pdf № 376, April

DOI: 10.19110/geov.2026.4.1

Conodont associations from the Givеtian deposits of the Middle Devonian in the Pokrovskoye section (Middle Urals, Eastern slope) have been studied. The Vysotinsky regional stage of the Givetian has been subdivided in detail. This study is based on the biostratigraphic method. The taxonomic determination of the conodont associations and their correlation with the zonal scale have been conducted. Fifteen species of conodonts belonging to eight genera are identified: Ancyrolepis, Belodella, Ctenopolygnathus, Eucostapolygnathus, Polygnathus, Linguipolygnathus, Icriodus, and Tortodus. The consecutive standard conodont zones of the Lower-Middle Givetian: Polygnathus timorensis, Po. rhenanus — Po. varcus and Po. ansatus are established within a 2.6 m thick section. Zonal conodont associations are compared with those of other regions.

Keywords: conodonts, Middle Devonian, Givetian, varcus Zone, Vysotinsky regional stage, Middle Urals

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DOI: 10.19110/geov.2026.4.2

The fauna of small mammals from two new localities of the Chernyshev Ridge in the Polar Urals, near hydrothermal vents, has been studied. As a result, two phases of microteriofauna development have been identified. The first, the Late Glacial, is characterized by the absolute dominance of tundra and tundra-steppe species (89—94 %), reflecting the harsh periglacial conditions. The second is Holocene, with a predominance of forest (up to 43 %) and intrazonal forms (up to 45 %), with a low proportion of tundra and tundra-steppe (19—22 %). A comparison with the microtheriofauna of the foothills of the Urals and the Timan Ridge shows a similarity in the dynamics of the fauna from the Late Glacial to the boundary of the Middle and Late Holocene (~ 4200 cal. years ago). During the transition from the Middle to Late Holocene, when the warm conditions of the Atlantic period gave way to a pronounced Subboreal cooling, which led to greater climate continentality, onset of permafrost in the tundra, and southward retreat of forest vegetation, in the north of the Chernyshev Ridge the proportion of tundra and tundra-steppe species began to increase again, while in the south (~66—66.5° N) their share continued to decline. Despite climate fluctuations and shifts in vegetation zones, the thermal springs of Pymvashor did not have a noticeable impact on the faunal composition in any of the phases, and the modern rodent community of the site does not differ from that in the adjacent areas of the Bolshezemelskaya tundra.

Keywords: small herbivore mammals, rodents, Late Glacial, Holocene, Chernyshev ridge, northeastern part of European Russia

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DOI: 10.19110/geov.2026.4.3

The Starobin deposit of potassium salts is the largest one in Europe, it was discovered in 1949 and has been developed since the early 1960s. Together with the town of Soligorsk and its adjacent territories it forms the Soligorsk mining region. This region is located in the Starobin centrocline within the Pripyat Trough northwestern part and is characterized by a high level of man-made impact on the subsoil due to the underground development of potash horizons. The problem of increased geodynamic activity monitoring within the territory of the Soligorsk mining region has become extremely urgent since the end of the 1970s, when the first significant earthquake occurred there on the 10^th of May, 1978 (Aronov еt al., 2010).

Experimental investigations, aimed at measuring the radon volume activity, were carried out on the outskirts of Minsk in the winter period 2024—2025 and in the southern part of the Starobin potassium salt deposit within the Chervonay Sloboda-Malodusha fault in the autumn–summer period 2025. Measuring System “Alpharad plus” for radon volume activity monitoring equipped with data transmission capability was used for experimental observations. Measurements were carried out in accordance with the diagrams and modes recommended by the System manufacturer (Manual, 2021).

First results of the radon emission monitoring were obtained, and a series of anomalous radon emission values was observed prior to the occurrence of seismic events.

Keywords: mining activities, seismicity, monitoring, fault, radon, emission

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DOI: 10.19110/geov.2026.4.4

The article describes the main negative aspects of storing municipal waste at landfills and substantiates the need for their layer-by-layer backfill with inert materials. The main materials used for layer-by-layer isolation were considered and the idea of using techno-soil based on landfill leachate stabilized with blast furnace slag with a mass ratio of components of 1: 1: 0.027 (filtrate, blast furnace slag and coagulant) was proposed. Invitro studies were conducted to substantiate the possibility of using techno-soil as a layer-by-layer insulating material: the chemical and phase composition of the techno-soil was determined; hazard class IV of the waste-based material was established; it was proven that the content of toxic substances in the aqueous extract from the material was lower than or equal to their content in the leachate of landfill; the integral oxidation index was measured and equal to 260 mgO₂/l; the particle size of the material, its good compactibility and gas permeability to landfill gases, as well as water permeability to infiltrating atmospheric precipitation were established; the solubility of the material was less than 3 % by weight. Thus, the possibility of using techno-soil based on landfill leachate stabilized with blast furnace slag as an inert material in the operation of solid municipal waste landfills was proven.

Keywords: municipal waste, solid municipal waste landfill, landfill leachate, blast furnace slag, techno-soil, solid municipal waste landfill isolation

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