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Now showing items 1179811817 of 39124

(2001)ESR dating has been widely applied for dating of corals of the age up to 500,000 to 600,000 years ago. Many studies have yielded promising results but the accurate determination of the equivalent dose (DE) remains a major ...

(2003)The microboudin method for palaeostress analysis is mathematically refined by incorporating the recently proposed shearlag model, which describes the relationship between stress distribution along a fibre embedded within ...

(2003)Electrochemical cells are reviewed and a new design is evaluated for potentiometric pH measurements to above 300 °C. The new design system minimizes the effects of metal corrosion on measured pH. In addition, a recently ...

(2002)Experiments with scaled, viscous pitch models demonstrate successive stages of growth (Stages I, II and III) of a ductile orogenic wedge with progressive deformation, which are kinematically as well as dynamically distinct ...

(1996)The Pliocene (7 Ma) Nbenriched arc basalts of the Valovayam Volcanic Field (VVF) in the northern segment of Kamchatka arc (Russia) host abundant xenoliths of spinel peridotites and pyroxenites. Textural and microstructural ...

(2003)This work generalizes international and Russian experience in the deep processing of complex refractory ores of precious metals, which provides end products competitive with respect to technological, economic, and ecological ...

(2002)Two species of the genus Prolagus, P. sorbinii Masini (Early Ruscinian) and P. bilobus Heller (Late Ruscinian), are determined from the Pliocene of Ukraine and Moldova for the first time. Prolagus fossils from the Upper ...

(2003)Onedimensional Maxwell's equations with relaxation are solved using the Laguerre time series. Space derivatives are obtained by difference approximation of the fourth order of accuracy. The equations reduce to a harmonic ...

(1989)The initial phase of tectonic stress wave propagation was analyzed earlier where its regional nature was emphasized. The data indicate that an anomalous compressive deformation lasting 3 years occurred simultaneously in ...

(2003)Field observations are tested against modal propagation theory to find the practical limitations upon derivation of layer permittivities and signal attenuation rates from a radar moveout profile over two‐layer ground. A ...

(1997)We present a method of calculation to simulate numerically the growth and propagation of shear cracks in an elastic medium. The problem is formulated in terms of integral equations written along the crack contour. These ...

(2004)The main purpose of the present paper is to present the mathematical expression for the frequencydependent effective acoustic properties of a liquid–bubble mixture. Effects of the bubble resonance, the heat and mass ...

(2004)Volcanic explosions generate pressure perturbations in the atmosphere and a seismic wavefield in the ground. The source is therefore well coupled with the atmosphere and the ground. The acoustic and elastic wavefields ...

(1987)The authors analyze the lateral time variation in longitudinalwave velocities in the crust of a seismically active region. This required data from longterm seismic observations with controlled wave generators in dense ...

(1996)Geochemical codes are used to identify the processes (speciation, solubility, and adsorption) controlling both natural water and waste leachate compositions. The uncertainties in geochemical calculations are important to ...

(2004)Nearreceiver material properties are required for the separation of the recorded wavefield into upgoing and downgoing P and S waves, and are also important for static timeshift corrections. However, it is difficult, ...

(2001)Capabilities of the polarisation method vertical sesmic profiliring – PM VSP and logging to prediction collectors properties of geological section in near borehole space are considered. Fracturedporous collectors with ...

(PANGAEA, 19871023)Fifteen iron oxide accumulations from the bottoms of two Finnish lakes ("lake ores") were found to contain as much as 50% Fe. Differential Xray powder diffraction and selective dissolution by oxalate showed that the samples ...

(1989)A kimberlite pipe found in Yakutia differs sharply in geologic structure from those studied earlier. Drillhole in kimberlitehosting marls of the Kyllakh formation penetrated bands and lenses of andraditegrossular skarn ...
Now showing items 1179811817 of 39124