The upper mantle beneath Patagonia, Argentina, documented by xenoliths from alkali basalts

Autores
Bjerg, Ernesto Alfredo; Ntaflos, Theodorus; Kurat, G; Dobosi, G; Labudia, Carlos Horacio
Año de publicación
2005
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Mantle xenoliths in alkali basaltic lavas (with ocean-island basalt chemical signatures) and cinder cones occur in several areas of Patagonia. A representative suite of mantle xenoliths was collected in the region between latitudes 40° and 52°S and longitudes 67° and 71°W in the Río Negro, Chubut, and Santa Cruz provinces, Argentina. Mantle xenoliths in Patagonia display distinguishing peculiarities compared with those of other worldwide occurrences. The lithospheric mantle beneath Patagonia, as inferred from chemical variation diagrams, has experienced only minor melt extractions in the garnet peridotite field and more extensive melt extractions in the spinel lherzolite field. Variably intensive cryptic and modal metasomatism affected the lithospheric mantle in this region. Textural evidence shows that the mantle is moderately to strongly tectonized and recrystallized on both the local and the regional scale, with an overall predominance of deformed textural types. Mineral equilibrium indicates a strongly elevated geotherm similar to the southeast Australia and oceanic geotherms, which is not normal for a continental intraplate tectonic setting. Therefore, the properties of the Patagonian samples are probably related to the presence of rising mantle plume(s) in an extensional tectonic setting.
Fil: Bjerg, Ernesto Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Geológico del Sur. Universidad Nacional del Sur. Departamento de Geología. Instituto Geológico del Sur; Argentina
Fil: Ntaflos, Theodorus. University of Vienna. Department of Geological Sciences; Austria
Fil: Kurat, G. University of Vienna. Department of Geological Sciences; Austria
Fil: Dobosi, G. Hungarian Academy of Sciences. Laboratory of Geochemical Research; Hungría
Fil: Labudia, Carlos Horacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Geológico del Sur. Universidad Nacional del Sur. Departamento de Geología. Instituto Geológico del Sur; Argentina
Materia
Alkali Basalts
Garnet
Metasomatism
Patagonia
Upper Mantle
Xenoliths
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/78046
Acceder
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling The upper mantle beneath Patagonia, Argentina, documented by xenoliths from alkali basaltsBjerg, Ernesto AlfredoNtaflos, TheodorusKurat, GDobosi, GLabudia, Carlos HoracioAlkali BasaltsGarnetMetasomatismPatagoniaUpper MantleXenolithshttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Mantle xenoliths in alkali basaltic lavas (with ocean-island basalt chemical signatures) and cinder cones occur in several areas of Patagonia. A representative suite of mantle xenoliths was collected in the region between latitudes 40° and 52°S and longitudes 67° and 71°W in the Río Negro, Chubut, and Santa Cruz provinces, Argentina. Mantle xenoliths in Patagonia display distinguishing peculiarities compared with those of other worldwide occurrences. The lithospheric mantle beneath Patagonia, as inferred from chemical variation diagrams, has experienced only minor melt extractions in the garnet peridotite field and more extensive melt extractions in the spinel lherzolite field. Variably intensive cryptic and modal metasomatism affected the lithospheric mantle in this region. Textural evidence shows that the mantle is moderately to strongly tectonized and recrystallized on both the local and the regional scale, with an overall predominance of deformed textural types. Mineral equilibrium indicates a strongly elevated geotherm similar to the southeast Australia and oceanic geotherms, which is not normal for a continental intraplate tectonic setting. Therefore, the properties of the Patagonian samples are probably related to the presence of rising mantle plume(s) in an extensional tectonic setting.Fil: Bjerg, Ernesto Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Geológico del Sur. Universidad Nacional del Sur. Departamento de Geología. Instituto Geológico del Sur; ArgentinaFil: Ntaflos, Theodorus. University of Vienna. Department of Geological Sciences; AustriaFil: Kurat, G. University of Vienna. Department of Geological Sciences; AustriaFil: Dobosi, G. Hungarian Academy of Sciences. Laboratory of Geochemical Research; HungríaFil: Labudia, Carlos Horacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Geológico del Sur. Universidad Nacional del Sur. Departamento de Geología. Instituto Geológico del Sur; ArgentinaPergamon-Elsevier Science Ltd2005-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/78046Bjerg, Ernesto Alfredo; Ntaflos, Theodorus; Kurat, G; Dobosi, G; Labudia, Carlos Horacio; The upper mantle beneath Patagonia, Argentina, documented by xenoliths from alkali basalts; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 18; 2; 1-2005; 125-1450895-9811CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2004.09.002info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0895981104001051info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:52:47Zoai:ri.conicet.gov.ar:11336/78046instacron: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 09:52:47.225CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv The upper mantle beneath Patagonia, Argentina, documented by xenoliths from alkali basalts
title The upper mantle beneath Patagonia, Argentina, documented by xenoliths from alkali basalts
spellingShingle The upper mantle beneath Patagonia, Argentina, documented by xenoliths from alkali basalts
Bjerg, Ernesto Alfredo
Alkali Basalts
Garnet
Metasomatism
Patagonia
Upper Mantle
Xenoliths
title_short The upper mantle beneath Patagonia, Argentina, documented by xenoliths from alkali basalts
title_full The upper mantle beneath Patagonia, Argentina, documented by xenoliths from alkali basalts
title_fullStr The upper mantle beneath Patagonia, Argentina, documented by xenoliths from alkali basalts
title_full_unstemmed The upper mantle beneath Patagonia, Argentina, documented by xenoliths from alkali basalts
title_sort The upper mantle beneath Patagonia, Argentina, documented by xenoliths from alkali basalts
dc.creator.none.fl_str_mv Bjerg, Ernesto Alfredo
Ntaflos, Theodorus
Kurat, G
Dobosi, G
Labudia, Carlos Horacio
author Bjerg, Ernesto Alfredo
author_facet Bjerg, Ernesto Alfredo
Ntaflos, Theodorus
Kurat, G
Dobosi, G
Labudia, Carlos Horacio
author_role author
author2 Ntaflos, Theodorus
Kurat, G
Dobosi, G
Labudia, Carlos Horacio
author2_role author
author
author
author
dc.subject.none.fl_str_mv Alkali Basalts
Garnet
Metasomatism
Patagonia
Upper Mantle
Xenoliths
topic Alkali Basalts
Garnet
Metasomatism
Patagonia
Upper Mantle
Xenoliths
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Mantle xenoliths in alkali basaltic lavas (with ocean-island basalt chemical signatures) and cinder cones occur in several areas of Patagonia. A representative suite of mantle xenoliths was collected in the region between latitudes 40° and 52°S and longitudes 67° and 71°W in the Río Negro, Chubut, and Santa Cruz provinces, Argentina. Mantle xenoliths in Patagonia display distinguishing peculiarities compared with those of other worldwide occurrences. The lithospheric mantle beneath Patagonia, as inferred from chemical variation diagrams, has experienced only minor melt extractions in the garnet peridotite field and more extensive melt extractions in the spinel lherzolite field. Variably intensive cryptic and modal metasomatism affected the lithospheric mantle in this region. Textural evidence shows that the mantle is moderately to strongly tectonized and recrystallized on both the local and the regional scale, with an overall predominance of deformed textural types. Mineral equilibrium indicates a strongly elevated geotherm similar to the southeast Australia and oceanic geotherms, which is not normal for a continental intraplate tectonic setting. Therefore, the properties of the Patagonian samples are probably related to the presence of rising mantle plume(s) in an extensional tectonic setting.
Fil: Bjerg, Ernesto Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Geológico del Sur. Universidad Nacional del Sur. Departamento de Geología. Instituto Geológico del Sur; Argentina
Fil: Ntaflos, Theodorus. University of Vienna. Department of Geological Sciences; Austria
Fil: Kurat, G. University of Vienna. Department of Geological Sciences; Austria
Fil: Dobosi, G. Hungarian Academy of Sciences. Laboratory of Geochemical Research; Hungría
Fil: Labudia, Carlos Horacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Geológico del Sur. Universidad Nacional del Sur. Departamento de Geología. Instituto Geológico del Sur; Argentina
description Mantle xenoliths in alkali basaltic lavas (with ocean-island basalt chemical signatures) and cinder cones occur in several areas of Patagonia. A representative suite of mantle xenoliths was collected in the region between latitudes 40° and 52°S and longitudes 67° and 71°W in the Río Negro, Chubut, and Santa Cruz provinces, Argentina. Mantle xenoliths in Patagonia display distinguishing peculiarities compared with those of other worldwide occurrences. The lithospheric mantle beneath Patagonia, as inferred from chemical variation diagrams, has experienced only minor melt extractions in the garnet peridotite field and more extensive melt extractions in the spinel lherzolite field. Variably intensive cryptic and modal metasomatism affected the lithospheric mantle in this region. Textural evidence shows that the mantle is moderately to strongly tectonized and recrystallized on both the local and the regional scale, with an overall predominance of deformed textural types. Mineral equilibrium indicates a strongly elevated geotherm similar to the southeast Australia and oceanic geotherms, which is not normal for a continental intraplate tectonic setting. Therefore, the properties of the Patagonian samples are probably related to the presence of rising mantle plume(s) in an extensional tectonic setting.
publishDate 2005
dc.date.none.fl_str_mv 2005-01
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/11336/78046
Bjerg, Ernesto Alfredo; Ntaflos, Theodorus; Kurat, G; Dobosi, G; Labudia, Carlos Horacio; The upper mantle beneath Patagonia, Argentina, documented by xenoliths from alkali basalts; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 18; 2; 1-2005; 125-145
0895-9811
CONICET Digital
CONICET
url http://hdl.handle.net/11336/78046
identifier_str_mv Bjerg, Ernesto Alfredo; Ntaflos, Theodorus; Kurat, G; Dobosi, G; Labudia, Carlos Horacio; The upper mantle beneath Patagonia, Argentina, documented by xenoliths from alkali basalts; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 18; 2; 1-2005; 125-145
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/doi/10.1016/j.jsames.2004.09.002
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0895981104001051
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
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
_version_ 1842269181912809472
score 13.13397

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