Investigating salt diapirism effects in morphology of north-east of shahrood

Salt diapirism is the process of penetrating evaporite minerals into the upper layers leading to formation of special morphology which are important due to oil resources, human settlements and bypass roads. Therefore, researchers e.g. Talbot (1979), Moores (2007), Harding (2015), Arian (2015), Saket (2005), Afifi (2009), Rajabi (2008) and Zamani (2013) have been studied this phenomena in Iran. study area is located in the east of Shahrood which is one of the areas affected by salt diapirism concluding to special morphologies that their approximate age back to Miocene period. In addition to salt diapirism, likely Jylan- Farashian fault in north, Jylan anticline in center of the region caused to create some fractures that through them salt penetrates the upper layers and developed salt morphologies. The effect of the dissolution process plays an important role in the formation of salt caves in the region that for the first time in the study to be considered. In addition, mechanisms such as salt difference density, erosion and anthropogenic factors have an important role in salt forms. Diapirism geomorphological effects of salt are observed in the form of salt domes, joints and fractures, secondary folds, salt caves and salt valleys, polygons, glaciers, springs, cones and cauliflower shapes. In this paper, using field studies, satellite images of Landsat(ETM+) and DigitalGlobe as well as digital elevation model (DEM) datasets acquired from SRTM sensor, the impact of salt diapirism on the morphology of the studied area is investigated aiming to the results be used in future construction activities of the region.