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Electrical (E) and Electromagnetic (EM) geophysical methods have different sensitivities to the electrical properties, their anisotropy and spectral dispersion. In this work, we presented a novel inversion scheme for the joint inversion of electrical and electromagnetic (E&EM) datasets with modelling of induced polarization and 3D EM kernel. The approach integrates the system transfer function within a unified data space and introduces key features for balancing the joint inversion, with the disentanglement of model and forward meshes. We applied this joint inversion scheme to a mineral exploration survey carried out in Portugal within the SEMACRET Horizon Europe project. The comparison with independent modelling results revealed enhanced resolution of the joint models, and a unique IP parameterization accounted for both galvanic and inductive data. We believe that the E&EM joint inversion developed and applied in this study represents a breakthrough in the state of the art of galvanic and inductive investigations, pushing a significant step forward in mineral exploration.