Geochemistry
PhD, HDR, DR IRD
Address: Géosciences Environnement Toulouse, 14 avenue Edouard Belin, 31400 Toulouse, FRANCE
Phone: +33 (0)5 61 33 46 24
Email: jean.riotte|DONTWANTSPAM|@get.omp.eu
Main fields of research and expertise
- Geochemical tracing of water-rock interactions (major and trace elements, Sr-U-Th isotopes), weathering mass balances
- Metallic pollution : Quantification of metallic exchangeable pool in soil and river particles (Cd, Zn, P, U, Th, Sr…), Isotopic tracing (66Zn)
- Development of U-Th-Ra-Pa isotopes measurement on MC-ICP-MS and TIMS
- U-Th dating in surface environment
Selected publications
Riotte J. , Chabaux F. (1999) : (234U/238U) activity ratios in freshwaters as tracers of hydrological processes : The Strengbach watershed (Vosges, France).Geochim. Cosmochim. Acta, 63, pp. 1263-1275.
Chabaux F. , Riotte J. , Clauer N. and France-Lanord Ch. (2001) : Isotopic tracing of dissolved U fluxes of the Himalayan rivers : Implications for present and past U budgets of the Ganges-Brahmaputra system.Geochim. Cosmochim. Acta,65, pp. 3201-3217.
Chabaux F. , Riotte J. and Dequincey O. (2003) : Fractionation during weathering and river transport. Reviews in Mineralogy and Geochemistry, 52 : Uranium-series Geochemistry, Eds B. Bourdon, G. M. Henderson, C.C. Lundstrom and S.P. Turner, pp. 533-576.
Benedetti M. , Dia A. , Riotte J. , Chabaux F. , Gérard M. , Boulègue J. , Fritz B. , Chauvel C. , Bulourde M. , Déruelle B. and Ildephonse Ph. (2003) : Chemical weathering of basaltic lava flows suffering extreme climatic conditions : the water geochemistry record.Chem. Geol. 201, pp. 1-17.
Riotte J. , Chabaux F. , Benedetti M. , Dia A. , Gérard M. , Boulègue J. and Etamé J. (2003) : U colloidal transport and origin of the 234U-238U fractionation in surface waters : New insights from Mount Cameroon.Chem. Geol.202, pp. 365-381.
Chabaux F. , Dequincey O. , Lesveque J.J. , Leprun J.C. , Clauer N. , Riotte J. and Paquet H. (2003) : Tracing and dating recent chemical mobility in weathering profiles by trace elements and 238U-234U-230Th disequilibrium : example of the Kaya lateritic profile (Burkina-Faso).Comptes Rendus Géosciences,335, pp 1219-1231.
France-Lanord Ch. , Evans M. , Hurtrez J.E. and Riotte J. (2003) : Annual dissolved fluxes from Central Nepal rivers : budget of chemical erosion in Himalaya. Comptes Rendus Géosciences, 335, pp 1131-1140.
Chabaux F. , Riotte J. , Schmitt A.D. , Carignan J. , Herckes P. , Pierret M.C. and Wortham H (2005) : Variations of U and Sr isotope ratios in Alsace and Luxembourg rain waters : origin and hydrogeochemical implications. C. R. Géosciences, 337, pp. 1447-1456.
Sivry Y. , Riotte J. and Dupré B. (2006) : Study of metal-colloidal humic acids interactions by coupling ultrafiltration and isotopic tracers. Application to natural waters. J. Geochem. Explor., pp. 144-147.
Chabaux F. , Bourdon B. and Riotte J. (2007) : U-Series Geochemistry in Weathering Profiles, River Waters and Lakes. In U/Th Series Radionuclides in Aquatic Systems (Eds S. Krishnaswami and J. K. Cochran), Elsevier, sous presse.
Sivry Y. , Riotte J. , Sonke J. , Audry S. , Schäfer J. , Viers J. , Blanc G. and Dupré B. (2007) : Zn isotopes as tracers of anthropogenic pollution from Zn-ore smelters. The Riou Mort-Lot River system. Accepté à Chem. Geol.