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Browsing ELibrary by Title
Now showing items 2447-2466 of 21821
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(1996)Trace element compositions of amphibole (+/-phlogopite) - bearing spinel lherzolite xenoliths have been investigated with regard to their oxidation state and tectonic setting to evaluate the processes associated with the ...
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(2002)The induced magnetic signature at satellite altitude associated with crustal and mantle electrical heterogeneities is examined using five different Earth models. The three-dimensional induction problem is solved in these ...
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CONTRIBUTION OF CARBONATE ACCUMULATION RATE TO DECLINE IN CONCENTRATION OF PHOSPHORUS IN LAKE SEVAN (1989)The eutrophication of Lake Sevan that has resulted from the drawdown of its level has destabilized the calcium carbonate systems, which in turn has affected the precipitation of calcium carbonate by disrupting the natural ...
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(1997)To study whether tungsten isotopic ratios observed in terrestrial samples relative to W ratios in an iron meteorite could be made by neutron-capture reactions in the iron meteorite, the fluxes of thermal and epithermal ...
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(1987)Numerous independent observations contradict the hitherto accepted notions as to the contribution that shear-induced metamorphism makes to the overall metamorphic process. The authors attempt to review this, based primarily ...
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(2003)Representing seismic waves numerically by, for example, the discrete wavenumber method, we normally decompose waves into P -SV and SH components. This scheme, however, cannot treat the exactly vertically travelling S -wave ...
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(2004)We present here the first comprehensive study of the chemical composition of accretion ice from Lake Vostok. Ion chromatographic analyses were performed on samples obtained along the deeper part of the Vostok ice core. ...
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(2002)This short paper shows that different choices made for control functions of information in hydrodynamic flow problems can have significant implications for interpretations of the system. Using as a simple illustration the ...
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(2003)When using 36Cl to date very old groundwater in regional aquifer systems, knowledge of the subsurface 36Cl input into the aquifer system is essential. Although 36Cl can be produced through nuclear reactions in the subsurface, ...
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(2002)We show that folding of a non-Newtonian layer resting on a homogeneous Newtonian matrix with finite thickness under influence of gravity can occur by three modes: (1) matrix-controlled folding, dependent on the effective ...
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(2001)Opportunities for controlling the stressed state of underground structures have been considered. It has been shown that method of oriented fluid break is efficient technique of control. Physical and mathematical models of ...
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(2003)Gravity driven mass-flow deposits proven by sedimentary and digital echosounder data are indicative for prevailing dynamic sedimentary conditions along the continental margin of the western Argentine Basin. In this study ...
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(1998)An important control on river biogeochemistry and sediment load is the process of water exchange between primary channels and the flood plain, particularly in low-relief areas containing lakes, ephemeral channels, and other ...
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(1996)Magnetotactic bacteria produce two general types of minerals as the mineral phases of their magnetosomes: iron oxides and iron sulfides. The iron oxides include only ferrimagnetic magnetite (Fe3O4) and the iron sulfides, ...
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(2001)New controlled pneumatic punch machine has been developed. Design of production prototype of the punch machine has been described. It has been tested under field conditions. Results of the tests have been presented. Efficient ...
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(2002)The time-domain surface electric fields produced by a step current in collocated grounded sources can be represented by an apparent resistivity tensor defined by the relationship between the measured (time-varying) electric ...
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(2001)In a laboratory experiment, different iron salts (FeCl2, FeCl3, FeSO4) and Fe2O3 were added to a phosphate enriched silty loam sediment in order to study their effect on phosphate mobilisation. Phosphate concentrations in ...
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(2004)Dissolution experiments were conducted on {1014} cleavage faces of calcite at various under-saturations to determine how the saturation state controls etch pit formation. Experimental observations were made by using in ...
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(2004)Postseismic deformation is well documented in geodetic data collected in the aftermath of large earthquakes. In the postseismic time interval, GPS is most sensitive to creep in the lower crust or upper mantle activated by ...
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(2005)Alkenone unsaturation ratios of sedimentary lipids are used as a geochemical proxy for sea surface temperatures, and interest is growing in their potential as indicators of different water masses and possibly of salinity. ...
Now showing items 2447-2466 of 21821