Abstract:

The fold geometry formed by propagation of basement fault into sedimentary cover is quite difficult to explain based on parallel folding theory owing to the marked rheological difference between the basement and the sedimentary cover. Erslev put forward a theory called the tri-shear fault propagation folding, which holds that the strong brittle deformation of underlying fault is accommodated by a triangular-like widening-upward distributional shear zone, and the triangle apex is pinned to the fault tip. Har...

Key words:

tri-shear, faulting, folding, fault propagation folding, kinematic model, mechanical model, oil-bearing structure, earthquake forecasting,