Detailed palaeomagnetic record at Rose Cottage Cave, South Africa: Implications for the Holocene geomagnetic field behaviour and chronostratigraphy

Autores
Nami, Hugo Gabriel; Vasquez, Carlos Alberto; Wadley, Lyn; de la Peña, Paloma
Año de publicación
2020
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Palaeomagnetic data from a sedimentary section spanning the Holocene and terminal Pleistocene (~13 kya) from Rose Cottage Cave, eastern Free State (South Africa), are reported. The palaeomagnetic analysis took into account rock magnetism and directional analysis. The former reveals that most samples show stable single domain and superparamagnetic particles of Ti-poor magnetite and haematite. Natural remanent magnetisation directions were determined by progressive alternating field demagnetisation methodology. Directional analysis shows normal directions between samples 18 to 39 and 85 to 92; however, during the Early and Late Holocene in samples principally from RC40 to 84 'anomalous' directions occurred. There is a significant westward shift in declination of ~80°, and a conspicuous fluctuating inclination in the lower part of the section during the Early Holocene at ≥9.5 kya and before ~12.0/13.0 kya. This palaeomagnetic record might become a chronostratigraphical marker for latest Pleistocene/Holocene sedimentary deposits in South Africa. Our two new accelerator mass spectrometry radiocarbon dates for the sampled deposit are 9500±50 BP and 1115±30 BP. SIGNIFICANCE: •The study provides new accelerator mass spectrometry dates on the chronological sequence existing in Rose Cottage Cave. •The findings contribute to the knowledge of the geomagnetic field behaviour since the terminal Pleistocene to the Late Holocene in a period spanning the last 13 000/12 000 years. •This palaeomagnetic record might become a chronostratigraphical marker for the latest Pleistocene/Holocene sedimentary deposits in South Africa.
Fil: Nami, Hugo Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Geológicas; Argentina
Fil: Vasquez, Carlos Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Geológicas; Argentina. Universidad de Buenos Aires. Ciclo Básico Común; Argentina
Fil: Wadley, Lyn. University of the Witwatersrand; Sudáfrica
Fil: de la Peña, Paloma. University of the Witwatersrand; Sudáfrica
Materia
PALAEOMAGNETISM
PALAEOSECULAR VARIATIONS
REMANENT MAGNETISATION
ROCK MAGNETISM
VIRTUAL GEOMAGNETIC POLE POSITIONS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/182547
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/182547
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Detailed palaeomagnetic record at Rose Cottage Cave, South Africa: Implications for the Holocene geomagnetic field behaviour and chronostratigraphyNami, Hugo GabrielVasquez, Carlos AlbertoWadley, Lynde la Peña, PalomaPALAEOMAGNETISMPALAEOSECULAR VARIATIONSREMANENT MAGNETISATIONROCK MAGNETISMVIRTUAL GEOMAGNETIC POLE POSITIONShttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Palaeomagnetic data from a sedimentary section spanning the Holocene and terminal Pleistocene (~13 kya) from Rose Cottage Cave, eastern Free State (South Africa), are reported. The palaeomagnetic analysis took into account rock magnetism and directional analysis. The former reveals that most samples show stable single domain and superparamagnetic particles of Ti-poor magnetite and haematite. Natural remanent magnetisation directions were determined by progressive alternating field demagnetisation methodology. Directional analysis shows normal directions between samples 18 to 39 and 85 to 92; however, during the Early and Late Holocene in samples principally from RC40 to 84 'anomalous' directions occurred. There is a significant westward shift in declination of ~80°, and a conspicuous fluctuating inclination in the lower part of the section during the Early Holocene at ≥9.5 kya and before ~12.0/13.0 kya. This palaeomagnetic record might become a chronostratigraphical marker for latest Pleistocene/Holocene sedimentary deposits in South Africa. Our two new accelerator mass spectrometry radiocarbon dates for the sampled deposit are 9500±50 BP and 1115±30 BP. SIGNIFICANCE: •The study provides new accelerator mass spectrometry dates on the chronological sequence existing in Rose Cottage Cave. •The findings contribute to the knowledge of the geomagnetic field behaviour since the terminal Pleistocene to the Late Holocene in a period spanning the last 13 000/12 000 years. •This palaeomagnetic record might become a chronostratigraphical marker for the latest Pleistocene/Holocene sedimentary deposits in South Africa.Fil: Nami, Hugo Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Geológicas; ArgentinaFil: Vasquez, Carlos Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Geológicas; Argentina. Universidad de Buenos Aires. Ciclo Básico Común; ArgentinaFil: Wadley, Lyn. University of the Witwatersrand; SudáfricaFil: de la Peña, Paloma. University of the Witwatersrand; SudáfricaAcademy of Science of South Africa2020-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/182547Nami, Hugo Gabriel; Vasquez, Carlos Alberto; Wadley, Lyn; de la Peña, Paloma; Detailed palaeomagnetic record at Rose Cottage Cave, South Africa: Implications for the Holocene geomagnetic field behaviour and chronostratigraphy; Academy of Science of South Africa; South African Journal of Science; 116; 1-2; 4-2020; 1-90038-23531996-7489CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.17159/sajs.2020/6550info:eu-repo/semantics/altIdentifier/url/https://sajs.co.za/article/view/6550info:eu-repo/semantics/altIdentifier/url/http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S0038-23532020000100018info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:49:46Zoai:ri.conicet.gov.ar:11336/182547instacron: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 09:49:47.034CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Detailed palaeomagnetic record at Rose Cottage Cave, South Africa: Implications for the Holocene geomagnetic field behaviour and chronostratigraphy
title Detailed palaeomagnetic record at Rose Cottage Cave, South Africa: Implications for the Holocene geomagnetic field behaviour and chronostratigraphy
spellingShingle Detailed palaeomagnetic record at Rose Cottage Cave, South Africa: Implications for the Holocene geomagnetic field behaviour and chronostratigraphy
Nami, Hugo Gabriel
PALAEOMAGNETISM
PALAEOSECULAR VARIATIONS
REMANENT MAGNETISATION
ROCK MAGNETISM
VIRTUAL GEOMAGNETIC POLE POSITIONS
title_short Detailed palaeomagnetic record at Rose Cottage Cave, South Africa: Implications for the Holocene geomagnetic field behaviour and chronostratigraphy
title_full Detailed palaeomagnetic record at Rose Cottage Cave, South Africa: Implications for the Holocene geomagnetic field behaviour and chronostratigraphy
title_fullStr Detailed palaeomagnetic record at Rose Cottage Cave, South Africa: Implications for the Holocene geomagnetic field behaviour and chronostratigraphy
title_full_unstemmed Detailed palaeomagnetic record at Rose Cottage Cave, South Africa: Implications for the Holocene geomagnetic field behaviour and chronostratigraphy
title_sort Detailed palaeomagnetic record at Rose Cottage Cave, South Africa: Implications for the Holocene geomagnetic field behaviour and chronostratigraphy
dc.creator.none.fl_str_mv Nami, Hugo Gabriel
Vasquez, Carlos Alberto
Wadley, Lyn
de la Peña, Paloma
author Nami, Hugo Gabriel
author_facet Nami, Hugo Gabriel
Vasquez, Carlos Alberto
Wadley, Lyn
de la Peña, Paloma
author_role author
author2 Vasquez, Carlos Alberto
Wadley, Lyn
de la Peña, Paloma
author2_role author
author
author
dc.subject.none.fl_str_mv PALAEOMAGNETISM
PALAEOSECULAR VARIATIONS
REMANENT MAGNETISATION
ROCK MAGNETISM
VIRTUAL GEOMAGNETIC POLE POSITIONS
topic PALAEOMAGNETISM
PALAEOSECULAR VARIATIONS
REMANENT MAGNETISATION
ROCK MAGNETISM
VIRTUAL GEOMAGNETIC POLE POSITIONS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Palaeomagnetic data from a sedimentary section spanning the Holocene and terminal Pleistocene (~13 kya) from Rose Cottage Cave, eastern Free State (South Africa), are reported. The palaeomagnetic analysis took into account rock magnetism and directional analysis. The former reveals that most samples show stable single domain and superparamagnetic particles of Ti-poor magnetite and haematite. Natural remanent magnetisation directions were determined by progressive alternating field demagnetisation methodology. Directional analysis shows normal directions between samples 18 to 39 and 85 to 92; however, during the Early and Late Holocene in samples principally from RC40 to 84 'anomalous' directions occurred. There is a significant westward shift in declination of ~80°, and a conspicuous fluctuating inclination in the lower part of the section during the Early Holocene at ≥9.5 kya and before ~12.0/13.0 kya. This palaeomagnetic record might become a chronostratigraphical marker for latest Pleistocene/Holocene sedimentary deposits in South Africa. Our two new accelerator mass spectrometry radiocarbon dates for the sampled deposit are 9500±50 BP and 1115±30 BP. SIGNIFICANCE: •The study provides new accelerator mass spectrometry dates on the chronological sequence existing in Rose Cottage Cave. •The findings contribute to the knowledge of the geomagnetic field behaviour since the terminal Pleistocene to the Late Holocene in a period spanning the last 13 000/12 000 years. •This palaeomagnetic record might become a chronostratigraphical marker for the latest Pleistocene/Holocene sedimentary deposits in South Africa.
Fil: Nami, Hugo Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Geológicas; Argentina
Fil: Vasquez, Carlos Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Geológicas; Argentina. Universidad de Buenos Aires. Ciclo Básico Común; Argentina
Fil: Wadley, Lyn. University of the Witwatersrand; Sudáfrica
Fil: de la Peña, Paloma. University of the Witwatersrand; Sudáfrica
description Palaeomagnetic data from a sedimentary section spanning the Holocene and terminal Pleistocene (~13 kya) from Rose Cottage Cave, eastern Free State (South Africa), are reported. The palaeomagnetic analysis took into account rock magnetism and directional analysis. The former reveals that most samples show stable single domain and superparamagnetic particles of Ti-poor magnetite and haematite. Natural remanent magnetisation directions were determined by progressive alternating field demagnetisation methodology. Directional analysis shows normal directions between samples 18 to 39 and 85 to 92; however, during the Early and Late Holocene in samples principally from RC40 to 84 'anomalous' directions occurred. There is a significant westward shift in declination of ~80°, and a conspicuous fluctuating inclination in the lower part of the section during the Early Holocene at ≥9.5 kya and before ~12.0/13.0 kya. This palaeomagnetic record might become a chronostratigraphical marker for latest Pleistocene/Holocene sedimentary deposits in South Africa. Our two new accelerator mass spectrometry radiocarbon dates for the sampled deposit are 9500±50 BP and 1115±30 BP. SIGNIFICANCE: •The study provides new accelerator mass spectrometry dates on the chronological sequence existing in Rose Cottage Cave. •The findings contribute to the knowledge of the geomagnetic field behaviour since the terminal Pleistocene to the Late Holocene in a period spanning the last 13 000/12 000 years. •This palaeomagnetic record might become a chronostratigraphical marker for the latest Pleistocene/Holocene sedimentary deposits in South Africa.
publishDate 2020
dc.date.none.fl_str_mv 2020-04
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/11336/182547
Nami, Hugo Gabriel; Vasquez, Carlos Alberto; Wadley, Lyn; de la Peña, Paloma; Detailed palaeomagnetic record at Rose Cottage Cave, South Africa: Implications for the Holocene geomagnetic field behaviour and chronostratigraphy; Academy of Science of South Africa; South African Journal of Science; 116; 1-2; 4-2020; 1-9
0038-2353
1996-7489
CONICET Digital
CONICET
url http://hdl.handle.net/11336/182547
identifier_str_mv Nami, Hugo Gabriel; Vasquez, Carlos Alberto; Wadley, Lyn; de la Peña, Paloma; Detailed palaeomagnetic record at Rose Cottage Cave, South Africa: Implications for the Holocene geomagnetic field behaviour and chronostratigraphy; Academy of Science of South Africa; South African Journal of Science; 116; 1-2; 4-2020; 1-9
0038-2353
1996-7489
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.17159/sajs.2020/6550
info:eu-repo/semantics/altIdentifier/url/https://sajs.co.za/article/view/6550
info:eu-repo/semantics/altIdentifier/url/http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S0038-23532020000100018
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Academy of Science of South Africa
publisher.none.fl_str_mv Academy of Science of South Africa
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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