Structural styles in thrust belts developed through rift basins: a view from the western Alps

摘要: Abstract In the external French Alps Mesozoic passive margin development on flanks of Tethyan Ocean resulted in repeated phases extension with formation faults and associated stratigraphic variations. Extensional are found great lateral extent throughout subalpine chains, often roughly parallel but antithetic orientations a dip either towards foreland or hinterland. Oligocene Miocene shortening area fold thrust geometries which show strong orientational relationship to original normal faults. These early structures related stratigraphy also control propensity for folding as opposed simple breaks. We review published structural sections from western Alps, together unpublished data French-Swiss border southwards illustrate style these stacked rift basins. This recognition interaction basin geometry thrusts is important modelling belt their geometric evolution. The styles this tectonic setting presents an opportunity improve our understanding hydrocarbon traps belts developed across For example, over-ridden fault blocks, reactivated against can provide new exploration plays, complexities may make elusive targets.