Magnetostratigraphy of the Miocene Las Arcas Formation, Santa María Valley, northwestern Argentina
- Autores
- Spagnuolo, Cecilia Mariel; Georgieff, Sergio Miguel; Rapalini, Augusto Ernesto
- Año de publicación
- 2015
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- 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.
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; Argentina
Fil: 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; Argentina
Fil: 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; Argentina - Materia
-
Magnetostratigraphy
Paleomagnetism
Miocene
Northwestern Argentina - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/12670
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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 Técnicas2025-10-15T15:12:19Zoai: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:34982025-10-15 15:12:19.32CONICET 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 |
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 |
topic |
Magnetostratigraphy Paleomagnetism Miocene Northwestern Argentina |
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 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; Argentina Fil: 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; Argentina Fil: 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; Argentina |
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 |
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CONICET Digital (CONICET) |
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CONICET Digital (CONICET) |
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Consejo Nacional de Investigaciones Científicas y Técnicas |
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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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13.22299 |