Determination Nickel Laterite Profile using Correlation of ERT (Electrical Resistivity Tomography and Drill Core Data

In mineral exploration especially nickel laterite, required a survey technique that could describe subsurface conditions.The method used in this study is ERT (Electrical Resistivity Tomography) with Gradient array. The research was located in South Sulawesi Sorowako correlate between ERT data and drillhole data (Geochemistry & Geology layer) which results describing nickel laterite profile consisting of 4 layers. Limonite layer having resistivity values 150-300 ??.m with an abundance elements of Fe and Al. Transition layer having resistivity values 300-600 ??.m with an abundance elements of Co. Saprolite layer having resistivity values 0-300 ??.m with an abundance elements of Ni. The basic rock layer having resistivity values> 300 ??.m with an abundance elements of Mg and SiO2. The results is the pattern of nickel laterite profile based on the value of the resistivity is more synonymous with nickel laterite profiles based on geochemical compared to geological drillhole data layer