Geophysical processes and biosphere: article

Аnnotation: It has been established that numerous monogenic volcanic structures and outcrops of thermal waters of the Malko-Petropavlovskaya zone of transverse dislocations (Kamchatka) are localized in areas of increased fracturing of the upper part of the earthʼs crust, studied by geomorphological methods. At the quantitative level, the confinement of manifestations of volcanism and hydrothermal-magmatic systems to positive anomalies in the morphometric characteristics of the relief is characterized: the specific length of «weak» zones and watercourses, the density of river and lineament crossing nodes, and the dispersion of slope exposure. A high degree of consistency between the orientations of faults and «weak» zones was revealed: both rose diagrams show northwestern, meridional, and northeastern directions, and the average circular values of their strikes are 75 and 76°, respectively. According to the method of Yu.V. Nechaev, developed 3D-models of tectonic fragmentation of the Earth’s crust in the depth interval of 2.5–10 km based on the calculation of the specific lengths of «weak» zones and watercourses. The Pearson correlation coefficient between the point elements of these voxel models is 0.86. In general, the revealed relationship between morphometric characteristics and manifestations of volcanism made it possible to assume that the nature of fractures reflected in the relief is one of the main factors determining the hydrothermal-magmatic activity of the study area, which has a great impact on human economic activity.