The border of the East-European Craton in south-eastern Poland based on gravity and magnetic data

Abstract

According to recent geological interpretations, the border of the East-European Craton (EEC) in SE Poland is located in the NE foreland of the Holy Cross Mts. Results of gravity and magnetic anomaly interpretations presented herein confirm this. According to 3D and 2D gravity and magnetic modelling, the EEC borders the SW flank of the regional crystalline feature with increased magnetic and density properties, which occur in the SE part of the Teisseyre–Tornquist Zone (TTZ). This flank rests near a deep fracture delimiting the TTZ on SW. The feature is a cause of the regional magnetic gradient observed there. Two SE–NW belts of residual gravity anomalies (dislocations) are also identified in the magnetic gradient zone, cutting Mesozoic and Palaeozoic formations. Results of geophysical and geological investigations show the importance of this dislocation zone and confirm that it occurs in all crustal complexes and the upper mantle.