Multiple remagnetizations in the Devonian carbonates in the northwestern part of the Kielce region (Holy Cross Mts., southern part)

Abstract

Givetian dolomites from Laskowa and Frasnian limestones from Kostomłoty (NW part of the Kielce region, Holy Cross Mts., southern part) were the subject of palaeomagnetic study. Post-folding age of characteristic remanent magnetization was confirmed at Kostomłoty and two new Late Carboniferous and Early Permian components were revealed that had not been described in the previous palaeomagnetic studies. The two components of magnetization in Laskowa dolomites are also most probably (fold test has not been applied) of Late Carboniferous-Early Permian age. Their acquisition was slightly shifted in time in relation to those of Kostomłoty limestones. The age of remagnetization is estimated as 315-275±10 Ma. Thermoviscous burial magnetization can not be unambiguously identified. A link between multicomponent remagnetization and Late Variscan ore mineralization is tentatively suggested. All palaeomagnetic poles from the investigated area are matched with the reference European apparent polar wander path after 13 ± 4.6° counter-clockwise intra-block rotation. This implies that the area was affected by Early Permian or later tectonic movements which modified the direction of the Late Carboniferous fold structures.