Response of alluvial systems to Late Pleistocene climate changes recorded by environmental magnetism in the Añavieja Basin (Iberian range, NE Spain)
Environmental magnetic proxies were analyzed in a relatively monotonous, ~25.3m thick alluvial sedimentary sequence drilled in the Añavieja Basin (NE Spain). Results from the core AÑ2 suggest that the concentration dependent magnetic parameters mainly reflect variations in the content of detrital ma...
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Universidad de Barcelona
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ftcsic:oai:digital.csic.es:10261/135881 2024-02-11T10:05:58+01:00 Response of alluvial systems to Late Pleistocene climate changes recorded by environmental magnetism in the Añavieja Basin (Iberian range, NE Spain) Oliva-Urcia, Belén Muñoz, A. Larrasoaña, Juan C. Luzón, A. Pérez, A. González, A. Jiang, Z. Liu, Q. Román-Berdiel, T. Ministerio de Ciencia e Innovación (España) 2016-06 http://hdl.handle.net/10261/135881 https://doi.org/10.1344/GeologicaActa2016.14.2.4 https://doi.org/10.13039/501100004837 en eng Universidad de Barcelona Publisher's version http://dx.doi.org710.1344/GeologicaActa2016.14.2.4 Sí Geologica Acta, 14(2): 139-154 (2016) 1695-6133 http://hdl.handle.net/10261/135881 doi:10.1344/GeologicaActa2016.14.2.4 http://dx.doi.org/10.13039/501100004837 open Alluvial sequence Añavieja Basin Environmental magnetism Magnetite NGRIP curve Temperatures Vegetation cover artículo http://purl.org/coar/resource_type/c_6501 2016 ftcsic https://doi.org/10.1344/GeologicaActa2016.14.2.410.13039/501100004837 2024-01-16T10:17:02Z Environmental magnetic proxies were analyzed in a relatively monotonous, ~25.3m thick alluvial sedimentary sequence drilled in the Añavieja Basin (NE Spain). Results from the core AÑ2 suggest that the concentration dependent magnetic parameters mainly reflect variations in the content of detrital magnetite, sourced in the catchment rocks and soils of the basin, via changes in the dynamics of alluvial fans due to temperature changes in the northern hemisphere during the Late Pleistocene. The correspondence between the magnetic proxies and the temperature variations in the North Atlantic region (NGRIP curve) indicates that higher (lower) concentrations and finer (coarser) magnetite grains coincide with warm (cold) periods. We propose that during cold periods, a sparser vegetation cover favored the incoming of higher energy runoff bearing coarser sediments to the basin that are relatively impoverished in magnetite. In contrast, during warm periods, the wider distribution of the vegetation cover associated with the lower runoff energy lead to finer, magnetite-richer sediment input to the basin. Maghemite, presumably of pedogenic origin, appears to be present also in the studied alluvial sediments. Further studies are necessary to unravel its palaeoclimatic significance. © 2016, Universitat de Barcelona. All rights reserved. This study has been supported by research projects CGL2009-09165/BTE and CGL2009-08969, funded by the Ministerio de Ciencia e Innovación from Spain and FEDER UZ 2008-CIE-12. Peer reviewed Article in Journal/Newspaper NGRIP North Atlantic Digital.CSIC (Spanish National Research Council) |
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Open Polar |
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Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Alluvial sequence Añavieja Basin Environmental magnetism Magnetite NGRIP curve Temperatures Vegetation cover |
spellingShingle |
Alluvial sequence Añavieja Basin Environmental magnetism Magnetite NGRIP curve Temperatures Vegetation cover Oliva-Urcia, Belén Muñoz, A. Larrasoaña, Juan C. Luzón, A. Pérez, A. González, A. Jiang, Z. Liu, Q. Román-Berdiel, T. Response of alluvial systems to Late Pleistocene climate changes recorded by environmental magnetism in the Añavieja Basin (Iberian range, NE Spain) |
topic_facet |
Alluvial sequence Añavieja Basin Environmental magnetism Magnetite NGRIP curve Temperatures Vegetation cover |
description |
Environmental magnetic proxies were analyzed in a relatively monotonous, ~25.3m thick alluvial sedimentary sequence drilled in the Añavieja Basin (NE Spain). Results from the core AÑ2 suggest that the concentration dependent magnetic parameters mainly reflect variations in the content of detrital magnetite, sourced in the catchment rocks and soils of the basin, via changes in the dynamics of alluvial fans due to temperature changes in the northern hemisphere during the Late Pleistocene. The correspondence between the magnetic proxies and the temperature variations in the North Atlantic region (NGRIP curve) indicates that higher (lower) concentrations and finer (coarser) magnetite grains coincide with warm (cold) periods. We propose that during cold periods, a sparser vegetation cover favored the incoming of higher energy runoff bearing coarser sediments to the basin that are relatively impoverished in magnetite. In contrast, during warm periods, the wider distribution of the vegetation cover associated with the lower runoff energy lead to finer, magnetite-richer sediment input to the basin. Maghemite, presumably of pedogenic origin, appears to be present also in the studied alluvial sediments. Further studies are necessary to unravel its palaeoclimatic significance. © 2016, Universitat de Barcelona. All rights reserved. This study has been supported by research projects CGL2009-09165/BTE and CGL2009-08969, funded by the Ministerio de Ciencia e Innovación from Spain and FEDER UZ 2008-CIE-12. Peer reviewed |
author2 |
Ministerio de Ciencia e Innovación (España) |
format |
Article in Journal/Newspaper |
author |
Oliva-Urcia, Belén Muñoz, A. Larrasoaña, Juan C. Luzón, A. Pérez, A. González, A. Jiang, Z. Liu, Q. Román-Berdiel, T. |
author_facet |
Oliva-Urcia, Belén Muñoz, A. Larrasoaña, Juan C. Luzón, A. Pérez, A. González, A. Jiang, Z. Liu, Q. Román-Berdiel, T. |
author_sort |
Oliva-Urcia, Belén |
title |
Response of alluvial systems to Late Pleistocene climate changes recorded by environmental magnetism in the Añavieja Basin (Iberian range, NE Spain) |
title_short |
Response of alluvial systems to Late Pleistocene climate changes recorded by environmental magnetism in the Añavieja Basin (Iberian range, NE Spain) |
title_full |
Response of alluvial systems to Late Pleistocene climate changes recorded by environmental magnetism in the Añavieja Basin (Iberian range, NE Spain) |
title_fullStr |
Response of alluvial systems to Late Pleistocene climate changes recorded by environmental magnetism in the Añavieja Basin (Iberian range, NE Spain) |
title_full_unstemmed |
Response of alluvial systems to Late Pleistocene climate changes recorded by environmental magnetism in the Añavieja Basin (Iberian range, NE Spain) |
title_sort |
response of alluvial systems to late pleistocene climate changes recorded by environmental magnetism in the añavieja basin (iberian range, ne spain) |
publisher |
Universidad de Barcelona |
publishDate |
2016 |
url |
http://hdl.handle.net/10261/135881 https://doi.org/10.1344/GeologicaActa2016.14.2.4 https://doi.org/10.13039/501100004837 |
genre |
NGRIP North Atlantic |
genre_facet |
NGRIP North Atlantic |
op_relation |
Publisher's version http://dx.doi.org710.1344/GeologicaActa2016.14.2.4 Sí Geologica Acta, 14(2): 139-154 (2016) 1695-6133 http://hdl.handle.net/10261/135881 doi:10.1344/GeologicaActa2016.14.2.4 http://dx.doi.org/10.13039/501100004837 |
op_rights |
open |
op_doi |
https://doi.org/10.1344/GeologicaActa2016.14.2.410.13039/501100004837 |
_version_ |
1790603337266102272 |