Sr–Nd isotope data of basement rocks from the northernmost argentine Precordillera and its implications for the early Paleozoic evolution of SW Gondwana margin

Autores
Martina, Federico; Astini, Ricardo Alfredo; Pimentel, Marcio
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The Precordillera terrane (Cuyania) in western Argentina is commonly accepted as an exotic fragmentderived from Laurentia in the Early Paleozoic. Evidence supporting such an interpretation is manly basedon similarities in the sedimentary cover successions and their paleontological content. Little is knownabout the basement of the Precordillera terrane. Its isotopic characterization is essential to betterconstrain the present areal distribution of the terrane and it may provide more insight into the pre-rifting evolution of the Precordillera terrane along the Iapetan margin of Laurentia. We present newSr and Nd isotope data of pre-Late Ordovician meta-igneous rocks from the Río Bonete region in NWArgentina, interpreted as the northernmost extent of the Precordillera. The Nd systematics of the RíoBonete basement rocks including greenschists and metagabbros (εNd(470)¼þ2.14e 0.19;TDM¼0.99e1.2 Ga), a garnet-amphibolite (εNd(470)¼ 0.53;TDM¼1.32 Ga) and a quartz-phyllite (εNd(470)¼ 3.83;TDM¼1.55 Ga), are similar to other pre-Ordovician meta-igneous rocks from Sierra de Umango, Pie dePalo and the Ullum xenoliths, usually interpreted as the basement of the Precordillera terrane. Nd modelages around 1.2 Ga are also typical from the Mesoproterozoic Grenvillian basement of southern NorthAmerica, currently exposed in the Llano region. In addition, the greenschists and metagabbros show arobust correlation with the Late Neoproterozoic Catoctin volcanics in the central Appalachians. The Srisotope data (when not disturbed) also supports this novel interpretation and suggests the presence ofthe Blue Ridge rifting event in Precordillera. According to our interpretation, some lithotypes includedwithin the basement complex of the Río Bonete area belonged to the basement of the Precordilleraterrane supporting previous correlation between both regions.
Fil: Martina, Federico. 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: Astini, Ricardo Alfredo. 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: Pimentel, Marcio. Universidade Do Brasilia. Instituto de Geociencias; Brasil
Materia
Sr-Nd Isotopes
Meta-Igneous Basement Rocks
Río Bonete Region
Precordillera Terrane
Esoproterozoic-Early Paleozoic
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:11336/31893
Acceder
id CONICETDig_58fd8105cd3bcdfcc8bc93a6b132e9d9
oai_identifier_str oai:ri.conicet.gov.ar:11336/31893
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Sr–Nd isotope data of basement rocks from the northernmost argentine Precordillera and its implications for the early Paleozoic evolution of SW Gondwana marginMartina, FedericoAstini, Ricardo AlfredoPimentel, MarcioSr-Nd IsotopesMeta-Igneous Basement RocksRío Bonete RegionPrecordillera TerraneEsoproterozoic-Early Paleozoichttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The Precordillera terrane (Cuyania) in western Argentina is commonly accepted as an exotic fragmentderived from Laurentia in the Early Paleozoic. Evidence supporting such an interpretation is manly basedon similarities in the sedimentary cover successions and their paleontological content. Little is knownabout the basement of the Precordillera terrane. Its isotopic characterization is essential to betterconstrain the present areal distribution of the terrane and it may provide more insight into the pre-rifting evolution of the Precordillera terrane along the Iapetan margin of Laurentia. We present newSr and Nd isotope data of pre-Late Ordovician meta-igneous rocks from the Río Bonete region in NWArgentina, interpreted as the northernmost extent of the Precordillera. The Nd systematics of the RíoBonete basement rocks including greenschists and metagabbros (εNd(470)¼þ2.14e 0.19;TDM¼0.99e1.2 Ga), a garnet-amphibolite (εNd(470)¼ 0.53;TDM¼1.32 Ga) and a quartz-phyllite (εNd(470)¼ 3.83;TDM¼1.55 Ga), are similar to other pre-Ordovician meta-igneous rocks from Sierra de Umango, Pie dePalo and the Ullum xenoliths, usually interpreted as the basement of the Precordillera terrane. Nd modelages around 1.2 Ga are also typical from the Mesoproterozoic Grenvillian basement of southern NorthAmerica, currently exposed in the Llano region. In addition, the greenschists and metagabbros show arobust correlation with the Late Neoproterozoic Catoctin volcanics in the central Appalachians. The Srisotope data (when not disturbed) also supports this novel interpretation and suggests the presence ofthe Blue Ridge rifting event in Precordillera. According to our interpretation, some lithotypes includedwithin the basement complex of the Río Bonete area belonged to the basement of the Precordilleraterrane supporting previous correlation between both regions.Fil: Martina, Federico. 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: Astini, Ricardo Alfredo. 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: Pimentel, Marcio. Universidade Do Brasilia. Instituto de Geociencias; BrasilPergamon-Elsevier Science Ltd.2014-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/31893Pimentel, Marcio; Astini, Ricardo Alfredo; Martina, Federico; Sr–Nd isotope data of basement rocks from the northernmost argentine Precordillera and its implications for the early Paleozoic evolution of SW Gondwana margin; Pergamon-Elsevier Science Ltd.; Journal of South American Earth Sciences; 56; 8-2014; 20-290895-9811CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S089598111400100Xinfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2014.08.006info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:43:25Zoai:ri.conicet.gov.ar:11336/31893instacron: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 09:43:25.758CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Sr–Nd isotope data of basement rocks from the northernmost argentine Precordillera and its implications for the early Paleozoic evolution of SW Gondwana margin
title Sr–Nd isotope data of basement rocks from the northernmost argentine Precordillera and its implications for the early Paleozoic evolution of SW Gondwana margin
spellingShingle Sr–Nd isotope data of basement rocks from the northernmost argentine Precordillera and its implications for the early Paleozoic evolution of SW Gondwana margin
Martina, Federico
Sr-Nd Isotopes
Meta-Igneous Basement Rocks
Río Bonete Region
Precordillera Terrane
Esoproterozoic-Early Paleozoic
title_short Sr–Nd isotope data of basement rocks from the northernmost argentine Precordillera and its implications for the early Paleozoic evolution of SW Gondwana margin
title_full Sr–Nd isotope data of basement rocks from the northernmost argentine Precordillera and its implications for the early Paleozoic evolution of SW Gondwana margin
title_fullStr Sr–Nd isotope data of basement rocks from the northernmost argentine Precordillera and its implications for the early Paleozoic evolution of SW Gondwana margin
title_full_unstemmed Sr–Nd isotope data of basement rocks from the northernmost argentine Precordillera and its implications for the early Paleozoic evolution of SW Gondwana margin
title_sort Sr–Nd isotope data of basement rocks from the northernmost argentine Precordillera and its implications for the early Paleozoic evolution of SW Gondwana margin
dc.creator.none.fl_str_mv Martina, Federico
Astini, Ricardo Alfredo
Pimentel, Marcio
author Martina, Federico
author_facet Martina, Federico
Astini, Ricardo Alfredo
Pimentel, Marcio
author_role author
author2 Astini, Ricardo Alfredo
Pimentel, Marcio
author2_role author
author
dc.subject.none.fl_str_mv Sr-Nd Isotopes
Meta-Igneous Basement Rocks
Río Bonete Region
Precordillera Terrane
Esoproterozoic-Early Paleozoic
topic Sr-Nd Isotopes
Meta-Igneous Basement Rocks
Río Bonete Region
Precordillera Terrane
Esoproterozoic-Early Paleozoic
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 Precordillera terrane (Cuyania) in western Argentina is commonly accepted as an exotic fragmentderived from Laurentia in the Early Paleozoic. Evidence supporting such an interpretation is manly basedon similarities in the sedimentary cover successions and their paleontological content. Little is knownabout the basement of the Precordillera terrane. Its isotopic characterization is essential to betterconstrain the present areal distribution of the terrane and it may provide more insight into the pre-rifting evolution of the Precordillera terrane along the Iapetan margin of Laurentia. We present newSr and Nd isotope data of pre-Late Ordovician meta-igneous rocks from the Río Bonete region in NWArgentina, interpreted as the northernmost extent of the Precordillera. The Nd systematics of the RíoBonete basement rocks including greenschists and metagabbros (εNd(470)¼þ2.14e 0.19;TDM¼0.99e1.2 Ga), a garnet-amphibolite (εNd(470)¼ 0.53;TDM¼1.32 Ga) and a quartz-phyllite (εNd(470)¼ 3.83;TDM¼1.55 Ga), are similar to other pre-Ordovician meta-igneous rocks from Sierra de Umango, Pie dePalo and the Ullum xenoliths, usually interpreted as the basement of the Precordillera terrane. Nd modelages around 1.2 Ga are also typical from the Mesoproterozoic Grenvillian basement of southern NorthAmerica, currently exposed in the Llano region. In addition, the greenschists and metagabbros show arobust correlation with the Late Neoproterozoic Catoctin volcanics in the central Appalachians. The Srisotope data (when not disturbed) also supports this novel interpretation and suggests the presence ofthe Blue Ridge rifting event in Precordillera. According to our interpretation, some lithotypes includedwithin the basement complex of the Río Bonete area belonged to the basement of the Precordilleraterrane supporting previous correlation between both regions.
Fil: Martina, Federico. 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: Astini, Ricardo Alfredo. 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: Pimentel, Marcio. Universidade Do Brasilia. Instituto de Geociencias; Brasil
description The Precordillera terrane (Cuyania) in western Argentina is commonly accepted as an exotic fragmentderived from Laurentia in the Early Paleozoic. Evidence supporting such an interpretation is manly basedon similarities in the sedimentary cover successions and their paleontological content. Little is knownabout the basement of the Precordillera terrane. Its isotopic characterization is essential to betterconstrain the present areal distribution of the terrane and it may provide more insight into the pre-rifting evolution of the Precordillera terrane along the Iapetan margin of Laurentia. We present newSr and Nd isotope data of pre-Late Ordovician meta-igneous rocks from the Río Bonete region in NWArgentina, interpreted as the northernmost extent of the Precordillera. The Nd systematics of the RíoBonete basement rocks including greenschists and metagabbros (εNd(470)¼þ2.14e 0.19;TDM¼0.99e1.2 Ga), a garnet-amphibolite (εNd(470)¼ 0.53;TDM¼1.32 Ga) and a quartz-phyllite (εNd(470)¼ 3.83;TDM¼1.55 Ga), are similar to other pre-Ordovician meta-igneous rocks from Sierra de Umango, Pie dePalo and the Ullum xenoliths, usually interpreted as the basement of the Precordillera terrane. Nd modelages around 1.2 Ga are also typical from the Mesoproterozoic Grenvillian basement of southern NorthAmerica, currently exposed in the Llano region. In addition, the greenschists and metagabbros show arobust correlation with the Late Neoproterozoic Catoctin volcanics in the central Appalachians. The Srisotope data (when not disturbed) also supports this novel interpretation and suggests the presence ofthe Blue Ridge rifting event in Precordillera. According to our interpretation, some lithotypes includedwithin the basement complex of the Río Bonete area belonged to the basement of the Precordilleraterrane supporting previous correlation between both regions.
publishDate 2014
dc.date.none.fl_str_mv 2014-08
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/11336/31893
Pimentel, Marcio; Astini, Ricardo Alfredo; Martina, Federico; Sr–Nd isotope data of basement rocks from the northernmost argentine Precordillera and its implications for the early Paleozoic evolution of SW Gondwana margin; Pergamon-Elsevier Science Ltd.; Journal of South American Earth Sciences; 56; 8-2014; 20-29
0895-9811
CONICET Digital
CONICET
url http://hdl.handle.net/11336/31893
identifier_str_mv Pimentel, Marcio; Astini, Ricardo Alfredo; Martina, Federico; Sr–Nd isotope data of basement rocks from the northernmost argentine Precordillera and its implications for the early Paleozoic evolution of SW Gondwana margin; Pergamon-Elsevier Science Ltd.; Journal of South American Earth Sciences; 56; 8-2014; 20-29
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/url/http://www.sciencedirect.com/science/article/pii/S089598111400100X
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2014.08.006
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 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
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score 13.13397

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