STABLE ISOTOPES OF HYDROGEN, OXYGEN AND CARBON WHEN INTERPRETING FORMATION CONDITIONS OF SURFACE WATER BODIES OF YAMALO-NENETS AUTONOMOUS REGION

• Published in: Bulletin of the Tomsk Polytechnic University Geo Assets Engineering
• Main Authors: Olesya E. Lepokurova, Irina S. Ivanova, Aleksandr N. Pyrayev
• Format: Article in Journal/Newspaper
• Language: Russian
• Published: Tomsk Polytechnic University 2023
• Subjects: Surface waters; peat; stable isotopes of carbon; hydrogen; oxygen; arctic regions; Engineering geology. Rock mechanics. Soil mechanics. Underground construction; TA703-712; Arctic; Ivanova; Khadytayakha; Ngarka-Khadytayakha; Rus’; nenets; permafrost; Tundra; Yamalo Nenets; Siberia
• Online Access: https://doi.org/10.18799/24131830/2023/6/4038; https://doaj.org/article/1c798a954a304987b2cb113510316b01

Link for citation: Lepokurova O.E., Ivanova I.S., Pyrayev A.N. Stable isotopes of hydrogen, oxygen and carbon when interpreting formation conditions of surface water bodies of Yamalo-Nenets autonomous region. Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2023, vol. 334, no. 6, рр.7-19. In Rus. The relevance. Stable isotopes are widely used in geochemistry for solving various genetic problems, which is associated with the assumption of the constancy of the original isotopic composition of any element, subsequently changed under the influence of various processes. In the practice of surface water studies, isotope methods are used for solving not only direct genetic problems, but also for various related problems. In arctic regions affected by permafrost, water isotopes are increasingly being used to assess the contribution of melt water to the balance of total river flow, especially in conditions of accelerated melting, which leads to changes in the hydrological regime and the overall structure of the landscape. The analysis of the isotope composition of dissolved inorganic carbon is of particular research interest, since it gives an idea of the participation of organic matter released during the thawing of permafrost peat in isotope exchange with water. The joint use of the chemical and isotopic characteristics of water bodies will make it possible to study in detail the genesis, features of the formation and interaction of these waters with the environment. The main aim: clarification of the genesis and conditions of formation of surface water bodies in the Arctic regions of Western Siberia, subject to the influence of permafrost, using the composition of stable isotopes H, O, C. Objects: surface water bodies of the tundra and forest-tundra natural zones of the Yamalo-Nenets Autonomous Region. Field work took place in August 2020. Water samples for the isotopic composition were taken from three large rivers – Ob, Taz, Pur, and in the right tributary of Pur River – Ngarka-Khadytayakha, 7 ...