Lithospheric structuration onshore-offshore of the Sergipe-Alagoas passive margin, NE Brazil, based on wide-angle seismic data
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.21/9342 |
Resumo: | The structure and nature of the crust underlying the Camamu-Almada-Jequitinhonha-Sergipe-Alagoas basins System, in the NE Brazilian margin, were investigated based on the interpretation of 12 wide-angle seismic profiles acquired during the SALSA (Sergipe ALagoas Seismic Acquisition) experiment in 2014. In this work, we present two 220-km-long NW-SE combined wide-angle and reflection seismic profiles, SL 01 and SL 02, that have been acquired using 15 ocean-bottom-seismometers along each profile, offshore the southern part of the Sergipe Alagoas Basin (SAB), north of the Vaza-Barris Transfer zone. The SL 02 has a 150-km long inland continuation with 20 land-seismic-stations until the Sergipano Fold Belt (SFB). Wide-angle seismic forward modeling allows us to precisely divide the crust in three domains: beneath the continental shelf, a similar to 100 km wide necking zone is imaged where the continental crust thins from similar to 35 km on the Unthinned Continental Domain, which displays a three-layered crust structure, to less than 8 km on the Oceanic Crust Domain. In the necking zone, the upper and the middle layers thin dramatically and almost disappear, while the Moho discontinuity shows clear PmPs. The Continental-Oceanic Crust Boundary (COB) is located at similar to 80 km from the coastline and is marked by intracrustal seismic reflectors and changes in the seismic velocity, showing a sharp transition. On profile SL02, the oceanic crust is perturbed by a volcanic edifice together with an anomalous velocity zone underneath the area. |
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Lithospheric structuration onshore-offshore of the Sergipe-Alagoas passive margin, NE Brazil, based on wide-angle seismic dataSouth Atlantic oceanNE BrazilSergipe-Alagoas basinPassive marginsWide-angle refraction seismicsCrustal structureTectonic inheritanceThe structure and nature of the crust underlying the Camamu-Almada-Jequitinhonha-Sergipe-Alagoas basins System, in the NE Brazilian margin, were investigated based on the interpretation of 12 wide-angle seismic profiles acquired during the SALSA (Sergipe ALagoas Seismic Acquisition) experiment in 2014. In this work, we present two 220-km-long NW-SE combined wide-angle and reflection seismic profiles, SL 01 and SL 02, that have been acquired using 15 ocean-bottom-seismometers along each profile, offshore the southern part of the Sergipe Alagoas Basin (SAB), north of the Vaza-Barris Transfer zone. The SL 02 has a 150-km long inland continuation with 20 land-seismic-stations until the Sergipano Fold Belt (SFB). Wide-angle seismic forward modeling allows us to precisely divide the crust in three domains: beneath the continental shelf, a similar to 100 km wide necking zone is imaged where the continental crust thins from similar to 35 km on the Unthinned Continental Domain, which displays a three-layered crust structure, to less than 8 km on the Oceanic Crust Domain. In the necking zone, the upper and the middle layers thin dramatically and almost disappear, while the Moho discontinuity shows clear PmPs. The Continental-Oceanic Crust Boundary (COB) is located at similar to 80 km from the coastline and is marked by intracrustal seismic reflectors and changes in the seismic velocity, showing a sharp transition. On profile SL02, the oceanic crust is perturbed by a volcanic edifice together with an anomalous velocity zone underneath the area.ElsevierRCIPLPinheiro, J. M.Schnurle, P.Evain, MikaelAfilhado, AlexandraGallais, F.Klingelhoefer, FraukeLoureiro, AfonsoFuck, R.Soares, J.Cupertino, J. A.Viana, Adriano RoesslerRabineau, MarinaBaltzer, A.Benabdellouahed, M.Dias, NunoMoulin, MarylineAslani, D.Morvan, L.Maze, J. P.Pierre, D.Roudaut-Pitel, M.Rio, I.Alves, D.Barros, P.Biari, YoussefCorela, CarlosCrozon, J.Duarte, J. L.Ducatel, C.Falcão, C.Fernagu, P.Le Piver, D.Mokeddem, Z.Pelleau, P.Rigoti, C.Roest, W.Roudaut, M.2019-01-18T09:52:12Z2018-122018-12-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.21/9342engPINHEIRO, J. M.; [et al] – Lithospheric structuration onshore-offshore of the Sergipe-Alagoas passive margin, NE Brazil, based on wide-angle seismic data. Journal of South American Earth Sciences. ISSN 0895-9811. Vol. 88 (2018), pp. 649-6720895-981110.1016/j.jsames.2018.09.015metadata only accessinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-08-03T09:57:54Zoai:repositorio.ipl.pt:10400.21/9342Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:17:55.983722Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Lithospheric structuration onshore-offshore of the Sergipe-Alagoas passive margin, NE Brazil, based on wide-angle seismic data |
title |
Lithospheric structuration onshore-offshore of the Sergipe-Alagoas passive margin, NE Brazil, based on wide-angle seismic data |
spellingShingle |
Lithospheric structuration onshore-offshore of the Sergipe-Alagoas passive margin, NE Brazil, based on wide-angle seismic data Pinheiro, J. M. South Atlantic ocean NE Brazil Sergipe-Alagoas basin Passive margins Wide-angle refraction seismics Crustal structure Tectonic inheritance |
title_short |
Lithospheric structuration onshore-offshore of the Sergipe-Alagoas passive margin, NE Brazil, based on wide-angle seismic data |
title_full |
Lithospheric structuration onshore-offshore of the Sergipe-Alagoas passive margin, NE Brazil, based on wide-angle seismic data |
title_fullStr |
Lithospheric structuration onshore-offshore of the Sergipe-Alagoas passive margin, NE Brazil, based on wide-angle seismic data |
title_full_unstemmed |
Lithospheric structuration onshore-offshore of the Sergipe-Alagoas passive margin, NE Brazil, based on wide-angle seismic data |
title_sort |
Lithospheric structuration onshore-offshore of the Sergipe-Alagoas passive margin, NE Brazil, based on wide-angle seismic data |
author |
Pinheiro, J. M. |
author_facet |
Pinheiro, J. M. Schnurle, P. Evain, Mikael Afilhado, Alexandra Gallais, F. Klingelhoefer, Frauke Loureiro, Afonso Fuck, R. Soares, J. Cupertino, J. A. Viana, Adriano Roessler Rabineau, Marina Baltzer, A. Benabdellouahed, M. Dias, Nuno Moulin, Maryline Aslani, D. Morvan, L. Maze, J. P. Pierre, D. Roudaut-Pitel, M. Rio, I. Alves, D. Barros, P. Biari, Youssef Corela, Carlos Crozon, J. Duarte, J. L. Ducatel, C. Falcão, C. Fernagu, P. Le Piver, D. Mokeddem, Z. Pelleau, P. Rigoti, C. Roest, W. Roudaut, M. |
author_role |
author |
author2 |
Schnurle, P. Evain, Mikael Afilhado, Alexandra Gallais, F. Klingelhoefer, Frauke Loureiro, Afonso Fuck, R. Soares, J. Cupertino, J. A. Viana, Adriano Roessler Rabineau, Marina Baltzer, A. Benabdellouahed, M. Dias, Nuno Moulin, Maryline Aslani, D. Morvan, L. Maze, J. P. Pierre, D. Roudaut-Pitel, M. Rio, I. Alves, D. Barros, P. Biari, Youssef Corela, Carlos Crozon, J. Duarte, J. L. Ducatel, C. Falcão, C. Fernagu, P. Le Piver, D. Mokeddem, Z. Pelleau, P. Rigoti, C. Roest, W. Roudaut, M. |
author2_role |
author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author |
dc.contributor.none.fl_str_mv |
RCIPL |
dc.contributor.author.fl_str_mv |
Pinheiro, J. M. Schnurle, P. Evain, Mikael Afilhado, Alexandra Gallais, F. Klingelhoefer, Frauke Loureiro, Afonso Fuck, R. Soares, J. Cupertino, J. A. Viana, Adriano Roessler Rabineau, Marina Baltzer, A. Benabdellouahed, M. Dias, Nuno Moulin, Maryline Aslani, D. Morvan, L. Maze, J. P. Pierre, D. Roudaut-Pitel, M. Rio, I. Alves, D. Barros, P. Biari, Youssef Corela, Carlos Crozon, J. Duarte, J. L. Ducatel, C. Falcão, C. Fernagu, P. Le Piver, D. Mokeddem, Z. Pelleau, P. Rigoti, C. Roest, W. Roudaut, M. |
dc.subject.por.fl_str_mv |
South Atlantic ocean NE Brazil Sergipe-Alagoas basin Passive margins Wide-angle refraction seismics Crustal structure Tectonic inheritance |
topic |
South Atlantic ocean NE Brazil Sergipe-Alagoas basin Passive margins Wide-angle refraction seismics Crustal structure Tectonic inheritance |
description |
The structure and nature of the crust underlying the Camamu-Almada-Jequitinhonha-Sergipe-Alagoas basins System, in the NE Brazilian margin, were investigated based on the interpretation of 12 wide-angle seismic profiles acquired during the SALSA (Sergipe ALagoas Seismic Acquisition) experiment in 2014. In this work, we present two 220-km-long NW-SE combined wide-angle and reflection seismic profiles, SL 01 and SL 02, that have been acquired using 15 ocean-bottom-seismometers along each profile, offshore the southern part of the Sergipe Alagoas Basin (SAB), north of the Vaza-Barris Transfer zone. The SL 02 has a 150-km long inland continuation with 20 land-seismic-stations until the Sergipano Fold Belt (SFB). Wide-angle seismic forward modeling allows us to precisely divide the crust in three domains: beneath the continental shelf, a similar to 100 km wide necking zone is imaged where the continental crust thins from similar to 35 km on the Unthinned Continental Domain, which displays a three-layered crust structure, to less than 8 km on the Oceanic Crust Domain. In the necking zone, the upper and the middle layers thin dramatically and almost disappear, while the Moho discontinuity shows clear PmPs. The Continental-Oceanic Crust Boundary (COB) is located at similar to 80 km from the coastline and is marked by intracrustal seismic reflectors and changes in the seismic velocity, showing a sharp transition. On profile SL02, the oceanic crust is perturbed by a volcanic edifice together with an anomalous velocity zone underneath the area. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-12 2018-12-01T00:00:00Z 2019-01-18T09:52:12Z |
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://hdl.handle.net/10400.21/9342 |
url |
http://hdl.handle.net/10400.21/9342 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
PINHEIRO, J. M.; [et al] – Lithospheric structuration onshore-offshore of the Sergipe-Alagoas passive margin, NE Brazil, based on wide-angle seismic data. Journal of South American Earth Sciences. ISSN 0895-9811. Vol. 88 (2018), pp. 649-672 0895-9811 10.1016/j.jsames.2018.09.015 |
dc.rights.driver.fl_str_mv |
metadata only access info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
metadata only access |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799133442893414400 |