Evaluation of the Talkhab fault system in the formation of Mighan Arak plain subsidence using specific electrical resistance

Articles in Press

Authors

Department of Geology. Faculty of Basic Sciences. Payam Noor University, Tehran. Iran

Abstract

Land subsidence is one of the serious challenges in urban and rural areas that can significantly affect infrastructure and the environment. In the Mighan region of Arak, the subsidence caused by human activities and natural changes, especially around the Talkhab fault System, has caused many concerns. As one of the important geological structures in this region, Talkhab fault System plays a key role in the formation and development of subsidence. In this research, by using the electrical resistance method, the location of the Talkhab fault System in the region was identified and revealed. In this study, 30 soundings of specific electrical resistance were taken using the Schlumberger arrangement along 3 profiles. Finally, using all the information, the modeling results were evaluated and the locations of discontinuities and faults were determined with a good approximation. Investigations show that the Talkhab fault System, as an active area, can cause changes in water pressure and, as a result, subsidence. The investigations carried out show that the results obtained from the interpretation of the sections indicate the existence of faults parallel to each other that were identified during the operations of specific electrical resistance, which were not exposed in the geological maps of the area. Therefore, Talkhab fault as an active fault system can cause changes in water pressure and as a result subsidence in the region.

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Articles in Press, Accepted Manuscript
Available Online from 12 April 2025

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