Geophysical studies of the internal structure of glacial-permafrost stone formations of the Central Altai

• Published in: Ice and Snow
• Main Authors: G. Dyakova S., A. Goreyavcheva A., O. Ostanin V., V. Olenchenko V., R. Biryukov Yu., Г. Дьякова С., А. Гореявчева А., О. Останин В., В. Оленченко В., Р. Бирюков Ю.
• Other Authors: The authors thank IWEP SB RAS for the equipment provided. The reported study was funded by RFBR according to the research project № 18-35-00463/18 «Research of the internal structure of glacial-permafrost rock formations of Altai on the basis of geophysical methods»., Авторы благодарят ИВЭП СО РАН за предоставленное оборудование. Работа выполнена при поддержке РФФИ (проект № 1835-00463/18 «Исследование внутреннего строения гляциально-мерзлотных каменных образований Алтая на основе геофизических методов»).
• Format: Article in Journal/Newspaper
• Language: Russian
• Published: IGRAS 2020
• Subjects: Altai;electrical resistivity tomography;glacial-permafrost rock formations;GPR-sounding;permafrost;rock glacier; Алтай;георадиолокационное зондирование;гляциально-мерзлотные каменные образования;каменные глетчеры;многолетняя мерзлота;электротомография; Arctic; Arctic and Alpine Research; Ice; permafrost; Permafrost and Periglacial Processes; The Cryosphere
• Online Access: https://ice-snow.igras.ru/jour/article/view/782; https://doi.org/10.31857/S2076673420010027

Several complexes of glacial-permafrost stone formations have been studied in the Central Altai using geophysical methods. The features of their internal structure together with characteristic differences between them depending on the dynamic activity, altitude and geomorphological characteristics were determined. Integration of the methods of the electrical resistivity tomography and the GPR-sounding made it possible to distinguish roofs on all the studied formations and to estimate thicknesses of the stone-ice cores. Studying of eight formations with different degrees of activity and located at different altitudes did show that the thicknesses of the stone-ice cores increase with height: from 8–10 m in the mid-mountain zone up to 18-20 m in the highlands. The values of the specific resistance of cores inside the glacial-stone formations are directly proportional to altitudes of the objects (the correlation coefficient is 0.7) that give an indication of increasing in the amount of ice in them with height. The depth of occurrence of the roof of the stone-ice material in the formations is more dependent on the exposure of the slope on which the object is located, and changes from 1–2 m on slopes of the Northern exposure up to 4–6 m on slopes of the Southern and Western exposures. C помощью комплекса методов электротомографии и георадиолокационного зондирования установлена глубина залегания и оценена мощность каменно‑ледяных ядер, а также прослежена взаимосвязь морфологии поверхности и внутреннего строения гляциально‑мерзлотных каменных образований Центрального Алтая.