Payenia volcanic province, southern Mendoza, Argentina: OIB mantle upwelling in a backarc environment

Autores
Soager, Nina; Holm, Paul Martin; Llambias, Eduardo Jorge
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The Pleistocene to Holocene Payenia volcanic province is a backarc region of 60,000 km2 in Mendoza, Argentina, which is dominated by transitional to alkaline basalts and trachybasalts. We present major and trace element compositions of 139 rocks from this area of which the majority are basaltic rocks with 4 to 12 wt.% MgO and 44 to 50 wt.% SiO2. The southern Payenia province is dominated by intraplate basalts and the trace element patterns of the Río Colorado and Payún Matrú lavas suggest little or no influence from subducted slab components. The mantle source of these rocks is similar to some EM-1 ocean island basalts. In contrast, the magmas from the northern Payenia province and the Andean retroarc occurrences have received an important input from the subducting slab and their trace element patterns are transitional between intraplate and arc rocks. These magmas are mainly derived from another asthenospheric mantle source which may be similar to normal MORB mantle. The Nevado and Northern Segment basalts have presumably been formed above a shallowly subducting slab and the progression of volcanism from south to north and northwest along the San Rafael block likely marks the downwarping of the slab and the end of the shallow subduction period. The downwarping slab may have generated an enhanced mantle upwelling of both the intraplate and the MORB-like mantle sources. In samples from almost all parts of the Payenia province and in particular many Nevado, Llancanelo and older Payún Matrú basalts, trace element variations suggest a significant contribution from lower crustal melts, possibly up to 70% in the most extreme cases. The contaminating lower crustal rocks must have been depleted mafic rocks with a plagioclase component. The extensive melting of lower crust is probably related to the low thickness of the lithospheric mantle and preheating of the lower crust by earlier Mio-Pliocene volcanism. Rare earth element modelling of mantle melting calls for enriched source compositions and a beginning of melting within the garnet stability field for all Payenia basalts. The Río Colorado and Payún Matrú basalts indicate high solidus pressures around 3–3.1 GPa which requires either a thermal or compositional mantle anomaly. The model suggests a thinner lithosphere in the western Payenia region compared to the eastern.
Fil: Soager, Nina. Universidad de Copenhagen; Dinamarca
Fil: Holm, Paul Martin. Universidad de Copenhagen; Dinamarca
Fil: Llambias, Eduardo Jorge. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
Intraplate Basalts
Backarc Volcanism
Shallow Subduction
Crustal Contamination
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:11336/24368

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oai_identifier_str oai:ri.conicet.gov.ar:11336/24368
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network_name_str CONICET Digital (CONICET)
spelling Payenia volcanic province, southern Mendoza, Argentina: OIB mantle upwelling in a backarc environmentSoager, NinaHolm, Paul MartinLlambias, Eduardo JorgeIntraplate BasaltsBackarc VolcanismShallow SubductionCrustal Contaminationhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The Pleistocene to Holocene Payenia volcanic province is a backarc region of 60,000 km2 in Mendoza, Argentina, which is dominated by transitional to alkaline basalts and trachybasalts. We present major and trace element compositions of 139 rocks from this area of which the majority are basaltic rocks with 4 to 12 wt.% MgO and 44 to 50 wt.% SiO2. The southern Payenia province is dominated by intraplate basalts and the trace element patterns of the Río Colorado and Payún Matrú lavas suggest little or no influence from subducted slab components. The mantle source of these rocks is similar to some EM-1 ocean island basalts. In contrast, the magmas from the northern Payenia province and the Andean retroarc occurrences have received an important input from the subducting slab and their trace element patterns are transitional between intraplate and arc rocks. These magmas are mainly derived from another asthenospheric mantle source which may be similar to normal MORB mantle. The Nevado and Northern Segment basalts have presumably been formed above a shallowly subducting slab and the progression of volcanism from south to north and northwest along the San Rafael block likely marks the downwarping of the slab and the end of the shallow subduction period. The downwarping slab may have generated an enhanced mantle upwelling of both the intraplate and the MORB-like mantle sources. In samples from almost all parts of the Payenia province and in particular many Nevado, Llancanelo and older Payún Matrú basalts, trace element variations suggest a significant contribution from lower crustal melts, possibly up to 70% in the most extreme cases. The contaminating lower crustal rocks must have been depleted mafic rocks with a plagioclase component. The extensive melting of lower crust is probably related to the low thickness of the lithospheric mantle and preheating of the lower crust by earlier Mio-Pliocene volcanism. Rare earth element modelling of mantle melting calls for enriched source compositions and a beginning of melting within the garnet stability field for all Payenia basalts. The Río Colorado and Payún Matrú basalts indicate high solidus pressures around 3–3.1 GPa which requires either a thermal or compositional mantle anomaly. The model suggests a thinner lithosphere in the western Payenia region compared to the eastern.Fil: Soager, Nina. Universidad de Copenhagen; DinamarcaFil: Holm, Paul Martin. Universidad de Copenhagen; DinamarcaFil: Llambias, Eduardo Jorge. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaElsevier Science2013-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/24368Soager, Nina; Holm, Paul Martin; Llambias, Eduardo Jorge; Payenia volcanic province, southern Mendoza, Argentina: OIB mantle upwelling in a backarc environment; Elsevier Science; Chemical Geology; 349-350; 6-2013; 36-530009-2541CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.chemgeo.2013.04.007info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0009254113001502info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:49:51Zoai:ri.conicet.gov.ar:11336/24368instacron: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 09:49:51.4CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Payenia volcanic province, southern Mendoza, Argentina: OIB mantle upwelling in a backarc environment
title Payenia volcanic province, southern Mendoza, Argentina: OIB mantle upwelling in a backarc environment
spellingShingle Payenia volcanic province, southern Mendoza, Argentina: OIB mantle upwelling in a backarc environment
Soager, Nina
Intraplate Basalts
Backarc Volcanism
Shallow Subduction
Crustal Contamination
title_short Payenia volcanic province, southern Mendoza, Argentina: OIB mantle upwelling in a backarc environment
title_full Payenia volcanic province, southern Mendoza, Argentina: OIB mantle upwelling in a backarc environment
title_fullStr Payenia volcanic province, southern Mendoza, Argentina: OIB mantle upwelling in a backarc environment
title_full_unstemmed Payenia volcanic province, southern Mendoza, Argentina: OIB mantle upwelling in a backarc environment
title_sort Payenia volcanic province, southern Mendoza, Argentina: OIB mantle upwelling in a backarc environment
dc.creator.none.fl_str_mv Soager, Nina
Holm, Paul Martin
Llambias, Eduardo Jorge
author Soager, Nina
author_facet Soager, Nina
Holm, Paul Martin
Llambias, Eduardo Jorge
author_role author
author2 Holm, Paul Martin
Llambias, Eduardo Jorge
author2_role author
author
dc.subject.none.fl_str_mv Intraplate Basalts
Backarc Volcanism
Shallow Subduction
Crustal Contamination
topic Intraplate Basalts
Backarc Volcanism
Shallow Subduction
Crustal Contamination
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 Pleistocene to Holocene Payenia volcanic province is a backarc region of 60,000 km2 in Mendoza, Argentina, which is dominated by transitional to alkaline basalts and trachybasalts. We present major and trace element compositions of 139 rocks from this area of which the majority are basaltic rocks with 4 to 12 wt.% MgO and 44 to 50 wt.% SiO2. The southern Payenia province is dominated by intraplate basalts and the trace element patterns of the Río Colorado and Payún Matrú lavas suggest little or no influence from subducted slab components. The mantle source of these rocks is similar to some EM-1 ocean island basalts. In contrast, the magmas from the northern Payenia province and the Andean retroarc occurrences have received an important input from the subducting slab and their trace element patterns are transitional between intraplate and arc rocks. These magmas are mainly derived from another asthenospheric mantle source which may be similar to normal MORB mantle. The Nevado and Northern Segment basalts have presumably been formed above a shallowly subducting slab and the progression of volcanism from south to north and northwest along the San Rafael block likely marks the downwarping of the slab and the end of the shallow subduction period. The downwarping slab may have generated an enhanced mantle upwelling of both the intraplate and the MORB-like mantle sources. In samples from almost all parts of the Payenia province and in particular many Nevado, Llancanelo and older Payún Matrú basalts, trace element variations suggest a significant contribution from lower crustal melts, possibly up to 70% in the most extreme cases. The contaminating lower crustal rocks must have been depleted mafic rocks with a plagioclase component. The extensive melting of lower crust is probably related to the low thickness of the lithospheric mantle and preheating of the lower crust by earlier Mio-Pliocene volcanism. Rare earth element modelling of mantle melting calls for enriched source compositions and a beginning of melting within the garnet stability field for all Payenia basalts. The Río Colorado and Payún Matrú basalts indicate high solidus pressures around 3–3.1 GPa which requires either a thermal or compositional mantle anomaly. The model suggests a thinner lithosphere in the western Payenia region compared to the eastern.
Fil: Soager, Nina. Universidad de Copenhagen; Dinamarca
Fil: Holm, Paul Martin. Universidad de Copenhagen; Dinamarca
Fil: Llambias, Eduardo Jorge. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description The Pleistocene to Holocene Payenia volcanic province is a backarc region of 60,000 km2 in Mendoza, Argentina, which is dominated by transitional to alkaline basalts and trachybasalts. We present major and trace element compositions of 139 rocks from this area of which the majority are basaltic rocks with 4 to 12 wt.% MgO and 44 to 50 wt.% SiO2. The southern Payenia province is dominated by intraplate basalts and the trace element patterns of the Río Colorado and Payún Matrú lavas suggest little or no influence from subducted slab components. The mantle source of these rocks is similar to some EM-1 ocean island basalts. In contrast, the magmas from the northern Payenia province and the Andean retroarc occurrences have received an important input from the subducting slab and their trace element patterns are transitional between intraplate and arc rocks. These magmas are mainly derived from another asthenospheric mantle source which may be similar to normal MORB mantle. The Nevado and Northern Segment basalts have presumably been formed above a shallowly subducting slab and the progression of volcanism from south to north and northwest along the San Rafael block likely marks the downwarping of the slab and the end of the shallow subduction period. The downwarping slab may have generated an enhanced mantle upwelling of both the intraplate and the MORB-like mantle sources. In samples from almost all parts of the Payenia province and in particular many Nevado, Llancanelo and older Payún Matrú basalts, trace element variations suggest a significant contribution from lower crustal melts, possibly up to 70% in the most extreme cases. The contaminating lower crustal rocks must have been depleted mafic rocks with a plagioclase component. The extensive melting of lower crust is probably related to the low thickness of the lithospheric mantle and preheating of the lower crust by earlier Mio-Pliocene volcanism. Rare earth element modelling of mantle melting calls for enriched source compositions and a beginning of melting within the garnet stability field for all Payenia basalts. The Río Colorado and Payún Matrú basalts indicate high solidus pressures around 3–3.1 GPa which requires either a thermal or compositional mantle anomaly. The model suggests a thinner lithosphere in the western Payenia region compared to the eastern.
publishDate 2013
dc.date.none.fl_str_mv 2013-06
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/11336/24368
Soager, Nina; Holm, Paul Martin; Llambias, Eduardo Jorge; Payenia volcanic province, southern Mendoza, Argentina: OIB mantle upwelling in a backarc environment; Elsevier Science; Chemical Geology; 349-350; 6-2013; 36-53
0009-2541
CONICET Digital
CONICET
url http://hdl.handle.net/11336/24368
identifier_str_mv Soager, Nina; Holm, Paul Martin; Llambias, Eduardo Jorge; Payenia volcanic province, southern Mendoza, Argentina: OIB mantle upwelling in a backarc environment; Elsevier Science; Chemical Geology; 349-350; 6-2013; 36-53
0009-2541
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.chemgeo.2013.04.007
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0009254113001502
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 Elsevier Science
publisher.none.fl_str_mv Elsevier Science
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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