Internal structure and kinematics of the Zvenyhorod-Brats’k fault zone of the Ukrainian shield according to geophysical data

Complex geomagnetic and tectonophysical studies were performed in order to characterize detail the heterogeneity of Earth’s crust Zvenyhorod-Bratskfault zone clarify its internal structure kinematics. Based on results magnetometric studies, maps different wavelength components magnetic anomalies obtained, sources which are associated with layers crust; magnetization upper, middle lower parts was estimated; 2D 3D models individual structures areas developed; geological tectonic interpretations performed.
 The is clearly manifested regional component field, separating maxima minima zones, also reflected by linear bands short-wavelength upper part crustal section. At same time, it separates fundamentally types their values: west, GSZ characterized significant (up 3—6 A/m) contrast oval-shaped Ingul block up 1 A/m m.
 Tectonophysical measurements structural textural elements rocks carried out at four sites along rivers Velyka Vys’, Kilten’, Suhyi Tashlyk Mertvovid. Processing interpretation field done structural-paragenetic method tectonophysics for III-IV depth levels using Stereonet program.
 It established that formed ≤2.45 billion years ago consists rectilinear shear zones related stages fault formation. However, main factor formation Pervomaisk stage, during L-shears a strike azimuth 345° R-shears 357° formed. presence Archean phases can testify earlier relative Pervomaysk one.
 Proterozoic cycle activation (~2.1—1.70 ago) contributed deposits ore manifestations minerals within Zvenyhorod-Bratskfaults zone.