Basement evolution of the Sierra de la Ventana Fold Belt: New evidence for Cambrian continental rifting along the southern margin of Gondwana
- Autores
- Rapela, Carlos Washington; Pankhurst, R. J.; Fanning, C. M.; Grecco, Laura Edith
- Año de publicación
- 2003
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- U-Pb sensitive high-resolution ion microprobe data together with geochemical and Nd isotope analyses obtained in the basement complex of the Sierra de la Ventana Fold Belt indicate that the Early Palaeozoic passive margin history of the basin followed Cambrian magmatism related to rifting in a 600 Ma Neoproterozoic crust. The Cambrian episode started with intrusion of 531 ± 4 and 524 ± 5 Ma A- and I-type granites derived from a dehydrated infracrustal source (cNd530 - 3.1 to -5.9), and culminated with eruption of high-Zr peralkaline spherulitic rhyolites derived from an undepleted lithospheric mantle (509 ± 5 Ma; cNd509 +0.5 to +1.0). These rift-related magmatic rocks were covered by shelf sediments deposited along a once-continuous passive margin, encompassing the Sierra de la Ventana Fold Belt, the Cape Fold Belt, the Falkland/Malvinas microplate and the Ellsworth Mountains block in Antarctica. The Cambrian rifting event defined the outline shape of the southern part of Gondwana, and can be regarded as the initiation of the supercontinent stage, which lasted until Jurassic break-up. The conjugate continental fragments separated from Gondwana during the Cambrian rifting could be the source for microcontinents with c. 1000 Ma basement rocks that collided with the proto-Andean margin during Ordovician-Silurian times.
Fil: Rapela, Carlos Washington. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
Fil: Pankhurst, R. J.. British Antartic Survey; Reino Unido. NERC Isotope Geosciences Laboratory; Reino Unido
Fil: Fanning, C. M.. The Australian National University; Australia
Fil: Grecco, Laura Edith. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Geológico del Sur. Universidad Nacional del Sur. Departamento de Geología. Instituto Geológico del Sur; Argentina - Materia
-
Geochronology
Gondwana
Granites
Rifting
U-Pb Shrimp - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/78126
Ver los metadatos del registro completo
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spelling |
Basement evolution of the Sierra de la Ventana Fold Belt: New evidence for Cambrian continental rifting along the southern margin of GondwanaRapela, Carlos WashingtonPankhurst, R. J.Fanning, C. M.Grecco, Laura EdithGeochronologyGondwanaGranitesRiftingU-Pb Shrimphttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1U-Pb sensitive high-resolution ion microprobe data together with geochemical and Nd isotope analyses obtained in the basement complex of the Sierra de la Ventana Fold Belt indicate that the Early Palaeozoic passive margin history of the basin followed Cambrian magmatism related to rifting in a 600 Ma Neoproterozoic crust. The Cambrian episode started with intrusion of 531 ± 4 and 524 ± 5 Ma A- and I-type granites derived from a dehydrated infracrustal source (cNd530 - 3.1 to -5.9), and culminated with eruption of high-Zr peralkaline spherulitic rhyolites derived from an undepleted lithospheric mantle (509 ± 5 Ma; cNd509 +0.5 to +1.0). These rift-related magmatic rocks were covered by shelf sediments deposited along a once-continuous passive margin, encompassing the Sierra de la Ventana Fold Belt, the Cape Fold Belt, the Falkland/Malvinas microplate and the Ellsworth Mountains block in Antarctica. The Cambrian rifting event defined the outline shape of the southern part of Gondwana, and can be regarded as the initiation of the supercontinent stage, which lasted until Jurassic break-up. The conjugate continental fragments separated from Gondwana during the Cambrian rifting could be the source for microcontinents with c. 1000 Ma basement rocks that collided with the proto-Andean margin during Ordovician-Silurian times.Fil: Rapela, Carlos Washington. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; ArgentinaFil: Pankhurst, R. J.. British Antartic Survey; Reino Unido. NERC Isotope Geosciences Laboratory; Reino UnidoFil: Fanning, C. M.. The Australian National University; AustraliaFil: Grecco, Laura Edith. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Geológico del Sur. Universidad Nacional del Sur. Departamento de Geología. Instituto Geológico del Sur; ArgentinaGeological Society Publications House2003-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/78126Rapela, Carlos Washington; Pankhurst, R. J.; Fanning, C. M.; Grecco, Laura Edith; Basement evolution of the Sierra de la Ventana Fold Belt: New evidence for Cambrian continental rifting along the southern margin of Gondwana; Geological Society Publications House; Journal of the Geological Society; 160; 4; 7-2003; 613-6280016-7649CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://jgs.lyellcollection.org/content/160/4/613info:eu-repo/semantics/altIdentifier/url/https://pubs.geoscienceworld.org/jgs/article-lookup?doi=10.1144/0016-764902-112info:eu-repo/semantics/altIdentifier/doi/10.1144/0016-764902-112info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:08:30Zoai:ri.conicet.gov.ar:11336/78126instacron: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:34982025-09-03 10:08:31.056CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Basement evolution of the Sierra de la Ventana Fold Belt: New evidence for Cambrian continental rifting along the southern margin of Gondwana |
title |
Basement evolution of the Sierra de la Ventana Fold Belt: New evidence for Cambrian continental rifting along the southern margin of Gondwana |
spellingShingle |
Basement evolution of the Sierra de la Ventana Fold Belt: New evidence for Cambrian continental rifting along the southern margin of Gondwana Rapela, Carlos Washington Geochronology Gondwana Granites Rifting U-Pb Shrimp |
title_short |
Basement evolution of the Sierra de la Ventana Fold Belt: New evidence for Cambrian continental rifting along the southern margin of Gondwana |
title_full |
Basement evolution of the Sierra de la Ventana Fold Belt: New evidence for Cambrian continental rifting along the southern margin of Gondwana |
title_fullStr |
Basement evolution of the Sierra de la Ventana Fold Belt: New evidence for Cambrian continental rifting along the southern margin of Gondwana |
title_full_unstemmed |
Basement evolution of the Sierra de la Ventana Fold Belt: New evidence for Cambrian continental rifting along the southern margin of Gondwana |
title_sort |
Basement evolution of the Sierra de la Ventana Fold Belt: New evidence for Cambrian continental rifting along the southern margin of Gondwana |
dc.creator.none.fl_str_mv |
Rapela, Carlos Washington Pankhurst, R. J. Fanning, C. M. Grecco, Laura Edith |
author |
Rapela, Carlos Washington |
author_facet |
Rapela, Carlos Washington Pankhurst, R. J. Fanning, C. M. Grecco, Laura Edith |
author_role |
author |
author2 |
Pankhurst, R. J. Fanning, C. M. Grecco, Laura Edith |
author2_role |
author author author |
dc.subject.none.fl_str_mv |
Geochronology Gondwana Granites Rifting U-Pb Shrimp |
topic |
Geochronology Gondwana Granites Rifting U-Pb Shrimp |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
U-Pb sensitive high-resolution ion microprobe data together with geochemical and Nd isotope analyses obtained in the basement complex of the Sierra de la Ventana Fold Belt indicate that the Early Palaeozoic passive margin history of the basin followed Cambrian magmatism related to rifting in a 600 Ma Neoproterozoic crust. The Cambrian episode started with intrusion of 531 ± 4 and 524 ± 5 Ma A- and I-type granites derived from a dehydrated infracrustal source (cNd530 - 3.1 to -5.9), and culminated with eruption of high-Zr peralkaline spherulitic rhyolites derived from an undepleted lithospheric mantle (509 ± 5 Ma; cNd509 +0.5 to +1.0). These rift-related magmatic rocks were covered by shelf sediments deposited along a once-continuous passive margin, encompassing the Sierra de la Ventana Fold Belt, the Cape Fold Belt, the Falkland/Malvinas microplate and the Ellsworth Mountains block in Antarctica. The Cambrian rifting event defined the outline shape of the southern part of Gondwana, and can be regarded as the initiation of the supercontinent stage, which lasted until Jurassic break-up. The conjugate continental fragments separated from Gondwana during the Cambrian rifting could be the source for microcontinents with c. 1000 Ma basement rocks that collided with the proto-Andean margin during Ordovician-Silurian times. Fil: Rapela, Carlos Washington. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina Fil: Pankhurst, R. J.. British Antartic Survey; Reino Unido. NERC Isotope Geosciences Laboratory; Reino Unido Fil: Fanning, C. M.. The Australian National University; Australia Fil: Grecco, Laura Edith. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Geológico del Sur. Universidad Nacional del Sur. Departamento de Geología. Instituto Geológico del Sur; Argentina |
description |
U-Pb sensitive high-resolution ion microprobe data together with geochemical and Nd isotope analyses obtained in the basement complex of the Sierra de la Ventana Fold Belt indicate that the Early Palaeozoic passive margin history of the basin followed Cambrian magmatism related to rifting in a 600 Ma Neoproterozoic crust. The Cambrian episode started with intrusion of 531 ± 4 and 524 ± 5 Ma A- and I-type granites derived from a dehydrated infracrustal source (cNd530 - 3.1 to -5.9), and culminated with eruption of high-Zr peralkaline spherulitic rhyolites derived from an undepleted lithospheric mantle (509 ± 5 Ma; cNd509 +0.5 to +1.0). These rift-related magmatic rocks were covered by shelf sediments deposited along a once-continuous passive margin, encompassing the Sierra de la Ventana Fold Belt, the Cape Fold Belt, the Falkland/Malvinas microplate and the Ellsworth Mountains block in Antarctica. The Cambrian rifting event defined the outline shape of the southern part of Gondwana, and can be regarded as the initiation of the supercontinent stage, which lasted until Jurassic break-up. The conjugate continental fragments separated from Gondwana during the Cambrian rifting could be the source for microcontinents with c. 1000 Ma basement rocks that collided with the proto-Andean margin during Ordovician-Silurian times. |
publishDate |
2003 |
dc.date.none.fl_str_mv |
2003-07 |
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/11336/78126 Rapela, Carlos Washington; Pankhurst, R. J.; Fanning, C. M.; Grecco, Laura Edith; Basement evolution of the Sierra de la Ventana Fold Belt: New evidence for Cambrian continental rifting along the southern margin of Gondwana; Geological Society Publications House; Journal of the Geological Society; 160; 4; 7-2003; 613-628 0016-7649 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/78126 |
identifier_str_mv |
Rapela, Carlos Washington; Pankhurst, R. J.; Fanning, C. M.; Grecco, Laura Edith; Basement evolution of the Sierra de la Ventana Fold Belt: New evidence for Cambrian continental rifting along the southern margin of Gondwana; Geological Society Publications House; Journal of the Geological Society; 160; 4; 7-2003; 613-628 0016-7649 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://jgs.lyellcollection.org/content/160/4/613 info:eu-repo/semantics/altIdentifier/url/https://pubs.geoscienceworld.org/jgs/article-lookup?doi=10.1144/0016-764902-112 info:eu-repo/semantics/altIdentifier/doi/10.1144/0016-764902-112 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Geological Society Publications House |
publisher.none.fl_str_mv |
Geological Society Publications House |
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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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1842270047900270592 |
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13.13397 |