ASGP (2002), vol. 72: 89-98

GEOMETRIC ANALYSIS OF STEEP-DIPPING DISLOCATIONS WITHIN THE GRANITOID CORE IN THE POLISH PARTOF THE TATRA MTS.

Edyta JUREWICZ

Institute of Geology, University of Warsaw, Al. Żwirki i Wigury 93, 02-081 Warszawa

Jurewicz, E., 2002. Geometric analysis of steep-dipping dislocations within the granitoid core in the Polish part of the Tatra Mts. Annales Societatis Geologorum Poloniae, 72: 89-98.

Abstract: The paper is focused on steep dipping dislocations within the granitoid core of the Polish part of the Tatra Mts. Two groups of dislocations were distinguished: single faults with flat and smooth planes, and mylonitic and cataclastic zones. With the help of TectonicsFP software, the reconstruction of the stress pattern, responsible for the formation of single faults, is presented basing on slip structures on their planes. The structures can be linked with the Middle Miocene (Sarmatian) 106-120° extension; in effect a set of normal oblique-slip, ~35/60N faults was formed with a horizontal sinistral component. The geometry of the system of mylonitic and cataclastic zones should be analysed after reversing them to positions prior to the post-Palaeogene rotational upheaval of the Tatra Mts. The orientation of some dislocation zones, described in literature, is revised.