The recent aeromagnetic data over the Bida Basin, Nigeria, have been used to estimate the Curie-point depths (CPDs), geothermal gradients (GGs), and near-surface crustal heat flow (HF) of the basin. The result shows that the CPD varies between 15.57 and 29.62 km, GG varies between 19.58 and 37.25 °C km⁻¹, and HF varies between 48.41 and 93.12 mW m⁻². Regions are observed in the basin with shallow CPDs and corresponding high HFs, thus suggesting anomalous geothermal conditions.

Geothermal potential of southern part of Idaho in the US was recognized in the early 1970s; however, the commercial utilization of geothermal resources in the area is yet to be realized. The composition of hot spring/well water can tell us how hot the water at depth is. In this study, we assembled several existing thermal water compositions to estimate reservoir temperatures with a new tool. Our results show that some areas (e.g., Preston) in southern Idaho have good geothermal potential.