Geochimica et Cosmochimica Acta, 2004, V 68, N 13, 1 July.

1.   
 Constraining the equation of state of fluid H2O to 80 GPa
 using the melting curve, bulk modulus, 
 and thermal expansivity of Ice VII  ; 
 Mark R. Frank, Yingwei Fei and Jingzhu Hu
 Pages 2781-2790 

2.   
 Activation volumes for oxygen exchange between the 
 GaO4Al12(OH)24(H2O)127+(aq) (GaAl12) polyoxocation 
 and aqueous solution from variable pressure 
 17O NMR spectroscopy  ; 
 John Loring, Ping Yu, Brian L. Phillips and 
 William H. Casey
 Pages 2791-2798 
 
3.   
 Biotransformation of two-line silica-ferrihydrite by a dissimilatory 
 Fe(III)-reducing bacterium: formation of carbonate 
 green rust in the presence of phosphate  ; 
 Ravi K. Kukkadapu, John M. Zachara, James K. Fredrickson 
 and David W. Kennedy
 Pages 2799-2814 
 
4.   
 Reversibility of radiocaesium sorption on illite  ; 
 Arjan de Koning and Rob N. J. Comans
 Pages 2815-2823 
 
5.   
 Determination of SO41 for yttrium and the rare earth 
 elements at I = 0.66 m and t = 25°C;implications for 
 YREE solution speciation in sulfate-rich waters  ; 
 Johan Schijf and Robert H. Byrne
 Pages 2825-2837 
 
6.   
 A mechanism of mineral replacement: isotope
 tracing in the model system KCl-KBr-H2O  ; 
 Christine V. Putnis and Klaus Mezger
 Pages 2839-2848
 
7.   
 Molecular and isotopic stratigraphy in an
 ombrotrophic mire for paleoclimate reconstruction  ; 
 Shucheng Xie, Chris J. Nott, Luke A. Avsejs, 
 Darrel Maddy, Frank M. Chambers and
 Richard P. Evershed
 Pages 2849-2862
 
8.   
 Massive sulfide deposition and trace element 
 remobilization in the Middle Valley sediment-hosted
 hydrothermal system, northern Juan de Fuca Rdge  ; 
 J. L. Houghton, W. C. Shanks, III and W. E. Seyfried, Jr
 Pages 2863-2873 
 
9.   
 Manganese-chromium isotope systematics
 of enstatite meteorites  ; 
 A. Shukolyukov and G. W. Lugmair
 Pages 2875-2888 
 
10.   
 Chemical studies of L chondrites. VI: variations with
 petrographic type and shock-loading among
 equilibrated falls  ; 
 Jon M. Friedrich, John C. Bridges, Ming-Sheng Wang
 and Michael E. Lipschutz
 Pages 2889-2904 

11.   
 Oxygen isotopic SIMS analysis in Allende CAI: details
 of the very early thermal history of the solar system  ; 
 Motoo Ito, Hiroshi Nagasawa and Hisayoshi Yurimoto
 Pages 2905-2923 

12.   
 Li isotopic variations in single pyroxenes from the
 Northwest Africa 480 shergottite (NWA 480): 
 a record of degassing of Martian magmas?  ; 
 P. Beck, J. A. Barrat, M. Chaussidon, 
 Ph. Gillet and M. Bohn
 Pages 2925-2933 
 
13.   
 182Hf-182W isotope systematics of chondrites, eucrites, 
 and martian meteorites: Chronology of core formation 
 and early mantle differentiation in Vesta and Mars  ; 
 T. Kleine, K. Mezger, C. Munker, H. Palme and 
 A. Bischoff
 Pages 2935-2946 
 
14.   
 Initial 26Al/27Al in carbonaceous-chondrite chondrules: 
 too little 26Al to melt asteroids  ; 
 Takuya Kunihiro, Alan E. Rubin, Kevin D. McKeegan 
 and John T. Wasson
 Pages 2947-2957
 
15.   
 Erratum  ; 
 V. K. Rai
 Page 2959