Fig. 8

Simplified tectonic map of the Alps based on Pleuger et. al. (2012), complemented with recent data. In addition to references listed in Pleuger et. al. (2012), fissure monazite age data (Bergemann et al. 2017, 2018, 2019, 2020; Berger et al., 2013; Gasquet et al., 2010; Gnos et al., 2015; Grand’Homme et al. 2016a; Janots et al., 2012; Ricchi et al., 2019, 2020a, 2020b) and data from Schönborn (1992) were considered. Using the present tectonic constellation, the drawings show schematically Cenozoic faults active at 32 Ma, 21 Ma, 17 Ma, 12 Ma and 9 Ma. During Alpine collision, frontal faulting shifted progressively to more external parts, but fault and thrust reactivation occurred also in internal parts. The oldest monazites dated in association with strike-slip faulting derive from the exhumed high-pressure units of the Western Alps and the Argentera Massif. Fissure monazites recording < 12 Ma fault activity are mainly found in the Central and Western Tauern Window (Ricchi et al., 2020a), the northern, western and southern limits of the Lepontine dome (Bergemann et al., 2020), and in all the external massifs, except Argentera (e.g., Bergemann et al., 2019; Ricchi et al., 2020b; Fig. 4). Many of the faults active at 9 Ma are still active today