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Now showing items 4113-4132 of 38944
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(2002)The complex interaction between CrIIIaq and manganite (γ-MnOOH) was systematically studied at room temperature over a pH range of 3 to 6, and within a concentration range of 10-4 to 10-2 M CrOH2+aq. Solution compositional ...
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(1989)Various phenomena accompanying the passage of seismic signals through real media can be explained by the theory of the block structure and jointing of the medium. This theory explains the fact that the range of frequencies ...
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(2001)Recrystallization processes in plagioclase porpyroclasts were studied in samples from an anorthositic gabbro of the Jotun Complex, South Norwegian Caledonides. The deformation took place at a temperature of approximately ...
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(2001)The backstripping method that is widely used in basin analysis sometimes fails for salt-bearing basins because the highly mobile and buoyant salt deforms its sedimentary overburden. We present a numerical approach for 2-D ...
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(2002)Contaminant transport by groundwater in a sloping aquifer is considered in the case when contaminant plume has a salinity (and density) different from that of the groundwater, and is heat generating. Forced convection is ...
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DYNAMIC WEATHERING MODEL: CONSTRAINTS REQUIRED BY COUPLED DISSOLUTION AND PSEUDOMORPHIC REPLACEMENT (1995)In lateritic weathering parent mineral grains are partly replaced by oxides and oxyhydroxides and partly congruently dissolved. The replacement of a parent grain by an oxide at a site results from the physical coupling of ...
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(2001)Recent field and laboratory studies indicate that the viscosity of the middle and lower continental crust may be 1018 Pa s or less in regions of high heat flow. Such strikingly low viscosities must strongly facilitate ...
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(2004)Using a regional upper-mantle model with an unprecedented spatial resolution of ∼100 m, we have investigated at multiple resolutions the character of incipient magma chambers forming under oceanic arcs. The magma chambers ...
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(2004)A possible explanation of variations in the spatial localization of stresses and earthquakes related to them is given. It is assumed that the pressure gradient between the bottom and upper surface, tensile stresses and ...
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(2004)Decrease of the velocity of a pressure wave in magma by the presence of bubbles is regarded as a fundamental process in seismoacoustic activities of a volcano. However, we show that the large viscosity of magma (≥105 Pa ...
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(2005)An important aspect of continental rifting is the progressive variation of deformation style along the rift axis during rift propagation. In regions of rift propagation, specifically transition zones from continental rifting ...
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(2004)The development of instability and retrograde saturation of magma melts as a result of their cooling are accompanied by the following complex dynamics of phase front evolution near the upper contact of igneous bodies at ...
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(1987)A discussion is presented of the problem of the ascent of a certain volume (body) of light matter in a homogeneous upper mantle. Experimental data indicate that during ascent, the upper boundary should be deformed and ...
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(2000)Composition of the Jurassic (Hettangian-Tithonian) foraminiferal communities in three paleozoochores: Tethyan, Boreal-Atlantic, and Arctic, is considered. Foraminiferal taxons of all ranks (from species to orders) are ...
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(2004)The spectral analysis of the TERRA-ASTER satellite image of the Caspian Sea surface revealed the active fluidal dynamics in underwater mud volcanoes and fault zones. The images clearly show the mass release of hydrocarbons ...
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(2004)We have performed a parametric study on the dynamics of trachytic (alkaline) versus rhyolitic (calc-alkaline) eruptions by employing a steady, isothermal, multiphase non-equilibrium model of conduit flow and fragmentation. ...
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(2003)Gas exsolution and segregation are fundamental controls on eruption dynamics and magma genesis. Basaltic magma loses gas relatively easily because of its low viscosity. However, bubbles grown by decompression and diffusion ...
Now showing items 4113-4132 of 38944