Regional tectonic model of Southern, Central part of the Mygdonian basin (Northern Greece) by applying 3D Transient Electromagnetic Modeling

Payal Rani⁎, Pantelis Soupios, Pavel Barsukov

 

The Mygdonian basin is located between Volvi and Langada lakes around 45 km North-East of Thessaloniki city in northern Greece and presents very high seismicity. To define the tectonic re- gime of the area, a detailed electromagnetic survey was performed along with the geological and lithological study of the area. The TEM data were acquired using the TEM-FAST 48 instrument for 485 soundings in 159 lo- cations. The 1-D and 2-D interpretation of the TEM data indicate the tectonic characteristics of the area. 3D modeling applied to TEM data highlighted the fracture zone in the investigated area. The geothermal field of Apollonia is also depicted. 3D TEM modeling provided invaluable informa- tion about the structural and tectonic framework of the study area, as well as the basement relief of the study area was determined. Three dominant structural trends (NW-SE, NE-SW, and W-E) were identified. These trends plus an N-S fault zone (inferred from lineament analysis of magnetic data) had played an important role in the Mygdonian basin evolution. It is the first time that clear evidence about the geothermal energy around the western part of Volvi Lake is shown. The graben – horst tectonic structure make the Southern part an ideal site for further geothermal exploration.

Journal of Applied Geophysics 176 (2020) 104008