Geochimica et Cosmochimica Acta, 2000, V 64, N 19, Oct.

pp 3251-3262
Isotopic source signatures for atmospheric lead: the 
Southern
Hemisphere
A. Bollhofer, K.J.R. Rosman

pp 3263-3273
Mineralogy of fine-grained rims in the alh 81002 cm 
chondrite
D.S. Lauretta, X. Hua, P.R. Buseck

pp 3275-3281
Dissolution of silicates and the stability of polysilicic acid
M. Dietzel

pp 3283-3297
Electron microprobe and LA-ICP-MS study of monazite hydrothermal
alteration: - Implications for U-Th-Pb geochronology and nuclear
ceramics
F. Poitrasson, S. Chenery, T.J. Shepherd

pp 3299-3312
Forsterite surface composition in aqueous solutions: a combined
potentiometric, electrokinetic, and spectroscopic approach
O.S. Pokrovsky, J. Schott

pp 3313-3325
Kinetics and mechanism of forsterite dissolution at 25^oC and pH from 1 to
12 O.S. Pokrovsky, J. Schott

pp 3327-3336
Mono- and bicyclic squalene derivatives as potential proxies for
anaerobic photosynthesis in lacustrine sulfur-rich sediments
A. Behrens, P. Schaeffer, S. Bernasconi, P. Albrecht

pp 3337-3345
Clay and acid catalysed isomerisation and cyclisation reactions of
highly branched isoprenoid (HBI) alkenes: implications for
sedimentary reactions and distributions
S.T. Belt, W.G. Allard, J. Rintatalo, L.A. Johns, A.C.T. van Duin,
S.J. Rowland

pp 3347-3355
Hydrous species geospeedometer in rhyolite: improved calibration and
application
Y. Zhang, Z. Xu, H. Behrens

pp 3357-3371
Evolution and paragenetic context of low @dD hydrothermal fluids from the
Panasqueira W-Sn deposit, Portugal: new evidence from microthermometric,
stable isotope, noble gas and halogen analyses of primary fluid inclusions
D.A. Polya, K.A. Foxford, F. Stuart, A. Boyce, A.E. Fallick

pp 3373-3393
Magmatic-hydrothermal evolution in a fractionating granite: a
microchemical study of the sn-w-f-mineralized mole granite
(Australia)
A. Audtat, D. Gnther, C.A. Heinrich

pp 3395-3412
Fluid mixing and recycling during Pyrenean thrusting: evidence from
fluid inclusion halogen ratios
A.M. McCaig, J. Tritlla, D.A. Banks

pp 3413-3432
Lu-hf garnet geochronology: closure temperature relative to the Sm-Nd
system and the effects of trace mineral inclusions E.E. Scherer, K.L.
Cameron, J. Blichert-Toft

pp 3433-3438
Carbon in olivines of chondritic meteorites
M.E. Varela, N. Metrich