Palaeomagnetic results and new dates of sedimentary deposits from Klasies River Cave 1, South Africa

Palaeomagnetic data from Klasies River main site Cave 1 (Eastern Cape Province, South Africa) are reported. Natural remanent magnetisation directions obtained from 77 oriented samples were determined by progressive alternating field demagnetisation methodology. Three palaeomagnetic samplings from th...

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Autores principales: Nami, H.G., De La Peña, P., Vásquez, C.A., Feathers, J., Wurz, S.
Formato: JOUR
Materias:
Holocene
Klasies River main site
Late Pleistocene
Palaeomagnetism
Palaeosecular variation
geomagnetic field
luminescence
magnetite
magnetization
Mesolithic
paleomagnetism
radiocarbon dating
secular variation
Cape Province
Eastern Cape
Klasies River
South Africa
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_19967489_v112_n11-12_p_Nami
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_19967489_v112_n11-12_p_Nami
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spelling todo:paper_19967489_v112_n11-12_p_Nami2023-10-03T16:37:34Z Palaeomagnetic results and new dates of sedimentary deposits from Klasies River Cave 1, South Africa Nami, H.G. De La Peña, P. Vásquez, C.A. Feathers, J. Wurz, S. Holocene Klasies River main site Late Pleistocene Palaeomagnetism Palaeosecular variation geomagnetic field Holocene luminescence magnetite magnetization Mesolithic paleomagnetism radiocarbon dating secular variation Cape Province Eastern Cape Klasies River South Africa Palaeomagnetic data from Klasies River main site Cave 1 (Eastern Cape Province, South Africa) are reported. Natural remanent magnetisation directions obtained from 77 oriented samples were determined by progressive alternating field demagnetisation methodology. Three palaeomagnetic samplings from the Witness Baulk from the Middle Stone Age (MSA) Late Pleistocene White Sand member and the Holocene Later Stone Age (LSA) middens in Cave 1 were dated and analysed to obtain the palaeomagnetic directions recorded in the sediments. Here we provide new optically stimulated luminescence (OSL) dates for the White Sand Member, and new accelerator mass spectrometry (AMS) radiocarbon dates for the LSA midden of areas not previously dated. The palaeomagnetic analysis took into account rock magnetism and directional analysis. The former reveals that the main magnetic carrier was magnetite; the latter shows that characteristic remanent magnetisation of normal and anomalous directions were observed in the lower portion of the White Sand Member and LSA midden. Normal directions correspond to the palaeosecular variation record for South Africa during the Late Pleistocene. On the other hand, the anomalous directions recorded in the LSA midden might represent the likely Sterno-Etrussia geomagnetic field excursion which occurred during the Late Holocene and is observed in other places on the planet. Finally, the directional data obtained are a potential tool for discussing the age of deposits corresponding to those periods. Significance: • New dates confirm and extend previous age determinations for the LSA and White Sand Member from Klasies River. © 2016. The Author(s). JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_19967489_v112_n11-12_p_Nami
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Holocene
Klasies River main site
Late Pleistocene
Palaeomagnetism
Palaeosecular variation
geomagnetic field
Holocene
luminescence
magnetite
magnetization
Mesolithic
paleomagnetism
radiocarbon dating
secular variation
Cape Province
Eastern Cape
Klasies River
South Africa
spellingShingle Holocene
Klasies River main site
Late Pleistocene
Palaeomagnetism
Palaeosecular variation
geomagnetic field
Holocene
luminescence
magnetite
magnetization
Mesolithic
paleomagnetism
radiocarbon dating
secular variation
Cape Province
Eastern Cape
Klasies River
South Africa
Nami, H.G.
De La Peña, P.
Vásquez, C.A.
Feathers, J.
Wurz, S.
Palaeomagnetic results and new dates of sedimentary deposits from Klasies River Cave 1, South Africa
topic_facet Holocene
Klasies River main site
Late Pleistocene
Palaeomagnetism
Palaeosecular variation
geomagnetic field
Holocene
luminescence
magnetite
magnetization
Mesolithic
paleomagnetism
radiocarbon dating
secular variation
Cape Province
Eastern Cape
Klasies River
South Africa
description Palaeomagnetic data from Klasies River main site Cave 1 (Eastern Cape Province, South Africa) are reported. Natural remanent magnetisation directions obtained from 77 oriented samples were determined by progressive alternating field demagnetisation methodology. Three palaeomagnetic samplings from the Witness Baulk from the Middle Stone Age (MSA) Late Pleistocene White Sand member and the Holocene Later Stone Age (LSA) middens in Cave 1 were dated and analysed to obtain the palaeomagnetic directions recorded in the sediments. Here we provide new optically stimulated luminescence (OSL) dates for the White Sand Member, and new accelerator mass spectrometry (AMS) radiocarbon dates for the LSA midden of areas not previously dated. The palaeomagnetic analysis took into account rock magnetism and directional analysis. The former reveals that the main magnetic carrier was magnetite; the latter shows that characteristic remanent magnetisation of normal and anomalous directions were observed in the lower portion of the White Sand Member and LSA midden. Normal directions correspond to the palaeosecular variation record for South Africa during the Late Pleistocene. On the other hand, the anomalous directions recorded in the LSA midden might represent the likely Sterno-Etrussia geomagnetic field excursion which occurred during the Late Holocene and is observed in other places on the planet. Finally, the directional data obtained are a potential tool for discussing the age of deposits corresponding to those periods. Significance: • New dates confirm and extend previous age determinations for the LSA and White Sand Member from Klasies River. © 2016. The Author(s).
format JOUR
author Nami, H.G.
De La Peña, P.
Vásquez, C.A.
Feathers, J.
Wurz, S.
author_facet Nami, H.G.
De La Peña, P.
Vásquez, C.A.
Feathers, J.
Wurz, S.
author_sort Nami, H.G.
title Palaeomagnetic results and new dates of sedimentary deposits from Klasies River Cave 1, South Africa
title_short Palaeomagnetic results and new dates of sedimentary deposits from Klasies River Cave 1, South Africa
title_full Palaeomagnetic results and new dates of sedimentary deposits from Klasies River Cave 1, South Africa
title_fullStr Palaeomagnetic results and new dates of sedimentary deposits from Klasies River Cave 1, South Africa
title_full_unstemmed Palaeomagnetic results and new dates of sedimentary deposits from Klasies River Cave 1, South Africa
title_sort palaeomagnetic results and new dates of sedimentary deposits from klasies river cave 1, south africa
url http://hdl.handle.net/20.500.12110/paper_19967489_v112_n11-12_p_Nami
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