MAPPING OF VOLCANIC STRUCTURES OF WESTERN-TRANSBAIKALIA PROMISING FOR THE SEARCH OF MINERAL DEPOSITS BASED ON THE ANALYSIS OF AEROMAGNETIC DATA

The method for analyzing the distribution of points with extreme values of the effective magnetization obtained as a result of solving the inverse problem using materials of high-precision aeromagnetic survey is presented. To study the structure of volcanic structures and make recommendations for their mapping, the processing of magnetic data was performed using the Baltika interpretation system. A feature of the algorithm for formalized calculation of the physical properties of the medium implemented in this system is the use of the gradient model. It is accepted that the physical properties of the model in the horizontal direction change according to a polynomial law, and in the vertical direction – in a piecewise linear manner. On the basis of the obtained distribution, points with extreme values of the effective magnetization and the corresponding equivalent regions were distinguished. The results of solving the inverse problem of magnetic potential, obtained for the Naran region, are presented. These data allow us to predict the features of the geological section formed by rocks with various magnetic properties and to map volcanic-dome structures.