Imaging of stratigraphic trap forming aquifer in the Ergene Basin, Corlu formation, in the vicinity of Sarilar Village with vertical electrical sounding

In exploration of groundwater, unlike the layers showing regular sequence, stratigraphic traps (sand, gravel, clay lens) are always a problem. In addition to geological characteristic of the lens structures, geophysical methods are used to identify geometric features of the lens such as locations, dimensions, thickness and depth. It also identifies physical features such as conductivity, resistivity and porosity. The study area is located in the north of Corlu Sarilar village of Tekirdag (Marmara region). It is also located in the west part of Corlu creek flowing in the direction of NE-SW. The lowest level of the study area is 123 mt. and the highest level is 146 mt. In the study area, geological structures were analyzed for modelling the stratigraphic traps in the different level and dimension of Pliocene aged Corlu formation using the geoelectric method. In the geophysical study, Vertical Electrical Sounding (VES) method was applied in 21 points using Schlumberger array. Line length (AB/2) is 300 m. Geometric locations of stratigraphic traps were monitored and physical features were tried to define by generating resistivity level map and two dimensional geoelectric profile obtained from VES resistivity values. Resistivity values in the region are between 18.5 Ohm-m and 7.0 Ohm-m, while low resistivity zones are observed at shallower depth