water Article Chemical and Isotopic Features of a High pCO2 Natural Mineral Water from Essentuki Field (Caucasian Mineral Water Region, Russia) Ekaterina I. Baranovskaya 1,* , Natalia A. Kharitonova 1,2 , Georgy A. Chelnokov 3 , Irina A. Tarasenko 2 and Alexey A. Maslov 1 1 Faculty of...