pdf № 378, July

DOI: 10.19110/geov.2026.6.1

Regional seismic surveys and borehole drilling in the basement of the eastern part of the West Siberian geosyneclise confirmed the presence of ancient blocks overlain by thick, moderately dislocated Upper Proterozoic and Paleozoic subplatform sediments. These subside beneath the Mesozoic-Cenozoic sedimentary cover of the geosyneclise and form the Cis-Yenisei and Gydan sedimentary basins, which are promising for oil and gas production. The paper summarizes the results of a comprehensive analysis of new geological and geophysical data, clarifies the seismogeological model of sedimentary complexes, the history and conditions of their formation. We also examine the tectonic evolution of the western margin of the Siberian Craton in the Neoproterozoic and Paleozoic, discussing similarities and differences in the structure and genesis of two basins that developed within the passive continental margin during the late Proterozoic and early Paleozoic. The relationship of the Gydan Block to cratonic structures and, consequently, its geodynamic nature, remains unclear. However, unlike the Cis-Yenisei Block, no distinct suture zone is observed here, and there are no traces of oceanic (ophiolite) complexes. This may indirectly indicate the presence of a marginal portion of the Siberian Craton itself, rather than a terrane-based block. The generation and accumulation potential of ancient sediments in these areas is analyzed. A preliminary qualitative forecast of the oil and gas potential of the basins is made by a number of criteria.

Keywords: Western Siberia, basement, Cis-Yenisei and Gydan sedimentary basins, Upper Proterozoic-Paleozoic deposits, oil and gas potential

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DOI: 10.19110/geov.2026.6.2

We have identified vein formations in the southern part of the Kharbey subzone of the Kharbey-Marunkeu SFZ of the Polar Urals. The formations crosscut amphibolites and plagiogneisses of the Khanmeikhoy and Laptayugan suites (PR₁?) and extend N and NE. The veins, up to 2 m thick, are composed of microcline-quartz-oligoclase and quartz-oligoclase granites, predominantly biotite, and are synmetamorphic or postmetamorphic in their occurrence. As reflected by the composition of the primary igneous biotite, the rocks, composing the veins, are similar to I-type granitoids of the calc-alkaline series and formed in mesoabyssal and abyssal settings from a crustal source. The age of the granites, determined for the first time using the ³⁹Ar/⁴⁰Ar method on biotite, is 349±4 Ma, corresponding to the Early Carboniferous. The formation of the granite veins coincides with the onset of high-temperature metamorphism at the onset of collisional processes in the formation of the Uralides, which resulted in the formation of gneisses and amphibolites. Thus, the granite pegmatites under consideration are Late Paleozoic syncollisional igneous formations in the northern part of the paleocontinental sector of the Polar Urals.

Keywords: granite veins, magmatic biotite, 39Ar/40Ar age

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DOI: 10.19110/geov.2026.6.3

An event-stratigraphic framework is presented for the Famennian — Lower Carboniferous (Mississippian) interval of northeastern European Russia, comprising six global and subglobal events. In sections, spanning a wide facies spectrum (from shallow-water shelf to bathyal), we record occurrences of the Famennian (Dasberg, Hangenberg) and Tournaisian–Serpukhovian (Lower Alum Shale (Mid-Tournaisian), Mid-Aikuanian, Serpukhovian Event) events, as well as an isotopic anomaly in the lower-middle parts of the Famennian. For the purposes of stratigraphic correlation, the most promising are geobiological events that combine lithological, isotopic, and paleontological markers (Hangenberg, Mid-Aikuanian, Serpukhovian Event).

Keywords: Upper Devonian, Lower Carboniferous, event stratigraphy, correlation, carbon isotopic anomalies

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DOI: 10.19110/geov.2026.6.4

The attempts made so far to quantify the value of the energy stored in the ball lightning have not been successful. Calculations based on the observed data or within the framework of various theoretical lightning models have not yielded generally accepted values. The estimates available in the literature are contradictory and range widely (from a few units to millions of joules). In this paper we calculate the energy content of ball lightning within the proposed quataronic model of its formation. Calculations show that the energy diversity of ball lightnings depends on the size of the structural units forming it. For example, the average value of the upper limit of the energy content of a ball lightning with a diameter of 20 cm, formed by quatarons of water with a radius in the range from 0.3 nm to 0.6 nm, is approximately 10 · 10³ J, the energy density is 5.66 · 10⁶ J/m³. The calculations suggest an interesting idea for a new architecture of ball lightning built from a multitude of individual small nanolightnings. At the same time, the minimum radius of nanolightnings is 3.6 nm (for a lightning consisting of charged quatarons with a radius of 0.3 nm), and the energy is 1.9 · 10^–15 J. Such nanostructure of a ball lightning ensures the equality of densities of lightning and the surrounding air necessary for its free movement in the atmosphere. The existence of nanolightnings is probably responsible for the extremely rare formation of visible-sized ball lightning.

Keywords: kvataron model of a ball lightning, energetics of a ball lightning, internal structure of a ball lightning, ball nanolightning

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DOI: 10.19110/geov.2026.6.5

The article discusses the composition and properties of different-aged landfill soils (2 and 20 years old) formed in the area of solid household waste storage. The landfill soil contains toxicants of classes 1–3, with a total contamination index of 98.1 for 2-year-old deposits and 10.8 for 20-year-old deposits.

When stored outdoors, the landfill soils are washed by precipitation and subjected to wind and water erosion. The proportion of water-soluble fraction in 2-year-old landfill soils (7.1%) and the mineralization of water extracts (2450 mg/L) are significantly higher than those of 20-year-old deposits (1.9 % and 260 mg/L). The content of chemical elements in water extracts of young landfill soil is higher than that of compacted soil by 1.5 to 15 times. Some elements are leached out of the landfill body during the aging process, while others are fixed in secondary mineral phases (oxides, hydroxides, sulfates, carbonates, phosphates, and chlorides).

In the waters of drainage channels, the content of toxicants exceeds the maximum permissible values by a factor of 3.6 to 2740. The water pollution index, calculated based on the highest permissible concentrations (Ti, Fe, Pb, Ni, Sb, Cr), is hundreds of times higher than the value for extremely dirty samples. Chemical elements are leached from the landfill body, accumulate in drainage channels, and can migrate into aquifers and enter final discharge water bodies.

Keywords: landfill soil from 2- and 20-year-old deposits, geochemical features, water-soluble fraction of landfill soil, drainage channel water

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