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Browsing ELibrary by Title
Now showing items 2367-2386 of 21934
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(1987)The authors analysis indicates that the principal factor determining whether xenoliths are transported to the surface is the fluid content in the magma-filled fissure Mafic and ultramafic magmas undersaturated in volatiles ...
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(2001)Principal compositional features of Riphean gabbroids and associated titanomagnetite deposits on the western slope of the Urals are generally related to P-T conditions and the fluid regime of their formation. At low fluid ...
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(1989)To establish the origin of the Dubravinskoye carbonatites more accurately, we undertook to determine the isotopic characteristics of a number of widespread minerals, considering that the isotopic data on such rocks, now ...
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(1988)Detailed study of the upper Riphaean Min'yara formation of the southern Urals and the fossilized organic matter occurring in it enabled the author to show that the properties of these fossils correlate with several ...
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(1988)A rare-earth fluoride of sodium and calcium with the formula NaCaREF6 was discovered in 1958 in an albitized granite (apogranite) pluton and called gagarinite. It is a typomorphic mineral of rare-metal alkalic metasomatites, ...
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(1989)After the well-known work by V.I. Kovalenko and N.I. Kovalenko demonstrating the reality of crystallization of topaz from granitic melts rich in fluorine, the number of new finds of ongonite-like rocks increased steadily. ...
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(2003)The first generalization of materials on the oxidation zones of uranium deposits was done by L.N. Belova in her doctoral thesis in 1970. A unique and up to now the only classification of oxidation zones in hydrothermal ...
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(2004)Based on new data on melt inclusions in clinopyroxenes, we have established the physicochemical conditions (magma compositions, temperature, and pressure) of formation of boninites in ophiolites of the Dzhida zone (northern ...
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(2004)Coexisting melt (MI), fluid-melt (FMI) and fluid (FI) inclusions in quartz from the Oktaybrskaya pegmatite, central Transbaikalia, have been studied and the thermodynamic modeling of PVTX-properties of aqueous orthoboric-acid ...
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(1998)Slip rupture processes on velocity-weakening faults have been found in simulations to occur by two basic modes, the expanding crack and self-healing modes. In the expanding crack mode, as the rupture zone on a fault keeps ...
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(1996)The results of deep electromagnetic soundings for the active transition ocean-continent zone at Sakhalin Island are presented. After an averaging procedure of the magnetotelluric response functions, the period range was ...
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(2002)An eccentric loading approach was applied to quantify confinement effects and examine the energy balance in a slab under buckling load. It was indicated that confining pressure provided by fill or broken rock material can ...
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(1997)The stoichiometry of pyrite dissolution by Fe(II) ions was studied in chloride media around pH 2. Pyrite was found to dissolve nonstoichiometrically during the initial tens of hours and a S-rich layer was formed on the ...
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(2001)In-solution atomic-force microscopy was used to characterize molecular dimensions and aggregate structures of natural organic matter (NOM) sorbed to the basal-plane surfaces of muscovite and hematite as a function of pH ...
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(2003)Mineral dissolution rates have been rationalized in the literature by surface complexation models (SCM) and morphological and geometric models (GM), and reconciliation of these conceptually different yet separately highly ...
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(2004)Biostratigraphical study of the early to mid-Ordovician conodont fauna from ribbon-banded radiolarian cherts of the middle Burubaital Formation in Central Kazakhstan reveals an almost complete succession of conodont biozones ...
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(2002)This study is to clarify the geologic time of the Dumugol Formation in the Tanyang area on the basis of conodonts. A total of 245 identifiable conodonts were recovered from 56 samples. They are classified ...
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(2001)The task of this paper is to discuss the Frasnian Stratigraphy of the central region of the Russian Platform; to analyse the distribution of the most abundantly occurring platform conodonts: to revise the zonal schemes ...
Now showing items 2367-2386 of 21934