Deep-water megasplay faults may promote or limit earthquake rupture and tsunami genesis. To better understand how affect associated potential, we use the Discrete Element Method (DEM) to model upper plate as a wedge that is partitioned into seismic (velocity-weakening, VW) inner an aseismic outer (velocity-strengthening, VS) wedge, combined with splay fault rooting at decollement. We examine ef...

The Bradost and Chinara mountains are two well-known geomorphic features in the Iraqi Kurdistan Region (IKR), forming anticlines, besides Shireen Sare Musa which located north of anticline, all four anticlines trend NW – SE. dissected by Greater Zab River that swings along its course within due to tens very old landslides and/or plunges. studied different thrust faults, extend for a few kilomet...

buckle folds are common traps for hydrocarbon in several contractional provinces. buckle folds form where stratified sequences rest a top salt or some other utterly weak rock as a decollemet zone in units with high competency contrasts by a compressive stress which acted along the length of the rock layers. an important parameter affecting buckle folding of a competent zone above a mobile decol...

Buckle folds are common traps for hydrocarbon in several contractional provinces. Buckle folds form where stratified sequences rest a top salt or some other utterly weak rock as a decollemet zone in units with high competency contrasts by a compressive stress which acted along the length of the rock layers. An important parameter affecting buckle folding of a competent zone above a mobile decol...

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...

[1] Even though the rheology of thrust wedges is mostly frictional, a basal ductile decollement is often involved. By comparison with purely frictional wedges, such brittleductile wedges generally display anomalous structures such as backward vergence, widely spaced thrust units, and nonfrontward sequences of thrust development. Laboratory experiments are used here to study the deformation of b...

Several varieties of seafloor hydrothermal vents with widely varying fluid compositions and temperatures and vent communities occur in different tectonic settings. The discovery of the Lost City hydrothermal field in the Mid-Atlantic Ridge has stimulated interest in the role of serpentinization of peridotite in generating H(2)- and CH(4)-rich fluids and associated carbonate chimneys, as well as...

Contractional deformation of passive continental margins may resemble early stages induced subduction initiation. Mechanical instabilities are required to permit underthrusting the oceanic plate. Therefore, success developing a new zone will largely depend on rheology mantle lithosphere. In this physical analogue modelling study, range viscosities subject different convergence rates serve as pr...

Exhumed fossil subduction zones are archives of the deformation conditions and mechanisms from depths not directly accessible. Microstructural analysis samples exhumed therefrom offers insights into micromechanics processes associated with such as earthquakes, slow aseismic creep. Subducted continental metasediments Tuscan Metamorphic Units Italian Northern Apennines contain a mylonitic foliati...