Detailed palaeomagnetic record at Rose Cottage Cave, South Africa: Implications for the Holocene geomagnetic field behaviour and chronostratigraphy
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...
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ftconicet:oai:ri.conicet.gov.ar:11336/182547 2023-10-09T21:51:41+02:00 Detailed palaeomagnetic record at Rose Cottage Cave, South Africa: Implications for the Holocene geomagnetic field behaviour and chronostratigraphy Nami, Hugo Gabriel Vasquez, Carlos Alberto Wadley, Lyn de la Peña, Paloma application/pdf http://hdl.handle.net/11336/182547 eng eng Academy of Science of South Africa 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 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 info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/2.5/ar/ PALAEOMAGNETISM PALAEOSECULAR VARIATIONS REMANENT MAGNETISATION ROCK MAGNETISM VIRTUAL GEOMAGNETIC POLE POSITIONS https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.17159/sajs.2020/6550 2023-09-24T18:56:48Z 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. ... Article in Journal/Newspaper Geomagnetic Pole CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Argentina Kya ENVELOPE(8.308,8.308,63.772,63.772) South African Journal of Science 116 1/2 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
PALAEOMAGNETISM PALAEOSECULAR VARIATIONS REMANENT MAGNETISATION ROCK MAGNETISM VIRTUAL GEOMAGNETIC POLE POSITIONS https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
PALAEOMAGNETISM PALAEOSECULAR VARIATIONS REMANENT MAGNETISATION ROCK MAGNETISM VIRTUAL GEOMAGNETIC POLE POSITIONS https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 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 |
topic_facet |
PALAEOMAGNETISM PALAEOSECULAR VARIATIONS REMANENT MAGNETISATION ROCK MAGNETISM VIRTUAL GEOMAGNETIC POLE POSITIONS https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
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. 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. ... |
format |
Article in Journal/Newspaper |
author |
Nami, Hugo Gabriel Vasquez, Carlos Alberto Wadley, Lyn de la Peña, Paloma |
author_facet |
Nami, Hugo Gabriel Vasquez, Carlos Alberto Wadley, Lyn de la Peña, Paloma |
author_sort |
Nami, Hugo Gabriel |
title |
Detailed palaeomagnetic record at Rose Cottage Cave, South Africa: Implications for the Holocene geomagnetic field behaviour and chronostratigraphy |
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 |
publisher |
Academy of Science of South Africa |
url |
http://hdl.handle.net/11336/182547 |
long_lat |
ENVELOPE(8.308,8.308,63.772,63.772) |
geographic |
Argentina Kya |
geographic_facet |
Argentina Kya |
genre |
Geomagnetic Pole |
genre_facet |
Geomagnetic Pole |
op_relation |
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 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 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/2.5/ar/ |
op_doi |
https://doi.org/10.17159/sajs.2020/6550 |
container_title |
South African Journal of Science |
container_volume |
116 |
container_issue |
1/2 |
_version_ |
1779314819377135616 |