Abstract
Compressional tectonic structures have been known from the Southern Hunsrück Borderzone since the end of the last century. In the western part of the borderzone the Saar-Nahe Syncline is upthrown, whereas in the eastern part the Hunsrück is upthrown against the Saar-Nahe Syncline. Folds with axes parallel and oblique to the 60° trending fault zone have been described in the past. In the area between Idar-Oberstein and Kirn, Permian lava sheets are displaced in such a way that their recent distribution can be explained by a right-lateral strike-slip movement of 5–8 km. The block of the Saar-Nahe Basin between the Southern Hunsrück Borderfault and the Saarbrücken Anticline has been tilted to the ENE since the Late Palaeozoic. The transcurrent movement can only be related to the opening of the Upper Rhine Graben. NE-SW and NNE-SSW trending folds in the Rotliegend sediments are considered to be transpression structures related to strike-slip movement in Early Tertiary times. Recent seismicity along the Southern Hunsrück Borderzone indicates that this zone is still active.
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