ОСОБЛИВОСТІ ДИСЛОКАЦІЙ ТА ПОЛІВ ПАЛЕОНАПРУЖЕНЬ В ТУФАХ ТЕРЕСВИНСЬКОЇ СВІТИ ЗАКАРПАТСЬКОГО ПРОГИНУ В БАСЕЙНІ РІЧКИ ТЯЧЕВЕЦ

Abstract

Purpose. The main purpose of this paper was to study discontinuous and folded dislocations in the tuffs of the Teresvinsk bed of the Lower Neogene and to reconstruct of paleostress fields in the Tyachevets River basin of the Transcarpathian Trough. Methods. Structural-geological methods of field research and methods of tectonophysical field research are used in the work. Processing of field data was carried out with the construction of a structural-geological scheme of the research area. «Win-Tensor» software was used to process the data and to determine the paleostress fields. Results. Numerous folded and discontinuous dislocations, their interrelationships and paragenesis are found in tuff outcrops on the northern outskirts of Lazy village, Tyachiv District of, Zakarpattia («Chorna Voda» area). Tectonophysical studies of tectonic cracks and rupture faults were conducted. Were installed paleostress fields of different ages and kinematic types.The shear field is dominate among these fields and is the youngest in terms of age. The main region fault of the northwest-striking was studied. It has been established that this fault is a strike-slip fault. The second fault of the same direction cuts and displaces the northeast-trending synclinal fold. Scientific novelty. The age relationships of the systems of discontinuous and folded dislocations in the zone of influence of the large northwest-striking fault have been established for the first time. This fault formed and developed as a dextral strike.Several stages of activation of discontinuous structures and several types of different paleostress fields are established.The shear field of paleostresses predominates and has the youngest age Practical significance. It was established that numerous dislocations and their multi-stage activation over time contributed to the formation of hydrogen sulfide mineral waters, which are located in the zone of the main fault. The obtained research results clarify the history of the tectonic development of the Transcarpathian depression and indicate the presence of several stages of tectonic activations in the Neogene. Key words: tuffs, discontinuous dislocations, dextral shear, synclinal fold, paleostress.