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Browsing ELibrary by Title
Now showing items 4737-4756 of 21638
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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 ...
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(2003)Our study of magmatic rocks provides grounds for discussing the successive phases and geodynamic conditions of continental crust generation between 3.2-2.83 Ga within the Fennoscandian shield. Three tectono-magmatic phases, ...
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(2002)The giant Mn ore deposits of the Paratethys are located on the slopes and/or margins of deep basins. The Eocene ocean and associated basins were strongly influenced by large-scale submarine hydrothermal activity which ...
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(2002)Genesis of the Nyurundukan ultramafic-Mafic pluton, Baikal mountain land was discussed. The massif was determined to consist of three intrusive phases, each of which was accompanied dike rocks. The results demonstrated ...
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(1989)In the cratonic basin that was studied by us, which inherited the structure of the Devonian rift trough, the Lower Carboniferous gray coal measures and overlying Lower and Middle Carboniferous carbonate and clastic deposits ...
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(2001)A new approach for inverting several geophysical parameters at the same time from altimeter and marine data by implementing genetic algorithms (GAs) is presented. These original techniques of optimization based on ...
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(1998)Selected warm and cold water strains of the coccolithophorid Emiliania huxleyi and the closely related species Gephyrocapsa oceanica were cultured under controlled temperature conditions to assess genetic and physiological ...
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(1995)From molecular and isotopic data obtained with a new separation technique, and from published data, it is possible to discuss the relative importance of genetic and post-genetic molecular and isotopic fractionations affecting ...
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(2002)The most typical features on the octahedral faces and rhombic dodecahedroidal surfaces of natural diamonds from kimberlites are described. The surface features are classified into three groups by their coexistence on the ...
Now showing items 4737-4756 of 21638