Enhancement magnetic anomalies maps of the study area. (a) ASA (Analytic Signal Amplitude); (b) VIAS (Vertical Integral of the Analytic Signal); (c) VDR1-THDR-TDR (First Vertical Derivative of the Total horizontal Derivate of the Tilt Angle), and (d) THGED (Tilt Angle of the Horizontal Gradient Enhanced). Black dots correspond to H₂ bearing wells and black triangles to proven H₂ leakage. QF= Quadrilátero Ferrífero; MC: Mata da Corda Formation; Alto do Paranaíba Mafic Alkaline Igneous Province (APIP): SN/AS= Serra Negra/Salitre, Ax= Araxá and TP= Tapira. The data used and enhancement methods applied are better described in item 2 of the Appendix.