Browsing ELibrary by Subject "OLIVINE"
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Browsing ELibrary by Subject "OLIVINE"
Now showing items 1-20 of 21
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(2003)Atomistic modelling techniques are used to study the rate-determining steps that limit diffusion of oxygen in forsterite. The activation energies for diffusion parallel to all three crystallographic axes by the vacancy and ...
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(2002)Effects of dynamic recrystallization on lattice preferred orientation (LPO) in olivine were investigated through the combination of two SEM-based techniques, electron backscattered diffraction (EBSD) technique for ...
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(2002)Electrical conductivity of lherzolite (65% olivine), measured as a function of time after changes in the oxygen fugacity (fo2) of the surrounding CO2/CO atmosphere, is used to infer the diffusivity of the point defects ...
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(2006)We have determined the diffusion coefficient of Cr in olivine as function of temperature, oxygen fugacity (fO2), and crystallographic orientation and used these data to develop a quantitative understanding of the resetting ...
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(1996)Partition coefficients of H2O between β and γ phases of olivine stoichiometry and coexisting ultra mafic melt have been estimated to be > 0.1 +/- 0.04 (1σ) and 0.04, respectively; based on experiments at 15-16.5 GPa, ...
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(2002)A practical and reliable method for the preparation of fine-grained forsterite and forsterite-enstatite polycrystals, in the system MgO-SiO2s described. The method employs state-of-the-art techniques from materials science, ...
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(2001)An absolute value for the interfacial free energy of high-angle grain boundaries in olivine/fo90s been derived from a microstructurally equilibrated coarse-grained natural peridotite. The three-dimensional configuration ...
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(2001)High-temperature creep behavior in Ni2GeO4 spinel was investigated using synthetic polycrystalline aggregates with average grain sizes ranging from submicron to 7.4 microns. Cylindrical samples were deformed at constant ...
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(2001)Torsional forced-oscillation and microcreep methods have been employed in a study of the viscoelastic behaviour of fine-grained polycrystalline olivine at high temperatures (to 1300 °C), seismic frequencies and low strain ...
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(1999)Laser shock experiments with olivine have been carried out in order to test the capability of this new experimental approach to produce known shock defects in olivine. To determine the shock conditions, numerical simulations ...
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(1997)Magnetite in the oxidized CV chondrite Allende mainly occurs as spherical nodules in porphyritic-olivine (PO) chondrules, where it is associated with Ni-rich metal and/or sulfides. To help constrain the origin of the ...
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(1997)Numerical simulations of mantle convection in Mars, using an axisymmetric spherical-shell model, show partial layering caused by the two exothermic olivine-spinel (α-β, β-γ) phase transitions. An extended Boussinesq ...
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(2000)Two natural dunites were annealed at pressure P=300 MPa, temperature T=1373, 1473 and 1573 K, and fO2 within the stability field of olivine. The starting materials contained small amounts of hydroxyls in the form of minor ...
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(2003)Infrared powder-absorption spectra of nine natural and five synthetic olivine samples across the forsterite-fayalite join have been investigated at room temperature in the range 70-1400 cm-1. Variations of peak positions ...
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(2003)The partitioning behavior of Ni between olivine and silicate melt in S-bearing systems has been investigated using mid-ocean ridge basalts (MORBs). The Nernst Ni partition coefficient between olivine and silicate melt (DNi) ...
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(2001)The empirical linear relation between volume and logarithm of bulk modulus of a material, discovered by Grover, Getting and Kennedy is taken as the basis for our equation of state. Using the latest experimental information ...
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(1999)Both seismological observations and mineral physics experiments suggest that old and cold subducting slabs might contain a wedge of metastable olivine (`MO'). Dynamically consistent models of subducting slabs, in which the ...
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(2003)To calculate accurately the pressure interval and mineral proportions (i.e. yields) across the olivine to wadsleyite and wadsleyite to ringwoodite transformations requires a detailed knowledge of the non-ideality of Fe-Mg ...
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(2002)The variation of the oxygen content in olivines, (FexMg1-x)2SiO4, with 0.2 ≤ x ≤ 1.0, was investigated by thermogravimetric measurements. Mass changes occurring upon oxygen activity changes were measured as a function of ...
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(1999)This study investigates the effects of variations in the relative fugacities of oxygen and sulfur on the wetting of mantle olivine by molten sulfide. Experiments were performed on mixtures of San Carlos olivine and synthetic ...
Now showing items 1-20 of 21