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Browsing ELibrary by Title
Now showing items 13623-13642 of 21934
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(2003)Uncertain soil properties are often modeled as random fields. This renders the unsaturated flow equations stochastic. Determining statistics of pressure head statistics, ψ, is nontrivial, since the Richards equation is ...
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(2003)An explicit, essentially 2D solution for steady unsaturated seepage flow from infinity to a corner, with boundaries kept at constant suction, is obtained for the Kirchhoff potential by the method of separation of variables. ...
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(1989)The question as to the origin of iron-manganese nodules, which are currently the principal type of solid mineral that could be mined in the ocean (with a total reserve of about 1012 tons, has both geological-geochemical ...
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(2003)The paper presents an analytical and numerical study of two perfectly matched layer (PML) formulations for the shallow water equations in terms of the unsplit physical variables. A perturbation method followed by a change ...
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(2004)A sediment core from Lake Pichozero (61°46'; N, 37°25'; E 118m a.s.l.) provides information on the environmental and climatic conditions in southeastern Russian Karelia during the Lateglacial and early Holocene (12 800-9300 ...
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(2002)In areas that are occasionally inundated by floods, it is essential to know the quantity and density of vegetation that can be allowed while avoiding flooding beyond the intended floodplains. An unsteady flow model was ...
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(1990)In modeling any process, we desire to select the experimental data that give the best representation of the original. There have been many theories explaining the thermal conditions in the lithosphere on plates undergoing ...
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(2001)A unique distribution of four homologous series of monomethylalkanes (MMAs) ranging from C23 to C31+ in the extractable organic matter and the hydrous pyrolysate of Permian torbanites has been observed for the first time. ...
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(1988)We found about 50 gold grains in the heavy fraction obtained by dissolving large-volume samples of serpentinized and carbonatized kimberlite from the Mir pipe. Many of them were full of inclusions of other phases. These ...
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(1990)Researchers have found the microfossils of the genus Obruchevella Reitlinger, 1948 to be an extremely interesting group of very old microorganisms. Because of their characteristic helical structure, they are easy to identify ...
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UNUSUAL ROCKS AND MINERALISATION IN A NEW CARBONATITE COMPLEX AT KANDAGUBA, KOLA PENINSULA, RUSSIA (2001)The paper presents the results from a reconnaissance investigation of carbonatites in a newly discovered alkaline complex in the Kola peninsula, Russia. The Kandaguba complex differs from other carbonatite plutons of the ...
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(2001)The formation of traces of a magnetic phase with a Curie point of 470–475 °C is detected during routine thermomagnetic analysis of various haematite types without significant isomorphous substitution. Using heating and ...
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(2002)The discovery of crude oils and condensates at ever higher temperatures casts doubt on the validity of the usual geochemical modelling approach, that uses empirical reactions and rate constants. The solution used to account ...
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(2002)Vertical tectonic movements often change the structural style and physico-chemical habitat of sedimentary basins. Changes in pressure, temperature and salinity of the groundwater caused by tectonic uplift may result in the ...
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(2002)A new Late Cambrian trilobite–brachiopod fauna from the Kurchavinskaya Formation, Severnaya Zemlya, northern Siberia, allows correlation of the Ketyi Horizon of the NW Siberian succession with the praecursor Zone of the ...
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(1998)This paper presents a new detailed ammonite-based biostratigraphic zonation of the Upper Cretaceous in eastern Central Asia and substantially refines the previous scales. Two units were established in the lower Cenomanian: ...
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(2002)The Upper Cretaceous sequence in the east of the Lesser Caucasus, within the Azerbaijan territory, begins with the Cenomanian terrigenous sediments that are overlain with a hiatus by thick volcanogenic-terrigenous deposits ...
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(1994)Maastrichtian tuffaceous sandstones and siltstones were sampled from four sites in the northern part of Shikotan Island in the Lesser Kuril Islands. A characteristic component (ChRM) isolated from most samples passes the ...
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(2003)Time-stratigraphic patterns of stable carbon isotopic ratios recorded in terrestrial organic matter from Cenomanian-Maastrichtian successions for the Russian Far East can be correlated to those of carbonate carbon from ...
Now showing items 13623-13642 of 21934