Articles | Volume 15, issue 12
https://doi.org/10.5194/se-15-1479-2024
https://doi.org/10.5194/se-15-1479-2024
Research article
 | 
12 Dec 2024
Research article |  | 12 Dec 2024

Importance of basement faulting and salt decoupling for the structural evolution of the Fars Arc (Zagros fold-and-thrust belt): a numerical modeling approach

Fatemeh Gomar, Jonas B. Ruh, Mahdi Najafi, and Farhad Sobouti

Related subject area

Subject area: Tectonic plate interactions, magma genesis, and lithosphere deformation at all scales | Editorial team: Structural geology and tectonics, paleoseismology, rock physics, experimental deformation | Discipline: Tectonics
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Cited articles

Agard, P., Omrani, J., Jolivet, L., and Mouthereau, F.: Convergence history across Zagros (Iran): Constraints from collisional and earlier deformation, Int. J. Earth Sci., 94, 401–419, https://doi.org/10.1007/s00531-005-0481-4, 2005. 
Agard, P., Omrani, J., Jolivet, L., Whitechurch, H., Vrielynck, B., Spakman, W., Monié, P., Meyer, B., and Wortel, R.: Zagros orogeny: A subduction-dominated process, Geol. Mag., 148, 692–725, https://doi.org/10.1017/S001675681100046X, 2011. 
Alavi, M.: Regional stratigraphy of the Zagros fold-thrust belt of Iran and its proforeland evolution, Am. J. Sci., 304, 1–20, https://doi.org/10.2475/ajs.304.1.1, 2004. 
Aldega, L., Bigi, S., Carminati, E., Trippetta, F., Corrado, S., and Kavoosi, M. A.: The Zagros fold-and-thrust belt in the Fars province (Iran): II. Thermal evolution, Mar. Petrol. Geol., 93, 376–390, https://doi.org/10.1016/j.marpetgeo.2018.03.022, 2018. 
Bahroudi, A. and Koyi, H. A.: Effect of spatial distribution of Hormuz salt on deformation style in the Zagros fold and thrust belt: An analogue modelling approach, J. Geol. Soc., 160, 719–733, https://doi.org/10.1144/0016-764902-135, 2003. 
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Short summary
Our study investigates the structural evolution of the Fars Arc in the Zagros Mountains through numerical modeling. We focus on the effects of the interaction between basement faults and salt décollement levels during tectonic inversion, including a rifting and a convergence phase. In conclusion, our results emphasize the importance of considering fault geometry, salt rheology, and basement involvement in understanding the resistance to deformation and the seismic behavior of fold–thrust belts.