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Article dans une revue
Atmospheric dust contribution to the budget of U-series nuclides in soils from the Mount Cameroon volcano
Abstract : The atmospheric dust contribution to U-series nuclides in soils is evaluated by analyzing two soil and paleo-soil (<10 ka) profiles from the Mount Cameroon volcano where Sr-Nd-Pb fingerprints are clearly affected by Saharan dust accretion. The comparison of measured U-series disequilibria between bulk soils and associated parent lavas suggests that dust inputs can contribute up to 25% of the U and Th budget in soils whereas chemical weathering affects a maximum of 7% of the U budget. The uniform U-Th isotopic composition of the Saharan dust end-member inferred from the soils and the paleo-soils suggests a relative stability of the Saharan dust isotopic composition during the last 10 ka.
https://hal-brgm.archives-ouvertes.fr/hal-01026403
Contributeur : Anne-Marie Pouget Connectez-vous pour contacter le contributeur
Soumis le : lundi 21 juillet 2014 - 15:31:41
Dernière modification le : mercredi 19 janvier 2022 - 13:58:03
Contributeur : Anne-Marie Pouget Connectez-vous pour contacter le contributeur
Soumis le : lundi 21 juillet 2014 - 15:31:41
Dernière modification le : mercredi 19 janvier 2022 - 13:58:03