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Browsing ELibrary by Title
Now showing items 11851-11870 of 21821
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(2001)Plane-wave pseudopotential total energy calculations have been applied to investigate the structure and energetics of the Cs/K exchange into interlayer sites in muscovite mica. Novel muscovite structures were designed to ...
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(2002)Crystals of synthetic melanothallite, Cu 2 OCl 2 , have been prepared by chemical transport reactions. Its crystal structure (orthorhombic, Fddd, a 7.4691(15), b 9.5969(19), c 9.700(2) Å, V 695.3(2) Å 3 , Z = 8) has been ...
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(2001)We interpret Global Positioning System measurements of interseismic deformation throughout the western Tien Shan in the context of a block model which accounts for important geologic features (faults) and physical processes ...
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(2002)Over the past decade, there have been many significant advances in the area of accessory minerals research, notably permitted by the development of imaging and in situ measurement techniques. In this paper, we review some ...
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(2003)We studied the nucleation and growth of cataclastic fault cores from fractured damage zones in extensional and strike-slip fault zones in carbonate rocks. Analysed fault zones have similar protolith lithology and sedimentary ...
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(2004)The Danube Canyon is a large shelf-indenting canyon that has developed seaward of the late Pleistocene paleo-Danube valley. Mechanisms of canyon evolution and factors that controlled it are revealed by analyzing the ...
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THE DECISION ON THE PRECAMBRIAN-CAMBRIAN BOUNDARY STRATOTYPE: A BREAKTHROUGH OR MISLEADING ACTION? (1997)The official decision to chose a section in the Burin Peninsula, Newfoundland, as the global stratotype for the lower Cambrian boundary and to define this boundary by the appearance of the trace fossils Trichophycus ...
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(1995)During explosive volcanic eruptions, fragmented silicic magma and volatiles exit the vent with pressures typically in the range 10-100 atm and at the speed of sound of the mixture. We show that for magmatic volatile contents ...
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(2003)We develop an algorithm quantifying the energy flux of T phases recorded at island stations following major teleseismic events, which we further scale by the seismic moment $M 0 $ of the earthquake, to define a T -phase ...
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(2003)We develop an algorithm quantifying the energy flux of T phases recorded at island stations following major teleseismic events, which we further scale by the seismic moment M0 of the earthquake, to define a T-phase efficiency, ...
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(2001)The shrinkage of the Aral Sea ranks as one of the world's greatest man-made environmental disasters. While there is some hope for a separated northern part, the main sea is doomed
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(2001)This study uses information on composition, thermal state and petrological thickness to calculate the densities of different types of subcontinental lithospheric mantle (SCLM). Data from mantle-derived peridotite xenoliths ...
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THE DEPENDENCE OF LABRADORITE DISSOLUTION AND SR ISOTOPE RELEASE RATES ON SOLUTION SATURATION STATE (2000)Labradorite dissolution kinetics and Sr release rates were measured as a function of the saturation state of weathering solutions in column reactors. During the first 750 hours, rapid, nonstoichiometric dissolution was ...
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(1999)The dependence of iron and europium partitioning between plagioclase and melt on oxygen fugacity was studied in the system SiO2(Qz)-NaAlSi3O8(Ab)-CaAl2Si2O8(An)-H2O. Experiments were performed at 500 MPa and 850 °C/750 °C ...
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(2000)The responses of α-Al2O3 and In2O3 dissolution rates to pH-jumps in flow-through reactors are compared to previous results for α-Fe2O3 in order to test the following hypothesis: because the same fundamental processes of ...
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(2000)Periods of transient nonsteady state dissolution can contain much information about dissolution mechanisms. Here, pH-jump-induced dissolution transients are used to explore the kinetics of production, at pH 3 and pH 6, of ...
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(1996)The depletion of the siderophile element tungsten (W) in the bulk silicate Earth (BSE), due to core formation, provides clues to the formation and early evolution of the Earth. This study significantly improves our knowledge ...
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(1991)It is often proposed that the onset of fluid immiscibility may be a direct cause of ore deposition, with evidence cited from fluid inclusions associated with the ore minerals. A reaction-path model is used here to calculate ...
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(1998)We have determined the pressure and temperature of the spinel-garnet transition close to the solidus of fertile and depleted peridotite from a combination of synthesis, sandwich and garnet-seeded experiments. Garnet is ...
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(2003)An acid- and transfer-prepared, juvenile Rhamphorhynchus muensteri , despite some fragmentation, is in an excellent state of three-dimensional preservation, exposing exquisite anatomical details hitherto unknown in other ...
Now showing items 11851-11870 of 21821