DBPapers
DOI: 10.5593/SGEM2015/B11/S1.007

BASE CHARACTERISTICS AND RELEVANCE OF E – W DIRECTION DISJUNCTIVE TECTONIC IN THE EAST PART OF SLOVAK KARST

M.Zacharov, S. Lukacinova
Tuesday 4 August 2015 by Libadmin2015

References:15th International Multidisciplinary Scientific GeoConference SGEM 2015, www.sgem.org, SGEM2015 Conference Proceedings, ISBN 978-619-7105-31-5 / ISSN 1314-2704, June 18-24, 2015, Book1 Vol. 1, 53-60 pp

ABSTRACT
During endokarst research in eastern part of Slovak Karst in Slovak republic we were also concerned with study of conditions of endokarst formation and development based on character of disjunctive tectonics. Research of endokarst was realized mainly in Silicicum unit (Silica nappe). Silicicum unit is the most extensive unit and also most important unit for formation and evolution of karst. Research showed that faulted structures represent large polygenetic association. Following groups of faults were selected by orientation analyze: a) faults of NW – SE direction, b) faults of E – W direction, c) faults of N – S direction, d) faults of NE – SW direction. In term of formation and development of endokarst (cave systems long hundreds to thousands - 102 to 103 m) the fault group of E – W direction is the most important. It is important group of faults with the azimuthal dispersion of ± 20º from basic direction and with undulated fault surface with dip to N and also to S. The faults are accompanied with zones of tectonic breccias with thickness 0,3 – 3,0 m. Two genetic types were determined in this group of faults. Faults of first genetic type are right and left oblique slip faults and faults of second type are sinistral and dextral strike-slip faults. Predominant type of E – W faults is normal fault with decimetre breccias zones. Just these disjunctive structures have fundamental influence in processes of formation and development of endokarst. It is likely that the mentioned structures (E – W faults) were caused by process of after-thrust back drop of Silica nappe blocks as a result of releasing of compression that caused transfer of Silicicum unit on the units more remote.

Keywords: Slovak Karst, disjunctive tectonics, faults of E – W directions, endokarst

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