EVOLUTION OF HYDROGEOCHEMICAL FIELD OF NORTH AND ARCTIC REGIONS OF THE WEST SIBERIAN SEDIMENTARY BASIN IN THE MESOZOIC

• Published in: Izvestiya Tomskogo Politekhnicheskogo Universiteta Inziniring Georesursov
• Main Authors: Dmitry A. Novikov, Anatoliy V. Chernykh, Yana V. Sadykova, Fedor F. Dultsev, Vasilina A. Khilko, Irina I. Yurchik
• Format: Article in Journal/Newspaper
• Language: Russian
• Published: Tomsk Polytechnic University 2019
• Subjects: hydrogeological cycle; paleohydrogeochemistry; infiltration; elision; hydrogeochemistry; oxford regional reservoir; western siberia; arctic region; Engineering geology. Rock mechanics. Soil mechanics. Underground construction; TA703-712; Arctic; Siberia
• Online Access: https://doi.org/10.18799/24131830/2019/10/2314; https://doaj.org/article/ffc2c3a8a8d7412f83a44f3f1efa1418

The relevance of the work is in identification of fundamental role of paleohydrogeological factors in the evolution of the hydrogeochemical field in the Mesozoic of the West Siberian sedimentary basin northern and arctic regions. For the first time, the paper proposes the mechanism explaining their contribution to formation of hydrogeochemical anomalies in the Oxford reservoir (Upper Jurassic aquiferous complex) of the studied region, where hydrogeochemical inversion is widely developed. The aim of the research is to identify the features of composition of syngenetic waters disposed together with the sediment in the expelled and infiltration stages of a sedimentary basin on the basis of established cycling hydrogeological history of the West Siberian sedimentary basin northern and arctic regions; to carry out the comparative analysis of the current and syngenetic waters and determine the nature of hydrogeochemical anomalies. Methods. The methods developed by A.A. Kartseva, S.B. Vagina, E.A. Baskov and other researchers on paleohydrogeological reconstructions of sedimentary basins were used. The periodization of hydrogeological history was carried out, with identification of the main hydrogeological cycles (with the infiltration and elizion stages). Paleohydrogeochemical studies on the Arctic regions of the West Siberian sedimentary basin were carried out for the Jurassic-Cretaceous section using the methodology for reconstructing the salt composition of the waters of ancient marine and alluvial basins, paleogeographic maps and hydrogeochemical database of Siberian sedimentary basins. Results. The paper introduces the results of paleohydrogeological reconstructions of the West Siberian sedimentary basin northern and arctic regions. It was established that sedimentary waters dominate in the hydrogeological section of the studied region, in some cases diluted with infiltrogenic waters that have penetrated during the regression of the sea basin. A comparative analysis of buried syngenetic waters of the Oxford basin ...