CHEMICAL GEOLOGY SA ISOTOPE INGCLUEDIONGS CIENCE LSEVIER Chemical Geology 157 (1999) 355-356 Contents Volume 157, 1999 Vol. 157, Nos. 1-2 Research Papers Application of isotope dilution for precise measurement of Zr /Hf and '’°Hf/'”’ Hf ratios by mass spectrometry (ID-TIMS /ID-MC- ICP-MS) K. David, J.L. Birck, P. Telouk and C.J. Allegre An experimental study of dolomite dissolution rates as a function of pH from —0.5 to 5 and temperature from 25 to 80°C M. Gautelier, E.H. Oelkers and J. Schott Plume related alkaline magmatism in central Africa—the Meidob Hills (W Sudan) G. Franz, G. Steiner, F. Volker, D. Pudlo and K. Hammerschmidt Chemical and Rb-Sr, Sm—Nd isotopic systematics of tourmaline from the Dachang Sn-polymetallic ore deposit, Guangxi Province, P.R. China S.-Y. Jiang, F. Han, J.-Z. Shen and M.R. Palmer Geochemistry of high Mg andesites and the tectonic evolution of the Okinawa Trough—Ryukyu are system Crustal contamination in Palaeogene East Greenland flood basalts: plumbing system evolution during continental rifting H. Hansen and T.F.D. Nielsen Crust—mantle interaction induced by deep subduction of the continental crust: geochemical and Sr—Nd isotopic evidence from post-collisional mafic—ultramafic intrusions of the northern Dabie complex, central China B.-m. Jahn, F. Wu, C.-H. Lo and C.-H. Tsai A method for ~*'P a analysis by thermal ionization mass spectrometry in silicate rocks B. Bourdon, J.-L. Joron and C.J. Allegre Isotope Geoscience Section Hydrothermal and supergene clays of the Oklo natural reactors: conditions of radionuclide release, migration and retention L. Pourcelot and F. Gauthier-Lafaye Vol. 157, Nos. 3-4 Research Papers Evaluation of the coprecipitation of incompatible trace elements with fluoride during silicate rock dissolution by acid digestion T. Yokoyama, A. Makishima and E. Nakamura Quantitative determination of gold and the platinum-group elements in geological samples using improved NiS fire-assay and tellurium coprecipitation with inductively coupled plasma-mass spectrometry (ICP-MS) K. Oguri, G. Shimoda and Y. Tatsumi Low-temperature trace element mobility influenced by microbial activity— indications from fracture calcite and pyrite in crystalline basement E.-L. Tullborg, O. Landstrom and B. Wallin Quantifying the platinum group elements (PGEs) and gold in geological samples using cation exchange pretreatment and ultrasonic nebulization inductively coupled plasma-mass spectrometry (USN-ICP-MS) J.C. Ely, C.R. Neal, J.A. O'Neill Jr. and J.C. Jain Geochemical data as indicators of palaeosalinity in coastal organic-rich sediments A.M. Lopez-Buendia, J. Bastida, X. Querol and M.K.G. Whateley 356 Contents Volume 157, 1999 Optimal double and triple spiking for high precision lead isotopic measurement S.J.G. Galer Fractionation of aquatic natural organic matter upon sorption to goethite and kaolinite M. Meier, K. Namjesnik-Dejanovic, P.A. Maurice, Y.-P. Chin and G.R. Aiken An electron microprobe study of the U-Th—Pb systematics of metamorphosed monazite: the role of Pb diffusion versus overgrowth and recrystallization J.L. Crowley and E.D. Ghent Isotope hydrology and residence times of the unimpounded Meramec River Basin, Missouri me Re PP CRS ETE RTE CUO TE RCC OP CUTE CULE TORE Trace element geochemistry in the upper Amazon drainage basin (Bolivia) F. Elbaz-Poulichet, P. Seyler, L. Maurice-Bourgoin, J.-L. Guyot and C. Dupuy Book Reviews Gas Hydrates: Relevance to World Margin Stability and Climate Change G.R. Dickens Advanced Mineralogy. Volume 3. Mineral Matter in Space, Mantle, Ocean Floor, Biosphere, Environmental Management, and Jewelry Isotope Geoscience Section Stable isotope fractionation between liquid and vapour in water—salt systems up to 600°C K.I. Shmulovich, D. Landwehr, K. Simon and W. Heinrich Contents of Volume 157, 1999