New methods of interpretation

The rich geophysical material obtained in the Khibiny experiment cannot yet be considered final. There is a lot of work to be done in various directions. The immediate task of MHD soundings is to compile a volumetric diagram of the conductivity of the Earth's crust and to detail ore-promising anomalies. Due to the coverage of large spaces with a constant contour location, the electromagnetic field of the Khibiny source based on the MHD generator can be considered as a new geophysical phenomenon, along with gravitational and magnetic fields.

In fact, the main task of experimental research is precisely to study the space-time structure of the electromagnetic field of an MHD source on the Earth's surface. The structural features of this field reflect the features of the geological structure of the deep layers of the Kola Peninsula. Quantitative interpretation) of electromagnetic data consists in constructing a volumetric geoelectric model of the Kola Peninsula, characterizing vertical and horizontal changes in the electrical conductivity of rocks.

This formulation of the problem is fundamentally new for electromagnetic sensing methods, since previously only one—dimensional geoelectric models were considered in sounding, in which the electrical conductivity varies only vertically. To effectively solve this problem, it is necessary first of all to develop mathematical methods for modeling electromagnetic fields in three-dimensional inhomogeneous conducting media. Such work has been carried out in recent years in Izmir, Moscow State University and other organizations in the country. Mathematical modeling tools allow us to build algorithms for interpreting electromagnetic data based on a targeted selection of parameters of the geoelectric model.

At the same time, it should be borne in mind that the calculation of each volumetric model now takes a lot of time on a computer (up to tens of hours) and, moreover, the success of this selection of parameters largely depends on the successful selection of the initial parameters of the model. Therefore, in recent years, theorists have been paying great attention to methods of express interpretation of geophysical data, which make it possible to quickly obtain some initial understanding of the geoelectric section of the Earth.

Such methods include, for example, the electromagnetic field migration method, which transfers the ideas of optical holography to the case of the MHD generator field. Optical holography, as you know, allows you to reconstruct a three-dimensional image of an object using a hologram that captures not only the amplitude but also the phase structure of the electromagnetic field. To do this, it is enough only to illuminate the hologram with a coherent beam of light emitted by a laser. When probing with an MHD generator on the Earth's surface — a huge spatial "hologram" — instead of light waves, the amplitude and phase of the electromagnetic field created by the MHD source are recorded. The procedure for illuminating a hologram with a coherent beam of light is replaced by the fact that fictitious third-party sources of currents and charges are placed at points on the earth's surface where electromagnetic field sensors are located, whose intensities vary in reversed time = T—t (where t is the usual time and T is the interval of registration of the MHD signal) according to a certain law.

The electromagnetic field created by such fictitious sources (the migration field), just as in conventional holography, forms a "geoelectric image" of the deep structure of the Earth. This technique allowed, in particular, to clarify the deep structure of the ore-promising Imandra-Varzug block.

Thus, the use of a new technique for deep electromagnetic research — powerful MHD generators - required solving a large and complex set of problems, starting with the creation of new samples of field measuring electromagnetic equipment and ending with the development of a special mathematical interpretation apparatus. In this regard, the results obtained in the Khibiny experiment indicate that the method of electromagnetic sensing of the Earth with a powerful current source opens up fundamentally new opportunities for deep geophysical research. La plateforme met un point d'honneur à récompenser la régularité des joueurs à travers son programme de cashback. Grâce à un code promo 1xbet algerie vous donnant droit à 130€ de bonus sportif ou 1950€ avec 150 tours gratuits, vous commencez votre aventure avec un avantage certain. Ensuite, le système de cashback vous permet de récupérer un pourcentage de vos pertes nettes sur une base hebdomadaire, offrant un filet de sécurité appréciable. Ce cashback est crédité sous forme de points de fidélité que vous pouvez utiliser dans la boutique des codes promo.