Age constraints on the Paleozoic Yaguarí-Buena vista succession from Uruguay: Paleomagnetic and paleontologic information

Autores
Ernesto, Marcia; Núñez Demarco, Pablo Andrés; Xavier, Pedro; Sanchez, Leda; Schultz, Cesar; Piñeiro, Graciela
Año de publicación
2020
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The Yaguarí and the Buena Vista formations from Uruguay are historically correlated to the Brazilian Rio do Rasto and Sanga do Cabral formations, respectively, as they have some lithostratigraphic similarities, indicating a Permo-Triassic or even Triassic age of the Yaguarí-Buena Vista succession. However, they differ in the fossil indexes that characterize the faunistic communities present in both countries. A paleomagnetic work was carried out on some sections of the Buena Vista and the Yaguarí formations, as well as on some layers of bentonites, underlying the Buena Vista sediments. The alternating field and thermal demagnetization procedures revealed both normal and reversed magnetization components, but the samples showed evidence of secondary magnetic minerals and possibly remagnetizations. The calculated paleomagnetic pole for the Yaguarí-Buena Vista Formation plots near to the poles for the Choiyoi magmatism that is believed to be responsible for the bentonite accumulation; it is also in agreement with other Permian paleomagnetic poles for South America. Based on the paleomagnetic results, the available radiometric data for the bentonites, and the fossiliferous content, a Late Permian (Lopingian) age is assigned to the Yaguarí-Buena Vista rocks.
Fil: Ernesto, Marcia. Universidade de Sao Paulo; Brasil
Fil: Núñez Demarco, Pablo Andrés. Universidad de la República. Facultad de Ciencias; Uruguay. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentina
Fil: Xavier, Pedro. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Sanchez, Leda. Universidad de la República. Facultad de Ciencias; Uruguay
Fil: Schultz, Cesar. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Piñeiro, Graciela. Universidad de la República. Facultad de Ciencias; Uruguay
Materia
LATE PALEOZOIC
PALEOMAGNETISM
PALEONTOLOGY
URUGUAY
YAGUARÍ-BUENA VISTA SUCCESSION
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/182345
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Age constraints on the Paleozoic Yaguarí-Buena vista succession from Uruguay: Paleomagnetic and paleontologic informationErnesto, MarciaNúñez Demarco, Pablo AndrésXavier, PedroSanchez, LedaSchultz, CesarPiñeiro, GracielaLATE PALEOZOICPALEOMAGNETISMPALEONTOLOGYURUGUAYYAGUARÍ-BUENA VISTA SUCCESSIONhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The Yaguarí and the Buena Vista formations from Uruguay are historically correlated to the Brazilian Rio do Rasto and Sanga do Cabral formations, respectively, as they have some lithostratigraphic similarities, indicating a Permo-Triassic or even Triassic age of the Yaguarí-Buena Vista succession. However, they differ in the fossil indexes that characterize the faunistic communities present in both countries. A paleomagnetic work was carried out on some sections of the Buena Vista and the Yaguarí formations, as well as on some layers of bentonites, underlying the Buena Vista sediments. The alternating field and thermal demagnetization procedures revealed both normal and reversed magnetization components, but the samples showed evidence of secondary magnetic minerals and possibly remagnetizations. The calculated paleomagnetic pole for the Yaguarí-Buena Vista Formation plots near to the poles for the Choiyoi magmatism that is believed to be responsible for the bentonite accumulation; it is also in agreement with other Permian paleomagnetic poles for South America. Based on the paleomagnetic results, the available radiometric data for the bentonites, and the fossiliferous content, a Late Permian (Lopingian) age is assigned to the Yaguarí-Buena Vista rocks.Fil: Ernesto, Marcia. Universidade de Sao Paulo; BrasilFil: Núñez Demarco, Pablo Andrés. Universidad de la República. Facultad de Ciencias; Uruguay. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; ArgentinaFil: Xavier, Pedro. Universidade Federal do Rio Grande do Sul; BrasilFil: Sanchez, Leda. Universidad de la República. Facultad de Ciencias; UruguayFil: Schultz, Cesar. Universidade Federal do Rio Grande do Sul; BrasilFil: Piñeiro, Graciela. Universidad de la República. Facultad de Ciencias; UruguayPergamon-Elsevier Science Ltd2020-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/182345Ernesto, Marcia; Núñez Demarco, Pablo Andrés; Xavier, Pedro; Sanchez, Leda; Schultz, Cesar; et al.; Age constraints on the Paleozoic Yaguarí-Buena vista succession from Uruguay: Paleomagnetic and paleontologic information; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 98; 102489; 3-2020; 1-130895-9811CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0895981119302809info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2019.102489info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:35:44Zoai:ri.conicet.gov.ar:11336/182345instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:35:44.916CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Age constraints on the Paleozoic Yaguarí-Buena vista succession from Uruguay: Paleomagnetic and paleontologic information
title Age constraints on the Paleozoic Yaguarí-Buena vista succession from Uruguay: Paleomagnetic and paleontologic information
spellingShingle Age constraints on the Paleozoic Yaguarí-Buena vista succession from Uruguay: Paleomagnetic and paleontologic information
Ernesto, Marcia
LATE PALEOZOIC
PALEOMAGNETISM
PALEONTOLOGY
URUGUAY
YAGUARÍ-BUENA VISTA SUCCESSION
title_short Age constraints on the Paleozoic Yaguarí-Buena vista succession from Uruguay: Paleomagnetic and paleontologic information
title_full Age constraints on the Paleozoic Yaguarí-Buena vista succession from Uruguay: Paleomagnetic and paleontologic information
title_fullStr Age constraints on the Paleozoic Yaguarí-Buena vista succession from Uruguay: Paleomagnetic and paleontologic information
title_full_unstemmed Age constraints on the Paleozoic Yaguarí-Buena vista succession from Uruguay: Paleomagnetic and paleontologic information
title_sort Age constraints on the Paleozoic Yaguarí-Buena vista succession from Uruguay: Paleomagnetic and paleontologic information
dc.creator.none.fl_str_mv Ernesto, Marcia
Núñez Demarco, Pablo Andrés
Xavier, Pedro
Sanchez, Leda
Schultz, Cesar
Piñeiro, Graciela
author Ernesto, Marcia
author_facet Ernesto, Marcia
Núñez Demarco, Pablo Andrés
Xavier, Pedro
Sanchez, Leda
Schultz, Cesar
Piñeiro, Graciela
author_role author
author2 Núñez Demarco, Pablo Andrés
Xavier, Pedro
Sanchez, Leda
Schultz, Cesar
Piñeiro, Graciela
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv LATE PALEOZOIC
PALEOMAGNETISM
PALEONTOLOGY
URUGUAY
YAGUARÍ-BUENA VISTA SUCCESSION
topic LATE PALEOZOIC
PALEOMAGNETISM
PALEONTOLOGY
URUGUAY
YAGUARÍ-BUENA VISTA SUCCESSION
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The Yaguarí and the Buena Vista formations from Uruguay are historically correlated to the Brazilian Rio do Rasto and Sanga do Cabral formations, respectively, as they have some lithostratigraphic similarities, indicating a Permo-Triassic or even Triassic age of the Yaguarí-Buena Vista succession. However, they differ in the fossil indexes that characterize the faunistic communities present in both countries. A paleomagnetic work was carried out on some sections of the Buena Vista and the Yaguarí formations, as well as on some layers of bentonites, underlying the Buena Vista sediments. The alternating field and thermal demagnetization procedures revealed both normal and reversed magnetization components, but the samples showed evidence of secondary magnetic minerals and possibly remagnetizations. The calculated paleomagnetic pole for the Yaguarí-Buena Vista Formation plots near to the poles for the Choiyoi magmatism that is believed to be responsible for the bentonite accumulation; it is also in agreement with other Permian paleomagnetic poles for South America. Based on the paleomagnetic results, the available radiometric data for the bentonites, and the fossiliferous content, a Late Permian (Lopingian) age is assigned to the Yaguarí-Buena Vista rocks.
Fil: Ernesto, Marcia. Universidade de Sao Paulo; Brasil
Fil: Núñez Demarco, Pablo Andrés. Universidad de la República. Facultad de Ciencias; Uruguay. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentina
Fil: Xavier, Pedro. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Sanchez, Leda. Universidad de la República. Facultad de Ciencias; Uruguay
Fil: Schultz, Cesar. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Piñeiro, Graciela. Universidad de la República. Facultad de Ciencias; Uruguay
description The Yaguarí and the Buena Vista formations from Uruguay are historically correlated to the Brazilian Rio do Rasto and Sanga do Cabral formations, respectively, as they have some lithostratigraphic similarities, indicating a Permo-Triassic or even Triassic age of the Yaguarí-Buena Vista succession. However, they differ in the fossil indexes that characterize the faunistic communities present in both countries. A paleomagnetic work was carried out on some sections of the Buena Vista and the Yaguarí formations, as well as on some layers of bentonites, underlying the Buena Vista sediments. The alternating field and thermal demagnetization procedures revealed both normal and reversed magnetization components, but the samples showed evidence of secondary magnetic minerals and possibly remagnetizations. The calculated paleomagnetic pole for the Yaguarí-Buena Vista Formation plots near to the poles for the Choiyoi magmatism that is believed to be responsible for the bentonite accumulation; it is also in agreement with other Permian paleomagnetic poles for South America. Based on the paleomagnetic results, the available radiometric data for the bentonites, and the fossiliferous content, a Late Permian (Lopingian) age is assigned to the Yaguarí-Buena Vista rocks.
publishDate 2020
dc.date.none.fl_str_mv 2020-03
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/182345
Ernesto, Marcia; Núñez Demarco, Pablo Andrés; Xavier, Pedro; Sanchez, Leda; Schultz, Cesar; et al.; Age constraints on the Paleozoic Yaguarí-Buena vista succession from Uruguay: Paleomagnetic and paleontologic information; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 98; 102489; 3-2020; 1-13
0895-9811
CONICET Digital
CONICET
url http://hdl.handle.net/11336/182345
identifier_str_mv Ernesto, Marcia; Núñez Demarco, Pablo Andrés; Xavier, Pedro; Sanchez, Leda; Schultz, Cesar; et al.; Age constraints on the Paleozoic Yaguarí-Buena vista succession from Uruguay: Paleomagnetic and paleontologic information; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 98; 102489; 3-2020; 1-13
0895-9811
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0895981119302809
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2019.102489
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Pergamon-Elsevier Science Ltd
publisher.none.fl_str_mv Pergamon-Elsevier Science Ltd
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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