Geochimica et Cosmochimica Acta, 2004, V 68, N 6, 15 March.

1.   
 Cycling of dissolved elemental mercury in Arctic Alaskan lakes, 
 C. M. Tseng , C. Lamborg , W. F. Fitzgerald and D. R. Engstrom
 Pages 1173-1184  

2.   
 Formation and stability of schwertmannite in acidic mining lakes 1, 
 Simona Regenspurg , Andreas Brand and Stefan Peiffer
 Pages 1185-1197

3.   
 Mineral dissolution in the Cape Cod aquifer, Massachusetts, USA:
 I . Reaction stoichiometry and impact of accessory feldspar and 
 glauconite on strontium isotopes, solute concentrations, 
 and REY distribution1, 
 Michael Bau , Brian Alexander , John T. Chesley , 
 Peter Dulski and Susan L. Brantley
 Pages 1199-1216  

4.   
 Formation of Fe(III)-minerals by Fe(II)-oxidizing photoautotrophic 
 bacteria 1,  
 Andreas Kappler and Dianne K. Newman
 Pages 1217-1226

5.   
 Iron isotope fractionation by Fe(II)-oxidizing photoautotrophic 
 bacteria 1, 
 Laura R. Croal , Clark M. Johnson , Brian L. Beard 
 and Dianne K. Newman
 Pages 1227-1242 

6.   
 Sources of osmium to the modern oceans: new evidence from
 the 190Pt-186Os system1, 
 Diane K. McDaniel , Richard J. Walker , Sidney R. Hemming , 
 Mary F. Horan , Harry Becker and Richard I. Grauch
 Pages 1243-1252 

7.   
 The use of oxygen isotope variation in shells of estuarine
 mollusks as a quantitative record of seasonal and annual 
 Colorado river discharge1,  
 David L. Dettman , Karl W. Flessa , Peter D. Roopnarine , 
 Bernd R. Schone and David H. Goodwin
 Pages 1253-1263

8.   
 Rare earth elements in pore waters of marine sediments, 
 Brian A. Haley , Gary P. Klinkhammer and James McManus
 Pages 1265-1279 

9.   
 Reactivity of organic matter in aquifer sediments: 
 geological and geochemical controls 1, 
 N. Hartog , P. F. van Bergen , J. W. de Leeuw and J. Griffioen
 Pages 1281-1292 

10.   
 Tannin signatures of barks, needles, leaves, cones, and 
 wood at the molecular level1, 
 Peter J. Hernes and John I. Hedges
 Pages 1293-1307

11.   
 Chemical equilibrium model of solution behavior and 
 solubility in the H-Na-K-OH-Cl-HSO4-SO4-H2O system to 
 high concentration and temperature1, 
 Christomir Christov and Nancy Moller
 Pages 1309-1331 

12.   
 Experimental study of the stability of aluminate-borate 
 complexes in hydrothermal solutions 1,
 Boris Tagirov , Jacques Schott , Jean-Claude Harrichoury 
 and Jocelyne Escalier
 Pages 1333-1345 

13.   
 Serpentinization and heat generation: constraints from 
 Lost City and Rainbow hydrothermal systems1,
 Douglas E. Allen and W. E. Seyfried, Jr
  Pages 1347-1354 

14.   
 Raman spectroscopic study of CO2-NaCl-H2O mixtures 
 in synthetic fluid inclusions at high temperatures1, 
 Jinyang Chen , Haifei Zheng , Wansheng Xiao , 
 Yishan Zeng and Kenan Weng
 Pages 1355-1360 

15.   
 Platinum group element geochemistry of komatiites from 
 the Alexo and Pyke Hill areas, Ontario, Canada 1,
 Igor S. Puchtel , Munir Humayun , Andrew J. Campbell , 
 Rebecca A. Sproule and C. Michael Lesher
 Pages 1361-1383 

16.   
 Hydropyrolysis of insoluble carbonaceous matter in the 
 Murchison meteorite: new insights into its macromolecular
 structure1, 
 M. A. Sephton , G. D. Love , J. S. Watson , A. B. Verchovsky , 
 I. P. Wright , C. E. Snape and I. Gilmour
 Pages 1385-1393

17.   
 Hydrogen isotope evidence for the origin and evolution 
 of the carbonaceous chondrites 1, 
 John M. Eiler and Nami Kitchen
 Pages 1395-1411 

18.   
 Pt-Re-Os systematics of group IIAB and IIIAB iron meteorites 1, 
 D. L. Cook , R. J. Walker , M. F. Horan , J. T. Wasson and J. W. Morgan
 Pages 1413-1431  

19.   
 Comment on "Improving noble gas based paleoclimate
 reconstruction and groundwater dating using 20Ne/22Ne ratios," 
 by F. Peeters et al. (2003) Geochim. Cosmochim. Acta, 
 67, 587–6001,
 Guillaume Favreau , Abdou Guero and Jean-Luc Seidel
  Pages 1433-1435 

20.   
 Response to the comment by G. Favreau, A. Guero, and J. Seidel 
 on "Improving noble gas based paleoclimate reconstruction 
 and groundwater dating using 20Ne/22Ne ratios" (2003)
 Geochim. Cosmochim. Acta, 67, 587–600 1,  
 Frank Peeters , Urs Beyerle , Werner Aeschbach-Hertig , 
 Matthias S. Brennwald and Rolf Kipfer
 Pages 1437-1438