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Browsing Геология России by Title
Now showing items 2815-2834 of 39195
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(2002)Azimuthal anisotropy in the upper mantle of many continental regions is documented by S-wave splitting measurements with SKS techniques. Here we present observations of splitting of the SKS seismic phase at seismograph ...
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(IOP Publishing, 2017)The problems of modern mining production include limitation of the scope of application of environmental and resource-saving technologies with application of consolidating pulps when developing the sites of the ore field ...
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(1989)We describe investigations of acoustic and electromagnetic emissions in rocks under pressure. Their combined use provides quantitative measures of the stress state of the rock body and makes it possible to study the ...
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(2004)We use a suite of spherical, thin sheet, finite element model calculations to investigate the pattern of horizontal tectonic deformation within Europe. The calculations incorporate the effects of Africa-Eurasia convergence, ...
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(1985)An attempt is made to obtain a combined geophysical model along two regional profiles: Black Sea— White Sea and Russian Platform—French Central Massif. The process of the model construction had the following stages: 1. The ...
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COMBINED IN SITU X-RAY DIFFRACTION AND RAMAN SPECTROSCOPY ON MAJORITIC GARNET INCLUSIONS IN DIAMONDS (2002)Mineral inclusions in Sao Luiz diamonds have been characterized using angle dispersive X-ray diffraction and Raman spectroscopy. We identified two different garnet phases coexisting with an omphacitic pyroxene. They represent ...
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(1999)The Sumozero-Kenozero greenstone belt in the SE Baltic Shield is ∼400 km long and up to 50 km wide and includes two main units with a total thickness of ∼5 km. The lower unit consists of oceanic plateau-type submarine ...
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(PANGAEA, 2013-07-23)We present an SiF4 separation line, coupled to a laser fluorination system, which allows for an efficient combined silica d18O and d30Si analysis (50 min per sample). The required sample weight of 1.5-2.0 mg allows for ...
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(2001)The recently fallen Kunya-Urgench H5 chondrite was studied in various aspects including natural and induced (X-ray and gamma-ray) thermoluminescence, tracks of VH nuclei, and cosmogenic radionuclides with different half-lives. ...
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(2003)We present the acquisition and processing of a multi-offset ultrasonic tomography experiment in which we aim to precisely reconstruct the image and kinematic properties of two scatterers that contrast strongly with the ...
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COMBINING KNOWLEDGE FROM DIVERSE SOURCES: AN ALTERNATIVE TO TRADITIONAL DATA INDEPENDENCE HYPOTHESES (2002)Consider the assessment of any unknown event A through its conditional probability P(A | B,C) given two data events B, C of different sources. Each event could involve many locations jointly, but the two data events are ...
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(PANGAEA, 2002-03-11)The patterns of spatial variation of diatom assemblages from surface sediments in Lake Lama were quantified using a combined approach of ordination and geostatistics. The aims were (i) to estimate the amount of variation ...
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(2002)Sedimentary deposits are often characterized by various distinct facies, with facies structure relating to the depositional and post-depositional environments. Permeability (k) varies within each facies, and mean values ...
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(2001)Chromite refers to the mineral (Mg, Fe) (Al, Cr, Fe)2O4in which the chromicoxide content varies typically between 15 and 65%; iron exists in both di andtrivalent states; minor compounds of significance are ...
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(2003)Whilst faulting in the shallow crust is inevitably associated with comminution of rocks, the mechanical properties of the comminuted granular materials themselves affect the slip behavior of faults. Therefore, the mechanical ...
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(2001)Overpressure build-up in compartments, and communication between overpressured compartments across faults are studied with simple analytical and numerical models. It is shown that the excess pressure in a (vertical) ...
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(2002)Intergranular pressure solution (IPS) is an important compaction and deformation mechanism in quartzose rocks, but the kinetics and rate-controlling process remain unclear. The aim of the present study is to test microphysical ...
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(2001)Most compaction models in the partially molten mantle have addressed the case of low intergranular melt concentrations (up to a few percent). Here we develop a mathematical and numerical formalism adapted to the two-dimensional ...
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(2002)A general formulation of compaction problems is described and the classification of these problems in accordance with boundary conditions is presented. A basically new class of compaction boundary problems in a finite ...
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(1998)Compaction driven fluid flow is inherently unstable such that an obstruction to upward fluid flow (i.e. a shock) may induce fluid-filled waves of porosity, propagated by dilational deformation due to an effective pressure ...
Now showing items 2815-2834 of 39195