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
RID-UNRN (UNRN)
Institución
Universidad Nacional de Río Negro
OAI Identificador
oai:rid.unrn.edu.ar:20.500.12049/13196

id RIDUNRN_d73055bbfdd512c25ee327932281b605
oai_identifier_str oai:rid.unrn.edu.ar:20.500.12049/13196
network_acronym_str RIDUNRN
repository_id_str 4369
network_name_str RID-UNRN (UNRN)
spelling 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)
collection RID-UNRN (UNRN)
instname_str Universidad Nacional de Río Negro
repository.name.fl_str_mv RID-UNRN (UNRN) - Universidad Nacional de Río Negro
repository.mail.fl_str_mv rid@unrn.edu.ar
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