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Browsing ELibrary by Title
Now showing items 3551-3570 of 21879
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(1998)Single-crystal elastic properties of hydrous ringwoodite are reported for samples that were synthesized at 19 GPa and 1300°C. The Mg/Si ratio is determined to be ~1.95 by EPMA, which is slightly lower than that of ideal ...
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(2003)Elastic properties of fluid-saturated porous media with aligned fractures can be studied using the model of fractures as linearslip interfaces in an isotropic porous background. Such a medium represents a particular case ...
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(1999)Data on elastic crustal characteristics beneath Avacha Volcano are presented. The upper crust was found to have strongly varying velocities. Zones of abnormal V(p) and high attenuation were located at various depths under ...
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(1995)Distribution coefficients for radium in heterogeneous equilibrium with gypsum and calcite were determined with solid solutions containing Ra in the mole fraction range 10-10 to 10-7 at 25 +/- 3°C. The correlation approach ...
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(1998)Using an invariant-polarization ultrasound method, we have studied the velocities of elastic waves in the gneisses and amphibolites of the second rock mass of the Archean complex of the Kola superdeep borehole (7622-9456 ...
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(2002)We present a new numerical technique for elastic wave modelling in 3D heterogeneous media with surface topography, which is called the 3D grid method in this paper. This work is an extension of the 2D grid method that ...
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(2003)Geological causes of crustal anisotropy include regional fractures and cracks, isotropic heterogeneity or layering and material composition and textural properties. In addition, shear or metamorphic foliations in fault ...
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(2003)Cracks play a major role in most rocks submitted to crustal conditions. Mechanically, cracks make the rock much more compliant. They also make it much easier for fluid to flow through any rock body. Relying on Fracture ...
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(2003)OH--bearing (hydrous) ringwoodite compressed non-hydrostatically in a diamond anvil cell supports a differential stress that increases from 2.9 to 4.5 GPa over the pressure range of 6.7-13.2 GPa at room temperature. This ...
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(2002)The elasticity of ferropericlase with a potential mantle composition of (Mg0.83,Fe0.17)O is determined using ultrasonic interferometry in conjunction with in situ X-radiation techniques (X-ray diffraction and X-radiography) ...
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(2001)The elastic properties of CaSnO3 perovskite have been measured by both ultrasonic interferometry and single-crystal X-ray diffraction at high pressures. The single-crystal diffraction data collected using a diamond-anvil ...
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(2002)Majorite-garnet solid solutions are major mineral phases in the Earth's upper mantle and transition zone. Here we present the first Brillouin scattering measurements of the elasticity of majorite (Mj, Mg4Si4O12)-pyrope ...
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(2002)This paper presents an elasto-viscoplastic block element method and its application to the deformation and stability study of arch dam abutment slopes. The paper is composed of two parts. The first part concerns the numerical ...
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(2002)We propose a model for the elastodynamical component of frictional interaction between two rough surfaces in contact. We consider the antiplane geometry and obtain the exact solution for stress within the contact of two ...
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(2004)Using the new geological map of the Elbrus Volcano (scale 1:50 000) and the new isotopic datings of the volcanic rocks, the formation history of Elbrus Volcano was found to include a pre-caldera, a caldera, and a post-caldera ...
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(2001)The results of different models of electrokinetic sources of ULF disturbances, mostly based on numerical calculations, can be reproduced with a much simpler analytical model of an elliptic-shaped inhomogeneity. The suggested ...
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(2001)The spinel solid solution was found to exist in the whole range between Fe3O4 and γ-Fe2SiO4 at over 10 GPa. The resistivity of Fe3− x Si x O4 (0.0<x<0.288) was measured in the temperature range of 80∼300 K by the AC impedance ...
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(2004)The generation of transient electric potential prior to rupture has been demonstrated in a number of laboratory experiments involving both dry and wet rock specimens. Several different electrification effects are responsible ...
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(1989)Studies of electric and magnetic fields in the ocean under different seismic conditions are critically important for understanding how the natural electromagnetic field of the ocean is generated and for quantitatively ...
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(1993)Electrical ac-conductivity parameters (real part of impedance (Z′), imaginary part of impedance (-Z″) and parallel capacity (Cp)) of a low iron cordierite single crystal from White Well, Australia (Mg1.91 Fe0.08 Mn0.01Al3.95 ...
Now showing items 3551-3570 of 21879