Geoelectrical Exploration of Mineral Deposits Using Gradient Array

Investigation of deep structures by means of non-symmetric arrays in a complex geostructural assemblage lead to difficulties in delineating the shape of the ore body and the area of interest for future metal exploration.

In the presented case study, the gradient array was applied with the objective of detecting the lateral variation of electrical resistivity and metallic factor values. As the measured values and distribution of apparent resistivity and polarizability depends to some extent by the type of device used for prospecting and of its orientation in relation to geological structure, we analyse the influence of the used geophysical array by means of 3D theoretical modeling. It resulted that a conductive body will give an anomaly shape elongated towards a direction perpendicular on the injection (AB) line. The resulted information was used for enhanced field data interpretation.