Uranium and arsenic dynamics in volcano-sedimentary basins - An exemplary study in North-Central Mexico

► We identified elevated groundwater As and U concentrations around San Luis Potosí. ► Incompatibility of As and U leads to common enrichment in late volcanic products. ► Volcanic glass dissolution is the main trace element release mechanism. ► Contributions from basin filling sediments modify As/U signatures. ► Similarities and differences to a comparable climatogeological area were detected.