BPoL ELSEVIER Earth and Planetary Science Letters 174 (2000) 41 www.elsevier.com locate/epsl Contents Volume 174 Express Letter The detection of water-wetting in salt-rock by impedance measurement A.D.L. Skelton and S.C. Elphick Regular Letter The osmium riverine flux and the oceanic mass balance of osmium S. Levasseur, J.-L. Birck and C.J. Allegre “Os-'*’Os systematics of Hawaiian picrites A.D. Brandon, M.D. Norman, R.J. Walker and J.W. Morgan Pb, O, and C isotopes in silicified Mooidraai dolomite (Transvaal Supergroup, South Africa): implications for the compo- sition of gig swoon seawater and ‘dating’ the increase of oxygen in the Precambrian atmosphere M. Bau, R.L. Romer, V. Liiders and N.J. Beukes Spatial and temporal prada of biogenic carbonate and opal in deep sea » sedienents from the eastern equatorial Pacific implications for ocean history since 1.3 Ma M.E. Weber and N.G. Pisias Direct ion microprobe U-Pb dating of fossil tooth of a Permian shark Y. Sano and K. Terada , ae Bart U-decay series and trace element systematics in the 1978 eruption of Ardoukoba, Asal rift timescale of magma crys- tallization N. Vigier, B. Bourdon, . Joron and C.J. Allegre Hump-shaped *’ Ar/*’ Ar agea e in K-feldspar and evidence for Crr etaceous authigenesis in the Fountain Formation neat Eldorado Springs, Colorado A.C. Warnock and P.C. van de Kamp How many plumes are there? B.D. Malamud and D.L. Turcotte ; Geochemical observations and one layer méz mntle c« onvection N. Coltice and Y. Ricard MEAGRE Mee ice wean aes ; The flexural rigidity of Fennoscandia: reflection of the tectonothermal age of the lithospheric mantle Y.H. Poudjom Djomani, J.D. Fairhead and W.L. Griffin anes Late Precambrian paradoxical glaciation and obliquity of the Earth — a discussion of dynamical constraints M.A. Pais, J.L. Le Mouél, K. Lambeck and J.P. Poirier Extraction of a lithospheric cooling signal from oceanwide geoid éni ta . DeLaughter, S. Stein and C.A. Stein ers A tcre ae Philippine Sea plate origin for MORB from the inner ¢ slope of “the Izu-Bonin trench S.M. DeBari, B. Taylor, K. Spencer and K. Fujioka ‘ The bubble-by-bubble volatile evolution of two mid-ocean ridge bi alts P. Burnard Chaotic mee p convection in 1 lows- porosity hydrotherm: il systems S. Schoofs, F.J. Spera and U. Hansen Seismological evidence for a low-velocity layer within the subducted sli » of southern Taiwan C.-H. Lin, B.-S. Huang and R.-J. Rau ite isotopes in historical lavas from Mount Vesuvius D.W. Graham and J.E. Lupton Reply to ‘Helium isotopes in historical leven from Mount Vesuvius’, a comment on Noble gas isotopic ratios from historical lavas and fumaroles at Mount Vesuvius’ by D. Tedesco et al D. Tedesco and P. Scarsi 416 Author Index| Biochimica et Biophysica Acta 174 (2000) 415-416 Regular Letters Large volume recycling of oceanic lithosphere over short time scales: geochemical constraints from the Caribbean Larg Igneous Province F. Hauff, K. Hoernle, G. Tilton, D.W. Graham and A.C. Kerr : Timescales of destructive plate margin magmatism: new insights from Santorini, Aegean volcanic arc G. Zellmer, S. Turner and C. Hawkesworth . j Integrated Nd isotopic and U-Pb detrital zircon systematics off ck istic sodimnent iry rocks from the Slave Province, Canada: evidence for extensive crustal reworking in the early- to mid-Archean K. Yamashita, R.A. Creaser and M.E. Villeneuve Neural network interpretation of LWD data (ODP Leg 170) confirm s complete convergent margin E. Moritz, S. Bornholdt, H. Westphal and M. Meschede Ar ’Ar geochronology of flood basalts from the Kerguelen Archipelago, southern Indien Ocean: ‘eaplications ff or Cenozoic eruption rites of the Kerguelen plume K. Nicolaysen, F.A. Frey, K.V. Hodges, D. Weis and A. Giret ey Ar/*’ Ar chronology of the Leucite Hills, Wyoming: eruption rates, erosion rates, wad an evolving cnigecatien structure of the underlying mantle R.A. Lange, I.S.E. Carmichaanedl C.M. Hall Phase transformations and partitioning relations in peridotite under lower mantle conditions B.J. Wood Ferropicrites: geochemical evidence for Fe- tich streaks i3 n upwelling mantle plumes S.A. Gibson, R.N. Thompson and A.P. Dickin The composition of melt inclusions in minerals at the garnet-spinel transition zone P. Schiano, R. Clocchiatti, B. Bourdon, K.W. Burton and B. Thellier Sub-critical two-phase seawater convection near a dike R.P. Lowell and W. Xu Sirsa ae : ; Evolutionary model of the Himalaya—Tibet system: geopoem A.1. Chemenda, J.-P. Burg and M. Mattauer futhor Index Volume 174