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Browsing Геология России by Title
Now showing items 7425-7444 of 39126
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(1989)The identifying property of ophiolite is the pseudostratified grouping from the bottom up of ultramafics, gabbro, basalt and cherty sediments. In many ophiolite complexes these rocks have been tectonically separated, and ...
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INTERNALLY CONSISTENT DATABASE FOR SULFIDES AND SULFOSALTS IN THE SYSTEM AG2S-CU2S-ZNS-SB2S3-AS2S3 (2000)An updated thermodynamic database for Ag2S-Cu2S-ZnS-Sb2S3-As2S3 sulfides and sulfosalts applicable to temperatures above 119°C is developed to calculate phase relations for polybasite-pearceite- and fahlore-bearing ...
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(Springer, 2017-01-17)Airborne volcanic ash is one of the most common, far-travelled, direct hazards associated with explosive volcanic eruptions worldwide. Management of volcanic ash cloud hazards often requires coordinated efforts of ...
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(1997)The main results of the International Symposium "Evolution of Permian Marine Biota," are presented. The Artinskian to Ufimian part of the section at the Kozhim River (Polar Urals) is briefly described including its ...
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(1995)Interphase boundary diffusion rates of oxygen and potassium in fine-grained K-feldspar/quartz aggregates were determined experimentally at 450-700°C and 100 MPa (hydrothermal). The starting materials were hot-pressed and ...
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(2013)The interplay of geodynamic and sedimentation processes in the Central Asian orogen and the Siberian craton is discussed in several aspects: (i) general tectonics of the Central Asian orogen, (ii) correlation of deposition ...
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(2001)The interpretation of mineral-water interactions in processes such as surface-charge development, adsorption of aqueous ions onto surfaces, and the kinetics of dissolution at the scale of the oxide-electrolyte-water interface ...
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(2003)In the most basic seismo–acoustic studies at volcanoes, infrasound monitoring enables differentiation between sub-surface seismicity and the seismicity associated with gas release. Under optimal conditions, complicated ...
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(2004)Dioctahedral smectite samples of a wide range of compositions (beidellites, montmorillonites, nontronites, Fe-rich montmorillonites and Al-rich nontronites) were studied by infrared (IR) spectroscopy. A special sample-preparation ...
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(2002)K-Ar dates of illitic clays from sedimentary rocks may contain "mixed ages," i.e., may have ages that are intermediate between the ages of end-member events. Two phenomena that may cause mixed ages are: (1) long-lasting ...
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(2002)Generalized equations using fractional-flow dimensions were derived to estimate the Darcy and seepage velocities obtained from the point-dilution and the single-well injection-withdrawal field tests conducted in fractured-rock ...
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(2001)The isotopic compositions of volcanic rocks were interpreted with the use of factor analysis techniques for data treatment. This study is based on more than 200 analyses for the isotopic composition of Pb, Nd, and Sr of ...
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(2001)A positive heat flow anomaly was detected. Several hypotheses were expressed about it. Among them, the one best fitting the actual situation was selected. Interpretation results show that a zone of recent activation might ...
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(2002)The concentrations and ratios of the major elements determine the physical properties and the phase equilibria behavior of peridotites and basalts in response to the changing energy contents of the systems. The behavior ...
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(2006)Geochemical Data Toolkit (GCDkit) is a program for handling and recalculation of geochemical data from igneous and metamorphic rocks. It is built using the Windows version of R, which provides a flexible and comprehensive ...
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(1999)Variations in the carbon isotopic compositions of marine carbonate and organic carbon provide a record of changes in the fraction of organic carbon buried through time and may provide clues to changes in rates of weathering ...
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(1998)We have formulated dynamic models of processes hypothesized to give rise to observed seismological structure at the base of the mantle. One dimensional seismic models are determined from thermo-chemical convection calculations ...
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(2002)Fault-related folds in contractional settings do not extend indefinitely, but rather commonly terminate as plunging anticlines near the tips of the genetically-related fault. Geologists often attribute the formation of ...
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(1996)Layer stackings in the ideal and real kaolinite structures are considered in terms of layer orientations i = 1, 2, . . . 6, intra- and interlayer displacements of adjacent 0- and T-sheets, s i and t k, distortions of these ...
Now showing items 7425-7444 of 39126