Transgressive deposits and morphological patterns in the equatorial Atlantic shallow shelf (Northeast Brazil)

The aim of this work is to identify and characterize the Late Quaternary morphological patterns of the west coast of the Ceará shelf, Northeast Brazil, based on Landsat 8, sedimentology, and seismic data. The shallow shelf has three regions: the Acaraú high (AH), unconsolidated floor (UF), and Itapa...

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Detalhes bibliográficos
Autores: Ximenes Neto, Antônio Rodrigues, Morais, Jáder Onofre de, Paula, Luciano Filho Sousa de, Pinheiro, Lidriana de Souza
Tipo de documento: artigo
Estado:Versão publicada
Data de publicação:2018
País:Brasil
Recursos:Universidade Federal do Ceará (UFC)
Repositório:Repositório Institucional da Universidade Federal do Ceará (UFC)
Idioma:inglês
OAI Identifier:oai:repositorio.ufc.br:riufc/72596
Acesso em linha:http://www.repositorio.ufc.br/handle/riufc/72596
Access Level:Acceso aberto
Palavra-chave:Submarine geomorphology
Continental shelf
Sea-level change
Geomorfologia subamrina
Bacia continetal
Nível do mar - Mudanças
id BR_9acbebbf4e034cce1c84130889a096b3
oai_identifier_str oai:repositorio.ufc.br:riufc/72596
network_acronym_str BR
network_name_str Brasil
repository_id_str
dc.title.pt_BR.fl_str_mv Transgressive deposits and morphological patterns in the equatorial Atlantic shallow shelf (Northeast Brazil)
title Transgressive deposits and morphological patterns in the equatorial Atlantic shallow shelf (Northeast Brazil)
spellingShingle Transgressive deposits and morphological patterns in the equatorial Atlantic shallow shelf (Northeast Brazil)
Ximenes Neto, Antônio Rodrigues
Submarine geomorphology
Continental shelf
Sea-level change
Geomorfologia subamrina
Bacia continetal
Nível do mar - Mudanças
title_short Transgressive deposits and morphological patterns in the equatorial Atlantic shallow shelf (Northeast Brazil)
title_full Transgressive deposits and morphological patterns in the equatorial Atlantic shallow shelf (Northeast Brazil)
title_fullStr Transgressive deposits and morphological patterns in the equatorial Atlantic shallow shelf (Northeast Brazil)
title_full_unstemmed Transgressive deposits and morphological patterns in the equatorial Atlantic shallow shelf (Northeast Brazil)
title_sort Transgressive deposits and morphological patterns in the equatorial Atlantic shallow shelf (Northeast Brazil)
dc.creator.none.fl_str_mv Ximenes Neto, Antônio Rodrigues
Morais, Jáder Onofre de
Paula, Luciano Filho Sousa de
Pinheiro, Lidriana de Souza
author Ximenes Neto, Antônio Rodrigues
author_facet Ximenes Neto, Antônio Rodrigues
Morais, Jáder Onofre de
Paula, Luciano Filho Sousa de
Pinheiro, Lidriana de Souza
author_role author
author2 Morais, Jáder Onofre de
Paula, Luciano Filho Sousa de
Pinheiro, Lidriana de Souza
author2_role author
author
author
dc.subject.por.fl_str_mv Submarine geomorphology
Continental shelf
Sea-level change
Geomorfologia subamrina
Bacia continetal
Nível do mar - Mudanças
topic Submarine geomorphology
Continental shelf
Sea-level change
Geomorfologia subamrina
Bacia continetal
Nível do mar - Mudanças
description The aim of this work is to identify and characterize the Late Quaternary morphological patterns of the west coast of the Ceará shelf, Northeast Brazil, based on Landsat 8, sedimentology, and seismic data. The shallow shelf has three regions: the Acaraú high (AH), unconsolidated floor (UF), and Itapagé bank (IB). The AH occurs in the inner shelf (0–5 m water depth) and shows various bedforms and in part a rocky bottom. The UF (>5 m) has many subaqueous dunes with bioclastics, structures for catching lobsters, and an escarpment. The IB is an extensive feature (delimited by the 20-m isobath) with large dunes and a shipwreck. Three seismic boundaries were identified as follows: transgressive surface (TS), subaerial exposure (SE), and miscellaneous surface (MS = TS + SE). Four seismic units were defined as follows: U1 — transparent facies with low amplitude, underlying the SE; U2 — chaotic to parallel facies with moderate to high amplitude, overlying the SE and underlying the TS; U3 — chaotic facies above the SE or TS and below the TS or sea floor, with the largest spatial extension; U4 — periodically occurring chaotic facies above the TS and below the seafloor. U1 is probably related to the falling stage systems tract or previous highstand systems tract. U2 and U3 belong to the transgressive systems tracts and U4 is associated with bedforms of the highstand systems tract. Ancient topography favored the development of transgressive deposits and modern bedforms. The AH, escarpment, and IB are morphostructures influenced by Acaraú subbasin faults. The inner shelf is characterized by shallow geomorphology strongly influenced by structural inheritance (Precambrian and post-breakup of Pangea), bedrock control, and the Holocene transgressive systems tract (the largest thickness occurs with subaqueous dunes).
publishDate 2018
dc.date.issued.fl_str_mv 2018
dc.date.accessioned.fl_str_mv 2023-05-30T16:27:52Z
dc.date.available.fl_str_mv 2023-05-30T16:27:52Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.citation.fl_str_mv XIMENES NETO, Antonio Rodrigues; MORAIS, Jáder Onofre de; PAULA, Luciano Filho Sousa de; PINHEIRO, Lidriana de Souza. Transgressive deposits and morphological patterns in the equatorial Atlantic shallow shelf (Northeast Brazil). Regional Studies In Marine Science, Netherlands, v. 24, p. 212-224, 2018. Disponível em: https://doi.org/10.1016/j.rsma.2018.08.015. Acesso em: 30 maio 2023.
dc.identifier.uri.fl_str_mv http://www.repositorio.ufc.br/handle/riufc/72596
dc.identifier.issn.none.fl_str_mv 2352-4855
identifier_str_mv XIMENES NETO, Antonio Rodrigues; MORAIS, Jáder Onofre de; PAULA, Luciano Filho Sousa de; PINHEIRO, Lidriana de Souza. Transgressive deposits and morphological patterns in the equatorial Atlantic shallow shelf (Northeast Brazil). Regional Studies In Marine Science, Netherlands, v. 24, p. 212-224, 2018. Disponível em: https://doi.org/10.1016/j.rsma.2018.08.015. Acesso em: 30 maio 2023.
2352-4855
url http://www.repositorio.ufc.br/handle/riufc/72596
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Regional Studies In Marine Science
publisher.none.fl_str_mv Regional Studies In Marine Science
dc.source.none.fl_str_mv reponame:Repositório Institucional da Universidade Federal do Ceará (UFC)
instname:Universidade Federal do Ceará (UFC)
instacron:UFC
instname_str Universidade Federal do Ceará (UFC)
instacron_str UFC
institution UFC
reponame_str Repositório Institucional da Universidade Federal do Ceará (UFC)
collection Repositório Institucional da Universidade Federal do Ceará (UFC)
bitstream.url.fl_str_mv http://repositorio.ufc.br/bitstream/riufc/72596/2/license.txt
http://repositorio.ufc.br/bitstream/riufc/72596/1/2018_art_arxneto.pdf
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repository.name.fl_str_mv Repositório Institucional da Universidade Federal do Ceará (UFC) - Universidade Federal do Ceará (UFC)
repository.mail.fl_str_mv bu@ufc.br || repositorio@ufc.br
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spelling 2023-05-30T16:27:52Z2023-05-30T16:27:52Z2018XIMENES NETO, Antonio Rodrigues; MORAIS, Jáder Onofre de; PAULA, Luciano Filho Sousa de; PINHEIRO, Lidriana de Souza. Transgressive deposits and morphological patterns in the equatorial Atlantic shallow shelf (Northeast Brazil). Regional Studies In Marine Science, Netherlands, v. 24, p. 212-224, 2018. Disponível em: https://doi.org/10.1016/j.rsma.2018.08.015. Acesso em: 30 maio 2023.2352-4855http://www.repositorio.ufc.br/handle/riufc/72596The aim of this work is to identify and characterize the Late Quaternary morphological patterns of the west coast of the Ceará shelf, Northeast Brazil, based on Landsat 8, sedimentology, and seismic data. The shallow shelf has three regions: the Acaraú high (AH), unconsolidated floor (UF), and Itapagé bank (IB). The AH occurs in the inner shelf (0–5 m water depth) and shows various bedforms and in part a rocky bottom. The UF (>5 m) has many subaqueous dunes with bioclastics, structures for catching lobsters, and an escarpment. The IB is an extensive feature (delimited by the 20-m isobath) with large dunes and a shipwreck. Three seismic boundaries were identified as follows: transgressive surface (TS), subaerial exposure (SE), and miscellaneous surface (MS = TS + SE). Four seismic units were defined as follows: U1 — transparent facies with low amplitude, underlying the SE; U2 — chaotic to parallel facies with moderate to high amplitude, overlying the SE and underlying the TS; U3 — chaotic facies above the SE or TS and below the TS or sea floor, with the largest spatial extension; U4 — periodically occurring chaotic facies above the TS and below the seafloor. U1 is probably related to the falling stage systems tract or previous highstand systems tract. U2 and U3 belong to the transgressive systems tracts and U4 is associated with bedforms of the highstand systems tract. Ancient topography favored the development of transgressive deposits and modern bedforms. The AH, escarpment, and IB are morphostructures influenced by Acaraú subbasin faults. The inner shelf is characterized by shallow geomorphology strongly influenced by structural inheritance (Precambrian and post-breakup of Pangea), bedrock control, and the Holocene transgressive systems tract (the largest thickness occurs with subaqueous dunes).Regional Studies In Marine ScienceSubmarine geomorphologyContinental shelfSea-level changeGeomorfologia subamrinaBacia continetalNível do mar - MudançasTransgressive deposits and morphological patterns in the equatorial Atlantic shallow shelf (Northeast Brazil)info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleengreponame:Repositório Institucional da Universidade Federal do Ceará (UFC)instname:Universidade Federal do Ceará (UFC)instacron:UFCinfo:eu-repo/semantics/openAccessXimenes Neto, Antônio RodriguesMorais, Jáder Onofre dePaula, Luciano Filho Sousa dePinheiro, Lidriana de SouzaLICENSElicense.txtlicense.txttext/plain; charset=utf-81748http://repositorio.ufc.br/bitstream/riufc/72596/2/license.txt8a4605be74aa9ea9d79846c1fba20a33MD52ORIGINAL2018_art_arxneto.pdf2018_art_arxneto.pdfapplication/pdf6380906http://repositorio.ufc.br/bitstream/riufc/72596/1/2018_art_arxneto.pdf95ef1026c8e9e3d7d9b498de11c67f8eMD51riufc/725962023-05-30 13:27:52.551oai:repositorio.ufc.br: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Repositório InstitucionalPUBhttp://www.repositorio.ufc.br/ri-oai/requestbu@ufc.br || repositorio@ufc.bropendoar:2023-05-30T16:27:52Repositório Institucional da Universidade Federal do Ceará (UFC) - Universidade Federal do Ceará (UFC)false
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