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Assessment of beshagard Mountain Tectonic Activity (South of Jazmurian Depration) Application IRAT Index

Open Journal of Geology 2017年第3期7卷 295-319页

作者： Ali Khoddami Atashan Mohsen Pourkermani Amir Shafii Bafti Manouchehr Ghorashi Soheila Bouzari Department of Geology Islamic Azad University North Branch Tehran Iran Department of Geology Faculty Members of Islamic Azad University North Branch Tehran Iran Department of Geology Faculty Members of Islamic Azad University Zarand Iran Research Institute for Earth Sciences-Geological Survey of Iran Tehran Iran Department of Geology Faculty Members of Islamic Azad University North Branch Tehran Iran

Morphometry status of tectonic active areas around the beshagard mountain is as a result of the interaction of neotectonic movements, erosion and subsidence processes. Bashagard mountain contains two attached mountains (GhaleTohi imountain and Bashagard mountain) with an altitude of 2000 meters at the south of the Jazmurian subsidence surrounded by Quaternary and Neogene. The boundary between the north Makran and Jazmurian subsidence is a fault that located between Band-e-Ziarat unit and western alluvial fan and units of Ganj, Mokhtarabad and Rameshk in the south. Tectonic activity has a significant impact on their morphometry status and drainage basin system. We studied geomorphological patterns of drainage and mountain fronts features for clear changes and high style of mountain. In this study, we studied seven geomorphological indicators for each basin including Vf, Bs, Smf, Sl, Af, RA, Hi between west and south mountain front of Jazmurian. Morphometric indexes were divided in three categories. The average of seven indicators is an index of relative tectonic activity (IRAT). The level of tectonic activity of each IRAT category was determined. Finally, tectonic activity was evaluated for each drainage basin. Results show good similarity between IRAT category and ratio of tectonic activity of the number of drainage basins. The streams profile shows the uplift movement in the western part of subsidence Jazmurian. Thus, the achievements obtained from the analysis of topographic indices, the region’s river system and geomorphological evidence show the movements of uplift and movement of right-lateral strike-slip of Jiroft fault in the west and reverse faulting of Kranj and Jazmurian faults at east of subsidence Jazmurian that all indicates the diagonal tectonic movements.

关键词： Morphometry beshagard Mountain Jiroft Fault. Active Tectonic IRAT Index

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