The effects of plate margin inhomogeneity on the deformation pattern within west-Central Zagros Fold-and-Thrust Belt

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• 作者：Zaman Malekzade^a ; ^{z_malekzadeh@pnu.ac.ir} ; Olivier Bellier^b ; Mohammad Reza Abbassi^c ; Esmaiel Shabanian^b ; ¹ ; Christine Authemayou^b ; ²
• 关键词：Zagros ; Dezful ; Indentation ; Strain partitioning ; Orocline
• 刊名：Tectonophysics
• 出版年：2016
• 出版时间：14 December 2016
• 年：2016
• 卷：693
• 期：part_PB
• 页码：304-326
• 全文大小：6932 K
• 卷排序：693

文摘

In this contribution, we benefited from gravity, topography, GPS, seismic, structural and kinematics data to constrain: (1) the Dezful behaves as an indenter, (2) there is a gradation in the tectonic regime from thrust in foreland to the strike-slip in hinterland; (3) inhomogeneous plate margin rigidity can change the deformation pattern and tectonic regime by change of obliquity and escape of the upper crust to the salients as free mechanical boundary and, in this case, plate convergence direction may not be the first-order constraint; (4) ductile shear in viscous lower crust facilitates the strain partitioning and escape; (5) indentation caused the deformation to be concentrated in a HZB as out-of-sequence thrust faulting in addition to propagating toward the foreland; 6) the MFF is a diachronous fault figuring out the Zagros orocline that its activities changed in time and space; 7) thin- and thick-skinned tectonics are consistent but they do not follow a constant configuration: in recesses the deformation is followed by thin-skinned tectonics in foreland and thick-skinned in hinterland but in salients both are active in foreland.