In mechanical deformation of crystalline materials, the critical resolved shear stress (CRSS; τCRSS) is the stress required to initiate movement of dislocations on a specific plane. In plastically anisotropic materials, such as Mg, τCRSS for different slip systems differs greatly, leading to relatively poor ductility and formability. However, τCRSS for all slip systems increases as the physical...

Tectonic events caused by paleoearthquakes are reflected in sediments. Outcrops and cores from the Chang-7 Member of Late Triassic Yanchang Formation, Ordos Basin Northern China, yield a wide variety soft-sediment deformation structures (SSDSs), many which laterally extensive for more than 150 km. They include various types folds, liquefaction flow (liquefied sand dyke, liquefied breccia), grav...

Existing techniques for real-time simulation of object deformation are well suited for animating soft materials like human tissue or two-dimensional systems such as cloth. However, simulation of deformation in malleable materials and fracture in brittle materials has only been done offline because the underlying equations of motion are numerically stiff, requiring many small steps in explicit i...

3D geological modeling of lithogeochemical and geological data provides insight into the role of the sulfide ore horizon and associated footwall hydrothermal alteration in localizing shear strain in the Flin Flon volcanogenic massive sulfide deposits, Canada, as deformation evolved from brittle-ductile to ductile regimes during collisional stages of the 1.9–1.8 Ga Trans-Hudson orogeny. 3D spati...

A new continuum model to describe damage, fragmentation and large deformation of pulverized brittle materials is presented. The multiple-plane-microcracking (MPM) model, developed by Espinosa, has been modiAed to track microcracking on 13 orientations under high pressure, high strain rate and high deformation. This model provides the elastic and inelastic response of the material before massive...

Based on a review of literature and few case studies, this paper summarizes the state art dating folds thrusts, then presents discusses how recent advances in K–Ar illite U–Pb calcite geochronology applied to brittle structures fold-and-thrust belts have helped better constrain timing, sequence, duration rates deformation.

The basement of southeast Brazil is traditionally interpreted as the result Neoproterozoic and early Paleozoic orogenic cycles. Wide regions Atlantic Plateau (southeast Brazil) are characterized by rocks tectonic structures Precambrian age. According to classical literature, these have not been affected tectonics since Miocene, despite fact that they rest close Cenozoic basins, which suffered r...

We conduct a two-dimensional numerical experiment on the lower crust under an intraplate strike-slip fault based on laboratory-derived power-law rheologies considering the effects of grain size and water. To understand the effects of far-field loading and material properties on the deformation of the lower crust on a geological time scale, we assume steady fault sliding on the fault in the uppe...