Late Jurassic event of ignimbrite flare-up linked to extensional tectonics: The beginnings of Andean volcanism in southern Patagonia (~46°S, Chile).
- Autores
- Suárez, Rodrigo Javier; González, Pablo Diego; Rolando, Ariel Pablo; Andrada, Sebastián; Zaffarana, Claudia Beatriz; Koerber, Daniel
- Año de publicación
- 2024
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Fil: Suárez, Rodrigo Javier. Universidad Nacional de Río Negro, Instituto de Investigación en Paleobiología y Geología, Río Negro, Argentina
Fil: González, Pablo Diego. Universidad Nacional de Río Negro, Instituto de Investigación en Paleobiología y Geología, Río Negro, Argentina
Fil: Rolando, Ariel Pablo. Universidad Nacional de Río Negro, Instituto de Investigación en Paleobiología y Geología, Río Negro, Argentina
Fil: Andrada, Sebastián. Patagonia Gold Corp, Buenos Aires, Argentina
Fil: Zaffarana, Claudia Beatriz. Universidad Nacional de Río Negro, Instituto de Investigación en Paleobiología y Geología, Río Negro, Argentina
Fil: Koerber, Daniel. Equus Minning Limited, Sydney, Australia
Understanding the origin of Late Jurassic volcanism in southern Patagonia is crucial for unraveling the early Andean orogenic evolution. However, radiometric dating is not connected to stratigraphic analysis along the South Patagonian Andes, which obscures the real duration of the Late Jurassic magmatic activity. In this contribution, we present the results of a volcanic stratigraphy analysis, complemented by structural and petrographic data, on a thick succession of acidic volcanogenic rocks in the Laguna Verde district of southern Chile located along the south shore of General Carrera-Buenos Aires Lake. Through the recognition of igneous stratigraphy, we strategically sampled representative volcanogenic rocks that cover the entire duration of eruptive activity. By doing so, the new U–Pb zircon magmatic ages, combined with a compilation of U–Pb crystallization ages from the South Patagonian Andes, allows us to constrain the volcanic activity in the study area to a period of 8 My (~ 155–146 Ma, V3 stage) and 11 My considering age inherent errors. The field recognition of normal faults and the syn-kinematic emplacement of sub-volcanic bodies, which are inferred to conform to a ring-fault system, along with the presence of a thick succession of ignimbrites, suggest that the syn-extensional volcanic emplacement occurred in a caldera volcanic environment. This setting was responsible for the short-lived, voluminous eruptions. Furthermore, the high Th/U zircon ratios identified for the ~ 155–150 Ma period indicate the climax of extensional tectonics. The integration of these data supports the hypothesis that retreating-mode subduction played a major role in producing ignimbrite flare-ups.
Understanding the origin of Late Jurassic volcanism in southern Patagonia is crucial for unraveling the early Andean orogenic evolution. However, radiometric dating is not connected to stratigraphic analysis along the South Patagonian Andes, which obscures the real duration of the Late Jurassic magmatic activity. In this contribution, we present the results of a volcanic stratigraphy analysis, complemented by structural and petrographic data, on a thick succession of acidic volcanogenic rocks in the Laguna Verde district of southern Chile located along the south shore of General Carrera-Buenos Aires Lake. Through the recognition of igneous stratigraphy, we strategically sampled representative volcanogenic rocks that cover the entire duration of eruptive activity. By doing so, the new U–Pb zircon magmatic ages, combined with a compilation of U–Pb crystallization ages from the South Patagonian Andes, allows us to constrain the volcanic activity in the study area to a period of 8 My (~ 155–146 Ma, V3 stage) and 11 My considering age inherent errors. The field recognition of normal faults and the syn-kinematic emplacement of sub-volcanic bodies, which are inferred to conform to a ring-fault system, along with the presence of a thick succession of ignimbrites, suggest that the syn-extensional volcanic emplacement occurred in a caldera volcanic environment. This setting was responsible for the short-lived, voluminous eruptions. Furthermore, the high Th/U zircon ratios identified for the ~ 155–150 Ma period indicate the climax of extensional tectonics. The integration of these data supports the hypothesis that retreating-mode subduction played a major role in producing ignimbrite flare-ups. - Materia
-
Ciencias de la Tierra (General)
volcanism
petrology
K-Ar dating
Patagonia
accretionary orogen
Ciencias de la Tierra (General) - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
- Institución
- Universidad Nacional de Río Negro
- OAI Identificador
- oai:rid.unrn.edu.ar:20.500.12049/13196
Ver los metadatos del registro completo
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Late Jurassic event of ignimbrite flare-up linked to extensional tectonics: The beginnings of Andean volcanism in southern Patagonia (~46°S, Chile).Suárez, Rodrigo JavierGonzález, Pablo DiegoRolando, Ariel PabloAndrada, SebastiánZaffarana, Claudia BeatrizKoerber, DanielCiencias de la Tierra (General)volcanismpetrologyK-Ar datingPatagoniaaccretionary orogenCiencias de la Tierra (General)Fil: Suárez, Rodrigo Javier. Universidad Nacional de Río Negro, Instituto de Investigación en Paleobiología y Geología, Río Negro, ArgentinaFil: González, Pablo Diego. Universidad Nacional de Río Negro, Instituto de Investigación en Paleobiología y Geología, Río Negro, ArgentinaFil: Rolando, Ariel Pablo. Universidad Nacional de Río Negro, Instituto de Investigación en Paleobiología y Geología, Río Negro, ArgentinaFil: Andrada, Sebastián. Patagonia Gold Corp, Buenos Aires, ArgentinaFil: Zaffarana, Claudia Beatriz. Universidad Nacional de Río Negro, Instituto de Investigación en Paleobiología y Geología, Río Negro, ArgentinaFil: Koerber, Daniel. Equus Minning Limited, Sydney, AustraliaUnderstanding the origin of Late Jurassic volcanism in southern Patagonia is crucial for unraveling the early Andean orogenic evolution. However, radiometric dating is not connected to stratigraphic analysis along the South Patagonian Andes, which obscures the real duration of the Late Jurassic magmatic activity. In this contribution, we present the results of a volcanic stratigraphy analysis, complemented by structural and petrographic data, on a thick succession of acidic volcanogenic rocks in the Laguna Verde district of southern Chile located along the south shore of General Carrera-Buenos Aires Lake. Through the recognition of igneous stratigraphy, we strategically sampled representative volcanogenic rocks that cover the entire duration of eruptive activity. By doing so, the new U–Pb zircon magmatic ages, combined with a compilation of U–Pb crystallization ages from the South Patagonian Andes, allows us to constrain the volcanic activity in the study area to a period of 8 My (~ 155–146 Ma, V3 stage) and 11 My considering age inherent errors. The field recognition of normal faults and the syn-kinematic emplacement of sub-volcanic bodies, which are inferred to conform to a ring-fault system, along with the presence of a thick succession of ignimbrites, suggest that the syn-extensional volcanic emplacement occurred in a caldera volcanic environment. This setting was responsible for the short-lived, voluminous eruptions. Furthermore, the high Th/U zircon ratios identified for the ~ 155–150 Ma period indicate the climax of extensional tectonics. The integration of these data supports the hypothesis that retreating-mode subduction played a major role in producing ignimbrite flare-ups.Understanding the origin of Late Jurassic volcanism in southern Patagonia is crucial for unraveling the early Andean orogenic evolution. However, radiometric dating is not connected to stratigraphic analysis along the South Patagonian Andes, which obscures the real duration of the Late Jurassic magmatic activity. In this contribution, we present the results of a volcanic stratigraphy analysis, complemented by structural and petrographic data, on a thick succession of acidic volcanogenic rocks in the Laguna Verde district of southern Chile located along the south shore of General Carrera-Buenos Aires Lake. Through the recognition of igneous stratigraphy, we strategically sampled representative volcanogenic rocks that cover the entire duration of eruptive activity. By doing so, the new U–Pb zircon magmatic ages, combined with a compilation of U–Pb crystallization ages from the South Patagonian Andes, allows us to constrain the volcanic activity in the study area to a period of 8 My (~ 155–146 Ma, V3 stage) and 11 My considering age inherent errors. The field recognition of normal faults and the syn-kinematic emplacement of sub-volcanic bodies, which are inferred to conform to a ring-fault system, along with the presence of a thick succession of ignimbrites, suggest that the syn-extensional volcanic emplacement occurred in a caldera volcanic environment. This setting was responsible for the short-lived, voluminous eruptions. Furthermore, the high Th/U zircon ratios identified for the ~ 155–150 Ma period indicate the climax of extensional tectonics. The integration of these data supports the hypothesis that retreating-mode subduction played a major role in producing ignimbrite flare-ups.Springer2024-08-15info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfSuárez, R., González, P.D., Rolando, A.P., Andrada, S., Zaffarana, C., Koerber, D. 2024. Late Jurassic event of ignimbrite flare-up linked to extensional tectonics: The beginnings of Andean volcanism in southern Patagonia (~46°S, Chile). International Journal of Earth Sciences 113, 1407-1426.http://rid.unrn.edu.ar/handle/20.500.12049/13196enghttps://link.springer.com/article/10.1007/s00531-024-02449-z113International Journal of Earth Sciencesinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/4.0/reponame:RID-UNRN (UNRN)instname:Universidad Nacional de Río Negro2025-09-04T11:12:55Zoai:rid.unrn.edu.ar:20.500.12049/13196instacron:UNRNInstitucionalhttps://rid.unrn.edu.ar/jspui/Universidad públicaNo correspondehttps://rid.unrn.edu.ar/oai/snrdrid@unrn.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:43692025-09-04 11:12:55.755RID-UNRN (UNRN) - Universidad Nacional de Río Negrofalse |
dc.title.none.fl_str_mv |
Late Jurassic event of ignimbrite flare-up linked to extensional tectonics: The beginnings of Andean volcanism in southern Patagonia (~46°S, Chile). |
title |
Late Jurassic event of ignimbrite flare-up linked to extensional tectonics: The beginnings of Andean volcanism in southern Patagonia (~46°S, Chile). |
spellingShingle |
Late Jurassic event of ignimbrite flare-up linked to extensional tectonics: The beginnings of Andean volcanism in southern Patagonia (~46°S, Chile). Suárez, Rodrigo Javier Ciencias de la Tierra (General) volcanism petrology K-Ar dating Patagonia accretionary orogen Ciencias de la Tierra (General) |
title_short |
Late Jurassic event of ignimbrite flare-up linked to extensional tectonics: The beginnings of Andean volcanism in southern Patagonia (~46°S, Chile). |
title_full |
Late Jurassic event of ignimbrite flare-up linked to extensional tectonics: The beginnings of Andean volcanism in southern Patagonia (~46°S, Chile). |
title_fullStr |
Late Jurassic event of ignimbrite flare-up linked to extensional tectonics: The beginnings of Andean volcanism in southern Patagonia (~46°S, Chile). |
title_full_unstemmed |
Late Jurassic event of ignimbrite flare-up linked to extensional tectonics: The beginnings of Andean volcanism in southern Patagonia (~46°S, Chile). |
title_sort |
Late Jurassic event of ignimbrite flare-up linked to extensional tectonics: The beginnings of Andean volcanism in southern Patagonia (~46°S, Chile). |
dc.creator.none.fl_str_mv |
Suárez, Rodrigo Javier González, Pablo Diego Rolando, Ariel Pablo Andrada, Sebastián Zaffarana, Claudia Beatriz Koerber, Daniel |
author |
Suárez, Rodrigo Javier |
author_facet |
Suárez, Rodrigo Javier González, Pablo Diego Rolando, Ariel Pablo Andrada, Sebastián Zaffarana, Claudia Beatriz Koerber, Daniel |
author_role |
author |
author2 |
González, Pablo Diego Rolando, Ariel Pablo Andrada, Sebastián Zaffarana, Claudia Beatriz Koerber, Daniel |
author2_role |
author author author author author |
dc.subject.none.fl_str_mv |
Ciencias de la Tierra (General) volcanism petrology K-Ar dating Patagonia accretionary orogen Ciencias de la Tierra (General) |
topic |
Ciencias de la Tierra (General) volcanism petrology K-Ar dating Patagonia accretionary orogen Ciencias de la Tierra (General) |
dc.description.none.fl_txt_mv |
Fil: Suárez, Rodrigo Javier. Universidad Nacional de Río Negro, Instituto de Investigación en Paleobiología y Geología, Río Negro, Argentina Fil: González, Pablo Diego. Universidad Nacional de Río Negro, Instituto de Investigación en Paleobiología y Geología, Río Negro, Argentina Fil: Rolando, Ariel Pablo. Universidad Nacional de Río Negro, Instituto de Investigación en Paleobiología y Geología, Río Negro, Argentina Fil: Andrada, Sebastián. Patagonia Gold Corp, Buenos Aires, Argentina Fil: Zaffarana, Claudia Beatriz. Universidad Nacional de Río Negro, Instituto de Investigación en Paleobiología y Geología, Río Negro, Argentina Fil: Koerber, Daniel. Equus Minning Limited, Sydney, Australia Understanding the origin of Late Jurassic volcanism in southern Patagonia is crucial for unraveling the early Andean orogenic evolution. However, radiometric dating is not connected to stratigraphic analysis along the South Patagonian Andes, which obscures the real duration of the Late Jurassic magmatic activity. In this contribution, we present the results of a volcanic stratigraphy analysis, complemented by structural and petrographic data, on a thick succession of acidic volcanogenic rocks in the Laguna Verde district of southern Chile located along the south shore of General Carrera-Buenos Aires Lake. Through the recognition of igneous stratigraphy, we strategically sampled representative volcanogenic rocks that cover the entire duration of eruptive activity. By doing so, the new U–Pb zircon magmatic ages, combined with a compilation of U–Pb crystallization ages from the South Patagonian Andes, allows us to constrain the volcanic activity in the study area to a period of 8 My (~ 155–146 Ma, V3 stage) and 11 My considering age inherent errors. The field recognition of normal faults and the syn-kinematic emplacement of sub-volcanic bodies, which are inferred to conform to a ring-fault system, along with the presence of a thick succession of ignimbrites, suggest that the syn-extensional volcanic emplacement occurred in a caldera volcanic environment. This setting was responsible for the short-lived, voluminous eruptions. Furthermore, the high Th/U zircon ratios identified for the ~ 155–150 Ma period indicate the climax of extensional tectonics. The integration of these data supports the hypothesis that retreating-mode subduction played a major role in producing ignimbrite flare-ups. Understanding the origin of Late Jurassic volcanism in southern Patagonia is crucial for unraveling the early Andean orogenic evolution. However, radiometric dating is not connected to stratigraphic analysis along the South Patagonian Andes, which obscures the real duration of the Late Jurassic magmatic activity. In this contribution, we present the results of a volcanic stratigraphy analysis, complemented by structural and petrographic data, on a thick succession of acidic volcanogenic rocks in the Laguna Verde district of southern Chile located along the south shore of General Carrera-Buenos Aires Lake. Through the recognition of igneous stratigraphy, we strategically sampled representative volcanogenic rocks that cover the entire duration of eruptive activity. By doing so, the new U–Pb zircon magmatic ages, combined with a compilation of U–Pb crystallization ages from the South Patagonian Andes, allows us to constrain the volcanic activity in the study area to a period of 8 My (~ 155–146 Ma, V3 stage) and 11 My considering age inherent errors. The field recognition of normal faults and the syn-kinematic emplacement of sub-volcanic bodies, which are inferred to conform to a ring-fault system, along with the presence of a thick succession of ignimbrites, suggest that the syn-extensional volcanic emplacement occurred in a caldera volcanic environment. This setting was responsible for the short-lived, voluminous eruptions. Furthermore, the high Th/U zircon ratios identified for the ~ 155–150 Ma period indicate the climax of extensional tectonics. The integration of these data supports the hypothesis that retreating-mode subduction played a major role in producing ignimbrite flare-ups. |
description |
Fil: Suárez, Rodrigo Javier. Universidad Nacional de Río Negro, Instituto de Investigación en Paleobiología y Geología, Río Negro, Argentina |
publishDate |
2024 |
dc.date.none.fl_str_mv |
2024-08-15 |
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 |
Suárez, R., González, P.D., Rolando, A.P., Andrada, S., Zaffarana, C., Koerber, D. 2024. Late Jurassic event of ignimbrite flare-up linked to extensional tectonics: The beginnings of Andean volcanism in southern Patagonia (~46°S, Chile). International Journal of Earth Sciences 113, 1407-1426. http://rid.unrn.edu.ar/handle/20.500.12049/13196 |
identifier_str_mv |
Suárez, R., González, P.D., Rolando, A.P., Andrada, S., Zaffarana, C., Koerber, D. 2024. Late Jurassic event of ignimbrite flare-up linked to extensional tectonics: The beginnings of Andean volcanism in southern Patagonia (~46°S, Chile). International Journal of Earth Sciences 113, 1407-1426. |
url |
http://rid.unrn.edu.ar/handle/20.500.12049/13196 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://link.springer.com/article/10.1007/s00531-024-02449-z 113 International Journal of Earth Sciences |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/4.0/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-sa/4.0/ |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Springer |
publisher.none.fl_str_mv |
Springer |
dc.source.none.fl_str_mv |
reponame:RID-UNRN (UNRN) instname:Universidad Nacional de Río Negro |
reponame_str |
RID-UNRN (UNRN) |
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RID-UNRN (UNRN) |
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Universidad Nacional de Río Negro |
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RID-UNRN (UNRN) - Universidad Nacional de Río Negro |
repository.mail.fl_str_mv |
rid@unrn.edu.ar |
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12.623145 |