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Browsing Геология России by Title
Now showing items 3885-3904 of 39126
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(1998)A mechanism of diffusion of isotopically tagged water in crystalline quartz by molecular diffusion and network exchange is compared to previous experiments. Three experimental factors are explained by this mechanism. (1) ...
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(1999)Exact solutions to equations governing isothermal diffusive dissolution of a crystalline slab in a ternary liquid were obtained to include the effect of coupled chemical diffusion in the liquid. These analytical results, ...
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(2004)The large differences in He and Ar diffusivities in silicate minerals could result in fractionation of the He/Ar ratio during melting of the mantle, producing He/Ar ratios in the primary mantle melts that are higher than ...
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(2009)By crushing olivine and pyroxene phenocrysts in volcanic rocks from Kyushu Island, Japan, we determined 3He/4He of 3–7 Ra and 40Ar/36Ar of up to 1750. These values are lower than those of MORB. 4He/40Ar⁎ (down to 0.1) is ...
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(2002)We have developed a numerical model to investigate the importance of diffusive chemical fractionation during production and transport of melt in Earth’s upper mantle. The model incorporates new experimental data on the ...
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(2006)U-series radioactive disequilibria in basaltic lavas have been used to infer many important aspects of melt generation and extraction processes in Earth’s mantle and crust, including the porosity of the melting zone, the ...
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(2002)A new technique for imaging convection in the outer core is presented, which is based on mean field electrodynamics. The method assumes a frozen magnetic flux balance for the global-scale part of the fluid velocity in the ...
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(2002)Diffusion through `wetted' grain boundaries is often the rate limiting process during rock deformation by intergranular pressure solution. However, the underlying processes operative within such boundaries are poorly ...
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(1995)Diffusional characteristics of two biologically active surface sediments were determined by use of a combined N2O-O2 microsensor. By analyzing changes in the N2O-gradients in these sediments, it was possible to determine ...
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(1996)Chemical diffusivities approximating tracer diffusivities of Sr, Nd, and Pb have been measured in a natural rhyolite melt at 1.0 GPa and temperatures from 1000 to 1450°C using the diffusion couple technique. Diffusivities ...
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(2004)An algorithm, Determination of Earth Surface Structures (DEST), is presented to reconstruct digital terrain models of complex landforms from topographic data, such as contour lines and spot heights. The algorithm provides ...
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(IOP Publishing, 2016)The article focuses on study in the properties of low-permeable reservoirs. The object of the research is the Bazhenov formation rocks taken from a well drilled in an oilfield of the West Siberian basin. A series of ...
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(2003)Three techniques of digital photogrammetry have been applied successfully to laboratory analogue models to study surface displacements caused by various volcano deformation types. Firstly, side-perspective videos are used ...
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(2014)The digital repository "Geology of the Russian Far East" is developed in Laboratory of Information Technologies of the Far East Geological Institute of the Far East Branch of Russian Academy of Sciences, within the framework ...
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(2001)Image analysis of lacustrine sediments has become a useful method in paleolimnology, since correlation between grey-scale and different climate and sediment proxies has turned out to be very promising. Based on experiences ...
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(2015)Abstract A large dike intrusion and fissure eruption lasting 9 months began on November 27, 2013, beneath the south flank of Tolbachik Volcano, Kamchatka, Russia. The eruption was the most recent at Tolbachik since the ...
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(2002)A much-discussed topic in seismology deals with how and under which loading conditions soil shows nonlinear behavior and how this can be verified from seismograms. Seismologists have been seriously searching for signatures ...
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(1989)To understand the role of internal sources, it is useful to distinguish between large- and small-scale (in terms of deformation) fluctuations. The large-scale fluctuations appear to result directly from the release of ...
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(2001)Based on a dye tracer experiment in a sand tank we addressed the problem of local dispersion of conservative tracers in the unsaturated zone. The sand bedding was designed to have a defined spatial heterogeneity with a ...
Now showing items 3885-3904 of 39126