Late triassic detrital zircon ages from the nunatak Viedma on the southern patagonian icefield

Autores
Suárez, Rodrigo Javier; Ghiglione, Matias; Calderón, Mauricio; Sue, Christian; Martinod, Joseph
Año de publicación
2018
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
The Nunatak Viedma on the Southern Patagonian Icefield has been historically considered as a volcanic center based onmorphological evidence. Field explorations carried out at the summer of 1958-1959 by Eric Shipton determined its metamorphicsedimentarynature. However, the age of these rocks is unknown as well as its possible correlation with others metamorphiccomplexes that constitute the basement of southern Patagonia. In order to constrain the maximum depositional age of theprotoliths and to identify the provenance sources, three samples of metasedimentary rocks were taken from the southern outcropsof the Nunatak Viedma to analyze detrital zircons by LA-ICP-MS U-Pb method. The age distribution of detrital zircon grainsallowed identifying groups of Paleozoic-lower Mesozoic (65%), Proterozoic (34%) and isolated Archean ages (1%). The peaksof Paleozoic-early Mesozoic detrital ages define main groups in Lower Cambrian (~520 Ma), Lower-Middle Ordovician (~480-460 Ma), Upper Devonian (~380 Ma), Permian (~290-260 Ma) and Triassic (~235-225 Ma). Besides the maximum depositionalage was constrained at 220 Ma, which indicates that the deposition of the protoliths was active during the Late Triassic. Thesources areas for the detrital zircons are identified in the Malvinas Island, in the Deseado Massif, the erosion of the Eastern AndesMetamorphic Complex, the buried basement of Tierra del Fuego and outcrops in the Antarctic Peninsula. The cluster of Permian-Triassic ages may be related to the erosion of the volcanic arc emplaced along the western edge of Patagonia and AntarcticPeninsula, supporting the idea that Antarctic Peninsula was located in the southwestern edge of Southern Patagonia during thePermian-Triassic times. Despite the kind of basin in which the protoliths were deposited is unclear, the pattern of detrital zirconsallows us to infer a back-arc basin related to convergent settings as a possibly depositional environment, which is supported bythe petrography.
Fil: Suárez, Rodrigo Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
Fil: Ghiglione, Matias. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
Fil: Calderón, Mauricio. Universidad Andrés Bello; Chile
Fil: Sue, Christian. Universite de Franche-Comte; Francia
Fil: Martinod, Joseph. Université de Savoie Mont-Blanc; Francia
XV Congreso Geológico Chileno
Concepción
Chile
Universidad de Concepción
Colegio de Geólogos de Chile
Sociedad Geológica de Chile
Materia
Detrital zircon ages
Nunatak Viedma
Late Triassic
Chonide orogenic event
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/193876
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/193876
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Late triassic detrital zircon ages from the nunatak Viedma on the southern patagonian icefieldSuárez, Rodrigo JavierGhiglione, MatiasCalderón, MauricioSue, ChristianMartinod, JosephDetrital zircon agesNunatak ViedmaLate TriassicChonide orogenic eventhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The Nunatak Viedma on the Southern Patagonian Icefield has been historically considered as a volcanic center based onmorphological evidence. Field explorations carried out at the summer of 1958-1959 by Eric Shipton determined its metamorphicsedimentarynature. However, the age of these rocks is unknown as well as its possible correlation with others metamorphiccomplexes that constitute the basement of southern Patagonia. In order to constrain the maximum depositional age of theprotoliths and to identify the provenance sources, three samples of metasedimentary rocks were taken from the southern outcropsof the Nunatak Viedma to analyze detrital zircons by LA-ICP-MS U-Pb method. The age distribution of detrital zircon grainsallowed identifying groups of Paleozoic-lower Mesozoic (65%), Proterozoic (34%) and isolated Archean ages (1%). The peaksof Paleozoic-early Mesozoic detrital ages define main groups in Lower Cambrian (~520 Ma), Lower-Middle Ordovician (~480-460 Ma), Upper Devonian (~380 Ma), Permian (~290-260 Ma) and Triassic (~235-225 Ma). Besides the maximum depositionalage was constrained at 220 Ma, which indicates that the deposition of the protoliths was active during the Late Triassic. Thesources areas for the detrital zircons are identified in the Malvinas Island, in the Deseado Massif, the erosion of the Eastern AndesMetamorphic Complex, the buried basement of Tierra del Fuego and outcrops in the Antarctic Peninsula. The cluster of Permian-Triassic ages may be related to the erosion of the volcanic arc emplaced along the western edge of Patagonia and AntarcticPeninsula, supporting the idea that Antarctic Peninsula was located in the southwestern edge of Southern Patagonia during thePermian-Triassic times. Despite the kind of basin in which the protoliths were deposited is unclear, the pattern of detrital zirconsallows us to infer a back-arc basin related to convergent settings as a possibly depositional environment, which is supported bythe petrography.Fil: Suárez, Rodrigo Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; ArgentinaFil: Ghiglione, Matias. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; ArgentinaFil: Calderón, Mauricio. Universidad Andrés Bello; ChileFil: Sue, Christian. Universite de Franche-Comte; FranciaFil: Martinod, Joseph. Université de Savoie Mont-Blanc; FranciaXV Congreso Geológico ChilenoConcepciónChileUniversidad de ConcepciónColegio de Geólogos de ChileSociedad Geológica de ChileUniversidad de Concepción2018info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectCongresoBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/193876Late triassic detrital zircon ages from the nunatak Viedma on the southern patagonian icefield; XV Congreso Geológico Chileno; Concepción; Chile; 2018; 1-1507CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://congresogeologicochileno.cl/wp-content/uploads/2018/12/Libro-de-Actas-XVCongresoGeologicoChileno2018-2.pdfInternacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:00:17Zoai:ri.conicet.gov.ar:11336/193876instacron: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 10:00:17.932CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Late triassic detrital zircon ages from the nunatak Viedma on the southern patagonian icefield
title Late triassic detrital zircon ages from the nunatak Viedma on the southern patagonian icefield
spellingShingle Late triassic detrital zircon ages from the nunatak Viedma on the southern patagonian icefield
Suárez, Rodrigo Javier
Detrital zircon ages
Nunatak Viedma
Late Triassic
Chonide orogenic event
title_short Late triassic detrital zircon ages from the nunatak Viedma on the southern patagonian icefield
title_full Late triassic detrital zircon ages from the nunatak Viedma on the southern patagonian icefield
title_fullStr Late triassic detrital zircon ages from the nunatak Viedma on the southern patagonian icefield
title_full_unstemmed Late triassic detrital zircon ages from the nunatak Viedma on the southern patagonian icefield
title_sort Late triassic detrital zircon ages from the nunatak Viedma on the southern patagonian icefield
dc.creator.none.fl_str_mv Suárez, Rodrigo Javier
Ghiglione, Matias
Calderón, Mauricio
Sue, Christian
Martinod, Joseph
author Suárez, Rodrigo Javier
author_facet Suárez, Rodrigo Javier
Ghiglione, Matias
Calderón, Mauricio
Sue, Christian
Martinod, Joseph
author_role author
author2 Ghiglione, Matias
Calderón, Mauricio
Sue, Christian
Martinod, Joseph
author2_role author
author
author
author
dc.subject.none.fl_str_mv Detrital zircon ages
Nunatak Viedma
Late Triassic
Chonide orogenic event
topic Detrital zircon ages
Nunatak Viedma
Late Triassic
Chonide orogenic event
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 Nunatak Viedma on the Southern Patagonian Icefield has been historically considered as a volcanic center based onmorphological evidence. Field explorations carried out at the summer of 1958-1959 by Eric Shipton determined its metamorphicsedimentarynature. However, the age of these rocks is unknown as well as its possible correlation with others metamorphiccomplexes that constitute the basement of southern Patagonia. In order to constrain the maximum depositional age of theprotoliths and to identify the provenance sources, three samples of metasedimentary rocks were taken from the southern outcropsof the Nunatak Viedma to analyze detrital zircons by LA-ICP-MS U-Pb method. The age distribution of detrital zircon grainsallowed identifying groups of Paleozoic-lower Mesozoic (65%), Proterozoic (34%) and isolated Archean ages (1%). The peaksof Paleozoic-early Mesozoic detrital ages define main groups in Lower Cambrian (~520 Ma), Lower-Middle Ordovician (~480-460 Ma), Upper Devonian (~380 Ma), Permian (~290-260 Ma) and Triassic (~235-225 Ma). Besides the maximum depositionalage was constrained at 220 Ma, which indicates that the deposition of the protoliths was active during the Late Triassic. Thesources areas for the detrital zircons are identified in the Malvinas Island, in the Deseado Massif, the erosion of the Eastern AndesMetamorphic Complex, the buried basement of Tierra del Fuego and outcrops in the Antarctic Peninsula. The cluster of Permian-Triassic ages may be related to the erosion of the volcanic arc emplaced along the western edge of Patagonia and AntarcticPeninsula, supporting the idea that Antarctic Peninsula was located in the southwestern edge of Southern Patagonia during thePermian-Triassic times. Despite the kind of basin in which the protoliths were deposited is unclear, the pattern of detrital zirconsallows us to infer a back-arc basin related to convergent settings as a possibly depositional environment, which is supported bythe petrography.
Fil: Suárez, Rodrigo Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
Fil: Ghiglione, Matias. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
Fil: Calderón, Mauricio. Universidad Andrés Bello; Chile
Fil: Sue, Christian. Universite de Franche-Comte; Francia
Fil: Martinod, Joseph. Université de Savoie Mont-Blanc; Francia
XV Congreso Geológico Chileno
Concepción
Chile
Universidad de Concepción
Colegio de Geólogos de Chile
Sociedad Geológica de Chile
description The Nunatak Viedma on the Southern Patagonian Icefield has been historically considered as a volcanic center based onmorphological evidence. Field explorations carried out at the summer of 1958-1959 by Eric Shipton determined its metamorphicsedimentarynature. However, the age of these rocks is unknown as well as its possible correlation with others metamorphiccomplexes that constitute the basement of southern Patagonia. In order to constrain the maximum depositional age of theprotoliths and to identify the provenance sources, three samples of metasedimentary rocks were taken from the southern outcropsof the Nunatak Viedma to analyze detrital zircons by LA-ICP-MS U-Pb method. The age distribution of detrital zircon grainsallowed identifying groups of Paleozoic-lower Mesozoic (65%), Proterozoic (34%) and isolated Archean ages (1%). The peaksof Paleozoic-early Mesozoic detrital ages define main groups in Lower Cambrian (~520 Ma), Lower-Middle Ordovician (~480-460 Ma), Upper Devonian (~380 Ma), Permian (~290-260 Ma) and Triassic (~235-225 Ma). Besides the maximum depositionalage was constrained at 220 Ma, which indicates that the deposition of the protoliths was active during the Late Triassic. Thesources areas for the detrital zircons are identified in the Malvinas Island, in the Deseado Massif, the erosion of the Eastern AndesMetamorphic Complex, the buried basement of Tierra del Fuego and outcrops in the Antarctic Peninsula. The cluster of Permian-Triassic ages may be related to the erosion of the volcanic arc emplaced along the western edge of Patagonia and AntarcticPeninsula, supporting the idea that Antarctic Peninsula was located in the southwestern edge of Southern Patagonia during thePermian-Triassic times. Despite the kind of basin in which the protoliths were deposited is unclear, the pattern of detrital zirconsallows us to infer a back-arc basin related to convergent settings as a possibly depositional environment, which is supported bythe petrography.
publishDate 2018
dc.date.none.fl_str_mv 2018
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Congreso
Book
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
status_str publishedVersion
format conferenceObject
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/193876
Late triassic detrital zircon ages from the nunatak Viedma on the southern patagonian icefield; XV Congreso Geológico Chileno; Concepción; Chile; 2018; 1-1507
CONICET Digital
CONICET
url http://hdl.handle.net/11336/193876
identifier_str_mv Late triassic detrital zircon ages from the nunatak Viedma on the southern patagonian icefield; XV Congreso Geológico Chileno; Concepción; Chile; 2018; 1-1507
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://congresogeologicochileno.cl/wp-content/uploads/2018/12/Libro-de-Actas-XVCongresoGeologicoChileno2018-2.pdf
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
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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
dc.coverage.none.fl_str_mv Internacional
dc.publisher.none.fl_str_mv Universidad de Concepción
publisher.none.fl_str_mv Universidad de Concepción
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
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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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