نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه نفت و معدن و مواد، دانشکده مهندسى عمران و منابع زمین،واحد تهران مرکز دانشگاه آزاد اسلامی، تهران، ایران
2 گروه زمین شناسی، دانشگاه پیام نور، تهران، ایران
3 گروه فیزیک، واحد تهران مرکز، دانشگاه آزاد اسلامی، تهران،ایران
4 زلزله شناسی مهندسی، دانشگاه تهران، تهران، ایران
کلیدواژهها
موضوعات
عنوان مقاله English
نویسندگان English
The main purpose of this research was to identify the faults in Derke area of Tehran. For this purpose, geoelectrical profiles with Wenner-Schlumberger array, ground penetrating radar (GPR), and the diffraction-distance exponential function were used for the fractal measurement of the geoelectrical profile. In the conducted field visits, fractures and faults with different lengths were detected in large areas of rocks in the region. North Tehran fault is the most important and influential fault in the studied area. Among other sub-faults in the region, we can mention Imamzadeh Daoud, Darband and Shirpala faults. The results of geoelectric profile processing show a very strong drop in specific resistance at the distance of 96 meters of the profile due to the existence of a fault zone. The minimum changes of specific electrical resistance under the fractal method shows a linear trend with a relative drop in the fractal dimension. In some areas, an unusual increase in the fractal dimension and the creation of chaotic conditions indicate faulted and fractured areas. Also, the changes related to the sharp drop in the amplitude of electromagnetic waves in the GPR radargram at distances of 90 to 100 meters confirm the existence of a fault zone in the studied area.
کلیدواژهها English
