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 concentrationdependent magnetic parameters mainly reflect variations in the content of detrital mag...
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Universitat de Barcelona
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ftubarceojs:oai:revistes.ub.edu:article/13542 2023-05-15T17:23:40+02:00 Response of alluvial systems to Late Pleistocene climate changes recorded by environmental magnetism in the Añavieja Basin (Iberian Range, NE Spain) OLIVA URCIA, B. MUÑOZ, A. LARRASOAÑA, J.C. LUZÓN, A. PÉREZ, A. GONZALEZ, Á. JIANG, Z. LIU, Q. ROMÁN-BERDIEL, T. 2016-05-11 application/pdf http://revistes.ub.edu/index.php/GEOACTA/article/view/GeologicaActa2016.14.2.4 eng eng Universitat de Barcelona http://revistes.ub.edu/index.php/GEOACTA/article/view/GeologicaActa2016.14.2.4/19024 http://revistes.ub.edu/index.php/GEOACTA/article/view/GeologicaActa2016.14.2.4 Geologica Acta; Vol. 14 No 2 (2016); 139-154 Geologica Acta; Vol. 14 No. 2 (2016); 139-154 Geologica Acta; Vol. 14 Núm. 2 (2016); 139-154 1696-5728 1695-6133 Magnetite Environmental magnetism Añavieja Basin Alluvial sequence Vegetation cover Temperature NGRIP curve info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2016 ftubarceojs 2022-12-26T13:37:31Z 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 concentrationdependent 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. Article in Journal/Newspaper NGRIP North Atlantic Revistes Científiques de la Universitat de Barcelona |
institution |
Open Polar |
collection |
Revistes Científiques de la Universitat de Barcelona |
op_collection_id |
ftubarceojs |
language |
English |
topic |
Magnetite Environmental magnetism Añavieja Basin Alluvial sequence Vegetation cover Temperature NGRIP curve |
spellingShingle |
Magnetite Environmental magnetism Añavieja Basin Alluvial sequence Vegetation cover Temperature NGRIP curve OLIVA URCIA, B. MUÑOZ, A. LARRASOAÑA, J.C. LUZÓN, A. PÉREZ, A. GONZALEZ, Á. 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 |
Magnetite Environmental magnetism Añavieja Basin Alluvial sequence Vegetation cover Temperature NGRIP curve |
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 concentrationdependent 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. |
format |
Article in Journal/Newspaper |
author |
OLIVA URCIA, B. MUÑOZ, A. LARRASOAÑA, J.C. LUZÓN, A. PÉREZ, A. GONZALEZ, Á. JIANG, Z. LIU, Q. ROMÁN-BERDIEL, T. |
author_facet |
OLIVA URCIA, B. MUÑOZ, A. LARRASOAÑA, J.C. LUZÓN, A. PÉREZ, A. GONZALEZ, Á. JIANG, Z. LIU, Q. ROMÁN-BERDIEL, T. |
author_sort |
OLIVA URCIA, B. |
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 |
Universitat de Barcelona |
publishDate |
2016 |
url |
http://revistes.ub.edu/index.php/GEOACTA/article/view/GeologicaActa2016.14.2.4 |
genre |
NGRIP North Atlantic |
genre_facet |
NGRIP North Atlantic |
op_source |
Geologica Acta; Vol. 14 No 2 (2016); 139-154 Geologica Acta; Vol. 14 No. 2 (2016); 139-154 Geologica Acta; Vol. 14 Núm. 2 (2016); 139-154 1696-5728 1695-6133 |
op_relation |
http://revistes.ub.edu/index.php/GEOACTA/article/view/GeologicaActa2016.14.2.4/19024 http://revistes.ub.edu/index.php/GEOACTA/article/view/GeologicaActa2016.14.2.4 |
_version_ |
1766113919314690048 |