GPR models of rock massif of the subarctic zone of the Yakutia

This article presents the developed physical and geological models for the GPR method, which is currently actively used in the study of mining and geological and geocryological conditions of developed alluvial deposits in the cryolithozone. The relevance of the development of GPR models is dictated by the need to determine the features of wave fields (radargrams) for reliable data interpretation. Typical models of horizontal layered structure of the upper part of the geological section (frozen loose sediments, including those with inclusion of layer ice, paleorules) of diamondiferous placers in the subarctic zone of Yakutia are considered. Computer modeling was carried out in the gprMax system using the numerical finite difference method in the time domain. Based on its results, the GPR models containing a scheme of the geological section with a description of electrophysical properties and a synthetic radargram were built. Analysis of the results of computer modeling allowed us to determine the features of the radargram structure, parameters of GPR signals in the presence of formation ice, paleorules sections. The results of the studies have shown that the developed GPR models contribute to the improvement of signal processing procedures and the development of data interpretation features in the study of the geological structure and geocryological conditions of alluvial deposits in Yakutia (using the example of “Mayat River” Anabar district) by GPR.

Fedorova L. L., Sokolov K. O., Prudetskii N. D., Shamaev S. D. GPR models of rock massif of the subarctic zone of the Yakutia. MIAB. Mining Inf. Anal. Bull. 2023;(12-1):129—140. [In Russ]. DOI: 10.25018/0236_1493_2023_122_0_129.

The research was carried out within the state assignment of Ministry of Science and Higher Education of the Russian Federation (theme No. 0297−2021−0020, reg. No. 122011800086−1) with the use of equipment of the Shared core facilities of the Federal Research Center ‘YSC SB RAS’ (grant No. 13.ЦКП.21.0016).

Fedorova L. L., Cand. Sci. (Eng.), associate professor, leading researcher, https://orcid. org/0000−0002−5002−6140, Mining Institute of the North SB RAS, 43 Lenin Ave., Yakutsk, 677980, Republic of Sakha (Yakutia), Yakutsk, Russia, e-mail: lar-fed-90@ rambler.ru;
Sokolov K. O., Cand. Sci. (Eng.), senior researcher, https://orcid.org/0000−0002−4179−9619, Mining Institute of the North SB RAS, 677980, Republic of Sakha (Yakutia), Yakutsk, Lenin Ave. 43, Russia, e-mail: k.sokolov@ro.ru;
Prudetsky N. D., junior researcher, https://orcid.org/0000−0002−7570−2985, Mining Institute of the North SB RAS, 677980, Republic of Sakha (Yakutia), Yakutsk, Lenin Ave. 43, Russia, e-mail: ndprudetskii@mail.ru;
Shamaev S. D., Senior Engineer, Mining Institute of the North SB RAS, 43 Lenin Ave., Yakutsk, 677980, Republic of Sakha (Yakutia), Russia, e-mail: sha.sd@inbox.ru.

Prudetsky N. D., e-mail: ndprudetskii@mail.ru

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