The endorheic – Exorheic transition and later stage of fluvial incision in a wet tropical margin setting: The Atlantic draining Paraíba do Sul River basin (Brazil)

Detalhes bibliográficos
Autor(a) principal: Freitas, Marcelo
Data de Publicação: 2022
Outros Autores: Paixão, Rodrigo, Salgado, André, Silva, Luis, Cunha, Pedro, Gomes, Alberto, Martins, António, Almeida, Júlio, Tupinamba, Miguel, Dantas, Marcelo
Tipo de documento: Artigo
Idioma: por
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10174/33443
https://doi.org/10.1016/j.jsames.2022.103742
Resumo: Present-day endorheic drainage systems are rare in tropical humid regions and/or close to the coast. During the late Cenozoic, under a humid tropical climate, the Paraíba do Sul River basin (SE Brazil) has developed along the South America passive margin. This basin currently drains into the South Atlantic Ocean, but it preserves landforms that are indicative of previous endorheic paleodrainage. This study examines the possibility that this region was endorheic for most of the Neogene, prior to the establishment of the present-day drainage to the Atlantic and discusses the transition from an endorheic to an exorheic system. Data was obtained through analysis of geomorphological features identified by remote-sensing techniques and verified by fieldwork, as well as the interpretation of landscape evolution models elaborated by the Seppômen method. Five drainage convergence areas and possible endorheic paleobasins, previous to the Quaternary (or to the Pliocene) have been identified within the present-day Paraíba do Sul River basin. Each area is associated with a Cenozoic graben and is separated by structural highs which would have formed paleodrainage divides. The mechanism for the transition endorheic-exorheic is the overspill, the inland regressive erosion or, more probable, a combination between these two processes. In fact, these two processes often occur concomitantly and both contribute to the same result: the expansion of an exorheic basin by the incision of a permanent channel into the endorheic basin infill. The geological evolution of the ancestral Paraíba do Sul River, draining to the Atlantic Ocean, was later strongly controlled by the very low sea levels during the Quaternary which determined the stage of fluvial incision. No numerical dating has been yet obtained for the proposed endorheic-exorheic transition; nonetheless, published regional denudation rates suggest that this transition occurred sometime in the interval between 21 and 5 Ma (Miocene to Pliocene). This transition was controlled by a previous decrease in subsidence within the aforementioned grabens and by a much wetter climate that promoted overspill and connection to the Atlantic.
id RCAP_fb48ebf4bcf6634685a4a0f6f6c1c8ff
oai_identifier_str oai:dspace.uevora.pt:10174/33443
network_acronym_str RCAP
network_name_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository_id_str 7160
spelling The endorheic – Exorheic transition and later stage of fluvial incision in a wet tropical margin setting: The Atlantic draining Paraíba do Sul River basin (Brazil)Long-term evolutionQuaternaryContinental rift of SE BrazilDrainage rearrangementsPresent-day endorheic drainage systems are rare in tropical humid regions and/or close to the coast. During the late Cenozoic, under a humid tropical climate, the Paraíba do Sul River basin (SE Brazil) has developed along the South America passive margin. This basin currently drains into the South Atlantic Ocean, but it preserves landforms that are indicative of previous endorheic paleodrainage. This study examines the possibility that this region was endorheic for most of the Neogene, prior to the establishment of the present-day drainage to the Atlantic and discusses the transition from an endorheic to an exorheic system. Data was obtained through analysis of geomorphological features identified by remote-sensing techniques and verified by fieldwork, as well as the interpretation of landscape evolution models elaborated by the Seppômen method. Five drainage convergence areas and possible endorheic paleobasins, previous to the Quaternary (or to the Pliocene) have been identified within the present-day Paraíba do Sul River basin. Each area is associated with a Cenozoic graben and is separated by structural highs which would have formed paleodrainage divides. The mechanism for the transition endorheic-exorheic is the overspill, the inland regressive erosion or, more probable, a combination between these two processes. In fact, these two processes often occur concomitantly and both contribute to the same result: the expansion of an exorheic basin by the incision of a permanent channel into the endorheic basin infill. The geological evolution of the ancestral Paraíba do Sul River, draining to the Atlantic Ocean, was later strongly controlled by the very low sea levels during the Quaternary which determined the stage of fluvial incision. No numerical dating has been yet obtained for the proposed endorheic-exorheic transition; nonetheless, published regional denudation rates suggest that this transition occurred sometime in the interval between 21 and 5 Ma (Miocene to Pliocene). This transition was controlled by a previous decrease in subsidence within the aforementioned grabens and by a much wetter climate that promoted overspill and connection to the Atlantic.2023-01-16T15:48:26Z2023-01-162022-04-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10174/33443https://doi.org/10.1016/j.jsames.2022.103742https://doi.org/10.1016/j.jsames.2022.103742http://hdl.handle.net/10174/33443pormarcelomotta@puc-rio.brrodrigowpp1@gmail.comaarsalgadoufmg@gmail.comlgeirado@gmail.compcunha@dct.uc.ptalbgomes@gmail.comaam@uevora.ptjchalmeida@gmail.comtupinambamiguel@gmail.commarcelo.dantas@cprm.gov.br247Freitas, MarceloPaixão, RodrigoSalgado, AndréSilva, LuisCunha, PedroGomes, AlbertoMartins, AntónioAlmeida, JúlioTupinamba, MiguelDantas, Marceloinfo: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:RCAAP2024-01-03T19:35:20Zoai:dspace.uevora.pt:10174/33443Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:22:17.921169Repositório 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 The endorheic – Exorheic transition and later stage of fluvial incision in a wet tropical margin setting: The Atlantic draining Paraíba do Sul River basin (Brazil)
title The endorheic – Exorheic transition and later stage of fluvial incision in a wet tropical margin setting: The Atlantic draining Paraíba do Sul River basin (Brazil)
spellingShingle The endorheic – Exorheic transition and later stage of fluvial incision in a wet tropical margin setting: The Atlantic draining Paraíba do Sul River basin (Brazil)
Freitas, Marcelo
Long-term evolution
Quaternary
Continental rift of SE Brazil
Drainage rearrangements
title_short The endorheic – Exorheic transition and later stage of fluvial incision in a wet tropical margin setting: The Atlantic draining Paraíba do Sul River basin (Brazil)
title_full The endorheic – Exorheic transition and later stage of fluvial incision in a wet tropical margin setting: The Atlantic draining Paraíba do Sul River basin (Brazil)
title_fullStr The endorheic – Exorheic transition and later stage of fluvial incision in a wet tropical margin setting: The Atlantic draining Paraíba do Sul River basin (Brazil)
title_full_unstemmed The endorheic – Exorheic transition and later stage of fluvial incision in a wet tropical margin setting: The Atlantic draining Paraíba do Sul River basin (Brazil)
title_sort The endorheic – Exorheic transition and later stage of fluvial incision in a wet tropical margin setting: The Atlantic draining Paraíba do Sul River basin (Brazil)
author Freitas, Marcelo
author_facet Freitas, Marcelo
Paixão, Rodrigo
Salgado, André
Silva, Luis
Cunha, Pedro
Gomes, Alberto
Martins, António
Almeida, Júlio
Tupinamba, Miguel
Dantas, Marcelo
author_role author
author2 Paixão, Rodrigo
Salgado, André
Silva, Luis
Cunha, Pedro
Gomes, Alberto
Martins, António
Almeida, Júlio
Tupinamba, Miguel
Dantas, Marcelo
author2_role author
author
author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Freitas, Marcelo
Paixão, Rodrigo
Salgado, André
Silva, Luis
Cunha, Pedro
Gomes, Alberto
Martins, António
Almeida, Júlio
Tupinamba, Miguel
Dantas, Marcelo
dc.subject.por.fl_str_mv Long-term evolution
Quaternary
Continental rift of SE Brazil
Drainage rearrangements
topic Long-term evolution
Quaternary
Continental rift of SE Brazil
Drainage rearrangements
description Present-day endorheic drainage systems are rare in tropical humid regions and/or close to the coast. During the late Cenozoic, under a humid tropical climate, the Paraíba do Sul River basin (SE Brazil) has developed along the South America passive margin. This basin currently drains into the South Atlantic Ocean, but it preserves landforms that are indicative of previous endorheic paleodrainage. This study examines the possibility that this region was endorheic for most of the Neogene, prior to the establishment of the present-day drainage to the Atlantic and discusses the transition from an endorheic to an exorheic system. Data was obtained through analysis of geomorphological features identified by remote-sensing techniques and verified by fieldwork, as well as the interpretation of landscape evolution models elaborated by the Seppômen method. Five drainage convergence areas and possible endorheic paleobasins, previous to the Quaternary (or to the Pliocene) have been identified within the present-day Paraíba do Sul River basin. Each area is associated with a Cenozoic graben and is separated by structural highs which would have formed paleodrainage divides. The mechanism for the transition endorheic-exorheic is the overspill, the inland regressive erosion or, more probable, a combination between these two processes. In fact, these two processes often occur concomitantly and both contribute to the same result: the expansion of an exorheic basin by the incision of a permanent channel into the endorheic basin infill. The geological evolution of the ancestral Paraíba do Sul River, draining to the Atlantic Ocean, was later strongly controlled by the very low sea levels during the Quaternary which determined the stage of fluvial incision. No numerical dating has been yet obtained for the proposed endorheic-exorheic transition; nonetheless, published regional denudation rates suggest that this transition occurred sometime in the interval between 21 and 5 Ma (Miocene to Pliocene). This transition was controlled by a previous decrease in subsidence within the aforementioned grabens and by a much wetter climate that promoted overspill and connection to the Atlantic.
publishDate 2022
dc.date.none.fl_str_mv 2022-04-01T00:00:00Z
2023-01-16T15:48:26Z
2023-01-16
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/10174/33443
https://doi.org/10.1016/j.jsames.2022.103742
https://doi.org/10.1016/j.jsames.2022.103742
http://hdl.handle.net/10174/33443
url http://hdl.handle.net/10174/33443
https://doi.org/10.1016/j.jsames.2022.103742
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv marcelomotta@puc-rio.br
rodrigowpp1@gmail.com
aarsalgadoufmg@gmail.com
lgeirado@gmail.com
pcunha@dct.uc.pt
albgomes@gmail.com
aam@uevora.pt
jchalmeida@gmail.com
tupinambamiguel@gmail.com
marcelo.dantas@cprm.gov.br
247
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
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
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection 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
repository.mail.fl_str_mv
_version_ 1799136704764837888