The Quaternary Payún Matrú caldera, andean back-arc of the Southern Volcanic Zone: insights into its caldera-forming eruption deposits
- Autores
- Hernando, Irene Raquel; Petrinovic, Ivan Alejandro; Gutiérrez, Damián; Bucher, Joaquin; Fuentes, Tomás Gregorio; Aragon, Eugenio
- Año de publicación
- 2019
- Idioma
- inglés
- Tipo de recurso
- documento de conferencia
- Estado
- versión publicada
- Descripción
- The Quaternary Payún Matrú caldera is located in the back-arc of the Southern Volcanic Zone of the Andes, western Argentina, and represents the main volcanic edifice of the Payún Matrú Volcanic Field (PMVF). The PMVF is located within Payenia, a volcanic province characterized by alkalic basaltic volcanism. The PMVF presents the homonym caldera along with the Payún Liso volcano and 220 basaltic monogenetic cones. Payún Matrú has a long-lived pre-caldera stage where a shield-like edifice has been built. The syn-caldera stage is represented by the Pleistocene Portezuelo Ignimbrite and the resulting caldera depression of 8.5 km in diameter. Afterwards the caldera event, volcanism continued mostly along the caldera rim.We present stratigraphic sections, facies analysis and mineralogical studies of the Portezuelo Ignimbrite, in order to determine pre-eruptive conditions, onset of collapse and eruptive history of the caldera-forming eruption deposits. The extra-caldera Portezuelo Ignimbrite shows different facies, being most of them massive or eutaxitic and massive lapilli tuff facies, deposited by dense pyroclastic density currents. Fall deposits are found only restrained to the caldera margin, suggesting the lack of a sustained eruptive column at the onset of eruption. Massive tuff facies are found at the topmost deposits south of the caldera, and indicates the development of a co-ignimbritic plume as the pyroclastic density currents wanned. Four distinct juvenile clasts were recognized on the basis of color, shape, size, vesicularity and crystallinity. These are: gray fiamme, light gray pumice, dark gray pumice and black juveniles. Whole-rock chemical analyses of gray fiamme and black juveniles have a similar trachytic composition, while the mineralogical composition of juvenile clasts reveals some differences, specially in feldspars. On the basis of discontinuity surfaces and the juvenile clasts population of the ignimbrite, several eruptive units were defined. Given the absence of lithic breccias, the onset of collapse is suggested by a change in the juvenile clasts population in the topmost eruptive unit, which presents dark gray and light gray pumice together with black juveniles. The sequential appearance of different juvenile clasts suggests a zoned magma chamber, in terms of crystal content and mineralogical composition.
Fil: Hernando, Irene Raquel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
Fil: Petrinovic, Ivan Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina
Fil: Gutiérrez, Damián. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División geología; Argentina
Fil: Bucher, Joaquin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
Fil: Fuentes, Tomás Gregorio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
Fil: Aragon, Eugenio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
25th Latin American Colloquium
Hamburgo
Alemania
University of Hamburg - Materia
-
Volcanism
Caldera
Payún Matrú - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/230289
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The Quaternary Payún Matrú caldera, andean back-arc of the Southern Volcanic Zone: insights into its caldera-forming eruption depositsHernando, Irene RaquelPetrinovic, Ivan AlejandroGutiérrez, DamiánBucher, JoaquinFuentes, Tomás GregorioAragon, EugenioVolcanismCalderaPayún Matrúhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The Quaternary Payún Matrú caldera is located in the back-arc of the Southern Volcanic Zone of the Andes, western Argentina, and represents the main volcanic edifice of the Payún Matrú Volcanic Field (PMVF). The PMVF is located within Payenia, a volcanic province characterized by alkalic basaltic volcanism. The PMVF presents the homonym caldera along with the Payún Liso volcano and 220 basaltic monogenetic cones. Payún Matrú has a long-lived pre-caldera stage where a shield-like edifice has been built. The syn-caldera stage is represented by the Pleistocene Portezuelo Ignimbrite and the resulting caldera depression of 8.5 km in diameter. Afterwards the caldera event, volcanism continued mostly along the caldera rim.We present stratigraphic sections, facies analysis and mineralogical studies of the Portezuelo Ignimbrite, in order to determine pre-eruptive conditions, onset of collapse and eruptive history of the caldera-forming eruption deposits. The extra-caldera Portezuelo Ignimbrite shows different facies, being most of them massive or eutaxitic and massive lapilli tuff facies, deposited by dense pyroclastic density currents. Fall deposits are found only restrained to the caldera margin, suggesting the lack of a sustained eruptive column at the onset of eruption. Massive tuff facies are found at the topmost deposits south of the caldera, and indicates the development of a co-ignimbritic plume as the pyroclastic density currents wanned. Four distinct juvenile clasts were recognized on the basis of color, shape, size, vesicularity and crystallinity. These are: gray fiamme, light gray pumice, dark gray pumice and black juveniles. Whole-rock chemical analyses of gray fiamme and black juveniles have a similar trachytic composition, while the mineralogical composition of juvenile clasts reveals some differences, specially in feldspars. On the basis of discontinuity surfaces and the juvenile clasts population of the ignimbrite, several eruptive units were defined. Given the absence of lithic breccias, the onset of collapse is suggested by a change in the juvenile clasts population in the topmost eruptive unit, which presents dark gray and light gray pumice together with black juveniles. The sequential appearance of different juvenile clasts suggests a zoned magma chamber, in terms of crystal content and mineralogical composition.Fil: Hernando, Irene Raquel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; ArgentinaFil: Petrinovic, Ivan Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; ArgentinaFil: Gutiérrez, Damián. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División geología; ArgentinaFil: Bucher, Joaquin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; ArgentinaFil: Fuentes, Tomás Gregorio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; ArgentinaFil: Aragon, Eugenio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina25th Latin American ColloquiumHamburgoAlemaniaUniversity of HamburgSchriften GeoUnion Alfred Wegener-StiftungRiller, UlrichGöllner, Paul2019info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectOtroJournalhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/230289The Quaternary Payún Matrú caldera, andean back-arc of the Southern Volcanic Zone: insights into its caldera-forming eruption deposits; 25th Latin American Colloquium; Hamburgo; Alemania; 2019; 50-510946-8978CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://e-docs.geo-leo.de/handle/11858/7935info:eu-repo/semantics/altIdentifier/doi/10.23689/fidgeo-3609Internacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:54:19Zoai:ri.conicet.gov.ar:11336/230289instacron: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 09:54:19.788CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
The Quaternary Payún Matrú caldera, andean back-arc of the Southern Volcanic Zone: insights into its caldera-forming eruption deposits |
title |
The Quaternary Payún Matrú caldera, andean back-arc of the Southern Volcanic Zone: insights into its caldera-forming eruption deposits |
spellingShingle |
The Quaternary Payún Matrú caldera, andean back-arc of the Southern Volcanic Zone: insights into its caldera-forming eruption deposits Hernando, Irene Raquel Volcanism Caldera Payún Matrú |
title_short |
The Quaternary Payún Matrú caldera, andean back-arc of the Southern Volcanic Zone: insights into its caldera-forming eruption deposits |
title_full |
The Quaternary Payún Matrú caldera, andean back-arc of the Southern Volcanic Zone: insights into its caldera-forming eruption deposits |
title_fullStr |
The Quaternary Payún Matrú caldera, andean back-arc of the Southern Volcanic Zone: insights into its caldera-forming eruption deposits |
title_full_unstemmed |
The Quaternary Payún Matrú caldera, andean back-arc of the Southern Volcanic Zone: insights into its caldera-forming eruption deposits |
title_sort |
The Quaternary Payún Matrú caldera, andean back-arc of the Southern Volcanic Zone: insights into its caldera-forming eruption deposits |
dc.creator.none.fl_str_mv |
Hernando, Irene Raquel Petrinovic, Ivan Alejandro Gutiérrez, Damián Bucher, Joaquin Fuentes, Tomás Gregorio Aragon, Eugenio |
author |
Hernando, Irene Raquel |
author_facet |
Hernando, Irene Raquel Petrinovic, Ivan Alejandro Gutiérrez, Damián Bucher, Joaquin Fuentes, Tomás Gregorio Aragon, Eugenio |
author_role |
author |
author2 |
Petrinovic, Ivan Alejandro Gutiérrez, Damián Bucher, Joaquin Fuentes, Tomás Gregorio Aragon, Eugenio |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Riller, Ulrich Göllner, Paul |
dc.subject.none.fl_str_mv |
Volcanism Caldera Payún Matrú |
topic |
Volcanism Caldera Payún Matrú |
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 Quaternary Payún Matrú caldera is located in the back-arc of the Southern Volcanic Zone of the Andes, western Argentina, and represents the main volcanic edifice of the Payún Matrú Volcanic Field (PMVF). The PMVF is located within Payenia, a volcanic province characterized by alkalic basaltic volcanism. The PMVF presents the homonym caldera along with the Payún Liso volcano and 220 basaltic monogenetic cones. Payún Matrú has a long-lived pre-caldera stage where a shield-like edifice has been built. The syn-caldera stage is represented by the Pleistocene Portezuelo Ignimbrite and the resulting caldera depression of 8.5 km in diameter. Afterwards the caldera event, volcanism continued mostly along the caldera rim.We present stratigraphic sections, facies analysis and mineralogical studies of the Portezuelo Ignimbrite, in order to determine pre-eruptive conditions, onset of collapse and eruptive history of the caldera-forming eruption deposits. The extra-caldera Portezuelo Ignimbrite shows different facies, being most of them massive or eutaxitic and massive lapilli tuff facies, deposited by dense pyroclastic density currents. Fall deposits are found only restrained to the caldera margin, suggesting the lack of a sustained eruptive column at the onset of eruption. Massive tuff facies are found at the topmost deposits south of the caldera, and indicates the development of a co-ignimbritic plume as the pyroclastic density currents wanned. Four distinct juvenile clasts were recognized on the basis of color, shape, size, vesicularity and crystallinity. These are: gray fiamme, light gray pumice, dark gray pumice and black juveniles. Whole-rock chemical analyses of gray fiamme and black juveniles have a similar trachytic composition, while the mineralogical composition of juvenile clasts reveals some differences, specially in feldspars. On the basis of discontinuity surfaces and the juvenile clasts population of the ignimbrite, several eruptive units were defined. Given the absence of lithic breccias, the onset of collapse is suggested by a change in the juvenile clasts population in the topmost eruptive unit, which presents dark gray and light gray pumice together with black juveniles. The sequential appearance of different juvenile clasts suggests a zoned magma chamber, in terms of crystal content and mineralogical composition. Fil: Hernando, Irene Raquel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina Fil: Petrinovic, Ivan Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina Fil: Gutiérrez, Damián. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División geología; Argentina Fil: Bucher, Joaquin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina Fil: Fuentes, Tomás Gregorio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina Fil: Aragon, Eugenio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina 25th Latin American Colloquium Hamburgo Alemania University of Hamburg |
description |
The Quaternary Payún Matrú caldera is located in the back-arc of the Southern Volcanic Zone of the Andes, western Argentina, and represents the main volcanic edifice of the Payún Matrú Volcanic Field (PMVF). The PMVF is located within Payenia, a volcanic province characterized by alkalic basaltic volcanism. The PMVF presents the homonym caldera along with the Payún Liso volcano and 220 basaltic monogenetic cones. Payún Matrú has a long-lived pre-caldera stage where a shield-like edifice has been built. The syn-caldera stage is represented by the Pleistocene Portezuelo Ignimbrite and the resulting caldera depression of 8.5 km in diameter. Afterwards the caldera event, volcanism continued mostly along the caldera rim.We present stratigraphic sections, facies analysis and mineralogical studies of the Portezuelo Ignimbrite, in order to determine pre-eruptive conditions, onset of collapse and eruptive history of the caldera-forming eruption deposits. The extra-caldera Portezuelo Ignimbrite shows different facies, being most of them massive or eutaxitic and massive lapilli tuff facies, deposited by dense pyroclastic density currents. Fall deposits are found only restrained to the caldera margin, suggesting the lack of a sustained eruptive column at the onset of eruption. Massive tuff facies are found at the topmost deposits south of the caldera, and indicates the development of a co-ignimbritic plume as the pyroclastic density currents wanned. Four distinct juvenile clasts were recognized on the basis of color, shape, size, vesicularity and crystallinity. These are: gray fiamme, light gray pumice, dark gray pumice and black juveniles. Whole-rock chemical analyses of gray fiamme and black juveniles have a similar trachytic composition, while the mineralogical composition of juvenile clasts reveals some differences, specially in feldspars. On the basis of discontinuity surfaces and the juvenile clasts population of the ignimbrite, several eruptive units were defined. Given the absence of lithic breccias, the onset of collapse is suggested by a change in the juvenile clasts population in the topmost eruptive unit, which presents dark gray and light gray pumice together with black juveniles. The sequential appearance of different juvenile clasts suggests a zoned magma chamber, in terms of crystal content and mineralogical composition. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/conferenceObject Otro Journal 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/11336/230289 The Quaternary Payún Matrú caldera, andean back-arc of the Southern Volcanic Zone: insights into its caldera-forming eruption deposits; 25th Latin American Colloquium; Hamburgo; Alemania; 2019; 50-51 0946-8978 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/230289 |
identifier_str_mv |
The Quaternary Payún Matrú caldera, andean back-arc of the Southern Volcanic Zone: insights into its caldera-forming eruption deposits; 25th Latin American Colloquium; Hamburgo; Alemania; 2019; 50-51 0946-8978 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://e-docs.geo-leo.de/handle/11858/7935 info:eu-repo/semantics/altIdentifier/doi/10.23689/fidgeo-3609 |
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info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/2.5/ar/ |
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openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by/2.5/ar/ |
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application/pdf application/pdf application/pdf |
dc.coverage.none.fl_str_mv |
Internacional |
dc.publisher.none.fl_str_mv |
Schriften GeoUnion Alfred Wegener-Stiftung |
publisher.none.fl_str_mv |
Schriften GeoUnion Alfred Wegener-Stiftung |
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reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
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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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13.13397 |