Self-Potential Studies in Volcanic Environments: A Cheap and Efficient Method for Multiscale Fluid-Flow Investigations

Figure 9

Self-potential map of the Garrotxa monogenetic field (left). The map highlights the strong lateral heterogeneity of the medium resulting in a complex setting. A western zone and an eastern zone appear to be separated by a NNW–SSE lineament and a NNE–SSW lineament. A plot of self-potential vs. elevation (right) seems to confirm this separation by displaying a strong difference in SP behaviour between the east and west sides, which is likely due to lithological and hydrogeological contrasts between the two areas. Figure modified from [89].