Magnetostratigraphy of the Miocene Las Arcas Formation, Santa María Valley, northwestern Argentina

The first magnetostratigraphic study of the Las Arcas Formation (Late Miocene) was carried out in Las Totoritas creek (26º12′S; 65º47′W, NW Argentina), a key place in between of two geological provinces: Northwestern Pampean Ranges and Eastern Cordillera, in northwestern Argentina. This was accompan...

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Autores: Spagnuolo, Cecilia Mariel, Georgieff, Sergio Miguel, Rapalini, Augusto Ernesto
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2015
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/12670
Acceso en línea:http://hdl.handle.net/11336/12670
Access Level:acceso abierto
Palabra clave:Magnetostratigraphy
Paleomagnetism
Miocene
Northwestern Argentina
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
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spelling Magnetostratigraphy of the Miocene Las Arcas Formation, Santa María Valley, northwestern ArgentinaSpagnuolo, Cecilia MarielGeorgieff, Sergio MiguelRapalini, Augusto ErnestoMagnetostratigraphyPaleomagnetismMioceneNorthwestern Argentinahttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The first magnetostratigraphic study of the Las Arcas Formation (Late Miocene) was carried out in Las Totoritas creek (26º12′S; 65º47′W, NW Argentina), a key place in between of two geological provinces: Northwestern Pampean Ranges and Eastern Cordillera, in northwestern Argentina. This was accompanied by isotopic dating (9.01 ± 0.12 Ma, 40Ar–39Ar in amphibole) of the unit, obtained from a 3.4 m thick tuff intercalated at ∼45 m above the base. The Las Arcas Formation is 810 m thick at the sampling locality and it is mainly composed of tabular reddish conglomerates, sandstones and siltstones in both coarsening- and thickening-upward arrangements. The exposed section was sampled at 48 sites, 26 of which are interpreted as carrying primary magnetization. The new magnetostratigraphic column was correlated with the Geomagnetic Polarity Time Scale (GPTS), and suggests that deposition of the Las Arcas Formation strata started at around 9.1 Ma and ended around 6.8 Ma. The paleomagnetic pole obtained for this unit (Dec = 8.7° Inc = −43.9° dp = 14.9 dm 9.3) indicates that this area underwent non-significant rotation (11.0° ± 13.6°) since the Late Miocene.Fil: Spagnuolo, Cecilia Mariel. Fundacion Miguel Lillo. Direccion de Geologia. Instituto Sedimentologia; Argentina. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Georgieff, Sergio Miguel. Fundacion Miguel Lillo. Direccion de Geologia. Instituto Sedimentologia; Argentina. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Rapalini, Augusto Ernesto. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; ArgentinaElsevier2015-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/12670Spagnuolo, Cecilia Mariel; Georgieff, Sergio Miguel; Rapalini, Augusto Ernesto; Magnetostratigraphy of the Miocene Las Arcas Formation, Santa María Valley, northwestern Argentina; Elsevier; Journal Of South American Earth Sciences; 63; 11-2015; 101–1130895-9811enginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2015.07.004info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0895981115300201info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2024-05-08T14:05:03Zoai:ri.conicet.gov.ar:11336/12670instacron: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:34982024-05-08 14:05:03.711CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Magnetostratigraphy of the Miocene Las Arcas Formation, Santa María Valley, northwestern Argentina
title Magnetostratigraphy of the Miocene Las Arcas Formation, Santa María Valley, northwestern Argentina
spellingShingle Magnetostratigraphy of the Miocene Las Arcas Formation, Santa María Valley, northwestern Argentina
Spagnuolo, Cecilia Mariel
Magnetostratigraphy
Paleomagnetism
Miocene
Northwestern Argentina
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
title_short Magnetostratigraphy of the Miocene Las Arcas Formation, Santa María Valley, northwestern Argentina
title_full Magnetostratigraphy of the Miocene Las Arcas Formation, Santa María Valley, northwestern Argentina
title_fullStr Magnetostratigraphy of the Miocene Las Arcas Formation, Santa María Valley, northwestern Argentina
title_full_unstemmed Magnetostratigraphy of the Miocene Las Arcas Formation, Santa María Valley, northwestern Argentina
title_sort Magnetostratigraphy of the Miocene Las Arcas Formation, Santa María Valley, northwestern Argentina
dc.creator.none.fl_str_mv Spagnuolo, Cecilia Mariel
Georgieff, Sergio Miguel
Rapalini, Augusto Ernesto
author Spagnuolo, Cecilia Mariel
author_facet Spagnuolo, Cecilia Mariel
Georgieff, Sergio Miguel
Rapalini, Augusto Ernesto
author_role author
author2 Georgieff, Sergio Miguel
Rapalini, Augusto Ernesto
author2_role author
author
dc.subject.none.fl_str_mv Magnetostratigraphy
Paleomagnetism
Miocene
Northwestern Argentina
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
topic Magnetostratigraphy
Paleomagnetism
Miocene
Northwestern Argentina
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
description The first magnetostratigraphic study of the Las Arcas Formation (Late Miocene) was carried out in Las Totoritas creek (26º12′S; 65º47′W, NW Argentina), a key place in between of two geological provinces: Northwestern Pampean Ranges and Eastern Cordillera, in northwestern Argentina. This was accompanied by isotopic dating (9.01 ± 0.12 Ma, 40Ar–39Ar in amphibole) of the unit, obtained from a 3.4 m thick tuff intercalated at ∼45 m above the base. The Las Arcas Formation is 810 m thick at the sampling locality and it is mainly composed of tabular reddish conglomerates, sandstones and siltstones in both coarsening- and thickening-upward arrangements. The exposed section was sampled at 48 sites, 26 of which are interpreted as carrying primary magnetization. The new magnetostratigraphic column was correlated with the Geomagnetic Polarity Time Scale (GPTS), and suggests that deposition of the Las Arcas Formation strata started at around 9.1 Ma and ended around 6.8 Ma. The paleomagnetic pole obtained for this unit (Dec = 8.7° Inc = −43.9° dp = 14.9 dm 9.3) indicates that this area underwent non-significant rotation (11.0° ± 13.6°) since the Late Miocene.
publishDate 2015
dc.date.none.fl_str_mv 2015-11
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/11336/12670
Spagnuolo, Cecilia Mariel; Georgieff, Sergio Miguel; Rapalini, Augusto Ernesto; Magnetostratigraphy of the Miocene Las Arcas Formation, Santa María Valley, northwestern Argentina; Elsevier; Journal Of South American Earth Sciences; 63; 11-2015; 101–113
0895-9811
url http://hdl.handle.net/11336/12670
identifier_str_mv Spagnuolo, Cecilia Mariel; Georgieff, Sergio Miguel; Rapalini, Augusto Ernesto; Magnetostratigraphy of the Miocene Las Arcas Formation, Santa María Valley, northwestern Argentina; Elsevier; Journal Of South American Earth Sciences; 63; 11-2015; 101–113
0895-9811
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.2015.07.004
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0895981115300201
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
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
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 15.198674

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