Volcanic evolution of the back-arc Pleistocene Payun Matru volcanic field (Argentina)

Autores
Germa, A.; Quidelleur, X.; Gillot, P.Y.; Tchilinguirian, Pablo
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
For the first time, about 30 volcanic formations of the back-arc Payun Matru volcanic field (Payun Matru volcanic field, Argentina, 36°S, 69°W) have been sampled for K-Ar geochronology and geochemistry in order to reconstruct the eruptive history of this key province in the Andean back-arc. The Payun Matru volcanic field has been built since final Pleistocene until present with ages ranging from 280±5 to 7±1ka. Erupted lavas belong to calc-alkaline series, with characteristics of both arc and intraplate magmas. From previous studies, three main units are distinguished: (1) a basaltic field (Los Volcanes), which covers a large surface of the Payun Matru volcanic field, composed of strombolian cones and associated lava flows emitted from 300ka to Holocene times, (2) the stratovolcano Payun, with intermediate compositions, built around 265ka, and (3) the shield volcano Payun Matru s.s. characterized by trachytic compositions and a large summit caldera. The earlier stages of the Payun Matru volcano are not dated, but we constrain the major explosive event, related to the eruption of a widespread ignimbrite and to the formation of the caldera, between 168±4ka (internal wall of caldera) and 82±1ka (flow within the caldera). Based on the geochemical similarities of the ignimbrite and the upper lava flow of the pre-caldera cone, we suggest that the age of this event is most probably at the older end of this interval. Numerical modeling using a GIS program has been used to reconstruct the morphological evolution for Payun Matru volcano before and after the caldera collapse. The ancient edifice could be modeled as a flattened cone, 2300m high, with a volume of about 240km3. The ignimbrite eruption associated with the Payun Matru caldera formation could be related to the regional tectonic environment, which is characterized by multiple Plio-Pleistocene extensional stages during the last 5Myr. The evolution of the Nazca plate subduction from a flat slab to a normal dip induced an input of fluid mobile elements and asthenosphere plume-like mantle source beneath the Patagonian lithosphere, which yields the observed intraplate signature. We also interpret this geodynamic evolution as the influence of extensive processes in the upper crust leading to caldera-forming eruptions as observed throughout this province.
Fil: Germa, A.. Université Paris Sud; Francia. Centre National de la Recherche Scientifique; Francia
Fil: Quidelleur, X.. Université Paris Sud; Francia. Centre National de la Recherche Scientifique; Francia
Fil: Gillot, P.Y.. Université Paris Sud; Francia. Centre National de la Recherche Scientifique; Francia
Fil: Tchilinguirian, Pablo. Universidad de Buenos Aires; Argentina. Secretaría de Industria y Minería. Servicio Geológico Minero Argentino; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
ANDES
BACK-ARC VOLCANISM
CALDERA
K-AR DATING
PAYUN MATRU
PLEISTOCENE
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:11336/98912

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oai_identifier_str oai:ri.conicet.gov.ar:11336/98912
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Volcanic evolution of the back-arc Pleistocene Payun Matru volcanic field (Argentina)Germa, A.Quidelleur, X.Gillot, P.Y.Tchilinguirian, PabloANDESBACK-ARC VOLCANISMCALDERAK-AR DATINGPAYUN MATRUPLEISTOCENEhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1For the first time, about 30 volcanic formations of the back-arc Payun Matru volcanic field (Payun Matru volcanic field, Argentina, 36°S, 69°W) have been sampled for K-Ar geochronology and geochemistry in order to reconstruct the eruptive history of this key province in the Andean back-arc. The Payun Matru volcanic field has been built since final Pleistocene until present with ages ranging from 280±5 to 7±1ka. Erupted lavas belong to calc-alkaline series, with characteristics of both arc and intraplate magmas. From previous studies, three main units are distinguished: (1) a basaltic field (Los Volcanes), which covers a large surface of the Payun Matru volcanic field, composed of strombolian cones and associated lava flows emitted from 300ka to Holocene times, (2) the stratovolcano Payun, with intermediate compositions, built around 265ka, and (3) the shield volcano Payun Matru s.s. characterized by trachytic compositions and a large summit caldera. The earlier stages of the Payun Matru volcano are not dated, but we constrain the major explosive event, related to the eruption of a widespread ignimbrite and to the formation of the caldera, between 168±4ka (internal wall of caldera) and 82±1ka (flow within the caldera). Based on the geochemical similarities of the ignimbrite and the upper lava flow of the pre-caldera cone, we suggest that the age of this event is most probably at the older end of this interval. Numerical modeling using a GIS program has been used to reconstruct the morphological evolution for Payun Matru volcano before and after the caldera collapse. The ancient edifice could be modeled as a flattened cone, 2300m high, with a volume of about 240km3. The ignimbrite eruption associated with the Payun Matru caldera formation could be related to the regional tectonic environment, which is characterized by multiple Plio-Pleistocene extensional stages during the last 5Myr. The evolution of the Nazca plate subduction from a flat slab to a normal dip induced an input of fluid mobile elements and asthenosphere plume-like mantle source beneath the Patagonian lithosphere, which yields the observed intraplate signature. We also interpret this geodynamic evolution as the influence of extensive processes in the upper crust leading to caldera-forming eruptions as observed throughout this province.Fil: Germa, A.. Université Paris Sud; Francia. Centre National de la Recherche Scientifique; FranciaFil: Quidelleur, X.. Université Paris Sud; Francia. Centre National de la Recherche Scientifique; FranciaFil: Gillot, P.Y.. Université Paris Sud; Francia. Centre National de la Recherche Scientifique; FranciaFil: Tchilinguirian, Pablo. Universidad de Buenos Aires; Argentina. Secretaría de Industria y Minería. Servicio Geológico Minero Argentino; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaPergamon-Elsevier Science Ltd2010-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/98912Germa, A.; Quidelleur, X.; Gillot, P.Y.; Tchilinguirian, Pablo; Volcanic evolution of the back-arc Pleistocene Payun Matru volcanic field (Argentina); Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 29; 3; 4-2010; 717-7300895-9811CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0895981110000040info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2010.01.002info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:55:45Zoai:ri.conicet.gov.ar:11336/98912instacron: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 09:55:46.088CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Volcanic evolution of the back-arc Pleistocene Payun Matru volcanic field (Argentina)
title Volcanic evolution of the back-arc Pleistocene Payun Matru volcanic field (Argentina)
spellingShingle Volcanic evolution of the back-arc Pleistocene Payun Matru volcanic field (Argentina)
Germa, A.
ANDES
BACK-ARC VOLCANISM
CALDERA
K-AR DATING
PAYUN MATRU
PLEISTOCENE
title_short Volcanic evolution of the back-arc Pleistocene Payun Matru volcanic field (Argentina)
title_full Volcanic evolution of the back-arc Pleistocene Payun Matru volcanic field (Argentina)
title_fullStr Volcanic evolution of the back-arc Pleistocene Payun Matru volcanic field (Argentina)
title_full_unstemmed Volcanic evolution of the back-arc Pleistocene Payun Matru volcanic field (Argentina)
title_sort Volcanic evolution of the back-arc Pleistocene Payun Matru volcanic field (Argentina)
dc.creator.none.fl_str_mv Germa, A.
Quidelleur, X.
Gillot, P.Y.
Tchilinguirian, Pablo
author Germa, A.
author_facet Germa, A.
Quidelleur, X.
Gillot, P.Y.
Tchilinguirian, Pablo
author_role author
author2 Quidelleur, X.
Gillot, P.Y.
Tchilinguirian, Pablo
author2_role author
author
author
dc.subject.none.fl_str_mv ANDES
BACK-ARC VOLCANISM
CALDERA
K-AR DATING
PAYUN MATRU
PLEISTOCENE
topic ANDES
BACK-ARC VOLCANISM
CALDERA
K-AR DATING
PAYUN MATRU
PLEISTOCENE
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv For the first time, about 30 volcanic formations of the back-arc Payun Matru volcanic field (Payun Matru volcanic field, Argentina, 36°S, 69°W) have been sampled for K-Ar geochronology and geochemistry in order to reconstruct the eruptive history of this key province in the Andean back-arc. The Payun Matru volcanic field has been built since final Pleistocene until present with ages ranging from 280±5 to 7±1ka. Erupted lavas belong to calc-alkaline series, with characteristics of both arc and intraplate magmas. From previous studies, three main units are distinguished: (1) a basaltic field (Los Volcanes), which covers a large surface of the Payun Matru volcanic field, composed of strombolian cones and associated lava flows emitted from 300ka to Holocene times, (2) the stratovolcano Payun, with intermediate compositions, built around 265ka, and (3) the shield volcano Payun Matru s.s. characterized by trachytic compositions and a large summit caldera. The earlier stages of the Payun Matru volcano are not dated, but we constrain the major explosive event, related to the eruption of a widespread ignimbrite and to the formation of the caldera, between 168±4ka (internal wall of caldera) and 82±1ka (flow within the caldera). Based on the geochemical similarities of the ignimbrite and the upper lava flow of the pre-caldera cone, we suggest that the age of this event is most probably at the older end of this interval. Numerical modeling using a GIS program has been used to reconstruct the morphological evolution for Payun Matru volcano before and after the caldera collapse. The ancient edifice could be modeled as a flattened cone, 2300m high, with a volume of about 240km3. The ignimbrite eruption associated with the Payun Matru caldera formation could be related to the regional tectonic environment, which is characterized by multiple Plio-Pleistocene extensional stages during the last 5Myr. The evolution of the Nazca plate subduction from a flat slab to a normal dip induced an input of fluid mobile elements and asthenosphere plume-like mantle source beneath the Patagonian lithosphere, which yields the observed intraplate signature. We also interpret this geodynamic evolution as the influence of extensive processes in the upper crust leading to caldera-forming eruptions as observed throughout this province.
Fil: Germa, A.. Université Paris Sud; Francia. Centre National de la Recherche Scientifique; Francia
Fil: Quidelleur, X.. Université Paris Sud; Francia. Centre National de la Recherche Scientifique; Francia
Fil: Gillot, P.Y.. Université Paris Sud; Francia. Centre National de la Recherche Scientifique; Francia
Fil: Tchilinguirian, Pablo. Universidad de Buenos Aires; Argentina. Secretaría de Industria y Minería. Servicio Geológico Minero Argentino; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description For the first time, about 30 volcanic formations of the back-arc Payun Matru volcanic field (Payun Matru volcanic field, Argentina, 36°S, 69°W) have been sampled for K-Ar geochronology and geochemistry in order to reconstruct the eruptive history of this key province in the Andean back-arc. The Payun Matru volcanic field has been built since final Pleistocene until present with ages ranging from 280±5 to 7±1ka. Erupted lavas belong to calc-alkaline series, with characteristics of both arc and intraplate magmas. From previous studies, three main units are distinguished: (1) a basaltic field (Los Volcanes), which covers a large surface of the Payun Matru volcanic field, composed of strombolian cones and associated lava flows emitted from 300ka to Holocene times, (2) the stratovolcano Payun, with intermediate compositions, built around 265ka, and (3) the shield volcano Payun Matru s.s. characterized by trachytic compositions and a large summit caldera. The earlier stages of the Payun Matru volcano are not dated, but we constrain the major explosive event, related to the eruption of a widespread ignimbrite and to the formation of the caldera, between 168±4ka (internal wall of caldera) and 82±1ka (flow within the caldera). Based on the geochemical similarities of the ignimbrite and the upper lava flow of the pre-caldera cone, we suggest that the age of this event is most probably at the older end of this interval. Numerical modeling using a GIS program has been used to reconstruct the morphological evolution for Payun Matru volcano before and after the caldera collapse. The ancient edifice could be modeled as a flattened cone, 2300m high, with a volume of about 240km3. The ignimbrite eruption associated with the Payun Matru caldera formation could be related to the regional tectonic environment, which is characterized by multiple Plio-Pleistocene extensional stages during the last 5Myr. The evolution of the Nazca plate subduction from a flat slab to a normal dip induced an input of fluid mobile elements and asthenosphere plume-like mantle source beneath the Patagonian lithosphere, which yields the observed intraplate signature. We also interpret this geodynamic evolution as the influence of extensive processes in the upper crust leading to caldera-forming eruptions as observed throughout this province.
publishDate 2010
dc.date.none.fl_str_mv 2010-04
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/11336/98912
Germa, A.; Quidelleur, X.; Gillot, P.Y.; Tchilinguirian, Pablo; Volcanic evolution of the back-arc Pleistocene Payun Matru volcanic field (Argentina); Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 29; 3; 4-2010; 717-730
0895-9811
CONICET Digital
CONICET
url http://hdl.handle.net/11336/98912
identifier_str_mv Germa, A.; Quidelleur, X.; Gillot, P.Y.; Tchilinguirian, Pablo; Volcanic evolution of the back-arc Pleistocene Payun Matru volcanic field (Argentina); Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 29; 3; 4-2010; 717-730
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/S0895981110000040
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2010.01.002
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
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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