Correlation Between Disequilibrium Features and Mineral Chemistry at the Miocene Trayén Niyeu Volcano, Somún Curá Plateau, Northern Patagonia, Argentina

Autores
Cordenons, Pablo Damián
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The Miocene Trayén Niyeu volcano (TNV) is the largest post-plateau volcanic building at the westernmost ranges of the mainly Oligocene Somún Curá volcanic shield. The TNV is formed by a large orthopyroxenebearing basandesitic lava field of fissural characteristics, that later on develops a central strombolian dacitic-pyroclastic edifice. Most of TNV’s lavas reveal intense disequilibrium textures and microenclaves, that increase towards the top of the sequence. Three interacting paragenesis were interpreted from detailed petrography and mineral semi-quantitative chemistry, that cannot be ascribed to a single fractional crystallization trend: a) A basic paragenesis, with ~En75, chromium-rich orthopyroxene and ~An55 plagioclase phenocrysts; b) A hybrid magma paragenesis, involving ~Ab75 plagioclase, biotite, amphibole and apatite phenocrysts; and c) A highly differentiated paragenesis, composed of sanidine, biotite and quartz phenocrysts. These three paragenetic assemblages interact at different levels, producing a wide range of disequilibrium textures and geochemical scatter. Trayén Niyeu’s effusive style may be a key for the understanding of subduction-related geochemical signals at the Somún Curá magmatic event.
Fil: Cordenons, Pablo Damián. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Basicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Basicas, Aplicadas y Ambientales de Buenos Aires; Argentina
Materia
Disequilibrium
Crystal Morphology
Somún Curá
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:11336/18649
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Correlation Between Disequilibrium Features and Mineral Chemistry at the Miocene Trayén Niyeu Volcano, Somún Curá Plateau, Northern Patagonia, ArgentinaCordenons, Pablo DamiánDisequilibriumCrystal MorphologySomún Curáhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1https://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The Miocene Trayén Niyeu volcano (TNV) is the largest post-plateau volcanic building at the westernmost ranges of the mainly Oligocene Somún Curá volcanic shield. The TNV is formed by a large orthopyroxenebearing basandesitic lava field of fissural characteristics, that later on develops a central strombolian dacitic-pyroclastic edifice. Most of TNV’s lavas reveal intense disequilibrium textures and microenclaves, that increase towards the top of the sequence. Three interacting paragenesis were interpreted from detailed petrography and mineral semi-quantitative chemistry, that cannot be ascribed to a single fractional crystallization trend: a) A basic paragenesis, with ~En75, chromium-rich orthopyroxene and ~An55 plagioclase phenocrysts; b) A hybrid magma paragenesis, involving ~Ab75 plagioclase, biotite, amphibole and apatite phenocrysts; and c) A highly differentiated paragenesis, composed of sanidine, biotite and quartz phenocrysts. These three paragenetic assemblages interact at different levels, producing a wide range of disequilibrium textures and geochemical scatter. Trayén Niyeu’s effusive style may be a key for the understanding of subduction-related geochemical signals at the Somún Curá magmatic event.Fil: Cordenons, Pablo Damián. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Basicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Basicas, Aplicadas y Ambientales de Buenos Aires; ArgentinaIstituto Nazionale Di Oceanografia E Di Geofisica2013-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/18649Cordenons, Pablo Damián; Correlation Between Disequilibrium Features and Mineral Chemistry at the Miocene Trayén Niyeu Volcano, Somún Curá Plateau, Northern Patagonia, Argentina; Istituto Nazionale Di Oceanografia E Di Geofisica; Bollettino Di Geofisica Teorica Ed Applicata; 54; Supplement 2; 11-2013; 148-1520006-6729CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www3.ogs.trieste.it/bgta/pdf/Geosur2013.pdfinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:08:45Zoai:ri.conicet.gov.ar:11336/18649instacron: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:34982025-10-22 11:08:45.893CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Correlation Between Disequilibrium Features and Mineral Chemistry at the Miocene Trayén Niyeu Volcano, Somún Curá Plateau, Northern Patagonia, Argentina
title Correlation Between Disequilibrium Features and Mineral Chemistry at the Miocene Trayén Niyeu Volcano, Somún Curá Plateau, Northern Patagonia, Argentina
spellingShingle Correlation Between Disequilibrium Features and Mineral Chemistry at the Miocene Trayén Niyeu Volcano, Somún Curá Plateau, Northern Patagonia, Argentina
Cordenons, Pablo Damián
Disequilibrium
Crystal Morphology
Somún Curá
title_short Correlation Between Disequilibrium Features and Mineral Chemistry at the Miocene Trayén Niyeu Volcano, Somún Curá Plateau, Northern Patagonia, Argentina
title_full Correlation Between Disequilibrium Features and Mineral Chemistry at the Miocene Trayén Niyeu Volcano, Somún Curá Plateau, Northern Patagonia, Argentina
title_fullStr Correlation Between Disequilibrium Features and Mineral Chemistry at the Miocene Trayén Niyeu Volcano, Somún Curá Plateau, Northern Patagonia, Argentina
title_full_unstemmed Correlation Between Disequilibrium Features and Mineral Chemistry at the Miocene Trayén Niyeu Volcano, Somún Curá Plateau, Northern Patagonia, Argentina
title_sort Correlation Between Disequilibrium Features and Mineral Chemistry at the Miocene Trayén Niyeu Volcano, Somún Curá Plateau, Northern Patagonia, Argentina
dc.creator.none.fl_str_mv Cordenons, Pablo Damián
author Cordenons, Pablo Damián
author_facet Cordenons, Pablo Damián
author_role author
dc.subject.none.fl_str_mv Disequilibrium
Crystal Morphology
Somún Curá
topic Disequilibrium
Crystal Morphology
Somún Curá
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The Miocene Trayén Niyeu volcano (TNV) is the largest post-plateau volcanic building at the westernmost ranges of the mainly Oligocene Somún Curá volcanic shield. The TNV is formed by a large orthopyroxenebearing basandesitic lava field of fissural characteristics, that later on develops a central strombolian dacitic-pyroclastic edifice. Most of TNV’s lavas reveal intense disequilibrium textures and microenclaves, that increase towards the top of the sequence. Three interacting paragenesis were interpreted from detailed petrography and mineral semi-quantitative chemistry, that cannot be ascribed to a single fractional crystallization trend: a) A basic paragenesis, with ~En75, chromium-rich orthopyroxene and ~An55 plagioclase phenocrysts; b) A hybrid magma paragenesis, involving ~Ab75 plagioclase, biotite, amphibole and apatite phenocrysts; and c) A highly differentiated paragenesis, composed of sanidine, biotite and quartz phenocrysts. These three paragenetic assemblages interact at different levels, producing a wide range of disequilibrium textures and geochemical scatter. Trayén Niyeu’s effusive style may be a key for the understanding of subduction-related geochemical signals at the Somún Curá magmatic event.
Fil: Cordenons, Pablo Damián. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Basicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Basicas, Aplicadas y Ambientales de Buenos Aires; Argentina
description The Miocene Trayén Niyeu volcano (TNV) is the largest post-plateau volcanic building at the westernmost ranges of the mainly Oligocene Somún Curá volcanic shield. The TNV is formed by a large orthopyroxenebearing basandesitic lava field of fissural characteristics, that later on develops a central strombolian dacitic-pyroclastic edifice. Most of TNV’s lavas reveal intense disequilibrium textures and microenclaves, that increase towards the top of the sequence. Three interacting paragenesis were interpreted from detailed petrography and mineral semi-quantitative chemistry, that cannot be ascribed to a single fractional crystallization trend: a) A basic paragenesis, with ~En75, chromium-rich orthopyroxene and ~An55 plagioclase phenocrysts; b) A hybrid magma paragenesis, involving ~Ab75 plagioclase, biotite, amphibole and apatite phenocrysts; and c) A highly differentiated paragenesis, composed of sanidine, biotite and quartz phenocrysts. These three paragenetic assemblages interact at different levels, producing a wide range of disequilibrium textures and geochemical scatter. Trayén Niyeu’s effusive style may be a key for the understanding of subduction-related geochemical signals at the Somún Curá magmatic event.
publishDate 2013
dc.date.none.fl_str_mv 2013-11
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/11336/18649
Cordenons, Pablo Damián; Correlation Between Disequilibrium Features and Mineral Chemistry at the Miocene Trayén Niyeu Volcano, Somún Curá Plateau, Northern Patagonia, Argentina; Istituto Nazionale Di Oceanografia E Di Geofisica; Bollettino Di Geofisica Teorica Ed Applicata; 54; Supplement 2; 11-2013; 148-152
0006-6729
CONICET Digital
CONICET
url http://hdl.handle.net/11336/18649
identifier_str_mv Cordenons, Pablo Damián; Correlation Between Disequilibrium Features and Mineral Chemistry at the Miocene Trayén Niyeu Volcano, Somún Curá Plateau, Northern Patagonia, Argentina; Istituto Nazionale Di Oceanografia E Di Geofisica; Bollettino Di Geofisica Teorica Ed Applicata; 54; Supplement 2; 11-2013; 148-152
0006-6729
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www3.ogs.trieste.it/bgta/pdf/Geosur2013.pdf
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 Istituto Nazionale Di Oceanografia E Di Geofisica
publisher.none.fl_str_mv Istituto Nazionale Di Oceanografia E Di Geofisica
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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score 12.982451

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