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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/98912
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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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1842269365114765312 |
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13.13397 |