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 m...
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ftuabarcelonapb:oai:ddd.uab.cat:158652 2024-04-21T08:07:11+00:00 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, Arsenio Larrasoaña, J. C. Luzón Aguado, Mª Aránzazu Pérez GarcÃa, Antonio González RodrÃguez, Ãngel Jiang, Z. Liu, Q. Román Berdiel, MarÃa Teresa 2016 application/pdf https://ddd.uab.cat/record/158652 eng eng Geologica acta Vol. 14 Núm. 2 (June 2016), p. 139-154 https://ddd.uab.cat/record/158652 urn:10.1344/GeologicaActa2016.14.2.4 urn:oai:ddd.uab.cat:158652 urn:oai:raco.cat:article/310442 urn:articleid:16965728v14n2p139 urn:scopus_id:84978708818 urn:wos_id:000378331800004 urn:altmetric_id:10813995 urn:oai:revistes.ub.edu:article/13542 open access Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, sempre i quan aquestes es distribueixin sota la mateixa llicència que regula l'obra original i es reconegui l'autoria. https://creativecommons.org/licenses/by-sa/3.0/ Magnetite Environmental magnetism Añavieja basin Alluvial sequence Vegetation cover Temperature Ngrip curve Article 2016 ftuabarcelonapb 2024-03-26T09:35:07Z 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 Universitat Autònoma de Barcelona: Dipòsit Digital de Documents de la UAB |
institution |
Open Polar |
collection |
Universitat Autònoma de Barcelona: Dipòsit Digital de Documents de la UAB |
op_collection_id |
ftuabarcelonapb |
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, Arsenio Larrasoaña, J. C. Luzón Aguado, Mª Aránzazu Pérez GarcÃa, Antonio González RodrÃguez, Ãngel Jiang, Z. Liu, Q. Román Berdiel, MarÃa Teresa 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, Arsenio Larrasoaña, J. C. Luzón Aguado, Mª Aránzazu Pérez GarcÃa, Antonio González RodrÃguez, Ãngel Jiang, Z. Liu, Q. Román Berdiel, MarÃa Teresa |
author_facet |
Oliva Urcia, B. Muñoz, Arsenio Larrasoaña, J. C. Luzón Aguado, Mª Aránzazu Pérez GarcÃa, Antonio González RodrÃguez, Ãngel Jiang, Z. Liu, Q. Román Berdiel, MarÃa Teresa |
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 aã±avieja basin (iberian range, ne spain) |
publishDate |
2016 |
url |
https://ddd.uab.cat/record/158652 |
genre |
NGRIP North Atlantic |
genre_facet |
NGRIP North Atlantic |
op_relation |
Geologica acta Vol. 14 Núm. 2 (June 2016), p. 139-154 https://ddd.uab.cat/record/158652 urn:10.1344/GeologicaActa2016.14.2.4 urn:oai:ddd.uab.cat:158652 urn:oai:raco.cat:article/310442 urn:articleid:16965728v14n2p139 urn:scopus_id:84978708818 urn:wos_id:000378331800004 urn:altmetric_id:10813995 urn:oai:revistes.ub.edu:article/13542 |
op_rights |
open access Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, sempre i quan aquestes es distribueixin sota la mateixa llicència que regula l'obra original i es reconegui l'autoria. https://creativecommons.org/licenses/by-sa/3.0/ |
_version_ |
1796946850632171520 |