Geochimica et Cosmochimica Acta, 2006, V 70, N 2, 15 January.

Cover 1 (TOC)  • 
Page CO1 

Editorial Board  • 
Page CO2 

Acid–base activity of live bacteria: 
Implications for quantifying cell wall charge  • 
Jacqueline Claessens, Yvonne van Lith, 
Anniet M. Laverman and Philippe Van Cappellen
Pages 267-276 

Kinetic isotopic fractionation during 
diffusion of ionic species in water  • 
Frank M. Richter, Ruslan A. Mendybaev,
John N. Christensen, Ian D. Hutcheon, 
Ross W. Williams, Neil C. Sturchio and 
Abelardo D. Beloso, Jr.
Pages 277-289 

The effect of Al(OH)4- on the dissolution
rate of quartz  • 
Barry R. Bickmore, Kathryn L. Nagy, 
Amy K. Gray and A. Riley Brinkerhoff
Pages 290-305 

The effect of iron on montmorillonite stability. 
(I) Background and thermodynamic considerations  • 
James Wilson, David Savage, Javier Cuadros, 
Masahiro Shibata and K.Vala Ragnarsdottir
Pages 306-322 

The effect of iron on montmorillonite stability. 
(II) Experimental investigation  • 
James Wilson, Gordon Cressey, Barbara Cressey, 
Javier Cuadros, K. Vala Ragnarsdottir,
David Savage and Masahiro Shibata
Pages 323-336 

The mineral dissolution rate conundrum: 
Insights from reactive transport modeling 
of U isotopes and pore fluid chemistry
in marine sediments  • 
Kate Maher, Carl I. Steefel, 
Donald J. DePaolo and Brian E. Viani
Pages 337-363 

Dissolution kinetics as a function of the 
Gibbs free energy of reaction: 
An experimental study based on albite feldspar  • 
Roland Hellmann and Delphine Tisserand
Pages 364-383 

Non-uniqueness and interpretation of the 
seawater 87Sr/86Sr curve  • 
Dave Waltham and Darren R. Grocke
Pages 384-394 

Barium uptake into the shells of the common 
mussel (Mytilus edulis) and the potential 
for estuarine paleo-chemistry reconstruction  • 
David P. Gillikin, Frank Dehairs, Anne Lorrain, 
Dirk Steenmans, Willy Baeyens and Luc Andre
Pages 395-407 

Cretaceous black shales as active bioreactors: 
A biogeochemical model for the deep biosphere 
encountered during ODP Leg 207 (Demerara Rise)  • 
Sandra Arndt, Hans-Jurgen Brumsack and Kai W. Wirtz
Pages 408-425 

Reassessing the uranium decay constants for 
geochronology using ID-TIMS U–Pb data  • 
Blair Schoene, James L. Crowley, Daniel J. Condon, 
Mark D. Schmitz and Samuel A. Bowring
Pages 426-445 

Experimental investigation of single carbon 
compounds under hydrothermal conditions  • 
Jeffrey S. Seewald, Mikhail Yu. Zolotov 
and Thomas McCollom
Pages 446-460 

Trace element degassing and enrichment in the 
eruptive plume of the 2000 eruption of 
Hekla volcano, Iceland  • 
Severine Moune, Pierre-J. Gauthier, 
Sigurdur R. Gislason and Olgeir Sigmarsson
Pages 461-479 

Partial melting processes above subducting
plates: Constraints from 231Pa–235U disequilibria  • 
Simon Turner, Marcel Regelous, 
Chris Hawkesworth and Kia Rostami
Pages 480-503 

High-pressure phases in a shock-induced melt
vein of the Tenham L6 chondrite: Constraints 
on shock pressure and duration  • 
Zhidong Xie, Thomas G. Sharp and Paul S. DeCarli
Pages 504-515 

Graves Nunataks 95209: A snapshot of metal 
segregation and core formation  • 
T.J. McCoy, W.D. Carlson, L.R. Nittler, 
R.M. Stroud, D.D. Bogard and D.H. Garrison
Pages 516-531 

Announcement: 69th Annual Meeting of the 
Meteoritical Society  • 
Page VII 

Cover 4 (TOC continued/Barcode)  • 
Page CO4