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Now showing items 15705-15724 of 39126
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(1995)Metallographic cooling rates of group IVA iron meteorites have been recalculated based on the most recent Ni diffusion coefficients and phase diagram. The cooling rates are revised upwards by a factor of ca. 15 relative ...
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(2004)Six paleothermal and paleohydrologic settings in Callovian-Oxfordian seas of northwestern Eurasia are modeled for six time intervals corresponding in duration to the substage. The modeling principle is based on the study ...
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(2004)The thermal state of the upper mantle beneath tectonic structures of various ages and types (Archaean cratons, Early Proterozoic accretionary and collisional orogens, and Phanerozoic structures) is characterized by geotherms ...
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(1998)We study the thermal structure around a cold deformable lithospheric slab as it sinks to the core-mantle boundary and migrates along it. We present analytical results for the steady thermal structure established by a steady ...
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(2004)The thermal structure of stable continental lithosphere is determined by (1) the concentration and distribution of heat sources within the crust and (2) the amount of heat input from the convecting mantle. The self-consistent ...
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(PANGAEA, 2009-09-27)The sediment temperature distribution at mud volcanoes provides insights into their activity and into the occurrence of gas hydrates. If ambient pressure and temperature conditions are close to the limits of the gas hydrate ...
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(1996)Research was carried out to study the enthalpy of formation of natural leucite using the method of high temperature calorimetry. A study was also made of the phase transition in this mineral using the method of Calve ...
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(1986)On a plot of log sulfur activity versus inverse absolute temperature, the variation in published pyrite/pyrrhotite curves below 500°C is larger than expected from the precision of the measurements. The precise data by Rau ...
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(1981)Based on mineralogical themometry and baroraetry and computation of mineral reactions modelling metamorphic sequence, a geotherm for metamorphic belts of the subduction zones has been deduced. Relatively low PT-values (3 ...
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(2000)The thermodynamic and kinetic properties of a synthetic uranophane (Ca(H3O)2(UO2)2(SiO4)2 . 3H2O) have been determined from dissolution experiments in test solutions of different bicarbonate concentrations at 25°C. The ...
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(1989)The density functional method was used to study the properties of a binary mixture watercarbon dioxide confined within an infinitely long cylindrical pore of 8 to 25 Å in diameter, over a wide range of temperatures, pressures ...
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(2005)Various modern applications of empirical electron density models need realistic structures of the electron density distribution with smaller scales than the model background. Travelling Ionospheric Disturbances (TIDs) ...
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(2006)Reported in this paper are the results of the analysis and generalization of the geological, radiometric, paleomagnetic and biogeographical data obtained in the Western, Central, and Eastern Tien Shan during the study of ...
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(1987)To identify the faults controlling the intensity of recent tectonic processes in the region and to study their geometry and dynamics, one of the variants of the statistical method was used-trend analysis. The map of recent ...
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(2001)The complicatedly intercalated marine and continental Permian beds of the Timan-Pechora region are subdivided using the combination of the litho- and biostratigraphic methods and the sequence stratigraphy technique. Among ...
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(1998)The combined analysis of the changes in the geomagnetic inversion frequency, in the changes of the 87 Sr/ 86 Sr values in the marine carbonate sediments and in the migration rate of the East European continent in the ...
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(2002)The time-averaged geomagnetic field on the core-mantle boundary is interpreted using numerical models of fluid dynamos driven by non-uniform heat flow. Dynamo calculations are made at Prandtl number $Pr = 1$, magnetic ...
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(2003)In this paper, a fracture mechanics model is developed to illustrate the importance of time-dependence for brittle fractured rock. In particular a model is developed for the time-dependent degradation of rock joint cohesion. ...
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(2003)Seismic Electric Signals are transmitted through the earth by following diffusion type equations. This, when also considering the heterogeneity of the earth's crust, plays a key-role in the explanation of the recent finding ...
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(2000)To understand the thermal evolution of the mantle following the aggregation of non-subductable thick continental lithosphere, we study a numerical model in which a supercontinent, simulated by high viscosity raft, HVR, ...
Now showing items 15705-15724 of 39126