Fault-Propagation Folding in Salt-Influenced Extensional Basins Dr Christopher A-L Jackson Dr Oliver B. Duffy Fault-propagation folding occurs above the lateral and vertical tips of propagating normal faults and is an important process during the initial development of normal fault systems. Fault-related folds are particularly welldeveloped in salt-influenced rift basins due to the pronounced mechanical heterogeneity imparted on the upper crust by salt, which is typically significantly weaker than the suprajacent rocks and leads to decoupling of sub- (i.e. thickskinned) and supra-salt (i.e. thin-skinned) structures. However, the structural style and evolution of fault-related folds in salt-influenced rift basins is poorly understood. In particular, relatively little is known regarding the relationship between the fault structure and growth rate, and fold geometry and distribution. Furthermore, the potential kinematic linkages that may occur between fault-fold systems, through areally-extensive salt layers, has only inferred but never quantified. This project will use 2D and 3D seismic reflection data from offshore Norway to determine the 3D geometry of fault-propagation folds adjacent to large normal fault systems in a salt-influenced rift basin. Particular emphasis will be placed on accurately determining how key fold geometric properties, such as amplitude and width, are related to throw variations along the adjacent normal fault systems. Furthermore, this project will determine the influence that salt can have on long-range kinematic interactions between fault systems of varying sizes. This PhD would suit a student with an interest in structural geology or tectonics. The candidate will hold a very strong (very high 2:1 or higher) undergraduate (BSc or equivalent) and/or masters level degree or equivalent in geology or geophysics. The PhD student will receive training in 3D seismic interpretation, wireline log analysis and quantitative structural analysis. These skills will be useful for a future career in the hydrocarbon industry or in academic or applied research. For further information on this project please contact Dr Christopher Jackson ([email protected]).