A new limit for the NW Río de la Plata Craton Border at about 24°S (Argentina) detected by Magnetotellurics

Autores
Favetto, Alicia Beatriz; Rocha, Veronica; Pomposiello, Maria Cristina; Garcia, Rodolfo Fernando; Barcelona, Hernan
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Old South American structures constitute a puzzle where the Río de la Plata Craton is the most important clue in the assembly of SW Gondwana. The present study is aimed at characterizing the western border of the Río de la Plata Craton on the basis of magnetotelluric studies. Magnetotelluric (MT) data were acquired along an approximately NW-SE 750km profile at about 24ºS, from the Sub-Andean Ranges in the province of Salta (NW) to the Formosa Province frontier (SE) next to Paraguay River. Distortion and structure dimensionality analysis indicates that MT responses are two-dimensional with a NS strike orientation, consistent with the regional geological strike. A 2-D inversion of the data provided a model showing a lateral discontinuity, possibly associated with cratonic structures. The high resistivity observed (>5000ohm·m), from about the middle of the profile toward its eastern end, may be interpreted as the terranes accreted to the Río de la Plata Craton during Neoproterozoic to Cambrian times, or as the Río de la Plata Craton itself. Along the profile from the surface to a depth of about 10km the resistivity model shows a significant resistivity variation in the structure. The resistive block identified at the western end of the profile represents the Sub-Andean system. The markedly enhanced low-resistivity structure (~1 to 10ohm·m) corresponds to a sedimentary pile whose thickness decreases from NW to SE.
Fil: Favetto, Alicia Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geocronología y Geología Isotopica. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geocronología y Geología Isotópica; Argentina
Fil: Rocha, Veronica. Universidad Nacional de Salta. Facultad de Cs.naturales. Escuela de Geología; Argentina
Fil: Pomposiello, Maria Cristina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geocronología y Geología Isotopica. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geocronología y Geología Isotópica; Argentina
Fil: Garcia, Rodolfo Fernando. Universidad Nacional de Salta. Facultad de Cs.naturales. Escuela de Geología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Barcelona, Hernan. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geocronología y Geología Isotopica. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geocronología y Geología Isotópica; Argentina
Materia
MAGNETOTELLURIC
RÍO DE LA PLATA CRATON
NORTH ARGENTINA
FORMOSA
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:11336/43070
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/43070
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling A new limit for the NW Río de la Plata Craton Border at about 24°S (Argentina) detected by MagnetotelluricsFavetto, Alicia BeatrizRocha, VeronicaPomposiello, Maria CristinaGarcia, Rodolfo FernandoBarcelona, HernanMAGNETOTELLURICRÍO DE LA PLATA CRATONNORTH ARGENTINAFORMOSAhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Old South American structures constitute a puzzle where the Río de la Plata Craton is the most important clue in the assembly of SW Gondwana. The present study is aimed at characterizing the western border of the Río de la Plata Craton on the basis of magnetotelluric studies. Magnetotelluric (MT) data were acquired along an approximately NW-SE 750km profile at about 24ºS, from the Sub-Andean Ranges in the province of Salta (NW) to the Formosa Province frontier (SE) next to Paraguay River. Distortion and structure dimensionality analysis indicates that MT responses are two-dimensional with a NS strike orientation, consistent with the regional geological strike. A 2-D inversion of the data provided a model showing a lateral discontinuity, possibly associated with cratonic structures. The high resistivity observed (>5000ohm·m), from about the middle of the profile toward its eastern end, may be interpreted as the terranes accreted to the Río de la Plata Craton during Neoproterozoic to Cambrian times, or as the Río de la Plata Craton itself. Along the profile from the surface to a depth of about 10km the resistivity model shows a significant resistivity variation in the structure. The resistive block identified at the western end of the profile represents the Sub-Andean system. The markedly enhanced low-resistivity structure (~1 to 10ohm·m) corresponds to a sedimentary pile whose thickness decreases from NW to SE.Fil: Favetto, Alicia Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geocronología y Geología Isotopica. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geocronología y Geología Isotópica; ArgentinaFil: Rocha, Veronica. Universidad Nacional de Salta. Facultad de Cs.naturales. Escuela de Geología; ArgentinaFil: Pomposiello, Maria Cristina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geocronología y Geología Isotopica. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geocronología y Geología Isotópica; ArgentinaFil: Garcia, Rodolfo Fernando. Universidad Nacional de Salta. Facultad de Cs.naturales. Escuela de Geología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Barcelona, Hernan. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geocronología y Geología Isotopica. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geocronología y Geología Isotópica; ArgentinaUniversidad de Barcelona2015-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/43070Favetto, Alicia Beatriz; Rocha, Veronica; Pomposiello, Maria Cristina; Garcia, Rodolfo Fernando; Barcelona, Hernan; A new limit for the NW Río de la Plata Craton Border at about 24°S (Argentina) detected by Magnetotellurics; Universidad de Barcelona; Geologica Acta; 13; 3; 9-2015; 243-2541695-61331696-5728CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1344/GeologicaActa2015.13.3.6info:eu-repo/semantics/altIdentifier/url/http://revistes.ub.edu/index.php/GEOACTA/article/view/GeologicaActa2015.13.3.6info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:17:38Zoai:ri.conicet.gov.ar:11336/43070instacron: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:34982025-10-15 15:17:38.595CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A new limit for the NW Río de la Plata Craton Border at about 24°S (Argentina) detected by Magnetotellurics
title A new limit for the NW Río de la Plata Craton Border at about 24°S (Argentina) detected by Magnetotellurics
spellingShingle A new limit for the NW Río de la Plata Craton Border at about 24°S (Argentina) detected by Magnetotellurics
Favetto, Alicia Beatriz
MAGNETOTELLURIC
RÍO DE LA PLATA CRATON
NORTH ARGENTINA
FORMOSA
title_short A new limit for the NW Río de la Plata Craton Border at about 24°S (Argentina) detected by Magnetotellurics
title_full A new limit for the NW Río de la Plata Craton Border at about 24°S (Argentina) detected by Magnetotellurics
title_fullStr A new limit for the NW Río de la Plata Craton Border at about 24°S (Argentina) detected by Magnetotellurics
title_full_unstemmed A new limit for the NW Río de la Plata Craton Border at about 24°S (Argentina) detected by Magnetotellurics
title_sort A new limit for the NW Río de la Plata Craton Border at about 24°S (Argentina) detected by Magnetotellurics
dc.creator.none.fl_str_mv Favetto, Alicia Beatriz
Rocha, Veronica
Pomposiello, Maria Cristina
Garcia, Rodolfo Fernando
Barcelona, Hernan
author Favetto, Alicia Beatriz
author_facet Favetto, Alicia Beatriz
Rocha, Veronica
Pomposiello, Maria Cristina
Garcia, Rodolfo Fernando
Barcelona, Hernan
author_role author
author2 Rocha, Veronica
Pomposiello, Maria Cristina
Garcia, Rodolfo Fernando
Barcelona, Hernan
author2_role author
author
author
author
dc.subject.none.fl_str_mv MAGNETOTELLURIC
RÍO DE LA PLATA CRATON
NORTH ARGENTINA
FORMOSA
topic MAGNETOTELLURIC
RÍO DE LA PLATA CRATON
NORTH ARGENTINA
FORMOSA
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Old South American structures constitute a puzzle where the Río de la Plata Craton is the most important clue in the assembly of SW Gondwana. The present study is aimed at characterizing the western border of the Río de la Plata Craton on the basis of magnetotelluric studies. Magnetotelluric (MT) data were acquired along an approximately NW-SE 750km profile at about 24ºS, from the Sub-Andean Ranges in the province of Salta (NW) to the Formosa Province frontier (SE) next to Paraguay River. Distortion and structure dimensionality analysis indicates that MT responses are two-dimensional with a NS strike orientation, consistent with the regional geological strike. A 2-D inversion of the data provided a model showing a lateral discontinuity, possibly associated with cratonic structures. The high resistivity observed (>5000ohm·m), from about the middle of the profile toward its eastern end, may be interpreted as the terranes accreted to the Río de la Plata Craton during Neoproterozoic to Cambrian times, or as the Río de la Plata Craton itself. Along the profile from the surface to a depth of about 10km the resistivity model shows a significant resistivity variation in the structure. The resistive block identified at the western end of the profile represents the Sub-Andean system. The markedly enhanced low-resistivity structure (~1 to 10ohm·m) corresponds to a sedimentary pile whose thickness decreases from NW to SE.
Fil: Favetto, Alicia Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geocronología y Geología Isotopica. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geocronología y Geología Isotópica; Argentina
Fil: Rocha, Veronica. Universidad Nacional de Salta. Facultad de Cs.naturales. Escuela de Geología; Argentina
Fil: Pomposiello, Maria Cristina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geocronología y Geología Isotopica. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geocronología y Geología Isotópica; Argentina
Fil: Garcia, Rodolfo Fernando. Universidad Nacional de Salta. Facultad de Cs.naturales. Escuela de Geología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Barcelona, Hernan. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geocronología y Geología Isotopica. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geocronología y Geología Isotópica; Argentina
description Old South American structures constitute a puzzle where the Río de la Plata Craton is the most important clue in the assembly of SW Gondwana. The present study is aimed at characterizing the western border of the Río de la Plata Craton on the basis of magnetotelluric studies. Magnetotelluric (MT) data were acquired along an approximately NW-SE 750km profile at about 24ºS, from the Sub-Andean Ranges in the province of Salta (NW) to the Formosa Province frontier (SE) next to Paraguay River. Distortion and structure dimensionality analysis indicates that MT responses are two-dimensional with a NS strike orientation, consistent with the regional geological strike. A 2-D inversion of the data provided a model showing a lateral discontinuity, possibly associated with cratonic structures. The high resistivity observed (>5000ohm·m), from about the middle of the profile toward its eastern end, may be interpreted as the terranes accreted to the Río de la Plata Craton during Neoproterozoic to Cambrian times, or as the Río de la Plata Craton itself. Along the profile from the surface to a depth of about 10km the resistivity model shows a significant resistivity variation in the structure. The resistive block identified at the western end of the profile represents the Sub-Andean system. The markedly enhanced low-resistivity structure (~1 to 10ohm·m) corresponds to a sedimentary pile whose thickness decreases from NW to SE.
publishDate 2015
dc.date.none.fl_str_mv 2015-09
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/11336/43070
Favetto, Alicia Beatriz; Rocha, Veronica; Pomposiello, Maria Cristina; Garcia, Rodolfo Fernando; Barcelona, Hernan; A new limit for the NW Río de la Plata Craton Border at about 24°S (Argentina) detected by Magnetotellurics; Universidad de Barcelona; Geologica Acta; 13; 3; 9-2015; 243-254
1695-6133
1696-5728
CONICET Digital
CONICET
url http://hdl.handle.net/11336/43070
identifier_str_mv Favetto, Alicia Beatriz; Rocha, Veronica; Pomposiello, Maria Cristina; Garcia, Rodolfo Fernando; Barcelona, Hernan; A new limit for the NW Río de la Plata Craton Border at about 24°S (Argentina) detected by Magnetotellurics; Universidad de Barcelona; Geologica Acta; 13; 3; 9-2015; 243-254
1695-6133
1696-5728
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1344/GeologicaActa2015.13.3.6
info:eu-repo/semantics/altIdentifier/url/http://revistes.ub.edu/index.php/GEOACTA/article/view/GeologicaActa2015.13.3.6
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
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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
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Universidad de Barcelona
publisher.none.fl_str_mv Universidad de Barcelona
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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