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Browsing Геология России by Title
Now showing items 6320-6339 of 39126
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(2002)Glacierised areas present an ideal environment in which to study water-rock interaction, since chemical weathering rates are high and anthropogenic impacts are often minimal. Detailed investigations of meltwater quality ...
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(PANGAEA, 2008-02-22)
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(2004)Over the recent years, while executing the geological mapping of the Lithuanian territory at a scale of 1:50 000, attention have been given to kame terraces adjoining the recessional marginal ridges left by glacier lobes ...
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(2004)Field and archival data have been used in compiling the Glaciotectonic Map of Estonia. Two principal types of glaciotectonic deforma- tions shown on this are discussed here: dislocations of rigid bedrock, and soft bed ...
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(2001)Molecular dynamics (MD) simulation provides a unique window into the dynamics of amorphous silicates of geochemical importance. Of special interest are theories of the glass transition and viscosity when an equilibrium ...
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(2001)Nakhla augite and olivine grains commonly contain glass-bearing inclusions. In contrast to olivines, augites host only one type of multiphase inclusions which consists of euhedral to subhedral augite, Ti-magnetite and ...
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(1995)Peridotitic xenoliths from melanephelinites of Sal Island, Cape Verde Archipelago, have a compositional range from moderately depleted Iherzolites to refractory harzburgites. Most xenoliths have protogranular textures but ...
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(2000)An extensive comparison between world-wide occurrences of mantle glasses in both continental and oceanic settings is presented here. Several localities were chosen on the basis of the available major (and trace) element ...
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(2003)The D'Orbigny angrite contains abundant glasses, a phase which has not been previously reported from any other angrite. Glasses fill in part open druses and intersticial spaces between major silicates, or occur as glass ...
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(2004)It is shown that glauconite was mainly formed under diagenetic conditions in terrigenous–clayey rocks (Rausven Unit) of the Lower Cambrian Virbalis Formation in western Lithuania. This was preceded by bioturbation at some ...
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(2004)Mg-calcite-cemented bioturbation traces, glendonite aggregates of idiomorphic, bi-pyramidal crystals and porous, amber-colored carbonate concretions were recovered from a methane-dominated cold vent area in 380 m water ...
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(1989)Petrologic and geochemical study of the products of deep-seated metasomatism helps to bring out inhomogeneities in the composition of the lithosphere that could be related to the redistribution and subsequent mobilization ...
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(1992)New petrographic descriptions and analyses of the mica of glimmerite (or slyudite) and similar rocks found in xenoliths from explosion pipes, dikes and intrusives of the Central and South Tien Shan and East Pamirs are ...
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(2003)We constructed global phase velocity maps including azimuthal anisotropy. Azimuthal anisotropy is expanded on a basis of generalized spherical harmonics, which makes the calculation of path integrals of the phase velocity ...
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(2004)The concept of plate tectonics provides a general framework to fit the distribution and general characteristics of volcanoes. There remain, however, many details of volcanic activity that are difficult to explain solely ...
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(2004)The distribution of 218 Campanian marine ostracod genera from 38 geographical areas was used for a quantitative palaeobiogeographical analysis. The data were analysed using multivariate statistical methods, ordination ...
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(2004)A model of the global biogeochemical cycles coupled to a energy-balance climate model (the COMBINE model) is used to identify the causes of two large δ13C value excursions across the Frasnian-Famennian (F-F) boundary. We ...
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(2003)The global climate of the Vendian has been the subject of considerable debate. In view of the difficulties of stratigraphic correlations, the absence of reliably reconstructed positions of continents, the scarcity of climate ...
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(2004)It is widely accepted now that the anthropogenic impact is mainly responsible for current climatic changes. It is considered that this factor determines an almost global temperature growth, as well as intensity and frequency ...
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(2002)Although volcanic-associated massive sulphide (VMS) deposits have been studied extensively, the geodynamic processes that control their genesis, location and timing remain poorly understood. Comparisons among major VMS ...
Now showing items 6320-6339 of 39126