Evaluation of the groundwaters from the Stripa mine using stable chlorine isotopes

Groundwater samples and a rock leachate sample from the Stripa mine and south central Sweden have been analysed for their δ37Cl values. Results reveal that the salinity found at depth in the groundwater is most likely derived form water–rock interaction. The overall distribution is one of δ37Cl enrichment with depth and with chloride concentration. This trend is comparable to other sites in the Fennoscandian Shield where it is believed that deep groundwaters derive their δ37Cl values from the local bedrock.