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Browsing ELibrary by Title
Now showing items 11791-11810 of 21821
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(1998)Volcanic gases have contributed to the development of the Earth's atmosphere to a large extent. Today, the sulfur budget of the atmosphere is still much influenced by volcanic degassing. Even though the total flux of sulfur ...
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(1997)The pressure evolution of a cooling and crystallising body of magma stored in the crust is sensitive to the depth and vertical extent of the chamber and also to the volatile content of the magma. In shallow sill-like ...
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(2002)Measurements of the Li isotopic compositions of lavas from magmatic arcs worldwide suggest common processes at work that lead to the retention of isotopically heavy Li in the mantle. Samples from this study derive from the ...
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(2001)Resurgent doming consists of the uplift, usually accompanied by volcanic activity, of part of a collapse caldera. Analogue models were used to investigate the architecture of resurgent domes. Dry sand simulates the brittle ...
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(2003)Biodegradation rates in oilfields have been assessed conservatively using whole oil-column minimum rate estimates, diffusion-controlled oil column compositional gradient modelling and mixed oil kinetic models. Biodegradation ...
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(1993)Isotopic age investigations have been carried out on samples from the late Pliocene Eldzhurtinskiy granite (Great Caucasus, Russia) in order to elucidate the cooling history of this kilometere sized plutonic body. The ...
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(2005)A suite of experiments was performed to investigate the partitioning of Sr2+ (to mimic the radionuclide 90Sr) between calcite and artificial groundwater in response to the hydrolysis of urea (ureolysis) by Bacillus pasteurii ...
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(2001)The core has often been suggested as a source for He presently found in the mantle. If the core served as the long-term storage reservoir for He in ocean island basalts with distinctively high 3He/4He ratios, then the ...
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(1999)Correlations between mean annual temperature (MAT) and the weighted average oxygen isotope composition of yearly precipitation (δ18Opt) are well-known, but the utility of modern relations to make reliable estimates of ...
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(1999)A major disadvantage of the electron microprobe is its inability to determine Li, which may make up an essential component in micaceous minerals. Correct classification of micas and proper calculation of their formulae ...
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(1995)The relationship between the reduction in fission-track diameter and the reduction in areal track density in hydrated glass shards has been investigated under varying annealing and etching conditions. A near 1:1 relation ...
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(2004)Dauphas et al. [Astrophys. J. 565 (2002) 640–644] reported molybdenum isotopic anomalies in differentiated and bulk primitive meteorites. It is shown here that these isotopic anomalies correlate with one another in exactly ...
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(1997)The chemistry of Be and B in the solar nebula is reinvestigated using thermodynamic equilibrium calculations. The dominant Be gases are monatomic Be at high temperatures and the hydroxides BeOH and Be(OH)2 at lower ...
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(1999)We review long-standing reports of both the `Hg paradox' that Hg abundances in meteorites are inconsistent with its volatile behavior and the anomalous 196Hg/202Hg ratios in all types of extraterrestrial material. A careful ...
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(1995)The free energy of formation of Cr2O3, defined by the reaction2 Cr + 32 O2 = Cr2O3, has been measured electrochemically using a yttria-doped thoria (YDT) solid electrolyte, in the temperature range from 900 to 1400 K. Fe ...
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(2003)Data on the Paleozoic and Mesozoic fossil plants of Northern Caucasia have been collected and integrated by the author on the basis of an electronic database. The structure of this database is aimed at the effective ...
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(1987)Upper Cretaceous carbonate sequences contain omission surfaces, hardgrounds and intercalations of ‘clays’. These ‘clays’ are largely associated with submarine biogeochemical carbonate dissolution that was caused by high ...
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(2001)Single crystals of Li-aegirine LiFe3+Si2O6 were synthesized at 1573 K and 3 GPa, and a polycrystalline sample suitable for neutron diffraction was produced by ceramic sintering at 1223 K. LiFe3+Si2O6 is monoclinic, space ...
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(2003)The three binary garnet solid solutions FeII3Al2Si3O12–XII3Al2Si3O12 (XII = MgII, MnII, CaII) have been investigated by 57^Fe Mssbauer spectroscopy at 298 and 77 K and by electronic structure calculations in the local spin ...
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(2002)Beryllium is not a very abundant element in the Earth, but, being an incompatible element in common rock-forming silicate minerals, it is susceptible to concentration via fractionation in geochemical processes. Moreover, ...
Now showing items 11791-11810 of 21821