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Browsing ELibrary by Title
Now showing items 9694-9713 of 22924
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(2001)Natural amphiboles with composition close to the binary join cummingtonite-grunerite and crystals of the same samples annealed at 700 °C for 55.5 h, in order to obtain different degrees of non-convergent cation order, have ...
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(2003)The phenomenon of the iron incorporation into feldspars because of wide abundance is of particular interest for investigators in order to get the information about the conditions of formation and structural features of ...
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(2004)In situ observations of the zircon-reidite transition in ZrSiO4 were carried out using a multianvil high-pressure apparatus and synchrotron radiation. The phase boundary between zircon and reidite was determined to be P ...
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(2002)We have developed a method for including phase boundary conditions into post-glacial rebound models that allows for conduction of latent heat away from the boundary. This method returns the chemical boundary results if ...
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(2002)While the effects of phase transitions of mantle materials are considered in convection studies, models of geophysical processes that occur on shorter timescales, such as seismic normal modes and Earth tides, often ignore ...
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(2001)The specific heat of lawsonite, CaAl2Si2O7(OH)(2).H2O, has been measured in the temperature range 125 K - 325 K. An anomaly is seen at 273 K, which is related to the Cmcm - Pmcn phase transition. The magnitude of the total ...
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(2000)We present experimental data for the Pm3m-I4/mcm phase transitions in the perovskite crystals KMn1-xCaxF3 and SrTiO3. Comparison of calorimetric data (latent heat and specific heat) with order parameter data (measured with ...
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(2002)Phase relations in the natural pyrolitic mantle composition (KLB-1) around 670-km depth have been determined at 1600–2200°C by high-pressure experiments using multianvil apparatus. A phase transition between majorite garnet ...
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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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(2004)The effect of diurnal tides observed during a field experiment investigating the phase-amplitude modulation of a seismoacoustic P wave that propagated in porous oil- and gas-saturated sandstone is explained in terms of ...
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(2002)To more completely assess the origin of associated laurite (RuS2) and Ru-Os-Ir (IPGE) alloy which are found as inclusions in near-liquidus phenocrysts such as chromian spinel, we conducted experiments to evaluate the effects ...
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(2002)A recently proposed predictive parameter of region–time–length (RTL) was tested using the seismological catalogues of Kamchatka (Russia) and Japan Meteorological Agency (JMA). We introduced the RTL algorithm and summarized ...
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(2003)Although rhyolitic lavas and lava domes are characterised by evenly porphyritic textures, not all the phenocrysts are whole euhedra. We undertook image analysis of 46 rhyolitic lava and lava dome samples to determine the ...
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(1990)The long-term seismic forecasts for the island arcs and continental margins of the Pacific Ocean have proved to be correct in a quite large (80 to 90) percentage of cases. This fact suggests that the statistical methods ...
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(2003)We have observed narrow-band, low-frequency (1.5–4 Hz, amplitude 0.01–10 μm/s) tremor signals on the surface over hydrocarbon reservoirs (oil, gas and water multiphase fluid systems in porous media) at currently 15 sites ...
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(2002)The phenyl derivatives of dibenzo[b,d ]furan and dibenzo[b,d ]thiophene, so far not reported in geological samples, have now been identified in some sedimentary rocks, bitumen and hydrothermal petroleum through a comparison ...
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(2002)We document the exsolution of phlogopite and coesite/quartz from pre-existing super-silicic clinopyroxene in dolomite marble from the Kokchetav massif, northern Kazakhstan. The exsolution texture was formed by clinopyroxene ...
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(2004)The phonon density of states (DOS) in iron has been measured in situ by nuclear resonance inelastic X-ray scattering (NRIXS) at high pressures and high temperatures in a resistively heated diamond anvil cell. The DOS data ...
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(1997)The adsorption of phosphate and sulfate on goethite is studied individually and in combination at solution concentrations of phosphate ranging from 10-8 to 10-4 M and of sulfate ranging from 10-5 to 10-3 M. For single anion ...
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(2003)Igneous, metamorphic and biogenic apatite contains Lu and Hf in proportions that make this mineral suitable for dating by the 176Lu–176Hf method. We present a new method for separation of Lu and Hf from apatite that involves ...
Now showing items 9694-9713 of 22924