Kinematics of large scale tip line folds from the High Atlas thrust belt, Morocco

The kinematics of several tip line folds situated along the South Atlas Front near Goulmima (Morocco) is established using both forward modelling and analysis of syn-folding deformation. From the Sahara foreland to the Atlas, the two successive major structures forming the mountain front in this area fit geometrically with a ‘generalised fault propagation fold’ model and a model of ‘fault propagation fold’ altered by late transport on the upper flat, respectively. Field evidence shows that the two folds are developed more or less synchronously. The analysis of minor structures helps address the question of migrating hinges vs fixed hinges during the fold’s growth.