Geochimica et Cosmochimica Acta, 2004, V 68, N 1, 1 January.

1.   
 Experimentally-controlled carbon and oxygen isotope exchange between
 bioapatites and water under inorganic and microbially-mediated conditions,  
 Antoine Zazzo, Christophe Lecuyer and Andre Mariotti
 Pages 1-12

2.   
 Chromium speciation and mobility in a high level nuclear waste vadose
 zone plume,  
 John M. Zachara, Calvin C. Ainsworth, Gordon E. Brown, Jr. , 
 Jeffrey G. Catalano, James P. McKinley, Odeta Qafoku,
 Steven C. Smith, James E. Szecsody, Sam J. Traina and Jeffrey A. Warner
  Pages 13-30

3.   
 Experimental study of brucite dissolution and precipitation in aqueous
 solutions: surface speciation and chemical affinity control, 
 Oleg S. Pokrovsky and Jacques Schott
 Pages 31-45

4.   
 Calcium carbonate dissolution in deep sea sediments: reconciling
 microelectrode, pore water and benthic flux chamber results,
 Richard A. Jahnke and Deborah B. Jahnke
 Pages 47-59 

5.   
 Stable carbon isotopic evidence for differences in the dietary origin of
 bone cholesterol, collagen and apatite: implications for their use
 in palaeodietary reconstruction, 
 Susan Jim, Stanley H. Ambrose and Richard P. Evershed
 Pages 61-72 

6.   
 The origin of clay minerals in active and relict hydrothermal deposits,  
 Silke Severmann, Rachel A. Mills, Martin R. Palmer and Anthony E. Fallick
 Pages 73-88

7.   
 Ba, Ra, Th, and U in marine mollusc shells and the potential of 226Ra/Ba
 dating of Holocene marine carbonate shells, 
 Michael Staubwasser, Gideon M. Henderson, Paul A. Berkman
 and Brenda L. Hall
 Pages 89-100

8.   
 Formation of monazite via prograde metamorphic reactions among
 common silicates: implications for age determinations, 
 Matthew J. Kohn and Margaret A. Malloy
 Pages 101-113 

9.   
 Isotopic evidence for trapped fissiogenic REE and nucleogenic
 Pu in apatite and Pb evolution at the Oklo natural reactor, 
 Kenji Horie, Hiroshi Hidaka and Francois Gauthier-Lafaye
 Pages 115-125

10.   
 Geochronology, petrology and geochemistry of the granulite xenoliths
 from Nushan, east China: implication for a heterogeneous lower
 crust beneath the Sino-Korean Craton, 
 Xiao-Long Huang, Yi-Gang Xu and Dun-Yi Liu
 Pages 127-149 

11.   
 40Ar/39Ar analyses of clinopyroxene inclusions in African diamonds
 : implications for source ages of detrital diamonds, 
 D. Phillips, J. W. Harris and G. B. Kiviets
  Pages 151-165

12.   
 226Ra-excess during the 1631-1944 activity period of Vesuvius (Italy):
 A model of alpha-recoil enrichment in a metasomatized mantle and
 implications on the current state of the magmatic system, 
 Mario Voltaggio, Marili Branca, Dario Tedesco, Paola Tuccimei
 and Laura Di Pietro
 Pages 167-181 

13.   
 Petrography and oxygen isotopic compositions in refractory inclusions
 from CO chondrites, 
 Shoichi Itoh, Hideyasu Kojima and Hisayoshi Yurimoto
 Pages 183-194 

14.   
 Iodine-xenon analysis of ordinary chondrite halide: implications
 for early solar system water, 
 A. Busfield, J. D. Gilmour, J. A. Whitby and G. Turner
 Pages 195-202