Studying of the geothermal structure of Mahalat hot springs in Iran using the 3D inversion of magnetic data
M. Mohammadzadeh1, M. Darijani*1, M. Mirzaei2, B. Oskooi1
1Institute of Geophysics, University of Tehran
2Department of Physics, Faculty of Sciences, Arak University
Accepted to the 4th Iranian National Conference of Economical Geology, March 2012.
Abstract
Existence of many hot springs in Mahalat and also its special geology show a probable deep geothermal system. In order to delineate susceptible area with geothermal potentials accurately, ground magnetometery was performed around hot springs of Mahalat. Total magnetic field data was collected along 10 profiles of 16 km, with station distance of 40 m and profile distance of 1.5 km. During this survey, measurements were performed on over 4000 stations. This paper evaluates application of 3D inversion of geomagnetic data for estimating depth and shape of geothermal structure. For this purpose, we used Mag3D software. This software determines the best depth bodies with an iterative approach. Existence of magnetic anomaly was interpreted as a source of geothermal reservoir, with probable depth of more than 3000 m. Presence of thick alluvial travertine in the area implies high antiquity of this geothermal reservoir. Preliminary results of the interpretation showed a reliable agreement with those resulted from aeromagnetic data and also with the geological and hydrological evidence of the hot springs in the area.
* I am corresponding author because of working by software, interpretation and writing the paper.
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