ОСОБЛИВОСТІ УМОВ ЗАЛЯГАННЯ ТА ФОРМУВАННЯ ДЕФОРМАЦІЙНИХ МЕЗОСТРУКТУР НА ДІЛЯНЦІ СЕЛИЩА КОБИЛЕЦЬКА ПОЛЯНА (МАРМАРОСЬКИЙ МАСИВ СХІДНИХ КАРПАТ)

Abstract

Purpose. The aim of the work was to establish the peculiarities of the conditions of occurrence and formation of deformation discontinuous mesostructures on the basis of field geological-structural and tectonophysical studies and microstructural analysis of rock samples. Methodology. The following are used in the work: traditional field geological and structural methods; methods of field tectonophysical research; computer programs «Fabric-8» and «Win-Tensor» for field data processing, construction of roses-diagrams of elements of discontinuous dislocations and reconstruction of paleostress field, mineralogical-petrographic and microstructural methods for studying the composition of rocks and microdeformations in sections. Results. According to the results of research, the systems of discontinuous deformation mesostructures and their correlation with regional discontinuous faults are established. The analysis of tectonic movements and their kinematic types is carried out, reconstruction of fields of paleonstresses is executed and features of changes of their types in different age deposits are established. The forms of manifestations of discontinuous dislocations at the micro level in sections are established. Scientific novelty. Several systems of discontinuous dislocation mesostructures have been established, which correspond to the main systems of regional discontinuous faults. Changes of their kinematic type in time are established for the same systems of discontinuous dislocations. Dislocations of the landslide type are a characteristic feature of the youngest sediments of the study area. Significant changes in the characteristics of paleostress fields on the research area have been established. Practical significance. The established peculiarities of the conditions of occurrence and evolution of discontinuous mesostructures in time allow to clarify the history of formation of the Marmorosh massif. It is established that the areas of intersection of discontinuous dislocations of different systems are the most promising for iron ore. Such areas are characterized by multistage in the development of discontinuous dislocations in time and abrupt changes in the kinematic types of paleostress fields. Key words: shales, limestones, sandstones, discontinuous deformations, landslides, mesostructures, paleostress field.