Mots-clés
Analyse isotopique Antilles Carbone Carbone 13 Cours d'eau Dioxyde de carbone Eau souterraine Erosion chimique Géochimie Météorisation Petites Antilles Roche volcanique Traceur Carbon Carbon 13 Carbon dioxide Chemical erosion Geochemistry Isotope analysis Lesser Antilles Stream Tracer Underground water Volcanic rock Weathering West Indies Agua subterránea Antillas Análisis isotópico Carbono Corriente de agua Dióxido de carbono Erosión química Geoquímica Meteorización Pequeñas Antillas Roca volcánica TrazadorCarbon isotopes in the rivers from the Lesser Antilles : origin of the carbonic acid consumed by weathering reactions in the Lesser Antilles
Auteur(s) et Affiliation(s)
RIVÉ, K.
Inst. de Physique du Globe de Paris, UMR -CNRS 7154, Paris, France
GEGEO, Villeneuve d'Ascq, France
GAILLARDET, J.
Inst. de Physique du Globe de Paris, UMR -CNRS 7154, Paris, France
AGRINIER, P.
Inst. de Physique du Globe de Paris, UMR -CNRS 7154, Paris, France
Description :
The AA. use carbon isotopes in the dissolved load of rivers from the Lesser Antilles volcanic arc (Guadeloupe, Martinique and Dominica islands) to constrain the source of the carbon dioxide (CO2) involved in the neutralization reactions during water–rock interactions. Chemical weathering is clearly, at least, partly controlled by the input of magmatic CO2, either under hydrothermal (hot) or surficial (cold) weathering regimes. This study shows that the contribution of magmatic CO2 to chemical weathering is an additional parameter that could explain the high weathering rates of volcanic rocks. The study also shows that a significant part of the carbon degassed from the Earth's interior is not released as CO2 to the atmosphere, but as DIC(dissolved inorganic carbon)to the ocean because it interacts with the groundwater system. This study calls for a better understanding of the contributions of deep carbon to the hydrosphere and its influence on the development of the Critical Zone.
Type de document :
Article de périodique
Source :
Earth surface processes and landforms, issn : 0197-9337, 2013, vol. 38, n°. 9, p. 1020-1035, nombre de pages : 16, Références bibliographiques : 2 p.
Date :
2013
Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley
Langue :
Anglais
Anglais
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)