The narrow, shallow, low-accommodation shelf of central Brazil: sedimentology, evolution, and human uses

Detalhes bibliográficos
Autor(a) principal: Dominguez, José Maria Landim
Data de Publicação: 2013
Outros Autores: Silva, Rian Pereira da, Nunes, Alina Sá, Freire, Antonio Fernando Menezes
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://repositorio.ufba.br/ri/handle/ri/15861
Resumo: Texto completo: acesso restrito. p. 46–59
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spelling Dominguez, José Maria LandimSilva, Rian Pereira daNunes, Alina SáFreire, Antonio Fernando MenezesDominguez, José Maria LandimSilva, Rian Pereira daNunes, Alina SáFreire, Antonio Fernando Menezes2014-09-09T14:20:10Z20130169-555Xhttp://repositorio.ufba.br/ri/handle/ri/15861v. 203Texto completo: acesso restrito. p. 46–59The continental shelf off the coast of central Brazil, extending from 10 to 16°S, is unusually narrow (~ 20 km) and rests on the São Francisco craton. The shelf break is located between the 45 and 50 m isobaths and coincides with major hinge-lines of the marginal basins. The shelf was exposed for most of the Quaternary period, particularly during the last 1 my, when the average sea level was − 62 m. Submarine geomorphology is strongly influenced by this extended sub-aerial exposure and reduced subsidence, resulting in widespread incisions on the shelf. During the limited episodes of shelf inundation, as is the case today, a few meters of non-framework grain assemblages dominated by coralline algae accumulated on the outer shelf, while quartz sands were restricted to water depths of less than 10–15 m. Mud accumulation on this unusually shallow shelf is aided by additional accommodation space provided by incisions and canyon heads indenting the shelf. Artisanal fisheries, targeting high-value commercial species associated with hard bottoms located on the outer shelf and shelf break, are the most important human use of this shelf. Data used in this study have been compiled from theses and previously conducted surveys and consist of four piston cores, 509 km of chirp subbottom profiles and side scan recordings, and 711 bottom grab samples that have been analyzed for various textural and compositional aspects.Submitted by Suelen Reis (suziy.ellen@gmail.com) on 2014-03-27T13:43:03Z No. of bitstreams: 1 1-s2.0-S0169555X13003528-main.pdf: 4821067 bytes, checksum: 342829561b0953012930cae89304ca78 (MD5)Approved for entry into archive by Rodrigo Meirelles (rodrigomei@ufba.br) on 2014-09-09T14:20:10Z (GMT) No. of bitstreams: 1 1-s2.0-S0169555X13003528-main.pdf: 4821067 bytes, checksum: 342829561b0953012930cae89304ca78 (MD5)Made available in DSpace on 2014-09-09T14:20:10Z (GMT). No. of bitstreams: 1 1-s2.0-S0169555X13003528-main.pdf: 4821067 bytes, checksum: 342829561b0953012930cae89304ca78 (MD5) Previous issue date: 2013http://dx.doi.org/10.1016/j.geomorph.2013.07.004reponame:Repositório Institucional da UFBAinstname:Universidade Federal da Bahia (UFBA)instacron:UFBAForamolRhodoalgalNarrow shelfEastern BrazilIncised valleysMud depocentersThe narrow, shallow, low-accommodation shelf of central Brazil: sedimentology, evolution, and human usesGeomorphologyinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article10000-01-01info:eu-repo/semantics/openAccessengORIGINAL1-s2.0-S0169555X13003528-main.pdf1-s2.0-S0169555X13003528-main.pdfapplication/pdf4821067https://repositorio.ufba.br/bitstream/ri/15861/1/1-s2.0-S0169555X13003528-main.pdf342829561b0953012930cae89304ca78MD51LICENSElicense.txtlicense.txttext/plain1345https://repositorio.ufba.br/bitstream/ri/15861/2/license.txt0d4b811ef71182510d2015daa7c8a900MD52TEXT1-s2.0-S0169555X13003528-main.pdf.txt1-s2.0-S0169555X13003528-main.pdf.txtExtracted texttext/plain51324https://repositorio.ufba.br/bitstream/ri/15861/3/1-s2.0-S0169555X13003528-main.pdf.txtdbb9579d4ed6e85d7743789e7e9dfac8MD53ri/158612022-07-05 14:03:31.96oai:repositorio.ufba.br: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Repositório InstitucionalPUBhttp://192.188.11.11:8080/oai/requestopendoar:19322022-07-05T17:03:31Repositório Institucional da UFBA - Universidade Federal da Bahia (UFBA)false
dc.title.pt_BR.fl_str_mv The narrow, shallow, low-accommodation shelf of central Brazil: sedimentology, evolution, and human uses
dc.title.alternative.pt_BR.fl_str_mv Geomorphology
title The narrow, shallow, low-accommodation shelf of central Brazil: sedimentology, evolution, and human uses
spellingShingle The narrow, shallow, low-accommodation shelf of central Brazil: sedimentology, evolution, and human uses
Dominguez, José Maria Landim
Foramol
Rhodoalgal
Narrow shelf
Eastern Brazil
Incised valleys
Mud depocenters
title_short The narrow, shallow, low-accommodation shelf of central Brazil: sedimentology, evolution, and human uses
title_full The narrow, shallow, low-accommodation shelf of central Brazil: sedimentology, evolution, and human uses
title_fullStr The narrow, shallow, low-accommodation shelf of central Brazil: sedimentology, evolution, and human uses
title_full_unstemmed The narrow, shallow, low-accommodation shelf of central Brazil: sedimentology, evolution, and human uses
title_sort The narrow, shallow, low-accommodation shelf of central Brazil: sedimentology, evolution, and human uses
author Dominguez, José Maria Landim
author_facet Dominguez, José Maria Landim
Silva, Rian Pereira da
Nunes, Alina Sá
Freire, Antonio Fernando Menezes
author_role author
author2 Silva, Rian Pereira da
Nunes, Alina Sá
Freire, Antonio Fernando Menezes
author2_role author
author
author
dc.contributor.author.fl_str_mv Dominguez, José Maria Landim
Silva, Rian Pereira da
Nunes, Alina Sá
Freire, Antonio Fernando Menezes
Dominguez, José Maria Landim
Silva, Rian Pereira da
Nunes, Alina Sá
Freire, Antonio Fernando Menezes
dc.subject.por.fl_str_mv Foramol
Rhodoalgal
Narrow shelf
Eastern Brazil
Incised valleys
Mud depocenters
topic Foramol
Rhodoalgal
Narrow shelf
Eastern Brazil
Incised valleys
Mud depocenters
description Texto completo: acesso restrito. p. 46–59
publishDate 2013
dc.date.issued.fl_str_mv 2013
dc.date.accessioned.fl_str_mv 2014-09-09T14:20:10Z
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.uri.fl_str_mv http://repositorio.ufba.br/ri/handle/ri/15861
dc.identifier.issn.none.fl_str_mv 0169-555X
dc.identifier.number.pt_BR.fl_str_mv v. 203
identifier_str_mv 0169-555X
v. 203
url http://repositorio.ufba.br/ri/handle/ri/15861
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.source.pt_BR.fl_str_mv http://dx.doi.org/10.1016/j.geomorph.2013.07.004
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFBA
instname:Universidade Federal da Bahia (UFBA)
instacron:UFBA
instname_str Universidade Federal da Bahia (UFBA)
instacron_str UFBA
institution UFBA
reponame_str Repositório Institucional da UFBA
collection Repositório Institucional da UFBA
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