D.E. Edemsky1, V.E. Tumskoy2, I.V. Prokopovich3

1,3 Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation RAS (Moscow, Russia)

2 Melnikov Permafrost Institute, SB RAS (Yakutsk, Russia)

3 MIREA – Russian Technological University (Moscow, Russia)

1 deedemsky@gmail.com, 2 vtumskoy@gmail.com, 3 prokop@izmiran.ru

The history of glaciation in the North-East of Russia is very poorly studied. In 2022, a thermocircus was discovered for the first time on moraine deposits in the Oymyakon Highlands. In the upper part of the moraine section, ice wedges were found which were not visible from the surface. To establish their size and configuration of the polygonal network, it was necessary to conduct geophysical studies, which were carried out using ground penetrating radar (GPR). Antennas with a central frequency of 150 and 50 MHz were used. The aim of the work was to survey the slope of the moraine adjacent to the thermocircus in the Suntar River valley using the GPR method. The parameters of the polygonal network were described, the applicability of the GPR method for such studies was assessed, and the methodology for taking measurements was developed. The main aims included localizing subsurface ice wedges, analyzing GPR data to identify features of the cryogenic structure, and developing recommendations for predicting thermokarst hazard. At the frozen soil and ice boundary, high-amplitude diffraction of electromagnetic waves is distinguished, which, according to the authors, is one of the attributes of localization of repeated ice wedges. Test measurements were carried out and a set of attributes for localization of underground ice wedges were determined depending on the antenna type. It is shown that the use of the GPR method allows localization of the polygonal-wedge ice system in moraine deposits.

Edemsky D.E., Tumskoy V.E., Prokopovich I.V. Ground penetrating radar survey of thermocirque on a moraine in the Suntar River valley. Electromagnetic waves and electronic systems. 2025. V. 30. № 3. P. 94−104. DOI: https://doi.org/10.18127/j15604128-202503-11 (in Russian)

1. Dostovalov B.N. On the physical conditions of the formation of frost-breaking cracks and the development of fractured ice in loose rocks. Permafrost research in the Yakut Republic. 1952. Is. 3. P. 162–194. (in Russian)
2. Romanovsky N.N. Fundamentals of cryogenesis of the lithosphere. Moscow: Publishing House of Moscow State University. 1993. 336 p. (in Russian)
3. Edemsky D.E., Tumskoy V.E., Prokopovich I.V. Study heavily icy deposits with recurrent ice wedges by ground penetrating radar. Electromagnetic waves and electronic systems. 2024. V. 29. № 5. P. 22−29. DOI 10.18127/j15604128-202405-04. (in Russian)
4. Arcone S.A., Sellman P.V., Delaney A.J. Radar detection of ice wedges in Alaska. CRREL Rep. 1982. V. 19. P. 82–43.
5. Hinkel K.M., Doolittle J.A., Bockheim J.G., Nelson F.E., Paetzold R., Kimble J.M., Travis R. Detection of subsurface permafrost features with ground-penetrating radar, Barrow, Alaska. Permafrost and Periglacial Processes. 2001. V. 12. № 2. P. 179–190. DOI 10.1002/ ppp.369.
6. Forte E., Pipan M., Casabianca D., Di Cuia R., Riva A. Imaging and characterization of a carbonate hydrocarbon reservoir analogue using GPR attributes. Journal of Applied Geophysics. 2012. V. 81. P. 76–87. DOI 10.1016/j.jappgeo.2011.09.009.
7. Munroe J.S., Doolittle J.A., Kanevskiy M.Z., Hinkel K.M., Nelson F.E., Jones B.M., Shur Y., Kimble J.M. Application of ground penetrating radar imagery for three-dimensional visualisation of near-surface structures in ice-rich permafrost, Barrow, Alaska. Permafrost and Periglacial Processes. 2007. V. 18. P. 309–321. DOI 10.1002/ppp.594.
8. De Pascale G.P., Pollard W.H., Williams K.K. Geophysical mapping of ground ice using a combination of capacitive coupled resistivity and ground-penetrating radar, Northwest Territories, Canada. Journal of Geophysical Research. 2008. V. 113. P. F02S90. DOI 10.1029/ 2006JF000585.
9. Sokolov K., Fedorova L., Fedorov M. Prospecting and evaluation of underground massive ice by ground-penetrating radar. Geo-sciences. 2020. V. 10. P. 274. DOI 10.3390/geosciences10070274.
10. Tumskoy V.E., Torgovkin N.V., Romanis T.V. Thermocyrk on a moraine in the valley of the Suntar River. Relief and quaternary formations of the Arctic, Subarctic and Northwestern Russia. 2021. № 8. P. 252–257. DOI 10.24412/2687-1092-2021-8-252-257.
11. Popov A.V., Prokopovich I.V., Edemsky D.E., Morozov P.A., Berkut A.I. Deep penetration subsurface radar: principles and application. Electromagnetic waves and electronic systems. 2018. V. 23. № 4. P. 28–36. (in Russian)
12. Vladov M.L., Starovoitov A.V. Introduction to georadiolocation. Moscow: Moscow State University Publishing House. 2004. 153 p. (in Russian)
13. Giannopoulos A. Modelling ground-penetrating radar by GprMax. Construction and Building Materials. 2005. V. 19 № 10. P. 755–762. DOI 10.1016/j.conbuildmat.2005.06.007.
14. Bricheva S., Schennen S., Stanilovskaya J. Prospects of the FDTD modeling tool gprMax for imaging of ice wedges. 9th International Workshop on Advanced Ground Penetrating Radar. 2017. P. 1–5. DOI 10.1109/IWAGPR.2017.7996093.