Geomagnetic secular variations over the last 6500 years as recorded by sediments from the lakes of south Argentina

Autores
Gogorza, Claudia Susana; Sinito, Ana Maria; Vilas, J. F.; Creer, K. M.; Nuñez, H.
Año de publicación
2000
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Regional type curves depicting secular variations in declination and inclination through the last 6700 calendar years constructed for southwestern Argentina (about 41°S, 71°30′W) by stacking palaeomagnetic data derived from lake sediment cores are described and analysed. The data consist of records from four lakes which have been previously studied (El Trebol, Brazo Campanario, Moreno and Escondido), and are here integrated. Within-lake correlation was based on magnetic susceptibility (χ) and intensity of the natural remanent magnetization (NRM). Interlake correlation was derived from declination and inclination patterns and a set of radiocarbon age determinations. The secular variation (SV) of the geomagnetic field was studied using spectral analysis and precession analysis of the magnetic vector. The spectrum obtained from spectral analysis of declination (D) and inclination (I) at the same time shows major peaks at periodicities of about 3400, 1600 and 1200 yr for both parameters. In order to test the stability of the periodicities obtained, spectral analysis has been applied to every 3500-yr time span at intervals of 500 yr for both records. Patterns of circularity during the last 6700 yr appear to recur with a near constant interval of about 2000 yr. Both open and closed loops are associated with clockwise and counter-clockwise circularity.
Fil: Gogorza, Claudia Susana. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto de Física Arroyo Seco; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil; Argentina
Fil: Sinito, Ana Maria. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Tandil. Sede Tandil del Centro de Investigaciones En Fisica E Ingenieria del Centro de la Provincia de Buenos Aires; Argentina. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto de Física Arroyo Seco; Argentina
Fil: Vilas, J. F.. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Geología. Instituto de Geofísica "Daniel Valencio"; Argentina
Fil: Creer, K. M.. University of Edinburgh; Reino Unido
Fil: Nuñez, H.. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina
Materia
HOLOCENE
LAKE SEDIMENTS
PALAEOMAGNETISM
SECULAR VARIATIONS
SOUTH AMERICA
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:11336/163748
Acceder
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network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling Geomagnetic secular variations over the last 6500 years as recorded by sediments from the lakes of south ArgentinaGogorza, Claudia SusanaSinito, Ana MariaVilas, J. F.Creer, K. M.Nuñez, H.HOLOCENELAKE SEDIMENTSPALAEOMAGNETISMSECULAR VARIATIONSSOUTH AMERICAhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Regional type curves depicting secular variations in declination and inclination through the last 6700 calendar years constructed for southwestern Argentina (about 41°S, 71°30′W) by stacking palaeomagnetic data derived from lake sediment cores are described and analysed. The data consist of records from four lakes which have been previously studied (El Trebol, Brazo Campanario, Moreno and Escondido), and are here integrated. Within-lake correlation was based on magnetic susceptibility (χ) and intensity of the natural remanent magnetization (NRM). Interlake correlation was derived from declination and inclination patterns and a set of radiocarbon age determinations. The secular variation (SV) of the geomagnetic field was studied using spectral analysis and precession analysis of the magnetic vector. The spectrum obtained from spectral analysis of declination (D) and inclination (I) at the same time shows major peaks at periodicities of about 3400, 1600 and 1200 yr for both parameters. In order to test the stability of the periodicities obtained, spectral analysis has been applied to every 3500-yr time span at intervals of 500 yr for both records. Patterns of circularity during the last 6700 yr appear to recur with a near constant interval of about 2000 yr. Both open and closed loops are associated with clockwise and counter-clockwise circularity.Fil: Gogorza, Claudia Susana. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto de Física Arroyo Seco; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil; ArgentinaFil: Sinito, Ana Maria. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Tandil. Sede Tandil del Centro de Investigaciones En Fisica E Ingenieria del Centro de la Provincia de Buenos Aires; Argentina. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto de Física Arroyo Seco; ArgentinaFil: Vilas, J. F.. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Geología. Instituto de Geofísica "Daniel Valencio"; ArgentinaFil: Creer, K. M.. University of Edinburgh; Reino UnidoFil: Nuñez, H.. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; ArgentinaWiley Blackwell Publishing, Inc2000-12info: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/11336/163748Gogorza, Claudia Susana; Sinito, Ana Maria; Vilas, J. F.; Creer, K. M.; Nuñez, H.; Geomagnetic secular variations over the last 6500 years as recorded by sediments from the lakes of south Argentina; Wiley Blackwell Publishing, Inc; Geophysical Journal International; 143; 3; 12-2000; 787-7980956-540XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/gji/article/143/3/787/720676?login=falseinfo:eu-repo/semantics/altIdentifier/doi/10.1046/j.1365-246X.2000.00277.xinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:37:03Zoai:ri.conicet.gov.ar:11336/163748instacron: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:34982025-09-29 09:37:03.507CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Geomagnetic secular variations over the last 6500 years as recorded by sediments from the lakes of south Argentina
title Geomagnetic secular variations over the last 6500 years as recorded by sediments from the lakes of south Argentina
spellingShingle Geomagnetic secular variations over the last 6500 years as recorded by sediments from the lakes of south Argentina
Gogorza, Claudia Susana
HOLOCENE
LAKE SEDIMENTS
PALAEOMAGNETISM
SECULAR VARIATIONS
SOUTH AMERICA
title_short Geomagnetic secular variations over the last 6500 years as recorded by sediments from the lakes of south Argentina
title_full Geomagnetic secular variations over the last 6500 years as recorded by sediments from the lakes of south Argentina
title_fullStr Geomagnetic secular variations over the last 6500 years as recorded by sediments from the lakes of south Argentina
title_full_unstemmed Geomagnetic secular variations over the last 6500 years as recorded by sediments from the lakes of south Argentina
title_sort Geomagnetic secular variations over the last 6500 years as recorded by sediments from the lakes of south Argentina
dc.creator.none.fl_str_mv Gogorza, Claudia Susana
Sinito, Ana Maria
Vilas, J. F.
Creer, K. M.
Nuñez, H.
author Gogorza, Claudia Susana
author_facet Gogorza, Claudia Susana
Sinito, Ana Maria
Vilas, J. F.
Creer, K. M.
Nuñez, H.
author_role author
author2 Sinito, Ana Maria
Vilas, J. F.
Creer, K. M.
Nuñez, H.
author2_role author
author
author
author
dc.subject.none.fl_str_mv HOLOCENE
LAKE SEDIMENTS
PALAEOMAGNETISM
SECULAR VARIATIONS
SOUTH AMERICA
topic HOLOCENE
LAKE SEDIMENTS
PALAEOMAGNETISM
SECULAR VARIATIONS
SOUTH AMERICA
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Regional type curves depicting secular variations in declination and inclination through the last 6700 calendar years constructed for southwestern Argentina (about 41°S, 71°30′W) by stacking palaeomagnetic data derived from lake sediment cores are described and analysed. The data consist of records from four lakes which have been previously studied (El Trebol, Brazo Campanario, Moreno and Escondido), and are here integrated. Within-lake correlation was based on magnetic susceptibility (χ) and intensity of the natural remanent magnetization (NRM). Interlake correlation was derived from declination and inclination patterns and a set of radiocarbon age determinations. The secular variation (SV) of the geomagnetic field was studied using spectral analysis and precession analysis of the magnetic vector. The spectrum obtained from spectral analysis of declination (D) and inclination (I) at the same time shows major peaks at periodicities of about 3400, 1600 and 1200 yr for both parameters. In order to test the stability of the periodicities obtained, spectral analysis has been applied to every 3500-yr time span at intervals of 500 yr for both records. Patterns of circularity during the last 6700 yr appear to recur with a near constant interval of about 2000 yr. Both open and closed loops are associated with clockwise and counter-clockwise circularity.
Fil: Gogorza, Claudia Susana. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto de Física Arroyo Seco; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil; Argentina
Fil: Sinito, Ana Maria. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Tandil. Sede Tandil del Centro de Investigaciones En Fisica E Ingenieria del Centro de la Provincia de Buenos Aires; Argentina. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto de Física Arroyo Seco; Argentina
Fil: Vilas, J. F.. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Geología. Instituto de Geofísica "Daniel Valencio"; Argentina
Fil: Creer, K. M.. University of Edinburgh; Reino Unido
Fil: Nuñez, H.. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina
description Regional type curves depicting secular variations in declination and inclination through the last 6700 calendar years constructed for southwestern Argentina (about 41°S, 71°30′W) by stacking palaeomagnetic data derived from lake sediment cores are described and analysed. The data consist of records from four lakes which have been previously studied (El Trebol, Brazo Campanario, Moreno and Escondido), and are here integrated. Within-lake correlation was based on magnetic susceptibility (χ) and intensity of the natural remanent magnetization (NRM). Interlake correlation was derived from declination and inclination patterns and a set of radiocarbon age determinations. The secular variation (SV) of the geomagnetic field was studied using spectral analysis and precession analysis of the magnetic vector. The spectrum obtained from spectral analysis of declination (D) and inclination (I) at the same time shows major peaks at periodicities of about 3400, 1600 and 1200 yr for both parameters. In order to test the stability of the periodicities obtained, spectral analysis has been applied to every 3500-yr time span at intervals of 500 yr for both records. Patterns of circularity during the last 6700 yr appear to recur with a near constant interval of about 2000 yr. Both open and closed loops are associated with clockwise and counter-clockwise circularity.
publishDate 2000
dc.date.none.fl_str_mv 2000-12
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/11336/163748
Gogorza, Claudia Susana; Sinito, Ana Maria; Vilas, J. F.; Creer, K. M.; Nuñez, H.; Geomagnetic secular variations over the last 6500 years as recorded by sediments from the lakes of south Argentina; Wiley Blackwell Publishing, Inc; Geophysical Journal International; 143; 3; 12-2000; 787-798
0956-540X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/163748
identifier_str_mv Gogorza, Claudia Susana; Sinito, Ana Maria; Vilas, J. F.; Creer, K. M.; Nuñez, H.; Geomagnetic secular variations over the last 6500 years as recorded by sediments from the lakes of south Argentina; Wiley Blackwell Publishing, Inc; Geophysical Journal International; 143; 3; 12-2000; 787-798
0956-540X
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/gji/article/143/3/787/720676?login=false
info:eu-repo/semantics/altIdentifier/doi/10.1046/j.1365-246X.2000.00277.x
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
application/pdf
dc.publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
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 13.070432

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