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Browsing ELibrary by Title
Now showing items 4460-4479 of 21821
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(2002)Flow resistance of natural grasses, sedges and willows was studied in a laboratory flume. The objective was to investigate, how type, density and placement of vegetation, flow depth and velocity influence friction losses. ...
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(2004)The nature, thickness, and location of deposits from a particulate gravity current is strongly influenced by whether the flow is concentrated or dilute, whether it is laminar or turbulent, and whether it is supercritical ...
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(2002)Sedimentation of biogenic and abiogenic components was studied in cores NGC108 (36°36.85'N, 158°20.90'E; water depth 3390 m) and S2612 (32°19.84'N, 157°51.00'E; water depth of 2612 m) from the Shatsky Rise to understand ...
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(1988)In reconstructing the climate over long epochs, we make use of historial documents and of indirect indicators of climate, such as limnological indices (thickness and properties of annual sedimentary deposits), dendrologic ...
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(1997)A representative data base is used to elucidate the history of Devonian sedimentation in the Moscow basin of the Russian platform. The Devonian section includes six rhythms of sedimentation and seven principal geological ...
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(1989)The development of recrystallization microstructures has been studied in some ‘hot deformed’ peridotite xenoliths from the Thaba Putsoa Kimberlite pipe in S. Africa. The xenoliths were deformed to high strains by dislocation ...
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(2002)Hypotheses for the formation of many types of hydrothermal ore deposits often involve the direct contribution of magma-related fluids (e.g., Cu–Mo–Au porphyries) or their superimposition on barren hydrothermal cells (e.g., ...
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(2003)Fenites result from alkali metasomatism of granitoid rocks associated with the intrusion of silica-undersaturated alkaline magmas, and are characterized by addition of alkalis, iron and magnesium, albitization, nephelinization, ...
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(1993)The reactions Bt + Qtz = Opx + Kfs + H2O, Bt1 + Qtz + (K2O) = Or + Bt2 +(n H2O), Mg-Ts(Opx) + Otz + (K2O) = Or + En, Pl1 + (K2O) = Pl2 + Or + (Na2O) and Prg + En + Qtz + (K2O) = Or + Ed recorded in unique rock textures and ...
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(2002)Flow regimes of pore fluid were studied, with the steam-water phase transition near cooling intrusions of dikes and sills in a sedimentary basin taken into account. The study was based on a computer program simulating a ...
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(1996)The paper examines the formation of oil and gas in sedimentary basins. Three types of sedimentary basins are recognized: heterogeneous with a powerful ascending flow of hot fluids, high realization of hydrocarbon potential ...
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(2004)Significant sediment–ocean chemical fluxes are produced by the expulsion of sedimentary fluids at continental margins. Although such fluxes could play a role in global geochemical cycles, few quantitative estimates of their ...
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(2004)Beneath the brittle-ductile transition of the Earth's crust, the dilational deformation necessary to create fluid pathways requires fluid pressure that is near to rock confining pressure. Although the deformation may be ...
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(2001)Full characterisation of rough fracture surfaces and the resulting variable apertures is an important step in the drive towards an improved understanding of the factors which control fluid flow through rocks. A number of ...
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(1992)After a brief review of recent work on melt inclusions in diamond and in normal magmatic environments, the nature of the fluid-inclusion evidence for various stages of magmatic immiscibility is summarized.During magmatic ...
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(2001)The naturally occurring noble gas isotopes (40Ar, 36Ar, 84Kr and 129Xe) and halogens (Cl, Br, I) have been determined simultaneously in irradiated quartz vein samples by noble gas mass spectrometry. Quartz vein samples ...
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(2001)A procedure of fluid inclusion studies is proposed with emphasis on the criteria of selecting fluid inclusions for detailed (microthermometry and spectroscopic) analysis. An overview of descriptive and genetic classifications ...
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(2004)The widespread occurrence of epidote minerals in metamorphic and igneous rocks as well as in many ore deposit types makes it a promising candidate for fluid inclusion studies. Apart from high- to very high-temperature and ...
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(2001)The principal aim of this paper is to consider some of the special problems involved in the study of fluid inclusions in ore deposits and review the methodologies and tools developed to address these issues. The general ...
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(2001)Fluid inclusions in olivine and pyroxene in mantle-derived ultramafic xenoliths in volcanic rocks contain abundant CO2-rich fluid inclusions, as well as inclusions of silicate glass, solidified metal sulphide melt and ...
Now showing items 4460-4479 of 21821