Cambrian and Phanerozoic rocks and the Residual Plateaus, divided in: Volcanic Residual, represented for the Apoteri Domain, Residual Sedimentary represented for the Tucano Montain range and the Residual of the Proterozoic that they are remainders that demonstrate the evolution of the regional relief, probably since the installation of the followed basin of its inversion, and the dissection of these residuals throughout the cenozoics times. The evolution process of this basin sedimentary was conditional the successive occurred climatic oscillations in the region during the Quaternary, that can be observed in the lines of rocks, as well as in the draining net, and still the presence of normal and transcorrentes imperfections, characteristic these that they had corroborated for the evolutive confirmation of the neotectonic picture of the basin.Universidade Federal de RoraimaBrasilPRPPG - Pró-Reitoria de Pesquisa e Pós-GraduaçãoPRONAT - Programa de Pós-Graduação em Recursos NaturaisUFRRCosta, José Augusto Vieirahttp://lattes.cnpq.br/7630733919548304Falcão, Márcia Teixeira2020-04-23T22:48:30Z2020-04-23T22:48:30Z2007info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisFALCÃO, Márcia Teixeira. Compartimentação do relevo no hemigráben do Tacutu, Estado de Roraima. 2007. 105f. Dissertação (Mestrado em Ciências Ambientais) - Programa de Pós-Graduação em Recursos Naturais, Universidade Federal de Roraima, Boa Vista, 2007.http://repositorio.ufrr.br:8080/jspui/handle/prefix/289porinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRRinstname:Universidade Federal de Roraima (UFRR)instacron:UFRR2024-01-22T14:31:01Zoai:repositorio.ufrr.br:prefix/289Repositório InstitucionalPUBhttp://repositorio.ufrr.br:8080/oai/requestangelsenhora@gmail.comopendoar:2024-01-22T14:31:01Repositório Institucional da UFRR - Universidade Federal de Roraima (UFRR)false |
dc.title.none.fl_str_mv |
Compartimentação do relevo no hemigráben do Tacutu, Estado de Roraima |
title |
Compartimentação do relevo no hemigráben do Tacutu, Estado de Roraima |
spellingShingle |
Compartimentação do relevo no hemigráben do Tacutu, Estado de Roraima Falcão, Márcia Teixeira Geomorfologia Relevo Hemigráben Roraima Anomalias de drenagem Half-graben of the Tacutu Anomalies of draining Neotectonic control CNPQ::CIENCIAS HUMANAS::GEOGRAFIA |
title_short |
Compartimentação do relevo no hemigráben do Tacutu, Estado de Roraima |
title_full |
Compartimentação do relevo no hemigráben do Tacutu, Estado de Roraima |
title_fullStr |
Compartimentação do relevo no hemigráben do Tacutu, Estado de Roraima |
title_full_unstemmed |
Compartimentação do relevo no hemigráben do Tacutu, Estado de Roraima |
title_sort |
Compartimentação do relevo no hemigráben do Tacutu, Estado de Roraima |
author |
Falcão, Márcia Teixeira |
author_facet |
Falcão, Márcia Teixeira |
author_role |
author |
dc.contributor.none.fl_str_mv |
Costa, José Augusto Vieira http://lattes.cnpq.br/7630733919548304 |
dc.contributor.author.fl_str_mv |
Falcão, Márcia Teixeira |
dc.subject.por.fl_str_mv |
Geomorfologia Relevo Hemigráben Roraima Anomalias de drenagem Half-graben of the Tacutu Anomalies of draining Neotectonic control CNPQ::CIENCIAS HUMANAS::GEOGRAFIA |
topic |
Geomorfologia Relevo Hemigráben Roraima Anomalias de drenagem Half-graben of the Tacutu Anomalies of draining Neotectonic control CNPQ::CIENCIAS HUMANAS::GEOGRAFIA |
description |
The sedimentary basin of the Tacutu is located in the state of Roraima, Brazil. It is an implanted distensive segment in the Mesozóic (upper Jurassic - lower Cretaceo). It is an half-graben incased in the Shield of the Guianas, prolongated in the northeast direction - southwestern, with about 300 km of length varying 30 the 50 width km, extending itself of the Republic of Guyana to the capital of the state of Roraima, Boa Vista. The half-graben was implanted in a zone of reactivation of the Belt of Central Guyana. The dynamics and evolution of the relief forms are conditioned by the result of successive periods of training in which it has as influence the tectonics processes and the external agents what vary throughout the time and they can be found in the evidences of the basin Tacutu, becoming thus an atypical area in the territory. We consideration the data already concerning the area in study and diverse research to understand the evolution of the process. The approach about the geomorphological compartimentation of graben of Tacutu using techniques of the Geographic Data Sistem by means of applicatory ArcGis 9.1. that favored the construction of a digital model of the land. They were delineated the curves of levels and the nets of drainings based on letters 1:100.000, which procedure disclosed an evident control of the draining suggesting the geomorphology of the searched area is controlled for normal imperfections NE-SW and for neotectonics activities compartimentments NW, being evidenced mainly in the rivers Arraia and Tacutu, and that they are ties the process of sedimentation of the Boa Vista Formation. The geomorphological compartimentation of the area is characterized through three main compartments: the Planície Amazônica, evidenced for being a plain area wich strechs itself for bands lightly prolongated deposited for the rivers arenaceous, argillaceous and conglomerates, recent sediments unconsolidated in general associates to the deposits of the Quaternary, mainly in the Holocene, of fluvial origin; the Boa Vista Depression represented for a planing surface,formed on pre-Cambrian and Phanerozoic rocks and the Residual Plateaus, divided in: Volcanic Residual, represented for the Apoteri Domain, Residual Sedimentary represented for the Tucano Montain range and the Residual of the Proterozoic that they are remainders that demonstrate the evolution of the regional relief, probably since the installation of the followed basin of its inversion, and the dissection of these residuals throughout the cenozoics times. The evolution process of this basin sedimentary was conditional the successive occurred climatic oscillations in the region during the Quaternary, that can be observed in the lines of rocks, as well as in the draining net, and still the presence of normal and transcorrentes imperfections, characteristic these that they had corroborated for the evolutive confirmation of the neotectonic picture of the basin. |
publishDate |
2007 |
dc.date.none.fl_str_mv |
2007 2020-04-23T22:48:30Z 2020-04-23T22:48:30Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
FALCÃO, Márcia Teixeira. Compartimentação do relevo no hemigráben do Tacutu, Estado de Roraima. 2007. 105f. Dissertação (Mestrado em Ciências Ambientais) - Programa de Pós-Graduação em Recursos Naturais, Universidade Federal de Roraima, Boa Vista, 2007. http://repositorio.ufrr.br:8080/jspui/handle/prefix/289 |
identifier_str_mv |
FALCÃO, Márcia Teixeira. Compartimentação do relevo no hemigráben do Tacutu, Estado de Roraima. 2007. 105f. Dissertação (Mestrado em Ciências Ambientais) - Programa de Pós-Graduação em Recursos Naturais, Universidade Federal de Roraima, Boa Vista, 2007. |
url |
http://repositorio.ufrr.br:8080/jspui/handle/prefix/289 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Universidade Federal de Roraima Brasil PRPPG - Pró-Reitoria de Pesquisa e Pós-Graduação PRONAT - Programa de Pós-Graduação em Recursos Naturais UFRR |
publisher.none.fl_str_mv |
Universidade Federal de Roraima Brasil PRPPG - Pró-Reitoria de Pesquisa e Pós-Graduação PRONAT - Programa de Pós-Graduação em Recursos Naturais UFRR |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFRR instname:Universidade Federal de Roraima (UFRR) instacron:UFRR |
instname_str |
Universidade Federal de Roraima (UFRR) |
instacron_str |
UFRR |
institution |
UFRR |
reponame_str |
Repositório Institucional da UFRR |
collection |
Repositório Institucional da UFRR |
repository.name.fl_str_mv |
Repositório Institucional da UFRR - Universidade Federal de Roraima (UFRR) |
repository.mail.fl_str_mv |
angelsenhora@gmail.com |
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1797675185715806208 |