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    • List of Articles Mohammad Javanbakht

      • Open Access Article

        1 - Use of morphometric indices in drainage network changes (Indicators in the Kordkanlo Basin)
        Mohammad Javanbakht مهدی رضا پورسلطانی ناصر خلقی
        The Kordkanlo Basin, one of the Atrak sub-basins, located in the northeastern of the Ghoochan city, the Khorasan Razavi Province; is situated in Kopet Dagh geologic zone. The overall objective of this study is to evaluate the morphotectonic effects on the drainage netwo More
        The Kordkanlo Basin, one of the Atrak sub-basins, located in the northeastern of the Ghoochan city, the Khorasan Razavi Province; is situated in Kopet Dagh geologic zone. The overall objective of this study is to evaluate the morphotectonic effects on the drainage network of the basin, using morphometric indicators. In this research, morphometric quantitative indicators of hypsometric integral (H), the ratio of the valley area to the an area of half-circle with a radius equal to the valley depth (V), the ratio of the width of valley floor to a height of the river (VF), asymmetry factor (AF), the river’s length gradient index (SL), transverse topography symmetry factor (T) and index of mountain front sinuosity (SMF), the basin shape index (BS) and the index of (Lat) have been used. This purpose tries to identify the role of change in lithological and tectonic agents on the Kordkanlo river basin using topographic maps, digital elevation model (DEM) and the information obtained in the field survey. In this context, ArcGIS software has been used for determining geomorphic indicators to determine the tectonic characteristics of the basin. Finally, index values were evaluated by the lat index. The result reveals high tectonic activity in the study area. Manuscript profile
      • Open Access Article

        2 - The study of post depositional history in the Chehel Kaman formation, in the eastern regions of Kopet-Dagh, North-East Iran
        Somayeh Erfani Mohammad Javanbakht Mehdireza Poursoltani
        The Chehel Kaman Formation of the upper Paleocene age formed from carbonate and siliciclastic sediments is located, in the Kapeh Dagh Sedimentary Basin. Two sections where considered for the purpose of research into the effective diagenetic processes of this formation. More
        The Chehel Kaman Formation of the upper Paleocene age formed from carbonate and siliciclastic sediments is located, in the Kapeh Dagh Sedimentary Basin. Two sections where considered for the purpose of research into the effective diagenetic processes of this formation. The Cheshmeh Qorban section with a thickness of 270.8m located 140km down the Mashhad – Sarakhs Highway while the Shourlog Section with a thickness of 288.3m is situated 130km down the Mashhad – Mozduran – Sarakhs Highway. 120 samples were taken from these sections and 100 thin cross sections produced from these samples. The carbonate rocks of this formation have been affected by diagenetic processes such as cementation, micritization, neomorphism, dissolution stress and porosity. These processes have taken place at the four marine diagenetic stages of the underground and surface sweet water. All cross sections were investigated using a gypsum bladein order to identify any extant porosity. All changes including type and percentage were plotted for each section. The results of the investigations indicated that in the Cheshmeh Qorban section of the Chehel Kaman Formation the lowest porosity content with a 3% rate of recurrence was related to microporosities while the greatest accumulation of porosity with a 7% recurrence rate in porosity was due to fracture porosity. In the Shourlog section meanwhile the lowest porosity content with a 2% recurrence rate was related to microporosities and the greatest accumulation with a recurrence rate of 6% was due to vuggy porosity. Manuscript profile