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Wykorzystanie modelowania geochemicznego oraz badań izotopowych siarczanów do identyfikacji procesów kształtujących skład chemiczny wód podziemnych ujęcia Gliwice-Łabędy

Ślósarczyk K., Jakóbczyk-Karpierz S.

Przegląd Geologiczny

2018

Vol. 66, nr 8

495--502

In order to determine geochemical processes affecting chemical composition of groundwater in the Gliwice-Łabędy well-field area two research methods were applied. Chemical analysis allowed us to assess the quality of groundwater in the Triassic karst-fractured-porous aquifer of the southwestern part of the major groundwater basin no. 330. The chemical composition of groundwater is distinguished by spatial heterogeneity highlighted by higher mineralization and concentrations of individual ions in the western area. In addition, all samples collected in 2016 were analyzed for the δ34 and δ18 to identify sources of sulfates in the waters examined. The study revealed a different origin of these ions depending on location of the wells sampled. The results of chemical analysis and archival data allowed for application of geochemical modeling in identification ofprocesses taking part in groundwater chemistry evolution. Simulations of processes controlling water chemistry within the Triassic aquifer were conducted using The Geochemist’s Workbench 10.0.6. The examined processes encompassed dissolution of minerals forming the carbonate aquifer and Miocene evaporates overlying the Triassic aquifer as well as mixing ofgroundwater and surface water.