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Browsing ELibrary by Title
Now showing items 12346-12365 of 21936
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(2002)Mica fish and tourmaline fish from natural mylonites were analysed in thin section to determine their orientation distribution. They are oriented with their long axes tilted with respect to the mylonitic foliation, and ...
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(2002)Visible to near-infrared (NIR) reflectance spectra and mid-IR transmittance spectra are presented here for a collection of dioctahedral smectites. Analysis of the structural OH vibrations is performed by comparing the NIR ...
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(1995)High-F (5.4 wt%) and low-F (0.8 wt%) biotites were reacted with aqueous (Cu, Na2)Cl2 solutions at ambient conditions to investigate biotite oxidation mechanisms at low temperatures and pressures and at atmospheric pO2. The ...
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(1997)Sulfur is a potential light element in the liquid outer core of the Earth. Its presence in segregating metal may have had an influence in distribution of metal-loving (siderophile) elements during early accretion and core ...
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(2001)The dynamic coupling between plate motion and mantle convection is investigated in a suite of Cartesian models by systematically varying aspect ratios and plate geometries. The aim of the study presented here is to determine ...
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(1997)This study quantifies the influence of the four major dissolved solutes found in terrestrial and marine environments on the dissolution kinetics of quartz. Dissolution rates are dependent upon the concentration and identity ...
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(1995)We present numerical calculations of nonlinear magnetoconvection in a rotating spherical shell. We derive equations for thermal convection in a rotating spherical shell in the presence of a uniform azimuthal magnetic field, ...
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(1998)As a major volatile in volcanic systems, water has a significant influence on the rheological properties of silicic magmas. This is especially so at minor water contents relevant to the emplacement of silicic lavas. To ...
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(1996)A two-dimensional numerical convection model in cartesian geometry is used to study the influence of trench migration on the ability of subducted slabs to penetrate an endothermic phase boundary at 660 km depth. The transient ...
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(1995)We have studied the dynamical effects of a stratified viscosity profile on time-dependent mantle circulations by using a 3D Boussinesq spherical-shell convection model. This particular viscosity profile, taken from the ...
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THE INFLUENCES OF SURFACE TEMPERATURE ON UPWELLINGS IN PLANETARY CONVECTION WITH PHASE TRANSITIONS (1998)The importance of surface temperature for mantle convection appears with the presence of adiabatic heating and cooling and the release and consumption of latent heat in the presence of phase transitions. For some planetary ...
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(1999)We have measured the surface controlled dissolution rates of natural calcium carbonate minerals (limestone and marble) in H2O-CO2 solutions by using free drift batch experiments under closed system conditions with respect ...
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(2002)We define the characteristics of plume events that can be called superplumes. Using the surface area of the smallest oceanic plateau generated during the Cretaceous superplume era, we define a cutoff surface area for ...
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(2000)The existing database for paleointensity estimates of the ancient geomagnetic field contains more than 1500 data points collected through decades of effort. Despite the huge amount of work put into obtaining these data, ...
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(1992)29Si, 27Al and 23Na NMR data are presented for a variety of dry and dydrous aluminosilicate glasses. For 29Si and 27Al spectra only minor differences were observed between dry and hydrous glasses, but significant changes ...
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(1995)The interaction of aqueous silver ions with pyrite, galena, and sphalerite and of silver chloride complexes with pyrite and galena has been investigated using X-ray photoelectron and Auger electron spectroscopies, scanning ...
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(1998)Using both laboratory experiments and theoretical models, we examine the different flow regimes that may develop when an ash flow encounters a ridge. For very small ridges, all the flow may pass over the ridge. For ...
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(1999)The interactions of high-field-strength cations with haplogranite melts of peraluminous to peralkaline compositions were examined by determining the saturation of rutile as functions of the concentrations of the oxides of ...
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(2004)Intercept-based methods of generating a point estimate of a calibrated radiocarbon date are very popular, but exhibit undesirable behaviour. They are highly sensitive to the mean of the radiocarbon date and to adjustments ...
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(2005)We know that giant planets played a crucial role in the making of our Solar System. The discovery of giant planets orbiting other stars is a formidable opportunity to learn more about these objects, what is their composition, ...
Now showing items 12346-12365 of 21936