Identification of salty zone in Grabagan salt mine, Kradenan sub-district, Grobogan district, Central Java']Java, Indonesia

Grabagan Village is located to the southwest of Bledug Kuwu, the famous mud volcano in Central Java Province. In this area, there are surface manifestations such as mudflow and saltwater explosion. Mud volcano is a product of mountains that emit mud or clay onto the earth's surface. The aim of this research is to know the dispersion of salty zones in Grabagan mud volcano using 3D model. This research was done by geoelectric method using Sclumberger configuration with stretch of approximately 300 meters at 8 measurement points. Based on the resistivity value distribution, the research area is dominated by salty zone with resistivity values of 0.0851-8.22 Om and at depth of 0.75-129 meters. The salty zone leads to the northeast direction. Two vertical columns were identified in southeast and southwest of the measured area.