Article (Scientific journals)
Mid and late Holocene dust deposition in Western Europe: The Misten peat bog (Hautes Fagnes - Belgium)
Allan, Mohammed; Beghin, Jérémie; Le Roux, Gael et al.
2013In Climate of the Past, 9 (2889-2928,)
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Keywords :
Dust flux, Holocene,; Nd isotopes, Rare Earth Elements,; ombrotrophic peatland.
Abstract :
[en] Dust deposition in southern Belgium is estimated from the geochemical signature of an ombrotrophic peatland. The Rare Earth Elements (REE) and lithogenic elements concentrations, as well as Nd isotopes, were determined by HR-ICP-MS and MC-ICP-MS respectively, along a  6 m peat section covering 5300 years, from 2000 to 7300 cal.BP dated by the 14C method. Changes in REE concentration in the peat correlate with those of Ti, Al, Sc and Zr that are lithogenic conservative elements, suggesting that REE are immobile in the studied peat bogs and can be used as tracers of dust deposition. Peat humification and testate amoebae were used to evaluate hydroclimatic conditions. The range of dust deposition varied from 0.03 to 4.0 g m-2 yr-1. The highest dust fluxes were observed from 2750 to 2550 cal.BP and from 5150 to 4750 cal.BP and correspond to cold periods. The Nd values show a large variability from -13 to –5, identifying three major sources of dusts: local soils, distal volcanic and desert particles.
Research center :
AGES
Disciplines :
Earth sciences & physical geography
Author, co-author :
Allan, Mohammed ;  Université de Liège - ULiège > Doct. sc. (géologie - Bologne)
Beghin, Jérémie ;  Université de Liège - ULiège > Département de géologie > Paléobiogéologie - Paléobotanique - Paléopalynologie (PPP)
Le Roux, Gael
Piotrowska, Natalia
Javaux, Emmanuelle  ;  Université de Liège - ULiège > Département de géologie > Paléobiogéologie - Paléobotanique - Paléopalynologie (PPP)
Court-Picon, Mona ;  Université de Liège - ULiège > Département de géologie > Département de géologie
Mattielli, Nadine
Verheyden, Sophie
Fagel, Nathalie  ;  Université de Liège - ULiège > Département de géologie > Argiles, géochimie et environnements sédimentaires
Language :
English
Title :
Mid and late Holocene dust deposition in Western Europe: The Misten peat bog (Hautes Fagnes - Belgium)
Publication date :
2013
Journal title :
Climate of the Past
ISSN :
1814-9324
eISSN :
1814-9332
Publisher :
European Geosciences Union
Volume :
9
Issue :
2889-2928,
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 04 September 2013

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