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Browsing ELibrary by Title
Now showing items 9006-9025 of 21936
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(2004)The paper addresses some methodical aspects of the application of EPR and 1H NMR methods to oil systems. These techniques are also important for the investigation of solid components, caustobioliths, and especially rocks ...
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(2003)Pertsevite is a new Mg borate from a contact-metasomatic kotoite marble from the region east of Verkhoyansk, Sakha-Yakutia, northeastern Siberia. The end member is defined as Mg2BO3F, which is the composition of a synthetic ...
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(2003)Based on the thermodynamic perturbation theory an equation of state (EOS) for molecular fluids has been formulated which can be used for many fluid species in geological systems. The EOS takes into account four substance ...
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(2003)The equation of state (EOS) for 98 pure organic and inorganic fluids formulated by Churakov and Gottschalk (2003) is extended to complex fluid mixtures. For the calculation of the thermodynamic properties of mixtures, ...
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(2001)A new model is proposed to explain, within the framework of the theory of spiral growth of Frank, the formation on inhomogeneous mica polytypes. This model relates the interaction and cooperative growth of two components ...
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(1995)Bulk abyssal peridotites have lower MgO and higher SiO2 than comparable continental peridotites. If these low MgO2 ratios were a primary feature of the oceanic mantle, a major re-evaluation of the concentrations of these ...
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(2001)The kinetics of deformation of a quartz aggregate by pervasive pressure solution can be, under certain conditions of temperature and grain size, strongly dependent upon the diffusivity of silica into the grain-to-grain ...
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(2004)Typomorphic minerals were studied in order to refine the nomenclature of alkaline ultramafic rocks. These are micas and perovskites. We compared chemical compositions of micas from typical kimberlites, such as the Udachnaya ...
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(2001)Petrophysical and petrochemical properties of ferruginous/siliceous rocks reflect their structure and age as well as their tectonic conditions. Prospects of iron quartzites and ores in the central part of the North Krivoi ...
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(1980)The petrochemistry of kimberlites from Yakutia and Lesotho has been studied using a silicate melt model with the SiO2, CO2 and H2O derivatives as the main anions.A model has been developed, according to which the dissolution ...
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(2003)Xenoliths of the pyroxenite-eclogite-granulite suite in alkaline mafic rocks of the Pamirs differ from pyroxenite-eclogite nodules in kimberlites and eclogites in metamorphic complexes in that they have anomalously high ...
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(1989)The aim of our work was to summarize all accessible petrologic and geochemical information on oceanic islands and, from the results, to identify the petrologic and geochemical types of their constituent igneous rocks. The ...
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(2002)This paper summarizes the data available on the concentrations of major and trace elements in kimberlites from various provinces of the world. Arithmetic means were calculated for individual kimberlite pipes and dikes, for ...
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(2002)Systematic regularities in the variations of parameters of ordinary chondrites relating them to iron meteorites like Netschaevo are deduced from a review of the chemical and oxygen isotopic compositions of ordinary chondrites. ...
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(1999)The antidromous and most acid series of a volcanoplutonic belt in the Southeastern Pamirs was studied. It makes up a stratovolcano 1365-3150 m thick and consists of five volcanogenic formations (rhyodacites, trachydacites, ...
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(2003)In the Putorana region of the Siberian continental flood basalt province, tuffs form thin layers or small bodies between single basaltic lava flows. Based on our fieldwork, these ash fall deposits have relatively small ...
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(2004)Six diatreme breccia pipes and 32 dikes, which occurred in late Permian epoch, were found by predecessors in the Wajilitag region located in the western Tarim plate. The dikes belong to ultra-hypabyssal phase of subvolcano ...
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(2005)We measured major, minor, and trace-element compositions for eleven Al-rich chondrules from unequilibrated ordinary chondrites to investigate the relationships between Al-rich chondrules, ferromagnesian chondrules, Ca-, ...
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(2004)Very characteristic formations are considered representing alkaline-salic rocks association with granitoids. The Bokurskii volcano-pluton is investigated, in which large fragments of volcano-pluton structure fragments are ...
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(1998)Experimental results from the systems CaO-MgO-SiO2-CO2, Na2O-CaO-Al2O3-SiO2-CO2, and a primitive magnesian nephelinite mixed with carbonates have been combined for construction of phase diagrams for the pseudoquaternary ...
Now showing items 9006-9025 of 21936