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Browsing ELibrary by Title
Now showing items 8966-8985 of 21936
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(1987)An analysis is presented of periodic variations in the properties of the seismic wave field base on data obtained during systematic observations of shot-excited wafes in southern Tadzhikistan between 1980 and 1984. The ...
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(2004)The analysis of digital registering of microseismic background on the geophysical station MHV in 1978-2003 is presented. It is found that time variations of microseismic background are characterized by definite periodicity ...
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(2003)The heat capacity and entropy of elementary substances are considered in this work as a thermodynamic basis of geochemical systematics of the respective elements. According to the Oddo–Harkins rule, they are divided into ...
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(2004)The periodicity of climatic processes in the Barents Sea Region and along the Arctic Ocean coast during several hundred years has been studied by analyzing the tree-ring chronologies for the regions close to the northern ...
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(1989)The potassium-argon method, despite the scepticism it evokes among many geologists because of the many factors potentially capable of distorting the primary isotopic ratios, remains the method most useful in systematic ...
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(2000)Simulations with an atmospheric climate model of the Younger Dryas climate, a distinct cooling event around 12 kyr cal B.P., were compared with temperature reconstructions based on fossil plant data. In one experiment we ...
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(2001)The tidal deformation caused by the luni-solar potential includes not only a periodic part, but also a time-independent part, called the permanent tide. How to deal with the tidal correction in gravimetric observations, ...
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(2004)As a first step toward determining the mixing laws for the transport properties of rocks, we prepared binary mixtures of high- and low-permeability materials by isostatically hot-pressing mixtures of fine powders of calcite ...
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(2000)Fluid transport in the earth's crust is either extremely rapid, or extremely slow. Cracks, dikes and joints represent the former while tight crystalline rocks and impermeable fault gouge/seals represent the latter. In many ...
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(2001)The hydrothermal processes at ridge crests have been extensively studied during the last two decades. Nevertheless, the reasons why hydrothermal fields are only occasionally found along some ridge segments remain a matter ...
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(1996)Fragmentation, or the "coming apart" of magma during a plinian eruption, remains one of the least understood processes in volcanology, although assumptions about the timing and mechanisms of fragmentation are key parameters ...
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(2004)Bedding-parallel permeability of illite-rich shale of the Wilcox formation has been investigated using distilled water and 1 M solutions of NaCl, KCl, and CaCl2 as pore fluids. Despite low modal concentrations of swelling ...
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(2003)Permeability of the samples collected from the surface and from the depths of 8–11 km in the Kola SG-3 and from the depth of 3.8 in the KTB boreholes was studied at temperatures up to 600 °C and pressures up to 150 MPa. ...
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(2004)Permeability is often the limiting factor in clay-based barrier systems designed to attenuate miscible or immiscible contaminant transport. One critical aspect of barrier design is prediction of the effects of permeant ...
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(2002)The genus Acrostichides Fontaine is divided into two subgenera, Acrostichides and Lazaripteris, on the basis of material from the terminal Permian of Siberia. The subgenus Acrostichides comprises four groups of species. ...
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(2002)The main evolutionary trends in the Permian ammonoids are traced, and the systematics of this group is revised at the ordinal, family, and generic levels. All Permian species and their stratigraphie and geographic ranges ...
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(1993)Volcanic rocks of the Lower Permian Luchob Formation and sedimentary rocks of the presumed Upper Permian Hanaka and Middle-Upper Triassic Madighen formations were studied in three localities in the southwestern Tien Shan. ...
Now showing items 8966-8985 of 21936