Geochimica et Cosmochimica Acta, 2003, V 67, N 14, 15 July.

1.   
 Microscopic reversibility of Sm and Yb sorption onto smectite
 and kaolinite: Experimental evidence,  
 Frederic Coppin, Sylvie Castet, Gilles Berger and Michel Loubet
 Pages 2515-2527

2.   
 Modelling nitrogen and oxygen isotope fractionation during
 denitrification in a lacustrine redox-transition zone, 
 Moritz F. Lehmann, Peter Reichert, Stefano M. Bernasconi,
 Alberto Barbieri and Judith A. McKenzie
 Pages 2529-2542 

3.   
 Uranium (VI) sorption on colloidal magnetite under anoxic
 environment: experimental study and surface complexation
 modelling, 
 Tiziana Missana, Miguel Garcia-Gutierrez and Victor Ferndez
 Pages 2543-2550 
 
4.   
 ATR-FTIR spectroscopic studies of boric acid adsorption
 on hydrous ferric oxide,  
 Derek Peak, George W. Luther, III and Donald L. Sparks
 Pages 2551-2560
 
5.   
 Separating soil and leaf water 18O isotopic signals
 in plant stem cellulose, 
 Leonel da Silveira Lobo Sternberg, William T. Anderson
 and Kanema Morrison
 Pages 2561-2566 
 
6.   
 Fluxes of Sr into the headwaters of the Ganges,  
 Mike J. Bickle, Judith Bunbury, Hazel J. Chapman,
 Nigel B. W. Harris, Ian J. Fairchild and Talat Ahmad
 Pages 2567-2584
 
7.   
 Organic carbon and sulphur compounds in wetland soils:
 insights on structure and transformation processes
 using K-edge XANES and NMR spectroscopy,  
 Aleksander Jokic, Jeffrey N. Cutler, Elena Ponomarenko,
 Garth van der Kamp and Darwin W. Anderson
 Pages 2585-2597

8.   
 An experimental investigation of barite formation in seawater,  
 Raja S. Ganeshram, Roger Francois, Judy Commeau and Susan L. Brown-Leger
 Pages 2599-2605
 

9.   
 Variations of the 44Ca/40Ca ratio in seawater during the
 past 24 million years: evidence from 44Ca and 18O values
 of Miocene phosphates,  
 Anne-Desiree Schmitt, Peter Stille and Torsten Vennemann
 Pages 2607-2614

10.   
 The Upper Neoproterozoic–Lower Cambrian of the Central
 Iberian Zone, Spain: chemical and isotopic (Sm-Nd) evidence that
 the sedimentary succession records an inverted stratigraphy
 of its source, 
 J. M. Ugidos, M. I. Valladares, P. Barba and R. M. Ellam
 Pages 2615-2629 
 
11.   
 Control of sulfate pore-water profiles by sedimentary events
 and the significance of anaerobic oxidation of methane for
 the burial of sulfur in marine sediments, 
 Christian Hensen, Matthias Zabel, Kerstin Pfeifer,
 Tilmann Schwenk, Sabine Kasten, Natascha Riedinger,
 Horst D. Schulz and Antje Boetius
 Pages 2631-2647 
 
12.   
 Characterization of the manganese oxide produced by pseudomonas
 putida strain MnB1, 
 Mario Villalobos, Brandy Toner, John Bargar and Garrison Sposito
 Pages 2649-2662 

13.   
 Effects of fO2, fS2, temperature, and melt composition on Fe-Ni
 exchange between olivine and sulfide liquid: implications for
 natural olivine–sulfide assemblages, 
 James M. Brenan
 Pages 2663-2681 

14.   
 Calorimetric measurements of fusion enthalpies for Ni2SiO4 and
 Co2SiO4 olivines and application to olivine-liquid partitioning,  
 Toru Sugawara and Masaki Akaogi
 Pages 2683-2693

15.   
 Chromite-plagioclase assemblages as a new shock indicator;
 implications for the shock and thermal histories of ordinary
 chondrites, 
 Alan E. Rubin
 Pages 2695-2709