Pešková I., Hók J., Štepančíková P., Stemberk J. & Vojtko R., 2010: Results of stress analysis inferred from fault slip data along the Sudetic Marginal Fault (NE part of Bohemian Massif). Acta Geologica Slovaca, 2, 1, 11–16.

Results of stress analysis inferred from fault slip data along the Sudetic Marginal Fault (NE part of Bohemian Massif)

Výsledky napäťovej analýzy z oblasti Sudetského zlomu (SV časť Českého Masívu)

Ivana Pešková^1,2, Jozef Hók¹, Petra Štěpančíková³, Josef Stemberk³ & Rastislav Vojtko¹

¹Department of Geology and Palaeontology, Faculty of Natural Sciences, Comenius University, Mlynská dolina G, 842 15 Bratislava, Slovakia; hok@fns.uniba.sk; vojtko@fns.uniba.sk
²Dionýz Štúr Institute of Geology, Department of Pretertiary formations, Mlynská dolina 1, 817 04, Bratislava; ivana.peskova@geology.sk
³Department of Engineering Geology and Geofactors, Institute of Rock Structure and Mechanics, Academy of Sciences, V Holešovičkách 41, 182 09 Praha 8, Czech Republic; stepancikova@irsm.cas.cz; stemberk@irsm.cas.cz

Abstract

The Sudetic Marginal Fault (SMF) separates the Fore-Sudetic block on the NE and the Sudetic block on the SW of Bohemian Massif. The fault slip data along the SMF yielded two different subhorizontal orientations of the maximum stress axes. The NE–SW oriented compression was computed in the Fore-Sudetic block, while the NNW–SSE compression is recorded in the Sudetic block. The faults are predominantly oriented in the NE–SW as well as in NW–SE direction. The dextral and sinistral sense of movement was depicted. The stress fields have operated most probably since Miocene to present day. The SMF most probably represents a barrier between the two different tectonic stress regimes.

Key words: Bohemian Massif, Fore-Sudetic block, Sudetic block, Sudetic Marginal Fault, structural geology, fault-slip data, stress analysis

Manuscript received: 2010-02-22

Revised version accepted: 2010-03-15