(Article of periodic en Anglais - 2013)

Document title

Carbon isotopes in the rivers from the Lesser Antilles : origin of the carbonic acid consumed by weathering reactions in the Lesser Antilles

Authors(s) and Affiliation(s)

RIVÉ K. (1 2) ; GAILLARDET J. (1) ; AGRINIER P. (1) ; RAD S. (1 3) ;
(1) Inst. de Physique du Globe de Paris, UMR -CNRS 7154, Paris, FRANCE
(2) GEGEO, Villeneuve d'Ascq, FRANCE


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


Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2013, vol. 38, no9 [pp. 1020-1035]

Bibliographic references : 2 p.

Collation : 6 fig., 2 tabl.



INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3385

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