The eastern iranian orocline

Bagheri, Sasan; Gol, Shamsoddin Damani

doi:10.1016/j.earscirev.2020.103322

Cited by 23 publications

(24 citation statements)

References 189 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Important block rotations occurring between the closing Sistan Belt, subjected to an E‐W compression and the Makran region under a continuous NNE‐SSW shortening during the Cenozoic (Dolati & Burg, 2013) was possibly induced by the post‐Eocene indentation of India with the Eurasian margin, causing the extrusion of crustal‐scale blocks also along its western margin. A similar scenario was also suggested in Bagheri and Gol (2021), who considered the evolution of the Sistan Belt as the result of large‐scale oroclinal bending around a vertical axis following the westward tectonic escape of the Afghan block prompted by the India‐Eurasia collision. In this geodynamic framework, the CCW rotation of the Lut Block is a direct consequence of the oroclinal bending of the Sistan Belt.…”

Section: Discussionsupporting

confidence: 66%

Cenozoic Dextral Shearing Along the Arusan Sector of the Great Kavir–Doruneh Fault System (Central Iran)

et al. 2021

View full text Add to dashboard Cite

The structural analysis of large intracontinental wrench faults is fundamental for deciphering the long‐term evolution of continental crust in complex areas in terms of their geodynamic evolution and large‐scale crustal block displacements. In this contribution, we demonstrate a pre‐Miocene dextral activity of the present‐day left‐lateral Great Kavir ‐ Doruneh Fault System (GKDFS, Central Iran), one of the major intracontinental active strike‐slip faults extending from the Afghan border to the Nain region between Central Iran and the Sanandaj‐Sirjan Zone. We document important dextral shearing recorded along a segment of the GKDFS, the Arusan Fault System (AFS), located east of Jandaq, close to the present‐day active trace of the GKDFS. The AFS include several ENE‐WSW striking strands exposed for a length of more than 50 km, which couple pre‐Cretaceous ophiolites and metamorphic basement units with the Cretaceous succession of the Khur basin. The fault shows transpressional structures consistent with a dextral shear including thrusts and en échelon folds affecting the Cretaceous carbonate units. Paleostress reconstruction based on mesoscopic fault analysis and related folds geometry allowed to establish vorticity parameters indicating that deformation occurred close to a total simple shear regime with a calculated Wk between 0.9 and 1. The enormous Meso‐Cenozoic dextral displacements occurred along the AFS and along the entire GKDFS are attested by the up to several hundreds of kilometers offset of the Paleotethys suture zone, from NE Iran to the western border of Central Iran.

show abstract

Section: Discussionsupporting

confidence: 66%

Cenozoic Dextral Shearing Along the Arusan Sector of the Great Kavir–Doruneh Fault System (Central Iran)

et al. 2021

View full text Add to dashboard Cite

show abstract

“…It acted as a dextral system in response to NW-SE transpression during the Eocene and Miocene, but later became a leftlateral system controlled by the anticlockwise rotation of the CIM (Javadi et al 2013) and N-S compression (Mattei et al 2012;Tadayon et al 2017Tadayon et al , 2019. Bagheri and Gol (2020) propose that the indentation of India into Eurasia played a role on the kinematics of these faults.…”

Section: Regional Frameworkmentioning

confidence: 89%

“…The dominant geological elements of eastern Iran are the CIM and the Helmand (Afghan) block, which are separated by the Sistan suture zone (Eastern Iranian Orogen), and are succeeded farther north by a series of belts of different origins and ages (Fig. 1; Bagheri and Gol 2020). The CIM consists of the Lut, Tabas and Yazd blocks, which are separated from each other by a series of broadly N-S trending faults.…”

Section: Regional Frameworkmentioning

confidence: 99%

“…suggesting a close connection between regional deformation and magmatism. Bagheri and Gol (2020) related oroclinal buckling in the East Iranian Orogen to westward escape of the Afghan (Helmand) block as a consequence of the collision of India with Eurasia. These authors interpret the sequence of tectonic and magmatic events to result from lithospheric delamination, which caused the widespread regional Eocene to Miocene magmatic activity.…”

Section: Granite (G2) and The Eocene Magmatic Stagementioning

confidence: 99%

“…The tectonic processes in Iran were also directly affected by the larger scale convergence of India with Asia and the resulting lateral indentation (e.g. Gaina et al 2015;Bagheri and Gol 2020). The interaction of the various tectonic elements through time has resulted in the very complex geological relationships we observe today.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The composite Triassic–Eocene Poshteh pluton, eastern Iran, an Eo-Cimmerian element south of the main Paleotethys suture

Mahmoudi

Corfú

2022

Int J Earth Sci (Geol Rundsch)

View full text Add to dashboard Cite

The composite Poshteh Pluton, at the northeastern margin of the Central Iranian Microplate near Taybad in eastern Iran, is positioned at a critical tectonic junction, south of the inferred main Paleotethys suture and along the major regional Doruneh Fault system. It consists of two distinct intrusions. Quartz monzonite is dated in this study by zircon U–Pb ID-TIMS to 215.8 ± 0.5 Ma, an age that coincides with the time of closure of the Paleotethys during the late collisional stages of the Eo-Cimmerian Orogeny. It is geochemically very similar to coeval plutons present along and north of the Paleotethys suture, where they intruded Carboniferous-Permian arc sequences, ophiolites and flysch. The Poshteh quartz monzonite is located south of the suture in a position similar to the Anarak and related complexes further west, which previously have been interpreted as reflecting Mesozoic and Cenozoic disruption of the Eo-Cimmerian Orogen by extensional and transtensional processes. The Triassic quartz monzonite was subsequently invaded by granite at 41.23 ± 0.31 Ma. The emplacement was in part structurally controlled by the Doruneh Fault system and associated to hydrothermal alteration and Fe mineralization. The granite is thus a coeval member of a widespread late Eocene to Oligocene plutonic suite in the region, and likely the result of delamination and melting of the subcontinental lithosphere.

show abstract