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Browsing ELibrary by Title
Now showing items 3079-3098 of 21934
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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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(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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(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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(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 ...
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(2004)The Brovar’s condition of minimizing the Earth’s anomalous gravity field focused to the determination of the parameters of the Earth’s mean ellipsoid has been discussed and applied in two modified and simplified versions. ...
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(2002)The surface water of the marine environment has traditionally been viewed as a nitrogen (N) limited habitat, and this has guided the development of conceptual biogeochemical models focusing largely on the reservoir of ...
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(2001)The occurrence and distribution of dinoflagellate cysts in surface sediments from the Laptev Sea shelf and the adjacent continental margin have been studied in relation to surface water conditions. Assemblages were interpreted ...
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(2002)Seismic profiles and mollusks have been used to suggest that from ∼12 500 to 7000 yr BP, the Black Sea was an isolated freshwater lake containing potable water and implying a surface salinity of <1. According to Ryan and ...
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(1995)Eucrite, howardite, and diogenite members of the achondrite meteorites are considered by many to be genetically related. Therefore, each provides a piece of the puzzle for reconstructing magmatic processes on the eucrite ...
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(1998)Dissolution experiments of diopside and anthophyllite were conducted in continuously stirred flow-through reactors at temperatures of 25° and 90°C at acid pH. Stoichiometric steady state was reached at # 2700 h (at 25°) ...
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(2003)EET 90102 is the first known diopside-bearing EL6 chondrite. Diopside occurs in most aubrites and is occasionally found as rare small grains in unequilibrated enstatite chondrites, but is unknown from equilibrated enstatite ...
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DIOPTASE (2002)Describes the characteristic of dioptase. Description of the various bluish shades; Exhibition of cleavage and conchoidal to uneven fracture; Characterization as copper silicate hydroxide.
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(1997)The recoil distance of 39Ar is a vital discriminant among geochronological models. Direct measurement of recoil is possible by studying 39Ar implantation in SiO2 glass from a KCl crystal, and comparing one such glass ...
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(2001)A direct method for the determination of lead isotopic ratios by laser ablation-inductively coupled plasma-quadrupole mass spectrometry (LA-ICP-QMS) is presented. Samples of lake sediments were ground and pressed as pellets ...
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(2002)Chemical erosion in glacial environments is normally a consequence of chemical weathering reactions dominated by sulphide oxidation linked to carbonate dissolution and the carbonation of carbonates and silicates. Solute ...
Now showing items 3079-3098 of 21934