Isotope composition of groundwater in the Azov-Kuban and Eastern Pre-Caucasian artesian basins

Studying results of the groundwater isotope composition in the Neogene-Quaternary and Mesozoic sediments of the Azov-Kuban and Eastern Pre-Caucasian artesian basins have shown in the Pliocene sediments a rather wide distribution of ??relict?? groundwater, formed because of melting of the Late Pleistocene Caucasian glaciers, as well as of groundwater formed due to its mixing with the meteogenic waters of the subsequent Holocene infiltration cycles. Also, the areas are revealed in the Lower-Miocene sediments where meteogenic waters are mixed with sedimentation waters, while in the Mesozoic formations??the areas where into the sedimentation waters wedge-shaped meteogenic waters of Pleistocene and Holocene infiltration periods are intruded.