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Browsing ELibrary by Title
Now showing items 12053-12072 of 21821
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(1997)Unit-cell parameters of magnesite have been measured to high precision between 0 and 7 GPa using single-crystal X-ray diffraction. The isothermal bulk modulus of magnesite determined from fitting a Birch-Murnaghan third-order ...
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(1998)The velocity of sound in liquid water has been measured as a function of temperature and pressure in the heated diamond-anvil high-pressure cell. The equation of state is determined at temperatures up to 200°C and pressures ...
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(2002)Dynamically recrystallized and sutured quartz grains from metamorphic rocks with different strain intensities and temperature conditions ranging from ca. 350°C to ca. 700°C have been studied. Universal-stage measurements ...
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(2003)The equilibrium form of the Earth is generally computed using a hydrostatic theory that assumes a rotating, inviscid planet. We compute the perturbation to this equilibrium form due to the presence of a thin elastic ...
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(2004)Large-scale Permian-Triassic magmatism of northern and central Asia has been recently proved to be of plume origin. Based on these concepts, the present paper considers a possible relationship between the evolution of the ...
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(2004)This article provides evidence for the existence of a Eurasian transregional latitudinal lineament. This lineament, 40-100 km wide, extends along 52° N from the Warsaw area to Sakhalin Island between 24° and 146° E over ...
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(1999)Long periodic geodynamic processes with durations between 150 and 600 Million years appear to be in phase with similar galactic cycles, caused by the path of the solar system through the spiral arms of the Milky Way. This ...
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(2002)Changes in the shell morphology (shell shape, size, ornamentation, and suture) of the genus Uraloceras in the Sakmarian and Kungurian are analyzed. The dynamics of species diversity within this genus and its spatial ...
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(2004)Groundwaters, river and lake waters have been sampled from the semi-arid Siberian Republic of Khakassia. Despite the relatively sparse data set, from a diversity of hydrological environments, clear salinity-related trends ...
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(2003)We review observations of bubble size distributions (BSDs) generated during explosive volcanic eruptions and laboratory explosions, as inferred from vesicle size distributions found in the end products. Unimodal, polymodal, ...
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(2000)The authors of this paper discuss the specific geological structure and structural evolution of dome- and shear-type structural features in the region northwest of the Onega Lake. These structural features are associated, ...
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(1999)Numerical modeling of the evolution of plume beneath continental lithosphere with drastic variations in thickness is performed. It is shown that plume beneath continental lithosphere behaved differently than that beneath ...
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(1989)In this paper we will compare the Riphean (Late Proterozoic) ophiolites of the North Baikalian region and Polar Urals of the Bohemian and Saxonian granulite massifs, the Paleozoic ophiolites of West and East Sayan, Urals, ...
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(2000)Radiolarians are protozoans that have existed for more than 500 million years. Paleozoic radiolarians (dating from 550-250 million years ago) were represented by three orders, 16 families, and 76 genera. Eighty per cent ...
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(1998)In this contribution, we have developed an evolutionary model in order to identify and quantify processes which were able to reproduce rare gas and nitrogen isotopic abundances in the main terrestrial reservoirs. The ...
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(2001)The distribution of rock-forming and accessory minerals, major and trace elements in silty-sandy rocks along the tectonic profile was estimated from analyses of composite samples made up of 14000 individual samples, ...
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(1994)Two main geochemiscl types of granites are distingushed in the Salmi pluton: 1) ovoid biotite-hornblende granites, 2) non-ovoid biotite granites. The first one is characterized by higher CO2, CO and CH4 concentrations. The ...
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(1998)During the Upper Triassic times about 75 m of halite with minor anhydrite was deposited in the Lorraine basin. Samples of halite and sulfates were systematically collected from a borehole intersecting the sequence. The ...
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(2004)This paper presents an integrated geophysical study of the southern margin of the East European Craton (EEC) in the Karpinksy Swell-North Caucasus area. It presents new interpretations of deep refraction and wide-angle ...
Now showing items 12053-12072 of 21821