The effect of basement step/topography on the geometry of the Zagros fold and thrust belt (SW Iran): an analog modeling approach

作者：Farzipour Saein A^*; Nilfouroushan F; Koyi H

来源：International Journal of Earth Sciences, 2013, 102(8): 2117-2135.

DOI：10.1007/s00531-013-0921-5

• Cover thickness
• Deformation front
• Analog modeling
• Zagros

Systematic analog models are run to study the variation in deformation across basement steps in the Zagros fold-thrust belt. Our model results demonstrate that basement configuration/topography influences the sedimentation thickness and, hence, the kinematics and geometric evolution of the fold and thrust belt. The greater the difference in thickness between the adjacent cover units across a basement step, the sharper and clearer will be the offset of the deformation front. Based on model results, we conclude that in a fold-thrust belt, where basement step/topography is covered by a layer of ductile salt acting as a decollement, the effect of the salt decollement on the evolution of the belt is far greater than the effect of thickness variation of the cover units.

• 出版日期2013-11