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Aligarh Muslim University (1993)

Structure and tectonics of the Zagros structural belt Iran

Rangzan, Kazem

Titre : Structure and tectonics of the Zagros structural belt Iran

Auteur : Rangzan, Kazem

Université de soutenance : Aligarh Muslim University

Grade : Doctor of Philosophy (PhD) 1993

Résumé
The Iranian region represents a complex geo-tectonic system in the Alpine-Himalayan belt bounded by the Eurasian plate in north and Arabian plate in the south. The major geo-tectonic divisions of the Iranian region comprise Kopeh Dagh, Alborz Belt, Makran Accretionary Complex, East Iran Belt, Central Iran Blocks (including Lut and Tabas Blocks), Urumieh Dokhtar Arc, Sanandaj-Sirjan Zone, Imbricate Zone, Zagros Fold Belt and Molasse Cover Sequence which are characterized by distinct geological and geophysical signatures. Their boundaries are tectonic grains, some of which are mantle tapping crustal fractures and palaeosutures. The Sanandaj-Sirjan Zone, Imbricate Zone, Zagros Fold Belt and Molasse Cover Sequence have been included by the author into Zagros Structural Belt, which forms the subject of present study. The work presents the structure and tectonics of the Zagros Structural Belt in southwest Iran in fulfilment of the requirement for Ph.D degree in Remote Sensing Applications of the Aligarh Muslim University, Aligarh. The remotely sensed data were integrated with geological and geophysical data for interpretation of structure and tectonics of Zagros structural Belt. Lithology, geomorphology and structural fabric of the Zagros Structural Belt were studied with ground inputs based on primary surveys and secondary data base. The LANDSAT frame No. 166-037 corresponding to longitude 47°08’ - 49° 00’ E and latitude 32° 20’ - 34° 00’ N was selected as key area for detailed aaalYsis of the Zaqroa Structural Belt. The geomorphology of the Zagros is the morpho-tectonic expression of the Alpine-Himalaya subduction cycle and collision, expressed by tectonics of Iranian and Arabian plates. The opening of the Red Sea has led to the closing of the foreland basins. This process started development of high mountains during the last 4-5 Ma in Zagros Structural Belt. The morphotectonic expressions of the present day tectonic activity in the Zagros is documented by the development of anomalous drainage, compressed meanders, cuesta and hogback ridges, structural and erosional hills and valleys, which were studied as recognition elements for structural and tectonic interpretation of remotely sensed data.

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