Late to post-Variscan basement segmentation and differential exhumation along the SW Bohemian Massif, central Europe

Abstract. The exposed Variscan basement in central Europe is well-known for its complex structural and lithological architecture resulting from multiple deformation phases. We studied the southwestern margin of Bohemian Massif, which characterized by major long-lived shear zones, such as Pfahl Danube extending over > 100 km initiated during tectonics. integrated Bouguer gravity anomaly lidar topographic data analyses combined our results with available observations low-temperature thermochronology, metamorphic grades, granite inventory to detect patterns block segmentation differential exhumation. Three NW–SE-striking blocks are bordered Runding, Pfahl, zones northeast southwest. Basement boundaries indicated abrupt changes measured grades. By applying high-pass filters combination lineament analysis, we identified a new NNW–SSE-striking tectonic structure (Cham Fault), further segments known blocks. that segmented Cham Fault differ abundance spatial distribution late granites variations apparent thermochronological age data. Based on analyses, exhumation tilt model proposed explain juxtaposition different crustal levels. Block along Runding most likely occurred prior, during, after orogenic emplacement at ca. 320 ± 10 Ma, some cross-cut while others utilized these structures magma ascent emplacement. In contrast, activity fault sharply truncates inventory. Our study provides evidence intense continuous activities post-orogenic times highlights importance levels creation terrains.