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Browsing ELibrary by Title
Now showing items 7554-7573 of 21934
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(2002)The incorporation of molecular water into the c-parallel structural channels in end-member beryl temperature-pressure range 400-950 °C and 1-14.5 kbar (PH2O= Ptot). Time-dependent studies ensured that the incorporation of ...
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(1997)The heterogeneous isotopic composition of C3 and C4 plants can be used to follow the fate of plant carbon into soil organic molecules. Thus, after 23 years of maize cropping (C4) on a soil which was previously under C3 ...
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(2002)This paper deals with the growth behaviour of the Mn-Ca-CO3-H2O solid solution-aqueous solution system on calcite {104} surfaces. This system represents a model example, which allows us to study the effect of a number of ...
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(2003)A Raman spectroscopic investigation of the Si02-clathrate melanophlogite was undertaken to investigate enclathrated molecules. The Raman spectra show the presence of N2, CO2, and CH4, molecules based on the observation of ...
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(2004)The isotopic composition of Mo (δ97/95Mo) in seawater is ~2%% heavier than Mo in marine ferromanganese crusts and nodules [Barling et al., Earth Planet. Sci. Lett. 193 (2001) 447-457; Siebert et al., Earth Planet. Sci. ...
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(2003)New high-precision isotope ratios of dissolved Mo in seawater from different ocean basins and depths show a homogeneous isotope composition (‘mean ocean water 98Mo/95Mo’ (MOMO)), as expected from its long ocean residence ...
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(1998)We report the isotopic composition of molybdenum in twenty-three presolar SiC grains from the Murchison meteorite which have been measured by resonant ionization mass spectrometry (RIMS). Relative to terrestrial abundance ...
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(2000)The molybdenum partition between fluid phases of the composition H2O-NaCl (with NaCl concentrations ranging from 0 to 100%) and melts of natural and synthetic aluminosilicates was examined at a temperature of 800°C and ...
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(2004)This chapter summarizes the results of the first wave of examinations of Mo stable isotopes in nature. These efforts reveal large, systematic variations in Mo isotope compositions in the ocean system that are apparently ...
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(2000)Molybdenum in sedimentary rocks and sediments has evoked interest as a paleo-environmental indicator of reducing conditions. This application demands better understanding of Mo deposition mechanisms and in turn, requires ...
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(2002)A numerical modelling approach that simulates cracking and failure in rock and the associated seismicity is presented and a technique is described for quantifying the seismic source mechanisms of the modelled events. The ...
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(2002)The study of localized failure under controlled conditions can be accomplished within a laboratory setting with the University of Minnesota plane-strain compression apparatus. The device provides an opportunity to observe ...
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(1999)An investigation of the chemical composition of monazite from a number of localities has been carried out. Samples used include monazites from metamorphic rocks, granitic rocks and a hydrothermal ore deposit. The REE ...
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(2001)Monazite grains from nine different Precambrian rock samples and having concordant isotope dilution U-Pb and Th-Pb ages were used to develop and evaluate techniques for U-Pb, Th-Pb, and Pb-Pb isotopic dating using an ion ...
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(2003)Synchrotron X-ray photoelectron As 3d and S 2p spectra of gersdorffite reveal that the surface monolayer includes two types of surface anionic species, As-S dimers and As-S multimers (probably tetramers), the latter being ...
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(2000)Monitoring of subsoil volumetric radon activity in the Paratunka geothermal field began in late October 1997. The aim of this work was to find correlation between the Rn behavior and the geodynamic environment in Kamchatka. ...
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(1997)Clay fractions and glauconite (clays) lose 30-80% of the 39Ar produced by the nuclear transformation 39K(n, p)39Ar during irradiation in a reactor. As a result it has not been possible to date clays by the 40Ar-39Ar ...
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(2000)Shock recovery experiments of plagioclase feldspar in contact with pyroxene, shock-loaded at 36-53 GPa, showed that monomineralic glass of plagioclase was mixed with brecciated pyroxenes with virtual absence of mixed-mineral ...
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(2002)The progress in cladistics promoted the revival of the concept of the monophyletic origin of mammals. The discovery of the Early Cretaceous monotreme Steropodon in Australia gave impetus to the development of these ideas. ...
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(2004)Compounds of the meta-autunite group containing monovalent cations (Li, Na, K, Rb, Cs, Ag, TI) have been synthesized by diffusion in gels or by hydrothermal methods, and their crystal structures determined. Single-crystal ...
Now showing items 7554-7573 of 21934