Detection of Fault Lineaments of the Zagros Fold-thrust Belt Based on Landsat Imagery Interpretation and theirS Relationship with Hormoz Series Salt Dome Locations Using GIS Analysis

In the Zagros structural zone of Iran, there is a broad range of emergent salt domes, a unique morphology in the world that is developed in tectonic environment. In the Zagros fold-thrust belt, emergent salt domes exhibit the linear patterns. Such trends indicate their relation to the linear structural features which are observable by Landsat imagery. Detection of fault lineaments and their spatial relationship with salt dome locations have been the matter of this study on statistically viewpoints. Based on the remote sensing analysis, horizontal displacements of parts of folded structures and distribution of Hormoz series salt domes, 33 fault lineaments were detected. A statistical method called the weight of evidence modeling is used for determination of the relationship between salt domes places and fault lineaments trends. For this purpose, the fault lineaments map and the center of salt domes map are converted to the raster one and buffers extracted around the fault lineaments; then, the spatial relationship between the salt domes and fault lineaments are quantified using weights of evidence method. The salt domes are associated spatially with the fault lineaments within distances of 1 km in horizon. Weights of evidence method show that the fault lineaments could be the most important foci for emplacement of salt domes in the study area.