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Table 1 Isotopic and thermometry methods used for long-term integrity analyses of salt domes

From: Identification and applicability of analogues for a safety case for a HLW repository in evaporites: results from a NEA workshop

Method Objective
δ18O and δ2H in brines of Zechstein rock salt Distinction between formation waters of meteoric or marine origin
δ37Cl in Zechstein rock salt Extent of evaporation, input of seawater, re-dissolution of salt
δ34S and δ18O in sulfates of Zechstein rock salt Indication of changes in the inflows, restriction conditions, redox reactions, and biogenic processes
δ13C and δ18O in carbonates Post-sedimentation transformation of carbonates due to a contact with meteoric waters
87Sr/86Sr in rock salt Alteration of brine chemistry due to interaction processes with deep hydrothermal fluids or adjacent rocks
Micro-thermometry of fluid inclusions Homogenization temperature: temperature during formation of fluid inclusion