PROTEROZOIC DEFORMATION STAGES OF THE UKRAINIAN SHIELD WESTERN PART: FAULT FORMATION, MAGMATISM AND EARTH’S CRUST DENSITY HETEROGENEITY

To clarify the chronological and spatial relationship between tectonic and magmatic activity in the Paleo- and Mesoproterozoic of the western part of the Ukrainian shield, the results of tectonophysical studies of the Sushchany-Perga, Zvizdal-Zalissya, Brusyliv fault zones and the Novohrad-Volynsk granitoid massif and the Korosten pluton are presented. Stages of tectonic-magmatic activity during which changes in the stress-strain state in space took place and magmatic complexes were formed are highlighted. According to the results of 3D gravity modeling, it was established that structural inhomogeneities are subject to two main systems of northeast and sublatitudinal faults.