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Now showing items 15645-15664 of 39126
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(2003)The iron oxide–water interface is of interest not only in geochemical and environmental processes, but also in fields ranging from corrosion to photocatalysis. The structure of α-Fe2O3 (001) surfaces is not fully understood, ...
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(2002)The structure of tuperssuatsiaite from the Aris phonolite in central Namibia was refined to an R index of 0.075 for 905 observed reflections [I > 2σ(I)] obtained with a four-circle X-ray diffractometer. Tuperssuatsiaite ...
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THE STRUCTURE OF SPECIES, OUTCOMES OF SPECIATION AND THE 'SPECIES PROBLEM': IDEAS FOR PALEOBIOLOGY (2001)Paleobiologists reviewing the recent literature on species concepts are likely to come away with the impression that the fundamental unit of biodiversity is impossible to define in terms of a universal concept that applies ...
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(1997)The equilibrium fluid-solid dihedral angle has been determined for H2O-CO2 fluids and Ar in halite polycrystals at 1-2000 bars and 300-600°C. The H2O-halite angle is a sensitive function of pressure and temperature and ...
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(2001)The vertical cross section and evolution of the major mineral phases were studied in the Layeredcomplex of the Late Devonian Voikar ophiolite association. The complex consists of two megarhythms sepa-rated by a transitional ...
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(2001)The Lukkulaisvaara intrusion (U-Pb age: 2442 ± 1.9 Ma), in northern Karelia, Russia, belongs to the Oulanka plutonic group. The intrusion cuts rocks of the Archean granite - migmatite - gneiss basement and is disconformably ...
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(2004)In natural waters, manganese oxides (MnOx) are important in mediating the bioavailability of tracemetals such as Ni, Cu, Zn, Cd, and Pb, as these metals readily adsorb to the MnOx surface. Manganese from a variety of ...
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(1998)The deep structure of the Paleozoic carbonatite complexes in the Kola Province has been studied by an original 3D density modeling method based on gravity prospecting data. Analysis of intrusions to depths of 12-22 km shows ...
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(2004)The structural architecture of the south Urals foreland fold and thrust belt at the transition into the Precaspian Basin is that of a wedge-shaped, west-vergent thrust stack with a significant amount of basement involvement. ...
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(2000)We have investigated the adsorption of the uranyl ion (UO22+) in contact with amorphous silica (SiO2), γ-alumina (Al2O3), and montmorillonite surfaces in the pH range of 3.1-6.5, using X-ray absorption fine structure (XAFS) ...
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(2001)Development of a phylogenetic classification has been a primary pursuit of crinoid paleontologists during the 20th century. Wachsmuth and Springer and Bather vigorously debated crinoid classification during the waning years ...
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(1988)The Kamchatka Peninsula, located at the joint of continental and oceanic plates, is a most interesting object for geodynamic studies. In view of this, during the last two decades eight geodynamic polygons have been organized ...
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(2002)Soil erosion by water involves the processes of detachment, transport and deposition of soil materials by the erosive forces of raindrops and surface flow of water. The redistribution of sediment within a field-sized area ...
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(2004)The method for recognition and monitoring of ULF electrotelluric signals with steep fronts is presented. The method is based on the multicomponent measurements of the geoelectric field and recognition of the clusters of ...
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(Федеральное государственное бюджетное образовательное учреждение высшего образования «Уральский государственный горный университет», 2017)The author considers chromite-bearing ore zone at deposit No. 217 of the southern part of the Verkh-Neyvinsky massif composed of dunites with disseminated chromite ores. The ore zone has a sustained thickness of about 50 ...
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(Общество с ограниченной ответственностью «Георесурсы», 2018)The determination of correlation between thermal conductivity and structural parameters (porosity, permeability, humidity) of sedimentary rocks is a very urgent task. This article analyzes and compares the results of ...
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(2003)The Sturtian 'snowball' glaciation (730 Ma) is contemporary with the dislocation of the Rodinia supercontinent. This dislocation is heralded and accompanied by intense magmatic events, including the onset of large basaltic ...
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(1994)Continental flood basalt (CFB) provinces have been attributed to a variety of sources. Among these are: (1) ancient continental lithosphere (CL); (2) newly arrived plume heads from the core-mantle boundary; (3) steady-state ...
Now showing items 15645-15664 of 39126