Geodynamics of SW-Pannonian inselbergs (Mecsek and Villány Mts, SW Hungary): Inferences from a complex structural analysis

Three independent methods: paleomagnetic investigation, analysis of reflection seismic sections and structural study of outcrops have been applied to Mesozoic-Tertiary rocks of the Mecsek and Villny Mts (SW Hungary), which form inselbergs in the southern part of the Pannonian Basin. The structural history is marked by Late Oligocene-Early Miocene NW-SE shortening (in present cooridinates); late Early Miocene N-S shortening together with important clockwise rotations of the whole area and local counterclockwise rotations in E-W left lateral wrench corridors; smaller N-S shortening with local wrenching and positive inversion during the Middle Miocene; an important N-S shortening creating large folds and thrust reactivation in Late Miocene; a transtension characterised by roughly WNW-ESE elongation directions, creating left lateral oblique faulting along NE-SW oriented fault segments in Late Miocene; an important NW-SE shortening from latest Miocene to Present. This latter reactivated E-W structures as right lateral transpressive wedges and generated locally important rotations along them.