Table Of Content

ELSEVIER Earth and Planetary Science Letters 132 (1995) 245-246 Contents Volume 132 Scaling laws and geochemical distributions C.J. Allégre and E. Lewin Argon diffusion and solubility in silicic glasses exposed to an Ar—He gas mixture D.S. Draper and M.R. Carroll Magma dynamics at Mt Etna: Constraints from U-Th—Ra—Pb radioactive disequilibria and Sr isotopes in historical lavas M. Condomines, J.-C. Tanguy and V. Michaud Paragenetic specularite and adularia (Elba, Italy): Concordant (U + Th)-He and K-Ar ages H.J. Lippolt, R.S. Wernicke and R. Bahr Focused fluid flow during subduction: Oxygen isotope data from high-pressure ophiolites of the western Alps A.C. Barnicoat and I. Cartwright Grenvillian granulite-facies metamorphism in the Arequipa Massif, Peru: a Laurentia-Gondwana link H.A. Wasteneys, A.H. Clark, E. Farrar and R.J. Langridge Is the upper mantle metal-saturated? C. Ballhaus Stability of possible Fe—FeS and Fe—FeO alloy phases at high pressure and the composition of the Earth’s core D.M. Sherman Authigenic cadmium enrichments in suboxic sediments: Precipitation and postdepositional mobility Y. Rosenthal, P. Lam, E.A. Boyle and J. Thomson Magnesioferrite spinel in Cretaceous /Tertiary boundary sediments of the Pacific basin: Remnants of hot, early ejecta from the Chicxulub impact? F.T. Kyte and J.A. Bostwick A proposed giant radiating dyke swarm fragmented by the separation of Laurentia and Australia based on paleomagnetism of ca. 780 Ma mafic intrusions in western North America J.K. Park, K.L. Buchan and S.S. Harlan Paleomagnetism and magnetic fabrics from the Springdale and Wigwam Redbeds of Newfoundland and their implications for the Silurian paleolatitude controversy J. Stamatakos, A.M. Lessard, B.A. van der Pluijm and R. Van der Voo 141 The influences of lower mantle viscosity stratification on 3D spherical-shell mantle convection S. Zhang and D.A. Yuen 157 The influence of toroidal magnetic field on thermal convection in the core P. Cardin and P. Olson 167 Experimental partitioning of Zr, Nb, and Ti between platinum group metals and silicate liquid: implications for the origin of refractory metal nuggets in carbonaceous chondrites S.R. Jurewicz, J.H. Jones and B. Fegley Jr The low viscosities of F + H,O-bearing granitic melts and implications for melt extraction and transport D.R. Baker and J. Vaillancourt The importance of apatite composition and single-grain ages when interpreting fission track data from plutonic rocks: a case study from the Coast Ranges, British Columbia P.B. O’Sullivan and R.R. Parrish Express Letter A mechanism for syn-collisional rock exhumation and associated normal faulting: Results from physical modelling A.I. Chemenda, M. Mattauer, J. Malavieille and A.N. Bokun 246 Contents Volume 132 Discussions Particie recycling in hydrothermal plumes: Particle recycling in the TAG hydrothermal plume by C.R. German and R.S.J. Sparks Comment by G.F. Lane-Serff The Pb isotopic evolution of the Earth: inferences from river water suspended loads by Y. Asmerom and S.B. Jacobsen Comment by K.J. Spencer and J.J. Mahoney Reply by Y. Asmerom and S.B. Jacobsen Author Index Volume 132 Contents Volume 132 ANNOUNCEMENT Rapid reviewing and publication of short original papers Earth and Planetary Science Letters publishes an “Express Letter Section" for short, original papers. To qualify for publication in the Express Letter Section, papers should meet the following criteria: * They should be highly original and/or contain new results of unusual importance. Their length should not exceed 5 journal pages. They should be sent to the appropriate editor by the fastest possible means and clearly marked “Express Letter". Three copies of the paper should be submitted, accompanied with the original figures and a diskette bearing the text, preferably in DOS format (detailed specifications for diskette submission are given in the “Notes to Contributors"). The total time from submission to publication will be approximately 3 months.