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Doming along the Zagros transpression zone, SW Iran: insights from microstructural analysis of heterogeneous deformation

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Abstract

Detailed structural and kinematic analyses of deformed structures in the Sanandaj-Sirjan Metamorphic Belt in the Ghouri area revealed the occurrence of three gneissic sub-domes with semi-elliptical shapes with their major axes parallel to the Zagros Transpression Zone boundary (NW-SE direction). These sub-domes are cored by sheared quartzo-feldspathic gneisses which surrounded by sequences consisting of garnet amphibolites, phyllites, phyllonites, muscovite schists, and deformed conglomerates. The Kuh-e-Zard, Chah-Sabz, and Chah-Goni sub-domes resulted from the interaction of the lower to middle continental crust and hot subducting Tethyan oceanic crust during subduction/continental collision. These sub-domes were squeezed between thrusts in the Zagros dextral transpression zone. The variations in the kinematic vorticity and strain estimates revealed that sub-simple shear transpressional deformation is highly heterogeneous in each sub-domes.

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Acknowledgments

The authors would like to thank Professor Abdullah M. Al-Amri, Editor-in-Chief, and Prof. François Roure, Associate editor of the Arabian Journal of Geosciences for their editorial authority. Constructive comments and suggestions by Prof. Soumyajit Mukherjee (IIT Bombay) and an anonymous reviewer improved the scientific content of the manuscript. Authors are thankful to the Research Council of University of Sistan and Baluchestan and Shiraz University which have supported the project.

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Correspondence to Ali Faghih.

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Responsible Editor: François Roure

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Partabian, A., Faghih, A. Doming along the Zagros transpression zone, SW Iran: insights from microstructural analysis of heterogeneous deformation. Arab J Geosci 14, 648 (2021). https://doi.org/10.1007/s12517-021-06835-8

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  • DOI: https://doi.org/10.1007/s12517-021-06835-8

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