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Browsing ELibrary by Title
Now showing items 3631-3650 of 21934
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(2002)Emanation thermal analysis (ETA), based on radon release measurements from previously labeled samples, was used for the first time in the characterization of the thermal behavior of natural Mg2+-vermiculite (Santa Olalla, ...
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(2003)Gradual downstream fining along gravel-bed rivers is often followed by a relatively abrupt change to a sand bed. This has usually been explained by the breakdown of pebbles of certain lithologies to sand, but it is not ...
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(2002)The equilibrium 3/1 - xFe1 - xS + 6/1 - xAg + 2O2 = Fe3O4 + 3/1 - xAg2S (i) was studied over a temperature interval of 800-1050 K by measuring the oxygen partial pressure in a solid-state galvanic cell with the use of an ...
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(2004)Methane emission and rhizospheric CH4 oxidation were studied in stands of Equisetum fluviatile, a common cryptogam in boreal lakes. The experiment was performed in mesocosms with organic sediment or sand bottoms under ...
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(2003)New empirical calibrations for the fractionation of oxygen isotopes among zircon, almandine-rich garnet, titanite, and quartz are combined with experimental values for quartz-grossular. The resulting A-coefficients (‰K 2) ...
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(2000)The elucidation of thermal histories by geochronological and isotopic means is based fundamentally on solid-state diffusion and the concept of closure temperatures. Because diffusion is thermally activated, an analytical ...
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(2001)Measurements of oxygen isotope fractionations between coexisting igneous titanite (Ttn) and zircon (Zrc) have been used to formulate a self-consistent, empirical calibration of equilibrium oxygen isotope partitioning: 1000 ...
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EMPIRICAL GARNET-BIOTITE-PLAGIOCLASE-QUARTZ (GBPQ) GEOBAROMETRY IN MEDIUM- TO HIGH-GRADE METAPELITES (2004)On the basis of the net transfer reactions among garnet, biotite, plagioclase and quartz (for both Mg and Fe end-member models), the garnet–biotite–plagioclase–quartz (GBPQ) geobarometer was empirically calibrated under ...
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(2002)Two empirical garnet-muscovite geothermometers, assuming no ferric iron (Model A) and 50% ferric iron (Model B) in muscovite, respectively, were calibrated under the physical conditions of P=3.0-14.0 kbar and T=530-700 °C. ...
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(1985)As a result of a study on the influence of Cr on geothermometry and geobarometry empirical garnet-orthopyroxene geobarometry has been refined. The applicability to simple and complex systems is demonstrated and the modelling ...
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(2003)Depth-distance dependent bias in body-wave magnitude is investigated using the International Seismological Centre (ISC) dataset from 1978 to 1993. Large deviations in M(b) determination at varying epicentral distances using ...
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(1997)A collection of ground-motion recordings of small to moderate (Ms <= 6.2) earthquakes has been obtained in the epicentral area of the Racha earthquake, 29 April 1991 (Ms = 7.1), which occurred in the southern slope of the ...
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(2002)The Adam-Gibbs equations describing relaxation in silicate melts are applied to diffusion of trace components of multicomponent liquids. The Adam-Gibbs theory is used as a starting point to derive an explicit relation ...
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(2003)One of the most commonly used methods of estimating the size of shallow earthquakes is the surface-wave magnitude scale, $M s $. It has been known since the inception of the scale that the $M s $ of a seismic disturbance ...
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(2002)We analyze seismic and acoustic data from a series of controlled truck bomb explosions to develop scaling laws and functional relations between charge size and various waveform properties. The explosions had yields of 3-12 ...
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(1995)Currently available models to simulate naturally occurring mineral–melt equilibria use mineral components limited to tholeiitic basalt compositions and thus they cannot be used for alkali-rick basalts and basanites. To ...
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(1996)Results of joint research on macrofauna and conodonts are presented in the paper. Based on new data, the relationship between conodont and regional zones was established for the first time, and boundaries between the stages ...
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(2003)One of the main decisions to be made in operational hydrology is to estimate design floods for safety purposes. These floods are generally much rare events that have already been systematically recorded and consequently ...
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(2002)Most unroofing mechanisms invoked for the exhumation of blueschist-plus-eclogite terranes, including corner-flow and extensional collapse of the orogenic wedge, predict steep unroofing paths for the deeply-buried rocks and ...
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(2002)Episodes of endemism during Sinemurian-Pliensbachian times are described from synthetic data (publications and unpublished collections) about ammonite faunas of the western reaches of the Tethys. The Lusitanian, Sub-Betic ...
Now showing items 3631-3650 of 21934