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RESEARCH PRODUCT

Analytical and Numerical Investigation of 3D Multilayer Detachment Folding

Naiara FernandezBoris J. P. Kaus

subject

Quantitative Biology::BiomoleculesMaterials science010504 meteorology & atmospheric sciencesDeformation (mechanics)NucleationNumerical modelingGeometry010502 geochemistry & geophysics01 natural sciencesFolding (chemistry)Thick plateGrowth rateLayer (electronics)0105 earth and related environmental sciencesPhase diagram

description

Multilayer detachment folding, in which a sequence of sedimentary layers is compressed above a weaker salt layer, is a common mode of deformation in thin-skinned fold-and-thrust belts. Here, we investigate the dynamics of multilayer detachment folding with three different viscosities: lower detachment or salt layer, overlying weak layers and competent layers. A semi-analytical solution, based on thick plate analysis of multilayer systems, is used to create mechanical phase diagrams of folding dominant wavelength and growth rate as a function of material parameters. The validity of the phase diagrams is tested and confirmed beyond the nucleation stages of folding by performing several 2D and 3D numerical simulations.

10.1007/978-3-642-32408-6_163http://dx.doi.org/10.1007/978-3-642-32408-6_163