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Browsing ELibrary by Title
Now showing items 5460-5479 of 21821
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(2004)SummaryIntraplate 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 ...
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(2001)Fluids in the earth's crust are commonly transported by hydrofractures, such as dykes and mineral veins, many of which become arrested at various crustal depths. Hydrofractures are commonly arrested - some showing blunt ...
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(2003)Do Archean ages obtained for diamonds from many of the world’s cratons constitute a strong constraint on the thermal state of the Archean continental lithosphere? The apparent longevity of diamonds obtained from cratonic ...
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(2004)In order to investigate imaging properties of various magnetotelluric interpretation parameters over complicated models, we carried out numerical model calculations, where the models contained a 3D near-surface (“shallow”) ...
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(2001)Chironomid-inferred temperature reconstruction has been shown to be accurate but the method is tenuous and time consuming. With the increased importance of high-resolution studies, more samples should be analysed, increasing ...
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(1999)The objective of this paper is to quantitatively assess the role of mantle plumes in transporting heat to the base of the lithosphere. We first review the mechanisms responsible for mantle heat flow. We take the total ...
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(1996)Mineral formation or dissolution is exploited by microbes if it favors their survival. Some microbes are able to dissolve a mineral by using it: (1) as a source of energy, (2) as a terminal electron acceptor in respiration, ...
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(2003)Geological sediments tend to strengthen during progressive burial but the interplay of porosity and permeability, strain and effective stress gives rise to numerous circumstances in which the strength increase can be ...
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(2003)In a series of thermomechanical models of the lithosphere, applied to the determination of apparent elastic thickness, extension, and collision and exhumation, Burov and coworkers model the ductile behaviour of the upper ...
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(2002)The impact-induced release of CO2 is one of the potentially most important mechanisms to explain drastic and rapid changes of the climate at the Cretaceous-Tertiary (K-T) boundary. General predictions, modeling, and ...
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(2005)The Earth's lithosphere can focus basaltic magmatism along pre-existing weakness zones or discontinuities. However, apart from the influence on the geochemistry of magmas emplaced in subduction tectonic settings (mantle ...
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(2002)Laboratory experiments were performed to study the influence of density and viscosity layering on the formation and stability of plumes. Viscosity ratios ranged from 0.1 to 6400 for buoyancy ratios between 0.3 and 20, and ...
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(2001)It is difficult to assign the animal-like body fossils of the late Neoproterozoic to crown metazoan phyla. Many Neoproterozoic fossils appear to share an architectural theme, which was characterized by Seilacher (1984, ...
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(2003)Criteria that are deemed critical for recognition of terrestrial impact craters include features from hand specimens such as shock metamorphic structures. Although these criteria have been selected because they are unique ...
Now showing items 5460-5479 of 21821