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Karsts du Zagros (Iran)

Abstract : The study of the Zagros chain is envisaged under three different aspects, with in the first place a step on paleoenvironnement, in the second place a hydroclimatic approach, and finally an analysis of relationships between man and karst. Relation ships between three tectonic zones of the Zagros are envisaged to retrace its morphological evolution. For this, three zones of studies have been retained : Alisadr to the north of Hamadan, Kuh-e-Garrin to the south of Nahavand and Sabz Poshan to the south of Shiraz. From geological and geomorphological indices preserved by the immunization karst, confronted with endokarst indices, the paleoenvironnement and paleoclimatic evolution of these mountains can be retraced in order to specify the general evolution of the Zagros. The study is approached by the synthesis of a large variety of indices observed at different scales. More over, different paleoenvironnement indices are apprehended by means of analytic sedimentologic techniques and physico-chemical analysis (mineralogical clay analysis and sands, concretions lamina analysis, texture analysis, calcareous mesurement, sands morphoscopy, soil densimetry, datings with microfossils and datings with isotopics). This study is also associated to a precise characterization of the current hydroclimatic fonctioning of Zagros mountains in order to better understand their current evolution. Thus precipitations, that still remain not well appreciated in the total area of the Zagros, are apprehended at different spacial and temporal scales : scale of the Zagros and that of an endoreic of 4000 km² (region of Shiraz) with also the use of a pluviometric model (PLUVIA). The water balance of this basin is then approached more precisely with the modeling of variations of its water level. The hydrochemical balance and notably the specific dissolution of the three study zones are also apprehended. Finally the analysis of the adaptation of local populations to the karst is presented through two different axes : the study of lours nomads and qanat (SW of Shiraz).
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https://tel.archives-ouvertes.fr/tel-01417409
Contributor : Dominique Dumas Connect in order to contact the contributor
Submitted on : Thursday, December 15, 2016 - 3:52:38 PM
Last modification on : Monday, June 27, 2022 - 3:03:49 AM

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  • HAL Id : tel-01417409, version 1

Citation

Dominique Dumas. Karsts du Zagros (Iran) . Géographie. Université de Strasbourg, 1998. Français. ⟨tel-01417409⟩

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