Palaeomagnetic age constraints on folding and faulting events in Devonian carbonates of the Kielce Fold Zone (southern Holy Cross Mountains, Central Poland)

Authors

  • Rafał Szaniawski Institute of Geophysics, Polish Academy of Science, Ks. Janusza 64, PL-01-452 Warszawa,
  • Andrzej Konon Institute of Geology, University of Warsaw, Żwirki i Wigury 93, PL-02-089 Warszawa
  • Jacek Grabowski Polish Geological Institute – National Research Institute, Rakowiecka 4, PL-00-975 Warszawa
  • Petr Schnabl Institute of Geology AS CR v.v.i., Rozvojova 269, 165 00 Praha 6

Keywords:

remagnetisations, palaeomagnetic components, fold tests, tectonics

Abstract

The results of numerous palaeomagnetic studies performed in the last three decades in Devonian carbonates of the Holy Cross Mountains (HCM) have documented the occurrence of several episodes of remagnetisation. This knowledge was applied in this study to determine the temporal relationships between the acquisition of particular secondary palaeomagnetic components and the formation of tectonic structures. This made it possible to estimate the timing of several episodes in the multistage tectonic evolution of particular folds and faults. We show that the westernmost part of the southern HCM was rotated clockwise after the early Permian. Detailed palaeomagnetic analysis documented also shape modifications in some map-scale and minor folds. This tectonic overprinting of originally Carboniferous folds postdated the early Permian. It was furthermore shown that the N–S trending dextral strike-slip faults studied were active between the early Permian and the Permo/Triassic. Our recent data show also the post-early Permian age of breccia that covers the deformed Devonian strata. 

Author Biography

Rafał Szaniawski, Institute of Geophysics, Polish Academy of Science, Ks. Janusza 64, PL-01-452 Warszawa,

IGF, PAN, Department of Magnetism, PhD

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Published

2011-11-03

Issue

Vol. 55 No. 3 (2011)

Section

Articles

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