Fault-related fold styles and progressions in fold-thrust belts: Insights from sandbox modeling

Growth and erosion of fold-and-thrust belts with an application to the Aconcagua fold-and-thrust belt, Argentina

[1] The development of topography within and erosional removal of material from an orogen exerts a primary control on its structure. We develop a model that describes the temporal development of a frontally accreting, critically growing Coulomb wedge whose topography is largely limited by bedrock fluvial incision. We present general results for arbitrary initial critical wedge geometries and in...

Erosional control of the kinematics and geometry of fold‐and‐thrust belts imaged in a physical and numerical sandbox

[1] We investigate the effect of systematically varying erosion intensity (K) on the geometry and kinematics of fold‐and‐thrust belts modeled using equivalent conditions in physical and numerical experiments. Similar material properties and boundary conditions were used to compare numerical experiments to those modeled in the sandbox using an erosion rule that removes mass from the scaled sand ...

Collapse structures in Dowgonbadan region, Zagros fold- thrust belt

Allochthonous masses are common structures in Zagros fold-thrust belt. They are generally considered as collapse structures formed by the influence of gravity and in rock units with competency contrast. However, large allochthonous masses mapped in Dowgonbadan area in Dezful Embayment near the Mountain Front Fault (MFF) of Zagros show characteristics different from the belt common collapse stru...

Kinematics of the Dena Fault and Its Relation to Deep-Seated Transverse Faults in Zagros Fold-Thrust Belt, Iran

The NNW-trending Dena Fault, with 140 km length, cuts the major structures of Zagros Fold-Thrust Belt in Borujen region. The fault has divided the region in two zones, in which different structural, andmorphological features as well assedimentation and seismtectonic characteristics have developed. This study presents a new interpretation for the kinematics of Dena Fault based on field evidence....

Geomechanical modeling of a fault - propagation fold