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Browsing ELibrary by Title
Now showing items 3119-3138 of 21879
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(2003)Many studies have shown that discrete (blind) faults at depth are commonly linked to more distributed deformation, in particular folding, at higher levels. One category of fault-related folds, forced folds, is common where ...
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(2003)Tomographic inversions of geophysical data generally include an underdetermined component. To compensate for this shortcoming, assumptions or a priori knowledge need to be incorporated in the inversion process. A possible ...
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(2004)A semi-analytical, semi-numerical method of seismogram synthesis is presented for piecewise heterogeneous media resulting from an arbitrary source. The method incorporates the discrete wavenumber Green's function representation ...
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(2004)The statistical method of linear discriminant analysis has been applied to distinguish Pliocene to Recent basic rocks on the basis of their major-element composition. Studied basic rock suites are from four tectonic settings: ...
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(1997)High-frequency regional records from small earthquakes (magnitude <4.5) and comparable magnitude chemical explosions are analyzed to find a reliable seismic discriminant in southern Russia near Kislovodsk. The digital, ...
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DISCUSSION OF RECENT PAPERS ON CARBONATED PERIDOTITE, BEARING ON MANTLE METASOMATISM AND MAGMATISM (1987)The solidus temperature for peridotite-CO2 drops sharply within a narrow temperature interval, with increasing pressure, to an invariant point where dolomite becomes stable at the solidus. This geometry presents a barrier ...
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(1989)The attainment of equilibrium between basalt and residual peridotite depends on the relative magnitudes of melt segregation rate and solid residue re-equilibration rate. Garnets and pyroxenes (and perhaps spinels) require ...
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(2003)Melt migration and segregation, and the rheology of partially molten rocks in the upper mantle and lower crust, strongly depend on the grain-scale distribution of the melt. Current theory for monomineralic aggregates ...
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(2001)A series of experiments were designed to investigate the textural and compositional changes that take place during disequilibrium partial melting of chondritic material. Chips of the L6 chondrite, Leedey, were heated at ...
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(2000)Irreversible thermodynamics treat disequilibria in Earth's open systems, gravitational fields, and gradients in temperature, pressure, and composition. Equilibrium studies on closed systems lack gradients and apply most ...
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(2001)Magnesiowustite is likely the second most abundant and probably weakest lower-mantle phase. Its deformation properties will therefore influence the rheological and dynamic behaviour of this region. In this study magnesiowustite ...
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(2003)Three samples of gem quality plagioclase crystals of An60 were experimentally deformed at 900 °C, 1 GPa confining pressure and strain rates of 7.5-8.7x10-7 s-1. The starting material is effectively dislocation-free so that ...
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(2006)Estimation of the framework connectivity and the atomic structure of depolymerized silicate melts and glasses (NBO/T > 0) remains a difficult question in high-temperature geochemistry relevant to magmatic processes and ...
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(2004)The Early Paleoproterozoic (2.46-2.36 Ga) Belomorian drusite (coronite) complex was addressed to for the first time in discussing the geology, petrology, and genesis of dispersed intrusive mafic-ultramafic magmatism that ...
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(2000)CaY1-xBO4: xEu was synthesied by solid state reaction method, and the displacement and luminescence of the Eu3+ in CaYBO4 host were studied. Two luminescent centers could be observed at certain Eu3+ -concentration, indicating ...
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(1990)This article presents the results of experimental studies of the processes by which gas is displaced by water from models of fractured-porous media that meet the appropriate criteria of simulation. The difficulties of ...
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(2001)The phase transitions in deuterated lawsonite were investigated with high-resolution, time-of-flight neutron diffraction between 2 and 500 K. From the analysis of spontaneous strain data, the thermodynamics of the phase ...
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(2001)This paper describes quantitative methods for evaluating the distribution of focal mechanism orientations of groups of earthquakes, and shows how to display this distribution on a triangle diagram. We present a χ2-based ...
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(2004)The detailed analysis of EPR and luminescence spectra of natural 1aB diamonds with plastic deformation traces is given and the effect of P,T treatment on nitrogen defect transformation in this crystals is investigated. As ...
Now showing items 3119-3138 of 21879