The nature and origin of sand dunes in Kashan ERG, Iran
Journal Title: International Journal of Farming and Allied Sciences - Year 2014, Vol 3, Issue 5
Abstract
Wind erosion is a process of wind-forced movement of soil particles. This process has the distinct phases of particle entrainment, transport and deposition. Because Iran locate in area that is sensitive about geological and climatic factors makes ERG in deposition phase that scattered in nineteen areas of Iran and they are included more than two Percent of it. Kashan ERG is very importance region in central of Iran about living, agriculture and industry then identifying of nature and origin of sand dunes is very important. In this study for identified and separated of detachment area used from interpretation of aerial photographs, satellite images and field operations. Finally, fifty samples were transferred to the laboratory for granulometric, mineralogical and morphoscopy tests. Results show that the study area belongs to the Cenozoic and include in marne and shale as well as region forms from many facies. Analysis of wind data show that the final orientation of sand transport in Kashan ERG is from southwest and west to northeast and north. And water in height region is more Carbonate as well as in low region carbonate to sulfate and in playa region is sulfate to Chlorin. Morphoscopy test proves that the origin of sands is in the water flows so sands in Kashan area do not have a very distant geological origin. Sand dunes are located at an altitude of 800 to 950 meter in region. In general, the sand dunes in north and north-west region of Kashan are in SSE-NNW and in east is SSW-NNE until NE-SW eventually in north is in NS direction. Basic density of the sand in the area shows irregularly handle funnel-shaped.
Authors and Affiliations
Mohammad Reza Rahdari, Hassan Khosravi, Ali Akbar Nazari Samani
Keywords
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