Document Type : Original Research Paper
Authors
1 PhD Student, Department of Geology, Faculty of Basic Sciences, Islamic Azad University, Science and Research Branch, Tehran, Iran
2 Associate Professor, Department of Geology, Faculty of Basic Sciences, Islamic Azad University, Science and Research Branch, Tehran, Iran
3 Professor, Department of Geology, Faculty of Basic Sciences, Islamic Azad University, Science and Research Branch, Tehran, Iran
4 Assistant Professor, Department of Geology, Faculty of Basic Sciences, Islamic Azad University, Science and Research Branch, Tehran, Iran
Abstract
The Zagros suture zone is one of Key regions. Continent - Continent collision between Arabian plate and Iranian Block. This region is coincided by High Zagros and Zagros Simply Fold Zones in Western side and in other side is the Sanandaj- Sirjan Zone. The region of this research in situated in Northern part of suture zone. The Zagros suture is oriented parallel to the other collision Structures as passive and active margins of Neo- Tethys Basin and also to Magmatic Arc (Urmiyeh - Dokhtar Arc).
The main Faults in this region which we can mention by name are Zagros Main Thrust Fault and Zagros Main Recent Fault, Which they are also parallel to others structures. This region of suture zone in highly deformed and structures as folds, faults and nappes are the evident of a long compression Tectonics. The aim of this research firstly is analysing of folds and secondly is calculation of shortening rate of crust in this part of collision Zone. Three structural section (Eslam Abad- e- Gharb - Mahidasht, Kamyaran and Gazorkhani) have been balanced and the rate of shortening which is obtained respectively is 6252m , 6530m and 2040m.
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Hessami, K., Koyi, H. A., Talbot, C. J., Tabasi, H. and Shabanian, E., 2001- Progressive unconformities within an evolving foreland fold-and-thrust belt, Zagros Mountains: Geological Society, London,969-981.
Falcon, N. L., 1969- Problems of the relationship between surface structure and deep displacements illustrated by the Zagros Range. Geological Society, London, Special Publications, 31, 9-21.
Berberian, M., 1981- Active Faulting and Tectonics of Iran. Zagros Hindu Kush Himalaya Geodynamic Evolution, 33-69.
Alavi, M., 1991- sedimentary and structural characteristics of the paleo- Tehys remnants in northeastern Iran . Geol. So. of Amer.
Rull. V. 103, pp. 983.992.
Saidi, A., Brunet, M. F. and Ricu, L. E., 1997 - Continental accretion of Iran Block to Eurasia as seen froom Late Paleozoic to Early Cretaceous subsidence curves. Geodyn. Acta (paris). 10.5.189-208.
Saidi, A., 1995- Calandrier de la migration Permo-Triassique et morcelement Mesozoique des elements continentaux de Iran. Apports de la subsidence et du Paleomagnetisme, These de Doctorat. Universite Paris 6.
Ricou, L. E., 1994- Tetheys reconstructed: Plates, continental fragment and their boundaries since 260 Ma. From to south-eastern Asia. Geodyn. Acta, 7. 169-218.
Farhoudi, G., 1978- A comparison of Zagros geology ti island arcs. Journal of Geology 86,328-34.
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