EGU General Assembly 2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Arabia-Eurasia Collision and The Geodynamic Models for Plateau Uplift in Turkish-Iranian Plateau

Uğurcan Çetiner1, Jeroen van Hunen1, Oğuz Göğüş2, Mark Allen1, and Andrew Valentine1
Uğurcan Çetiner et al.
  • 1Department of Earth Sciences, Durham University, Durham, United Kingdom (
  • 2Eurasia Institute of Earth Sciences, Istanbul Technical University, Istanbul, Turkey

Orogenic plateaux, the broad high elevation regions of Earth, are mainly formed by plate convergence/shortening and in some cases, there is (hot) mantle support for their formation. Two major examples at present are the Tibetan and Turkish-Iranian plateaux. For instance, Turkish-Iranian plateau, is a consequence of the continental plate collision between Arabia and Eurasia, which began at ~34-25 Ma and continues to the present day. The plateau can be regarded as two distinct entities, with a boundary at roughly the political border between Turkey and Iran. While there have been studies to explain the uplift history, lithospheric/crustal structure and associated magmatism, currently, the mechanisms behind the plateau growth are not well understood. The western region, also known as the East Anatolian Plateau, has a tectonic plate structure with a near-normal crustal thickness (~35-40 km) and a markedly thinned mantle lithosphere (a few 10s of km in thickness). This suggests that, to achieve its regional elevation of ~2 km there is likely considerable support from the underlying hot asthenospheric mantle. In the east, the crust of most of Iran is thicker, up to ~65 km, and it is underlain by a variable but thicker mantle lithosphere (commonly >100 km thick). It is intriguing why these two regions have similar surface elevations (2-3 km on average) and regional geomorphology, despite predicted lithospheric structures. This study will apply new class of geodynamic models to understand how such plateaux form in response to plate collision/convergence and possible mantle upwelling/support. By comparing models with different setups (varying lithospheric thicknesses, strength profiles etc.) suggested by the natural case studies, this study will provide a more general assessment of controls on plateau growth with 2-D and 3-D perspectives in the context of Arabia-Eurasia collision. Further, the study will also help to explain the role of the forces that generate dynamic topography in the evolution of such geologic structures.

How to cite: Çetiner, U., van Hunen, J., Göğüş, O., Allen, M., and Valentine, A.: Arabia-Eurasia Collision and The Geodynamic Models for Plateau Uplift in Turkish-Iranian Plateau, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-568,, 2022.