Recent and active tectonics of the external zone of the Northern Apennines (Italy)

摘要: We present a comprehensive study of the recent and active tectonics external part Northern Apennines (Italy) by using morphotectonic, geological–structural, stratigraphic analysis, compared with current seismicity region. This analysis suggests that is characterised presence three major systems Quaternary compressive structures corresponding to (1) Apenninic watershed, (2) Apennines–Po Plain margin (pede-Apenninic thrust front), (3) Emilia, Ferrara, Adriatic Fold buried below Po Plain. Geological data interpreted seismic sections indicate roughly N–S deformation direction, rates <2.5 mm/year. The shortening decreased since Pliocene, when our compression in NNW–SSE direction up 7 trend kinematics affecting subsoil fit well pattern area, as GPS geodetic levelling data, pointing activity these controlled an overall stress field. Close earthquake focal mechanisms shallow extension associated deep compression. extensional events may be related secondary field developing on hangingwall system watershed; alternatively, this have been recently deactivated overprinted normal faulting. Deeper are both basement connects at surface pede-Apenninic front Moho structure.