NAGRA Opalinus Clay (…002 - Version 1
FEP 16.1.10 Hydrothermal activity

Indications of hydrothermal activity (in a broad sense) in northern Switzerland are the thermal springs (< 50 °C) to the north and south of the Permo-Carboniferous Trough (e.g. at Zurzach). The pattern of hydrothermal activity in the region is not expected to change significantly over the next million years. It is also expected that significant geothermal anomalies can be avoided by repository siting. Future extraction of deep groundwater in the vicinity of the repository, used for hydrothermal purposes or as mineral water for drinking, can not be ruled out.