Ocean fracture zones: their evolution and impact on tectonic and magmatism of the South and Southeast Brazilian continental margin
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , , |
Tipo de documento: | Capítulo de livro |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/B978-0-12-823988-9.00012-5 http://hdl.handle.net/11449/249146 |
Resumo: | Consideration of Mesozoic-Cenozoic tectonic and magmatic activities of the South and Southeast Brazilian continental margin shows that fracture zones (FZs) had a fundamental role in the forming the South Atlantic during the formation of the oceanic plate between the early Cretaceous and Cenozoic. FZs have the most significant morphotectonic and magmatic characteristics, identified from north to south as the Santa Helena FZ, Vitória Trindade FZ, Martin Vaz FZ, Rio de Janeiro FZ, and Rio Grande FZ. We compiled a set of geological and geophysical data, including bathymetry, gravimetry (free air, vertical gravity gradient, and geoidal), and magnetometry (magnetic and isochronous anomalies), associated with the reflection seismic from the Mid-Atlantic Ridge (its transforming characteristics) and its extensions in oceanic and continental crusts. This integration allowed an elaboration of hypotheses about the influence of mechanisms in the oceanic and continental crusts, and the influence on tectonic and magmatic segmentation in the continental margin and on the adjacent continental border beyond breakup spreading from south to north in three stages: (1) 122-125Ma, (2) 125-118Ma, and (3) 118-116Ma, physically separated by oceanic FZs. The width of the stretched and strongly intruded continental crust also showed an increase in three stages in the same direction and the same FZ. Consequently, the Continental-Oceanic Boundary showed three stages of marked changes from west to east and from south to north, resulting in margin segmentation. Rifting also spread from west to east, toward the final division, in each of these three defined segments. |
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Ocean fracture zones: their evolution and impact on tectonic and magmatism of the South and Southeast Brazilian continental marginBrazilian offshore evolutionEarth surface processesFracture zonesGeophysicsTime periodConsideration of Mesozoic-Cenozoic tectonic and magmatic activities of the South and Southeast Brazilian continental margin shows that fracture zones (FZs) had a fundamental role in the forming the South Atlantic during the formation of the oceanic plate between the early Cretaceous and Cenozoic. FZs have the most significant morphotectonic and magmatic characteristics, identified from north to south as the Santa Helena FZ, Vitória Trindade FZ, Martin Vaz FZ, Rio de Janeiro FZ, and Rio Grande FZ. We compiled a set of geological and geophysical data, including bathymetry, gravimetry (free air, vertical gravity gradient, and geoidal), and magnetometry (magnetic and isochronous anomalies), associated with the reflection seismic from the Mid-Atlantic Ridge (its transforming characteristics) and its extensions in oceanic and continental crusts. This integration allowed an elaboration of hypotheses about the influence of mechanisms in the oceanic and continental crusts, and the influence on tectonic and magmatic segmentation in the continental margin and on the adjacent continental border beyond breakup spreading from south to north in three stages: (1) 122-125Ma, (2) 125-118Ma, and (3) 118-116Ma, physically separated by oceanic FZs. The width of the stretched and strongly intruded continental crust also showed an increase in three stages in the same direction and the same FZ. Consequently, the Continental-Oceanic Boundary showed three stages of marked changes from west to east and from south to north, resulting in margin segmentation. Rifting also spread from west to east, toward the final division, in each of these three defined segments.Universidade Federal Fluminense (UFF), Rio de JaneiroEuropean Institute of the Sea/Oceanic Domain University of Western Brittany, BrestDepartamento de Mineralogia e Petrologia Ígnea Universidade do Estado do Rio de Janeiro (UERJ)Universidade do Estado Sa˜o Paulo (UNESP) Departament of Geology (DG) Institute of Geosciences and Exact Sciences (IGCE), Rio ClaroUniversidade do Estado Sa˜o Paulo (UNESP) Departament of Geology (DG) Institute of Geosciences and Exact Sciences (IGCE), Rio ClaroUniversidade Federal Fluminense (UFF)University of Western BrittanyUniversidade do Estado do Rio de Janeiro (UERJ)Universidade Estadual Paulista (UNESP)Alves, Eliane C.Araujo, Rogério S.Ramos, Edmarley C.Maia, MárciaSantos, Anderson Costa dosHackspacher, Peter Christian [UNESP]2023-07-29T14:03:40Z2023-07-29T14:03:40Z2021-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/bookPart47-94http://dx.doi.org/10.1016/B978-0-12-823988-9.00012-5Meso-Cenozoic Brazilian Offshore Magmatism: Geochemistry, Petrology, and Tectonics, p. 47-94.http://hdl.handle.net/11449/24914610.1016/B978-0-12-823988-9.00012-52-s2.0-85137916042Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMeso-Cenozoic Brazilian Offshore Magmatism: Geochemistry, Petrology, and Tectonicsinfo:eu-repo/semantics/openAccess2023-07-29T14:03:40Zoai:repositorio.unesp.br:11449/249146Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T14:34:40.822866Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Ocean fracture zones: their evolution and impact on tectonic and magmatism of the South and Southeast Brazilian continental margin |
title |
Ocean fracture zones: their evolution and impact on tectonic and magmatism of the South and Southeast Brazilian continental margin |
spellingShingle |
Ocean fracture zones: their evolution and impact on tectonic and magmatism of the South and Southeast Brazilian continental margin Alves, Eliane C. Brazilian offshore evolution Earth surface processes Fracture zones Geophysics Time period |
title_short |
Ocean fracture zones: their evolution and impact on tectonic and magmatism of the South and Southeast Brazilian continental margin |
title_full |
Ocean fracture zones: their evolution and impact on tectonic and magmatism of the South and Southeast Brazilian continental margin |
title_fullStr |
Ocean fracture zones: their evolution and impact on tectonic and magmatism of the South and Southeast Brazilian continental margin |
title_full_unstemmed |
Ocean fracture zones: their evolution and impact on tectonic and magmatism of the South and Southeast Brazilian continental margin |
title_sort |
Ocean fracture zones: their evolution and impact on tectonic and magmatism of the South and Southeast Brazilian continental margin |
author |
Alves, Eliane C. |
author_facet |
Alves, Eliane C. Araujo, Rogério S. Ramos, Edmarley C. Maia, Márcia Santos, Anderson Costa dos Hackspacher, Peter Christian [UNESP] |
author_role |
author |
author2 |
Araujo, Rogério S. Ramos, Edmarley C. Maia, Márcia Santos, Anderson Costa dos Hackspacher, Peter Christian [UNESP] |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Federal Fluminense (UFF) University of Western Brittany Universidade do Estado do Rio de Janeiro (UERJ) Universidade Estadual Paulista (UNESP) |
dc.contributor.author.fl_str_mv |
Alves, Eliane C. Araujo, Rogério S. Ramos, Edmarley C. Maia, Márcia Santos, Anderson Costa dos Hackspacher, Peter Christian [UNESP] |
dc.subject.por.fl_str_mv |
Brazilian offshore evolution Earth surface processes Fracture zones Geophysics Time period |
topic |
Brazilian offshore evolution Earth surface processes Fracture zones Geophysics Time period |
description |
Consideration of Mesozoic-Cenozoic tectonic and magmatic activities of the South and Southeast Brazilian continental margin shows that fracture zones (FZs) had a fundamental role in the forming the South Atlantic during the formation of the oceanic plate between the early Cretaceous and Cenozoic. FZs have the most significant morphotectonic and magmatic characteristics, identified from north to south as the Santa Helena FZ, Vitória Trindade FZ, Martin Vaz FZ, Rio de Janeiro FZ, and Rio Grande FZ. We compiled a set of geological and geophysical data, including bathymetry, gravimetry (free air, vertical gravity gradient, and geoidal), and magnetometry (magnetic and isochronous anomalies), associated with the reflection seismic from the Mid-Atlantic Ridge (its transforming characteristics) and its extensions in oceanic and continental crusts. This integration allowed an elaboration of hypotheses about the influence of mechanisms in the oceanic and continental crusts, and the influence on tectonic and magmatic segmentation in the continental margin and on the adjacent continental border beyond breakup spreading from south to north in three stages: (1) 122-125Ma, (2) 125-118Ma, and (3) 118-116Ma, physically separated by oceanic FZs. The width of the stretched and strongly intruded continental crust also showed an increase in three stages in the same direction and the same FZ. Consequently, the Continental-Oceanic Boundary showed three stages of marked changes from west to east and from south to north, resulting in margin segmentation. Rifting also spread from west to east, toward the final division, in each of these three defined segments. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-01-01 2023-07-29T14:03:40Z 2023-07-29T14:03:40Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/bookPart |
format |
bookPart |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/B978-0-12-823988-9.00012-5 Meso-Cenozoic Brazilian Offshore Magmatism: Geochemistry, Petrology, and Tectonics, p. 47-94. http://hdl.handle.net/11449/249146 10.1016/B978-0-12-823988-9.00012-5 2-s2.0-85137916042 |
url |
http://dx.doi.org/10.1016/B978-0-12-823988-9.00012-5 http://hdl.handle.net/11449/249146 |
identifier_str_mv |
Meso-Cenozoic Brazilian Offshore Magmatism: Geochemistry, Petrology, and Tectonics, p. 47-94. 10.1016/B978-0-12-823988-9.00012-5 2-s2.0-85137916042 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Meso-Cenozoic Brazilian Offshore Magmatism: Geochemistry, Petrology, and Tectonics |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
47-94 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
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1808128380715925504 |