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Browsing ELibrary by Title
Now showing items 4762-4781 of 21821
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(2001)Results of an experimental and theoretical study of the interaction of a first mode internal solitary wave with a localised bottom topography (sill) are presented. Laboratory experiments have been performed in a 10m long ...
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(1988)The paper presents some results of drillhole logging studies in coal seams that function as seismic waveguides. The use of pulsed elastic-wave generators makes it difficult to identify nonlinear interaction of seismic ...
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(1989)It is usually assumed that the asthenosphere resulted from partial melting of polycrystalline rocks of the upper mantle. In this connection, it is useful to turn to our earlier formulation of the problem of motion and heat ...
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(1990)The Dnieper-Donets paleorift (DDR) of Late Devonian age is a typical province of continental, subalkalic and alkalic volcanism that was similar in its principal parameters to the volcanism of classical Cenozoic rift zones. ...
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(2004)The paper considers the genesis, composition, and mineral assemblages of endogenous borates of the ludwigite-vonsenite series in magnesian skarns after dolomites, rocks simulating their composition, and calcareous skarns ...
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(1989)The Udokan complex, whose deposits are exposed in the Udokan Range, in the Kalar Range and in the Kodar Massif in the southwestern part of the Aldan shield, traditionally has attracted attention because it is the Proterozoic ...
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(2004)The geochemistry of the postmagmatic evolution of Mg-Fe borates in metasomatically altered dolomite are considered using the example of deposits in Central and East Asia. It is shown that the ludwigite-vonsenite borate ...
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(2003)The genesis and chemical composition of endogenic ores composed of ortho- and diborates are discussed with reference to Mg-skarn deposits of the hypabyssal and abyssal facies. The orebodies are either restricted to the ...
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(2006)Впервые обнаружен и изучен природный γ-CrOOH из рисчорритов Хибинского щелочного массива Кольского полуострова. Оксигидроксид хрома ассоциирует с гоннардитом, натролитом, филлипси-том, сапонитом. В большинстве случаев он ...
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(1998)Exhumation velocity and cooling rates were calculated for eclogites from the megamelange zone near Mount Sulu-Tyube in the Kokchetav Massif, Kazakhstan. The calculations were based on the reconstruction of the thermodynamic ...
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(2001)Tochilinite, valleriite, and associating minerals were studied in borate ores from the gold-copper magnesian skarn deposits of Transbaikalia and North Korea and calciphyre of Yakutia. It was shown that the appearance of ...
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(2003)Discussed are two probable models for lateral growth of continental crust in the Early Precambrian: accretion of island arcs and accretion of oceanic plateaus. Important constraints on geodynamic settings in which Archean ...
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(1989)The Khibiny alkalic pluton, the largest in the world, is noted for its unusual rocks, structures and associated apatite-nepheline deposits. Analyzing the genesis of the Khibiny apatite ores, various authors proposed the ...
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(2004)The Jaradag Fawn Limestone Formation (∼1.6 Ga, Semri Group, Vindhyan Supergroup, India) contains abundant microfossils and precipitates in early diagenetic (bedded and stromatolitic) cherts. The silicified carbonate ...
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(1990)I have had a rare opportunity to study the numerous gold nuggets in special collections of the USSR, in museums in Moscow, Leningrad (St. Petersburg), and Sverdlovsk (Yekaterinburg), to see them in mine workings and to ...
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(2003)Investigations of hydrocarbons in the bottom sediments of the Sakhalin Island Shelf before exploitation of petroleum and natural gas fields have shown their low concentrations. At the place of the hole drilling, increase ...
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(2001)Structural data on shungite-bearing rocks were used to develop a new model for their nanostructure and the natural processes of their genesis and evolution. A conclusion was made that the natural solid carbon of shungite ...
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(2001)The Berezovskoe gold deposit near the town of Yekaterinburg in the Central Urals is controlled by an array of granitoid porphyry and lamprophyre dikes. Individual fluid inclusions in quartz from veins accompanying metasomatic ...
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(2002)The general model for arc-type basalt genesis is that subducted plates reach a certain depth and release their fluids in a series of dehydration reactions. The fluid migrates into the overlying mantle wedge and initiates ...
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(2004)According to the model proposed for the genesis of Pb-Zn stratiform ore mineralization in carbonate strata, (a) ore-forming elements disseminated in carbonate rocks or contained in them in low concentrations are extracted ...
Now showing items 4762-4781 of 21821