Long term mobilisation of chemical elements in tephra-rich peat (NE Iceland)
International audience This paper presents geochemical profiles of a tephra-bearing minerotrophic peat column from NE-Iceland obtained using various elemental analyses of the solid phase and the pore water. The influence of tephra grain size, thickness and composition of each tephra on the peat geoc...
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Online Access: | https://doi.org/10.1016/j.apgeochem.2008.10.006 https://hal-insu.archives-ouvertes.fr/insu-00338740/file/FDV%20peat%20iceland%20AG%202008%20OCR.pdf https://hal-insu.archives-ouvertes.fr/insu-00338740 |
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fttriple:oai:gotriple.eu:10670/1.y2un4n 2023-05-15T16:34:03+02:00 Long term mobilisation of chemical elements in tephra-rich peat (NE Iceland) De Vleeschouwer, François Van Vliet-Lanoë, Brigitte Fagel, Nathalie Unité de Recherche Argiles et Paléoclimats Université de Liège Domaines Océaniques (LDO) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Observatoire des Sciences de l'Univers-Institut d'écologie et environnement-Centre National de la Recherche Scientifique (CNRS) Processus et bilan des domaines sédimentaires (PBDS) Université de Lille, Sciences et Technologies-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) 2008-11-05 https://doi.org/10.1016/j.apgeochem.2008.10.006 https://hal-insu.archives-ouvertes.fr/insu-00338740/file/FDV%20peat%20iceland%20AG%202008%20OCR.pdf https://hal-insu.archives-ouvertes.fr/insu-00338740 en eng HAL CCSD Elsevier insu-00338740 doi:10.1016/j.apgeochem.2008.10.006 10670/1.y2un4n https://hal-insu.archives-ouvertes.fr/insu-00338740/file/FDV%20peat%20iceland%20AG%202008%20OCR.pdf https://hal-insu.archives-ouvertes.fr/insu-00338740 other Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0883-2927 Applied Geochemistry Applied Geochemistry, Elsevier, 2008, 23 (12), pp.3819-3839. ⟨10.1016/j.apgeochem.2008.10.006⟩ geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2008 fttriple https://doi.org/10.1016/j.apgeochem.2008.10.006 2023-01-22T18:47:21Z International audience This paper presents geochemical profiles of a tephra-bearing minerotrophic peat column from NE-Iceland obtained using various elemental analyses of the solid phase and the pore water. The influence of tephra grain size, thickness and composition of each tephra on the peat geochemistry was investigated. Interpretations are supported by a statistical approach, in particular by autocorrelation, and by microscopy observations. Minerotrophic peat geochemistry may be strongly dependent upon post-depositional mobilization and possible leaching of elements as demonstrated by Fe and trace metal concentration profiles. Chemical elements, and more specifically potentially harmful metals, can be slowly leached out of volcanic falls during their weathering and re-accumulate downwards. It is emphasised that a tephra deposit can act as an active geochemical barrier, blocking downward elemental movements and leading to the formation of enriched layers. In this study, the formation of poorly amorphous Fe phases above the Hekla 3 tephra is shown. These poorly crystalline Fe phases scavenged Ni. Article in Journal/Newspaper Hekla Iceland Unknown Applied Geochemistry 23 12 3819 3839 |
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English |
topic |
geo envir |
spellingShingle |
geo envir De Vleeschouwer, François Van Vliet-Lanoë, Brigitte Fagel, Nathalie Long term mobilisation of chemical elements in tephra-rich peat (NE Iceland) |
topic_facet |
geo envir |
description |
International audience This paper presents geochemical profiles of a tephra-bearing minerotrophic peat column from NE-Iceland obtained using various elemental analyses of the solid phase and the pore water. The influence of tephra grain size, thickness and composition of each tephra on the peat geochemistry was investigated. Interpretations are supported by a statistical approach, in particular by autocorrelation, and by microscopy observations. Minerotrophic peat geochemistry may be strongly dependent upon post-depositional mobilization and possible leaching of elements as demonstrated by Fe and trace metal concentration profiles. Chemical elements, and more specifically potentially harmful metals, can be slowly leached out of volcanic falls during their weathering and re-accumulate downwards. It is emphasised that a tephra deposit can act as an active geochemical barrier, blocking downward elemental movements and leading to the formation of enriched layers. In this study, the formation of poorly amorphous Fe phases above the Hekla 3 tephra is shown. These poorly crystalline Fe phases scavenged Ni. |
author2 |
Unité de Recherche Argiles et Paléoclimats Université de Liège Domaines Océaniques (LDO) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Observatoire des Sciences de l'Univers-Institut d'écologie et environnement-Centre National de la Recherche Scientifique (CNRS) Processus et bilan des domaines sédimentaires (PBDS) Université de Lille, Sciences et Technologies-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
De Vleeschouwer, François Van Vliet-Lanoë, Brigitte Fagel, Nathalie |
author_facet |
De Vleeschouwer, François Van Vliet-Lanoë, Brigitte Fagel, Nathalie |
author_sort |
De Vleeschouwer, François |
title |
Long term mobilisation of chemical elements in tephra-rich peat (NE Iceland) |
title_short |
Long term mobilisation of chemical elements in tephra-rich peat (NE Iceland) |
title_full |
Long term mobilisation of chemical elements in tephra-rich peat (NE Iceland) |
title_fullStr |
Long term mobilisation of chemical elements in tephra-rich peat (NE Iceland) |
title_full_unstemmed |
Long term mobilisation of chemical elements in tephra-rich peat (NE Iceland) |
title_sort |
long term mobilisation of chemical elements in tephra-rich peat (ne iceland) |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://doi.org/10.1016/j.apgeochem.2008.10.006 https://hal-insu.archives-ouvertes.fr/insu-00338740/file/FDV%20peat%20iceland%20AG%202008%20OCR.pdf https://hal-insu.archives-ouvertes.fr/insu-00338740 |
genre |
Hekla Iceland |
genre_facet |
Hekla Iceland |
op_source |
Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0883-2927 Applied Geochemistry Applied Geochemistry, Elsevier, 2008, 23 (12), pp.3819-3839. ⟨10.1016/j.apgeochem.2008.10.006⟩ |
op_relation |
insu-00338740 doi:10.1016/j.apgeochem.2008.10.006 10670/1.y2un4n https://hal-insu.archives-ouvertes.fr/insu-00338740/file/FDV%20peat%20iceland%20AG%202008%20OCR.pdf https://hal-insu.archives-ouvertes.fr/insu-00338740 |
op_rights |
other |
op_doi |
https://doi.org/10.1016/j.apgeochem.2008.10.006 |
container_title |
Applied Geochemistry |
container_volume |
23 |
container_issue |
12 |
container_start_page |
3819 |
op_container_end_page |
3839 |
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1766023795458441216 |