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Browsing ELibrary by Title
Now showing items 5481-5500 of 21936
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(2003)This paper presents a general study of horizontal well hydraulics for three aquifer types: a leaky confined aquifer, a leaky water table aquifer, and a leaky aquifer under a water reservoir. Semi-analytical solutions are ...
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(2002)The well-preserved Kärdla impact crater, on Hiiumaa Island, Estonia, is a 4 km diameter structure formed in a shallow Ordovician sea ˜~455 Ma ago into a target composed of thin (˜~150 m) unconsolidated sedimentary layer ...
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(2004)Hornblende gabbroids, which are widespread in the Urals, are products of hydrous basic magmatism, mainly subduction-related. Two groups of these rocks are recognized: (1) pre-Middle Devonian (older than 390 Ma) gabbroic ...
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(1999)Andesitic arcs are sited over convergent lithospheric plate junctions. Aqueous fluids driven off the downgoing slab are responsible for partial fusion of the warming subducted plate and/or the overlying mantle wedge, and ...
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(2000)Calibrations are presented for an independent set of four equilibria between end-members of garnet, hornblende, plagioclase and quartz. Thermodynamic data from a large internally-consistent thermodynamic dataset are used ...
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(2003)New taxa of tabanids and athericids are described from the Lower Cretaceous deposits of England and Transbaikalia. The relationships of new genera to the Recent Athericidae and Recent and fossil Rhagionidae are discussed. ...
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(2001)Horst-accretionary systems (HAS) extended to the northeast and alternating with rift-grabens (RG) were established within the bounds of the southeastern margin of Asia. The synchronous formation of these positive and ...
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(2006)Zircon populations of Neoproterozoic and early Paleozoic age occur in metabasites of a high-pressure amphibolite-facies unit of the Austroalpine basement south of the Tauern Window. The host rocks for these zircons are ...
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(2001)Dialysis of humic organic matter separates the material into molecular weight fractions or, more correctly, fractions which can pass through specifically sized pores. In the course of investigating the structure of humic ...
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(2003)Zircon saturation temperatures (TZr) calculated from bulk-rock compositions provide minimum estimates of temperature if the magma was undersaturated, but maxima if it was saturated. For plutons with abundant inherited ...
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(1998)The peculiarities of the interaction of chemically active alkaline-fluid plume components with major minerals of the lithosphere (the situation of hot spots of mantle) were experimentally studied at a pressure as high as ...
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(2004)Intraplate tectono-magmatic phenomena, including the emplacement of layered intrusions, and the giant dyke swarms, anorogenic (hotspot) volcanism, oceanic plataeux, rifting processes, basin formation, and geomorphological ...
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(2002)The heat flux at the core-mantle boundary (CMB) is a key parameter for core dynamics since it controls its cooling. However, it is poorly known and estimates range from 2 TW to 10 TW. The lowest bound comes from estimates ...
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HOW CR3+ AND FE3+ AFFECT MG-AL ORDER-DISORDER TRANSFORMATION AT HIGH TEMPERATURE IN NATURAL SPINELS (2003)Three natural Mg(Al2-yCry)O4 spinels (y 0.07–0.16), highly ordered in terms of Mg–Al, and one Mg(Al2–yFe3+y)O4 spinel (y0.08), highly ordered also in terms of Fe3+, were studied by means of X-ray single-crystal diffraction. ...
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(2003)The fracture of a shear fault containing several unbroken asperities in a granitic porphyry is examined in detail via acoustic emission (AE) data collected by a high-speed multi-channel waveform recording system. The ...
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(2004)In some bituminous coals, typically of high-volatile bituminous rank, certain lithophile trace elements (e.g. Ti, V, Cr, Zr, etc.) often have surprisingly high organic affinities, defined as the fraction of the element ...
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(2005)Coupled CaCO3 dissolution-otavite (CdCO3) precipitation experiments have been performed to 1) quantify the effect of mineral coatings on dissolution rates, and 2) to explore the possible application of this coupled process ...
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(2002)The temperature gradient in the lower mantle is fundamental in prescribing many transport properties, such as the viscosity, thermal conductivity and electrical conductivity. The adiabatic temperature gradient is commonly ...
Now showing items 5481-5500 of 21936