GEOCHEMISTRY OF GROUND ICE, SALINE GROUNDWATER, AND BRINES IN THE CRYOARTESIAN BASINS OF THE NORTHEASTERN SIBERIAN PLATFORM
L.P. Alekseeva, S.V. Alekseev
Institute of the Earth's Crust, Siberian Branch of the Rususian Academy of Sciences, ul. Lermontova 128, Irkutsk, 664033, Russia
Keywords: Подземные льды, хлоридные подземные соленые воды и рассолы, гидрогеохимическая зональность, стабильные изотопы, гидроминеральное сырье, водопритоки, Ground ice, chloride saline groundwater and brines, hydrogeochemical zonation, stable isotopes, hydromineral resources, water inflow
Abstract
We present results of a comprehensive study of ground ice, saline waters, and brines in the cryoartesian basins of the northeastern Siberian Platform. The composition of major geochemical types of ground ice is considered. The specifics of the hydrogeochemical zonation of the cryoartesian basins are the regional distribution of chloride saline waters and brines. Study of stable isotopes (18О, D, 37Cl, 81Br, and 87Sr/86Sr) led us to the conclusion that the chloride brines resulted either from the leaching of halogen rocks or from the metamorphism of bittern connate water. The drainage brine reserves (hydromineral resources) of the Udachnaya kimberlite pipe in the Olenek cryoartesian basin are assessed.
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