ISOTOPIC COMPOSITION (H, O, CL, SR) OF GROUND BRINES OF THE SIBERIAN PLATFORM
S.V. Alexeev a , L.P. Alexeeva a , V.N. Borisov a , O. Shouakar-Stash b , S.K. Frape b , F. Chabaux c , A.M. Kononov a
a Institute of the Earth's Crust, Siberian Branch of the RAS, 128 ul. Lermontova, Irkutsk, 664033, Russia
b University of Waterloo, Waterloo, Ontario, Canada
c Centre de Geochemie de la Surface, Strasbourg, France
Keywords: Hydrogeochemistry; stable isotopes; brines; genesis of groundwaters; Siberian Platform
Pages: 225-236
Abstract
New data on the geochemistry and isotopic composition of chloride brines of the Siberian Platform are presented. The distribution of stable isotopes (2H, 18O, and 37Cl) in brines of the Tunguska, Angara-Lena, western part of the Yakutian and Olenek artesian basins and 87Sr/86Sr in brines of the western part of the Olenek artesian basin was studied in the context of the problem of genesis of highly mineralized groundwaters. Results of the study and comparative analysis of the geochemical and isotopic peculiarities of the Siberian Platform brines conform to the theory of brine formation through the interaction of connate waters with enclosing rocks.
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