Geochemical signature of sources, recycling and weathering in the Last Glacial loess from the Rhône Valley (southeast France) and comparison with other European regions
International audience Pleistocene loess of the Rhône Valley and Provence region, disconnected from the two main European aeolian systems (North European Loess Belt and Danube basin), are of interest to test the impact of source variability, grain size sorting, weathering and sediment recycling on t...
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Online Access: | https://hal.archives-ouvertes.fr/hal-02440380 https://hal.archives-ouvertes.fr/hal-02440380v2/document https://hal.archives-ouvertes.fr/hal-02440380v2/file/Post-print-_Bosq_etal_AeolianResearch.pdf https://doi.org/10.1016/j.aeolia.2019.100561 |
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ftccsdartic:oai:HAL:hal-02440380v2 2023-05-15T16:41:20+02:00 Geochemical signature of sources, recycling and weathering in the Last Glacial loess from the Rhône Valley (southeast France) and comparison with other European regions Bosq, Mathieu Bertran, Pascal Degeai, Jean-philippe Queffelec, Alain Moine, Olivier De la Préhistoire à l'Actuel : Culture, Environnement et Anthropologie (PACEA) Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS) Institut national de recherches archéologiques préventives (Inrap) Archéologie des Sociétés Méditerranéennes (ASM) Université Paul-Valéry - Montpellier 3 (UPVM)-Centre National de la Recherche Scientifique (CNRS)-Ministère de la Culture (MC) Laboratoire de géographie physique : Environnements Quaternaires et Actuels (LGP) Université Paris 1 Panthéon-Sorbonne (UP1)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS) 2020-01 https://hal.archives-ouvertes.fr/hal-02440380 https://hal.archives-ouvertes.fr/hal-02440380v2/document https://hal.archives-ouvertes.fr/hal-02440380v2/file/Post-print-_Bosq_etal_AeolianResearch.pdf https://doi.org/10.1016/j.aeolia.2019.100561 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.aeolia.2019.100561 hal-02440380 https://hal.archives-ouvertes.fr/hal-02440380 https://hal.archives-ouvertes.fr/hal-02440380v2/document https://hal.archives-ouvertes.fr/hal-02440380v2/file/Post-print-_Bosq_etal_AeolianResearch.pdf doi:10.1016/j.aeolia.2019.100561 info:eu-repo/semantics/OpenAccess ISSN: 1875-9637 EISSN: 2212-1684 Aeolian Research https://hal.archives-ouvertes.fr/hal-02440380 Aeolian Research, Elsevier, 2020, 42, pp.100561. ⟨10.1016/j.aeolia.2019.100561⟩ https://www.sciencedirect.com/science/article/abs/pii/S187596371930134X Geochemistry ICP analysis Last Glacial Loess Southeast France Weathering [SDE.MCG]Environmental Sciences/Global Changes [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology info:eu-repo/semantics/article Journal articles 2020 ftccsdartic https://doi.org/10.1016/j.aeolia.2019.100561 2021-11-28T00:14:51Z International audience Pleistocene loess of the Rhône Valley and Provence region, disconnected from the two main European aeolian systems (North European Loess Belt and Danube basin), are of interest to test the impact of source variability, grain size sorting, weathering and sediment recycling on the geochemical composition. The concentration of major, trace and rare earth elements in loess and potential sources was analysed through Inductively Coupled Plasma-Atomic Emission Spectroscopy (ICP-AES) and ICP-Mass Spectometry (ICP-MS). Analyses show a genetic relationship between loess and the Ca-rich river sediments from the Alpine Ice Sheet (AIS). The loess of Provence show distinctive properties with a higher CaO and MgO content and a higher Europium anomaly (Eu/Eu*), suggesting sources richer in dolomite together with a contribution from mafic rocks (Alpine ophiolite complex). The homogeneous loess composition, compared to alluvial sources, reflects particle mixing during transport in the atmosphere. At the European scale, the geochemical composition of loess changes according to regions, but remains consistent within each region. Such variability is mostly related to the composition of rocks outcropping in respective catchments and especially in areas covered by ice sheets. The Chemical Proxy of Alteration (CPA) and Rb/K ratio suggest a weak chemical weathering linked to the cold and dry conditions typical of the Last Glacial. Recycling of older aeolian formations possibly caused loess enrichment in resistant minerals and quartz, especially for loess derived mostly from the abrasion of aeolian sand (Aquitaine). Article in Journal/Newspaper Ice Sheet Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Aeolian Research 42 100561 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
Geochemistry ICP analysis Last Glacial Loess Southeast France Weathering [SDE.MCG]Environmental Sciences/Global Changes [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology |
spellingShingle |
Geochemistry ICP analysis Last Glacial Loess Southeast France Weathering [SDE.MCG]Environmental Sciences/Global Changes [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology Bosq, Mathieu Bertran, Pascal Degeai, Jean-philippe Queffelec, Alain Moine, Olivier Geochemical signature of sources, recycling and weathering in the Last Glacial loess from the Rhône Valley (southeast France) and comparison with other European regions |
topic_facet |
Geochemistry ICP analysis Last Glacial Loess Southeast France Weathering [SDE.MCG]Environmental Sciences/Global Changes [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology |
description |
International audience Pleistocene loess of the Rhône Valley and Provence region, disconnected from the two main European aeolian systems (North European Loess Belt and Danube basin), are of interest to test the impact of source variability, grain size sorting, weathering and sediment recycling on the geochemical composition. The concentration of major, trace and rare earth elements in loess and potential sources was analysed through Inductively Coupled Plasma-Atomic Emission Spectroscopy (ICP-AES) and ICP-Mass Spectometry (ICP-MS). Analyses show a genetic relationship between loess and the Ca-rich river sediments from the Alpine Ice Sheet (AIS). The loess of Provence show distinctive properties with a higher CaO and MgO content and a higher Europium anomaly (Eu/Eu*), suggesting sources richer in dolomite together with a contribution from mafic rocks (Alpine ophiolite complex). The homogeneous loess composition, compared to alluvial sources, reflects particle mixing during transport in the atmosphere. At the European scale, the geochemical composition of loess changes according to regions, but remains consistent within each region. Such variability is mostly related to the composition of rocks outcropping in respective catchments and especially in areas covered by ice sheets. The Chemical Proxy of Alteration (CPA) and Rb/K ratio suggest a weak chemical weathering linked to the cold and dry conditions typical of the Last Glacial. Recycling of older aeolian formations possibly caused loess enrichment in resistant minerals and quartz, especially for loess derived mostly from the abrasion of aeolian sand (Aquitaine). |
author2 |
De la Préhistoire à l'Actuel : Culture, Environnement et Anthropologie (PACEA) Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS) Institut national de recherches archéologiques préventives (Inrap) Archéologie des Sociétés Méditerranéennes (ASM) Université Paul-Valéry - Montpellier 3 (UPVM)-Centre National de la Recherche Scientifique (CNRS)-Ministère de la Culture (MC) Laboratoire de géographie physique : Environnements Quaternaires et Actuels (LGP) Université Paris 1 Panthéon-Sorbonne (UP1)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Bosq, Mathieu Bertran, Pascal Degeai, Jean-philippe Queffelec, Alain Moine, Olivier |
author_facet |
Bosq, Mathieu Bertran, Pascal Degeai, Jean-philippe Queffelec, Alain Moine, Olivier |
author_sort |
Bosq, Mathieu |
title |
Geochemical signature of sources, recycling and weathering in the Last Glacial loess from the Rhône Valley (southeast France) and comparison with other European regions |
title_short |
Geochemical signature of sources, recycling and weathering in the Last Glacial loess from the Rhône Valley (southeast France) and comparison with other European regions |
title_full |
Geochemical signature of sources, recycling and weathering in the Last Glacial loess from the Rhône Valley (southeast France) and comparison with other European regions |
title_fullStr |
Geochemical signature of sources, recycling and weathering in the Last Glacial loess from the Rhône Valley (southeast France) and comparison with other European regions |
title_full_unstemmed |
Geochemical signature of sources, recycling and weathering in the Last Glacial loess from the Rhône Valley (southeast France) and comparison with other European regions |
title_sort |
geochemical signature of sources, recycling and weathering in the last glacial loess from the rhône valley (southeast france) and comparison with other european regions |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.archives-ouvertes.fr/hal-02440380 https://hal.archives-ouvertes.fr/hal-02440380v2/document https://hal.archives-ouvertes.fr/hal-02440380v2/file/Post-print-_Bosq_etal_AeolianResearch.pdf https://doi.org/10.1016/j.aeolia.2019.100561 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
ISSN: 1875-9637 EISSN: 2212-1684 Aeolian Research https://hal.archives-ouvertes.fr/hal-02440380 Aeolian Research, Elsevier, 2020, 42, pp.100561. ⟨10.1016/j.aeolia.2019.100561⟩ https://www.sciencedirect.com/science/article/abs/pii/S187596371930134X |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.aeolia.2019.100561 hal-02440380 https://hal.archives-ouvertes.fr/hal-02440380 https://hal.archives-ouvertes.fr/hal-02440380v2/document https://hal.archives-ouvertes.fr/hal-02440380v2/file/Post-print-_Bosq_etal_AeolianResearch.pdf doi:10.1016/j.aeolia.2019.100561 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.aeolia.2019.100561 |
container_title |
Aeolian Research |
container_volume |
42 |
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100561 |
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