Effects of multi-seamount subduction on accretionary wedge deformation: Insights from analogue modelling

Accretionary prisms in subduction earthquake cycles: The theory of dynamic Coulomb wedge

[1] We expand the theory of critically tapered Coulomb wedge for accretionary prisms by considering stress changes in subduction earthquake cycles. Building on the Coulomb plasticity of the classical theory, we assume an elastic–perfectly Coulomb plastic rheology and derive exact stress solutions for stable and critical wedges. The new theory postulates that the actively deforming, most seaward...

Earthquake faulting in subduction zones: insights from fault rocks in accretionary prisms

Subduction earthquakes on plate-boundary megathrusts accommodate most of the global seismic moment release, frequently resulting in devastating damage by ground shaking and tsunamis. As many earthquakes occur in deep-sea regions, the dynamics of earthquake faulting in subduction zones is poorly understood. However, the Integrated Ocean Drilling Program (IODP) Nankai Trough Seismogenic Zone Expe...

Analogue modelling of continental collision: Influence of plate coupling on mantle lithosphere subduction, crustal deformation and surface topography

Effects of oceanic ridge subduction on accretionary wedges: Experimental modeling and marine observations

Sandbox modeling is used to study the deformation of accretionary wedges caused by the subduction of oceanic ridges. The first experiment incorporates a massive ridge within a sand wedge. The wedge thickens and shortens when the forward propagation f the basal decollement ceases. The wedge thickening results in taper change, reactivation of preexisting thrusts, and retreat of the frontal part o...

Formation of bands and ridges on Europa by cyclic deformation: Insights from analogue wax experiments

[1] We perform a set of analogue wax experiments aimed at understanding the processes and conditions that lead to lineament formation on Europa. We heat a layer of wax from below and cool it from above so that a solid layer of wax forms above a molten layer, simulating either the liquid ocean or the actively convecting part of the ice shell. The solid layer of wax is then deformed periodically,...