The method of calculating the current velocity's verticla component in problems of fluid dynamics in reservoirs

A new algorithm for calculating the vertical velocity is suggested. Horizontal current velocity components are expressed through level inclination and wind/temperature forcing. The acquired relations are given in the difference form, with the accuracy being sufficiently high. The algorithm is tested using cases where a numerical solution is matched up with an exact one. The derived data are subsequently analysed. Translated by Vladimir A. Puchkin.     

Perspectives of phosphorite mineralization in Lower Paleozoic rocks of the Zilair synclinorium,Southern Urals

Data on the phosphorite mineralization, lithology, and variability of Lower Paleozoic rocks in the Zilair synclinorium and Yuryuzan basin are given. Comparison of Lower Paleozoic rocks with type sections of phosphate-bearing rocks in the world suggested their compliance with the phosphorite-enclosing rocks of the fine-grained phosphorite association. Analysis of the facies variability of rocks indicate the possibility of discovery of large phosphorite deposits in the Yuryuzan and Syuren subzones of the Western structural-facies zone. Phosphorite deposits are unknown in the synclinorium because of their instability during hypergenesis and burial under allochthonous loose sediments of the Cenozoic.     

Structural-Morphological Types and Localization Conditions of the Apocarbonate Talc Mineralization in the Beloretsk District of the Western Urals Province

Geology of Ore Deposits - The structural–morphological types and localization conditions of talc occurrences in the Beloretsk district of the Western Urals talc province are discussed. The...     

Structural elements of the sedimentary cover in the Deryugin Basin of the Sea of Okhotsk

A map of the tectonic zoning of the sedimentary cover in the Deryugin Basin area was constructed based on the structural data. For this purpose, a structural-tectonic map of the sedimentary cover was compiled using CDP seismic reflection and gravimetry data. Depending on the size, spatial position, and orientation, the structural elements of different orders were grouped into tectonic systems. The latters were subdivided into structural zones consisting of higher order structural elements in the form of relative rises and troughs. The corresponding maps and schemes are also presented in this paper.     

New data on the granulometric composition of sediments of the Anapa bay bar

The method and results of the study of granulometric composition of sediments of the Anapa bay bar are presented in this work. Along the extension, the Anapa bay bar hosts several areas with distinct granulomentric composition of sediments. The coastal variability of the bottom sediments is less expressive relative to land sediments and the pattern of the coastal distribution of granulometric composition reflects the local differences of hydrolithodynamic conditions of individual areas of the bay bar. These data are important for understanding the present-day lithodynamic processes and evolution of the geosystem of the Anapa bay bar.     

The effect of the Airy phase during the propagation of edge waves

Peculiarities of the edge wave evolution a great distance away from the source are considered. It is shown that waveguide dispersion may result in discrimination of the region in a wave train corresponding to the Airy phase. The effect of the discrimination of the Airy wave in the remote zone for the model of a step-like shelf is compared with real edge waves (using the marigrams of tsunami observed in the Sea of Japan in 1983).Translated by Mikhail M. Trufanov.     

Application of the data filtration algorithm in reconstructing the structure of trapped waves over the Crimean shelf

The data collected in the course of a local dynamic experiment near the Crimean shore during the summer of 1991 are interpreted, using the filtration algorithm based on variation principles. As a result, the ratio between the mode amplitudes of the long-shore velocity structure has been obtained, which is consistent with the physical views about shelf water dynamics. Translated by Vladimir A. Puchkin.     

Multilevel hydrothermodynamic model of a deep basin

A hydrothermodynamic model based on the traditional system of differential equations is discussed. The model uses conservative finite-difference schemes based on the methods of identifying the barotropic and baroclinic velocity components and on the complete inversion of the dynamic operator. Test computations for the Black Sea basin have been conducted.Translated by Vladimir A. Puchkin.     

Seasonal variability and the types of currents in the upper layer of the Black Sea

Spectral analysis of the climatic circulation in the upper 10 m layer of the Black Sea has been carried out. The current field was calculated from a three-dimensional baroclinic non-linear model. The mode composition of the circulation was derived. It is shown that the surface climatic circulation can be represented as the superposition of a finite number of elementary currents of two types:n- andm-modes. Only 4n-modes are shown to be energy-dominant throughout the year. A relation is established between the different sources of energy supply of currents and the modes which assimilate this energy. Problems concerning the nature of the classical Black Sea currents such as the main Black Sea current (MBSC) and the Knipovich spectacles are discussed. A scenario of the field large-scale experiment is suggested which allows the reconstruction of the amplitudes of the first 10n- and the first 10m-modes from mooring data.Translated by Mikhail M. Trufanov.