Metallogeny of deep lineaments and new global tectonics

The metallogenic role of loci of prolonged endogenous activity has been studied by the author. Examination of multistage magmatic complexes and ore deposits leads to the conclusion that their sources originated at great depths and that they were formed during the periods from tens up to hundreds of millions of years. The opinion is expressed that the fixed space position of such knots of prolonged endogenous activity is in contradiction with the principal ideas of New Global Tectonics.     

Study of Seismic Isolation by Full-Wave Numerical Modeling

Doklady Earth Sciences - Seismic isolation (isolation of the foundation) is one of the methods to increase the earthquake resistance of buildings. It is shown that full-wave numerical modeling can...     

Wave responses from oil reservoirs in the Arctic shelf zone

We consider the appearance of scattered PP-waves, SS-waves, scattered converted PS-waves, and SP-waves reflected from the reservoirs in the Arctic shelf zone and wave responses from them in the water column when the source and receiver are located near the water surface. We obtained a numerical solution of the direct problems of seismic prospecting in the shelf zone with a reservoir and without it. The solution was obtained using the grid-characteristic method, which makes possible to model the wave processes in detail.     

Numerical Simulation of Seismic Wave Propagation in Coastal Zones

Doklady Earth Sciences - The problem of tsunami warning and the use of the grid-characteristic method developed for studying wave processes in heterogeneous media is addressed. A multilayer...     

Modelling the wave phenomena in acoustic and elastic media with sharp variations of physical properties using the grid‐characteristic method

This paper introduces a novel method of modelling acoustic and elastic wave propagation in inhomogeneous media with sharp variations of physical properties based on the recently developed grid‐characteristic method which considers different types of waves generated in inhomogeneous linear‐elastic media (e.g., longitudinal, transverse, Stoneley, Rayleigh, scattered PP‐, SS‐waves, and converted PS‐ and SP‐waves). In the framework of this method, the problem of solving acoustic or elastic wave equations is reduced to the interpolation of the solutions, determined at earlier time, thus avoiding a direct solution of the large systems of linear equations required by the FD or FE methods. We apply the grid‐characteristic method to compare wave phenomena computed using the acoustic and elastic wave equations in geological medium containing a hydrocarbon reservoir or a fracture zone. The results of this study demonstrate that the developed algorithm can be used as an effective technique for modelling wave phenomena in the models containing hydrocarbon reservoir and/or the fracture zones, which are important targets of seismic exploration.