Influence of inherited structural domains and their particular strain distributions on the Roer Valley graben evolution from inversion to extension

Abstract. The influence of strain distribution inheritance within fault systems on repeated reactivation is far less understood than the process itself. By evaluating cross sections through a new 3D geological model, we demonstrate contrasts in between different segments same system during its reverse and subsequent normal reactivation. study object Roer Valley graben (RVG), middle Mesozoic rift basin western Europe that bounded by large border systems. These were reversely reactivated under Late Cretaceous compression (inversion) as faults Cenozoic extension. A careful evaluation model RVG – Feldbiss (FFS) reveals presence two structural domains FFS with distinctly distributions both southern domain characterized narrow (<3 km) localized faulting, while northern wide (>10 distributed faulting. total throws estimated to be similar tectonic phases. This shows each accommodated amount compressional extensional deformation but persistently it differently. strike NW–SE, change geometry them takes place across oblique WNW–ESE striking Grote Brogel fault. Also other parts graben, WNW–ESE-striking are associated major geometrical changes (left-stepping patterns) system. At contact domains, NNE–SSW-striking latest Carboniferous strike-slip present, referred Gruitrode Lineament. Across another zone (Donderslag Lineament) nearby, populations also noted. observations inherited geometries well likely caused pre-existing lineaments basement.