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Browsing Геология России by Title
Now showing items 3095-3114 of 39126
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(2004)Earth orientation parameters as observed by space-geodetic techniques show a broad spectrum of frequencies. Many efforts have been made to relate spectral peaks to geophysical processes, such as atmospheric or oceanic ...
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(2004)The Markovian model of mixed-layering that has been used until now for the modeling of X-ray diffraction (XRD) patterns of 2:1 phyllosilicates describes the mixed-layer crystals as stacks of 'layer units' (LUs) that associate ...
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CONSOLIDATION OF CONTINENTAL CRUST IN LATE ARCHAEAN-EARLY PROTEROZOIC TIMES: A PALAEOMAGNETIC TEST (2003)The proposition that continental crust consolidated during late Archaean-early Proterozoic times as spatially distinct groups of cratons is tested using palaeomagnetic results assigned to the interval 2900-2200 Ma. Geological ...
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(2004)The constitutive coupled equations describing ionic transport in a porous shale are obtained at the scale of a representative elementary volume by volume averaging the local Nernst-Planck and Stokes equations. The final ...
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(2001)Modeling water flow in unsaturated fractured rocks is of interest to many areas of active research, including geological disposal of nuclear waste and subsurface contaminant transport. A commonly used approach for modeling ...
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(2003)Results from a small set of laboratory experiments are presented here that help further constrain the processes governing the production of turbidity currents from impulsive failures of continental shelf and slope deposits. ...
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(2004)The study presented here sought to determine the PVT properties of Ice VII at elevated temperatures and pressures up to 60 GPa using a Mao-Bell type diamond anvil cell with an external Mo-wire resistance heater. The unit ...
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(1997)A method is proposed for calculating freezing point depressions in silicate systems of geologic interest using molecular dynamics simulations. The method directly determines the slope of the liquidus at a given composition ...
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(2000)We develop a new method, based on interference patterns between the precession and obliquity components of geological data from Ocean Drilling Program (ODP) Leg 154 and astronomical solutions, to extract small changes in ...
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(2002)New cores from the upper continental slope off Romania in the western Black Sea provide a continuous, high-resolution record of sedimentation rates, clay mineralogy, calcium carbonate content, and stable isotopes of oxygen ...
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(2004)Earlier piston-cylinder experiments in our laboratory produced a collection of mantle melting run products at 1.0 GPa that have now been analyzed by ion probe for selected REE, Ti, Cr, Rb, Sr, Y, Zr, and Nb. Natural starting ...
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(2004)The density jump $(ΔρICB )$ at the inner core boundary (ICB) is an important constraint on the dynamics and history of the Earth's core. Two types of seismological data sensitive to $ΔρICB $ have been studied since the ...
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(1997)We have analyzed Sb in a variety of mantle-derived volcanic rocks, peridotites, and in the CI chondrite Orgueil by spark source mass spectrometry. Concentrations vary from 0.02 to 0.8 ppm in oceanic basalts (mid-ocean ridge ...
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(2004)We investigate the constraints that may be placed on earthquake epicentres without assuming a model for seismic wave speed variation within the Earth. This allows location improvements achieved using 1-D or 3-D models to ...
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(2001)The phase lag by which the Earth's body tide follows the tidal potential is estimated for the principal lunar semi-diurnal tide M2. The estimate results from combining recent tidal solutions from satellite tracking data ...
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(1996)The ratio, ν, of relative shear (S) to compressional (P) lateral seismic velocity variations is potentially an important constraint on the mineral physics of the Earth's lower mantle. Recent seismic results show that there ...
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(2007)New and published data on the composition of melt inclusions in olivine (Fo73_yi) from volcanoes of the Kamchatka and northern Kurile Arc are used 1) to evaluate the combined systematics of volatiles (H2O, S, Cl, F) and ...
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(1987)Major intrusions of granitic rocks are found in several tectonic settings and, in all cases, crustal melts may contribute to the volumes of granitic magma. High-grade metamorphism and partial melting of the crust take place ...
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(2002)Primary Os-rich platinum-group minerals (PGM) (e.g., laurite-erlichmanite series (RuS2-OsS2) and Os-Ir-Ru alloys) are potentially the best tracers of mantle melting events, which may be unequivocally recognised during ...
Now showing items 3095-3114 of 39126