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Browsing ELibrary by Title
Now showing items 2467-2486 of 21934
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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. ...
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(2003)The reductive dissolution of FeIII (hydr)oxides by dissimilatory iron-reducing bacteria (DIRB) could have a large impact on sediment genesis and Fe transport. If DIRB are able to reduce FeIII in minerals of high structural ...
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(1996)Chlorine is the most abundant halogen in sedimentary formation waters with concentrations from <100 to >250000 mg/l. Bromine is the second most abundant halogen at <1 mg/l to >6000 mg/l with iodine from <0.1 mg/l to >100 ...
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(1999)Because strontium and magnesium occur in seawater with nearly constant ratios to calcium, variations in Sr/Ca and Mg/Ca in modern foraminifer shells are due to the influence of environmental parameters on calcification. ...
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(1997)Potentiometric titrations of quartz, kaolinite, feldspar, and partially hydrolysed polyacrylamide (HPAM), and sorption measurements of HPAM on the minerals, allows identification of the general mechanisms of polyacrylamide ...
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(2003)Submarine sand reservoir distribution and architecture across slope and base-of-slope systems vary as a function of accommodation, sediment flux rates, substrate mobility and sand-mud content. Slopes evolve through time ...
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(2001)Sulfur isotope fractionation experiments during bacterial sulfate reduction were performed with recently isolated strains of cold-adapted sulfate-reducing bacteria from Arctic marine sediments with year-round temperatures ...
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(2001)A new box model for the global carbon-calcium-strontium cycle is developed to simulate the evolution of Cretaceous and Cenozoic seawater and atmosphere. The model accounts for carbon masses in ocean and atmosphere, in ...
Now showing items 2467-2486 of 21934