PECULIARITIES OF SANDSTONE DISLOCATIONS IN THE AREA OF INFLUENCE OF GLUBOKOYARSK NORMAL FAULT ON THE FIELD OF THE MINE “CAPITAL”

Abstract

Purpose. Investigation of the conditions peculiarities of occurrence and rupture deformations of sandstones in outcrops along the right bank of the river Kazenny Torets in the field of the mine “Capital”. Methodology. In this work there were used: traditional structural-geological methods of field research; methods of field tectonophysical research; computer programs “Fabric-8” and “Win-Tensor” for processing field data, building of the stretch rose-diagrams of rupture deformations and reconstructing paleostress fields. Results. The conditions of occurrence of sandstones and their changes in space have been investigated. The systems of tectonic fractures, their mineral filling and influence on the material composition of the sedimentary rocks have been studied. Special tectonophysical studies have been carried out to determine the signs of paleostress fields of different kinematic types and ages.Reconstruction of paleostress fields was carried out using the elements of beding of cracks, grooves and slip lines on their slide mirrors. Several systems of rupture dislocations have been identified based on the results of studies in the hanging wing of the Glubokoyarsky fault. Systems of cracks have been identified, which facilitated the migration of deep-seated solutions with iron compounds. Such solutions changed the composition of sandstones in the wings of ruptured dislocations and formed zones of rock saturation with iron hydroxides up to 10 cm thick. Scientific novelty. For the first time in the outcrops on the day surface in sandstones of the hanging wing of the Glubokoyarsk fault, systems of tectonic fault dislocations of higher orders have been established. The repeated tectonic activation of the Glubokoyarsk normal fault in fields of paleostresses of different kinematic types has been established. The influence of ruptured dislocations on the formation of accumulations of iron hydroxides in rocks has been studied. Practical significance. The features of the conditions of occurrence of sandstones and the system of faulting dislocations in the hanging wing of the Glubokoyarsky fault have been established, which make it possible to predict the structural-geological, tectonic and tectonophysical conditions near fault dislocations, which is important for planning and carrying out mining operations in mine fields. Key words: sandstones, fault, tectonic cracks, iron hydroxides, reconstruction, paleostress field.