首页|Structural geometry and folding style in the North Dezful Embayment and Abadan Plain, Zagros Fold and Thrust Belt, SW Iran

Structural geometry and folding style in the North Dezful Embayment and Abadan Plain, Zagros Fold and Thrust Belt, SW Iran

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  • NSTL
  • Elsevier
The structural geometry within the fold and thrust belts is of particular significance. Consequently, a balanced regional cross-section based on surface, seismic, and subsurface data has been constructed with 236 km lenght perpendicular to the trend of folded strucutres axies in the North Dezful Embayment and the Abadan Plain in the Zagros Fold and Thrust Belt. The cross-section is divided into three districts.The geological structural crosssection passes through the Zagros Simply Folded Belt (the NE and SW Dezful Embayment districts) and the Mesopotamian foreland basin (the Abadan Plain district). This cross-section allowed to study the geometry of the thrust and fold structures vertically and horizontally, the link between the structures, and the role of the detachment horizons in the foreland part of the Zagros fold and thrust belt. The folding geometric parameters in each of the anticlines inside the cross-section have been precisely calculated. The NE Dezful Embayment district is marked by the significant activity of the faulting and the detachment horizons, which the thickness of the Gachsaran detachment horizon reaches 5 km after deformation. The thickness of this formation decreases along the SW Dezful Embayment district towards the southwest, and when it enters the Abadan Plain district and loses the salty units, its plastic behaviour declines and it loses its role in controlling the structural style. The fault activity and the detachment horizons decrease toward the southwest, reducing the structural complexity. Anticlines change from open fold to gentle fold based on the interlimb angle. The anticlines in the NE and SW Dezful Embayment districts are associated to the thrust faults and the detachment horizons, but but the anticlines in the Abadan Plain are classified as growth folds, characterized by the absence of significant detachment levels. The shortening observed in the Mishan Formation within this cross-section is 6.5 %. there is harmony in the number of the anticlines and the synclines above and below the Gachsaran detachment horizon.

Zagros Fold and Thrust BeltDezful EmbaymentAbadan PlainStructural geometryElements of Fold styleMechanical stratigraphyDetachment horizonCross-sectionFolding styleFORELAND-BASINLURESTAN PROVINCEFAULT SYSTEMEVOLUTIONDETACHMENTZONESALTSTRATIGRAPHYDEFORMATIONCONSTRAINTS

Taghavi, Ali、Hajialibeigi, Hossein、Fard, Iraj Abdollahi、Mouthereau, Frederic

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Shahid Beheshti University Faculty of Earth Sciences

Natl Iranian Oil Co NIOC

Paul Sabatier Univ

2025

10.1016/j.jseaes.2025.106575

Journal of Asian earth sciences

Journal of Asian earth sciences

SCI
ISSN：1367-9120
年,卷(期)：2025.290(Aug.)
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