Geophysical processes and biosphere: article

Аnnotation: The results of computer interpretation of the LANDSAT satellite image of the natural-technogenic geosystem – the Degelen area of the Semipalatinsk test site are presented in the article. The obtained data are analyzed together with the materials of geological mapping of the study area and infor-mation of the underground large-scale explosions. The block-hierarchical divisibility of the rock mass is reflected in the lineament pattern. The extended lineaments identified at the highest thresh-old of expression are fragmentarily confirmed by faults and are considered as boundaries which de-terminate of the block configuration. High values of the density fields of small lineaments of the sublatitudinal and SW–NE directions relative to the density field of the SE-NW direction correspond to the activation of the region at the neotectonic stage. A lineament zone of SW–NE strike traces the main deep Degelen–Irtysh fault. The SW–NE direction of the elongation lines of the rose diagrams of small lineaments is determined by the modern stress field. A comprehensive analysis of the geological and geomorphological structure, statistical characteristics of the fields of small linea-ments and technogenic impact on the massif was used to rank the blocks into natural and natural-technogenic ones. The technogenically disturbed areas are identified according to the anomalies in the density of small lineaments, which can be considered as the main ways of radionuclides migra-tion with underground water