Radiogenic isotope geochemistry applied to the characterization of the provenance of sediments transported by icebergs during the last glacial period: A study in the Galicia Interior Basin
In the scope of a collaboration with the University of Vigo, the Geobiotec research unit has contributed with studies on the Sr and Nd isotopic fingerprints of the sediments deposited in the Galicia Interior Basin in the last six Heinrich Stadials (HS; climatic oscillations that culminated by massiv...
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Universidade de Aveiro
2017
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ftria:oai:ria.ua.pt:10773/21130 2023-05-15T17:33:45+02:00 Radiogenic isotope geochemistry applied to the characterization of the provenance of sediments transported by icebergs during the last glacial period: A study in the Galicia Interior Basin Plaza Morlote, M. Santos, J.F. Ribeiro, S. Rey, D. Martins, V. 2017 http://hdl.handle.net/10773/21130 eng eng Universidade de Aveiro https://www.ua.pt/research/entrada 2182-9357 http://hdl.handle.net/10773/21130 openAccess Sr and Nd isotopes Galicia Interior Basin Heinrich Stadials Last glacial period Sediment provenance article 2017 ftria 2022-05-25T18:35:58Z In the scope of a collaboration with the University of Vigo, the Geobiotec research unit has contributed with studies on the Sr and Nd isotopic fingerprints of the sediments deposited in the Galicia Interior Basin in the last six Heinrich Stadials (HS; climatic oscillations that culminated by massive discharge of icebergs to the North Atlantic during the last glacial period). Strongly negative ƐNd values during HS1 (~15-16 ka), HS2 (~23.5-25 ka), HS4 (~37.5-40 ka) and HS5(~43.8-45.5 ka) are consistent with a Canadian source for the sediments dropped by icebergs. In contrast, higher ƐNd and relatively low 87Sr/86Sr values were recorded during HS3, HS5a, HS6, but also in the initial stages of HS1 (~16-17.5 ka), HS2 (~25-26.3 ka) and HS4 (~40-42 ka), pointing to an European provenance of those sediments. The whole set of data suggests that large European meltwater discharges in the beginning of HS1, HS2 and HS4 could have contributed to the weakening of the Atlantic Meridional Overturning Circulation and, consequently, to the collapse of the ice sheets covering NW Europe and NE America. Article in Journal/Newspaper North Atlantic Repositório Institucional da Universidade de Aveiro (RIA) |
institution |
Open Polar |
collection |
Repositório Institucional da Universidade de Aveiro (RIA) |
op_collection_id |
ftria |
language |
English |
topic |
Sr and Nd isotopes Galicia Interior Basin Heinrich Stadials Last glacial period Sediment provenance |
spellingShingle |
Sr and Nd isotopes Galicia Interior Basin Heinrich Stadials Last glacial period Sediment provenance Plaza Morlote, M. Santos, J.F. Ribeiro, S. Rey, D. Martins, V. Radiogenic isotope geochemistry applied to the characterization of the provenance of sediments transported by icebergs during the last glacial period: A study in the Galicia Interior Basin |
topic_facet |
Sr and Nd isotopes Galicia Interior Basin Heinrich Stadials Last glacial period Sediment provenance |
description |
In the scope of a collaboration with the University of Vigo, the Geobiotec research unit has contributed with studies on the Sr and Nd isotopic fingerprints of the sediments deposited in the Galicia Interior Basin in the last six Heinrich Stadials (HS; climatic oscillations that culminated by massive discharge of icebergs to the North Atlantic during the last glacial period). Strongly negative ƐNd values during HS1 (~15-16 ka), HS2 (~23.5-25 ka), HS4 (~37.5-40 ka) and HS5(~43.8-45.5 ka) are consistent with a Canadian source for the sediments dropped by icebergs. In contrast, higher ƐNd and relatively low 87Sr/86Sr values were recorded during HS3, HS5a, HS6, but also in the initial stages of HS1 (~16-17.5 ka), HS2 (~25-26.3 ka) and HS4 (~40-42 ka), pointing to an European provenance of those sediments. The whole set of data suggests that large European meltwater discharges in the beginning of HS1, HS2 and HS4 could have contributed to the weakening of the Atlantic Meridional Overturning Circulation and, consequently, to the collapse of the ice sheets covering NW Europe and NE America. |
format |
Article in Journal/Newspaper |
author |
Plaza Morlote, M. Santos, J.F. Ribeiro, S. Rey, D. Martins, V. |
author_facet |
Plaza Morlote, M. Santos, J.F. Ribeiro, S. Rey, D. Martins, V. |
author_sort |
Plaza Morlote, M. |
title |
Radiogenic isotope geochemistry applied to the characterization of the provenance of sediments transported by icebergs during the last glacial period: A study in the Galicia Interior Basin |
title_short |
Radiogenic isotope geochemistry applied to the characterization of the provenance of sediments transported by icebergs during the last glacial period: A study in the Galicia Interior Basin |
title_full |
Radiogenic isotope geochemistry applied to the characterization of the provenance of sediments transported by icebergs during the last glacial period: A study in the Galicia Interior Basin |
title_fullStr |
Radiogenic isotope geochemistry applied to the characterization of the provenance of sediments transported by icebergs during the last glacial period: A study in the Galicia Interior Basin |
title_full_unstemmed |
Radiogenic isotope geochemistry applied to the characterization of the provenance of sediments transported by icebergs during the last glacial period: A study in the Galicia Interior Basin |
title_sort |
radiogenic isotope geochemistry applied to the characterization of the provenance of sediments transported by icebergs during the last glacial period: a study in the galicia interior basin |
publisher |
Universidade de Aveiro |
publishDate |
2017 |
url |
http://hdl.handle.net/10773/21130 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://www.ua.pt/research/entrada 2182-9357 http://hdl.handle.net/10773/21130 |
op_rights |
openAccess |
_version_ |
1766132361503703040 |