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
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/230289
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling 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 Técnicas2025-09-29T09:55:17Zoai: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:34982025-09-29 09:55:17.472CONICET 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
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv 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
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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