The inner set of reverse faults defines a zone of greater uplift. The structural evolution is characterised by an initial development of the bounding faults, while later deformation is focused in the central, more-uplifted part of the model. The change in asymmetry occurs where the dominant sidewall thrust system switches across the central part of the 'pop-up'. 3 - Depth colour map of the deformed top surface. Light blue contour lines have an interval of two mm.
Red colours shows structural highs while blue colours structural lows.
In order to simulate the deformation observed in the analogue model, a forward modelling approach was undertaken using the present day fault configuration in the 3D structural restoration package. FPF is a kinematic restoration tool based on particulate laminar flow over a fault ramp, the algorithm is derived from continuing work by Egan et al. The fault plane is divided into discrete dip domains where a change in the fault dip is marked by a dip bisector. Flow lines are constructed by connecting points of equal distance from the fault plane on all dip bisectors. 4 - Cross section illustrating the relationships between fault geometry, fault dip bisectors and hangingwall flow lines in the Fault Parallel Flow Algorithm.