Yurij Vasil'chuk

Lomonosov Moscow State University | MSU · Faculty of Geography

We present the first direct dating by 14C-accelerator mass spectrometry of three Late Pleistocene syngenetic ice-wedges from the Seyaha cross-section. They are representative of permafrost with multistage ice-wedges from the North of Western Siberia. The most important result is the clear vertical age stratification of the ice, i.e. the old ice is...

The occurrence of well-preserved redeposited organic material is the main limitation for radiocarbon dating of syngenetic permafrost sediments. Only radiocarbon dating of (1) autochthonous organic remains or (2) a series of non-inverted radiocarbon dates, in the case of allochthonous organic material in permafrost thicknesses, is valid. An interpre...

Two exposures of unusual ice-wedge sediment complexes are described from the Upper Kolyma region. The sediment is peaty loam with a rock debris content of more than 30%. The oxygen isotope composition of the ice-wedges and radiocarbon age of the enclosing sediments allow one to reconstruct palaeo-facial and palaeo-climatic information. The oxygen i...

The cryostratigraphy of Holocene ice wedges is described from Western Siberia, Yakutia and the Trans-Baikal region. 14C dating and oxygen isotope determinations suggest that some of these wedges grew syngenetically during the Holocene climatic optimum. Inferred mean winter and mean January air temperatures for this period are presented. La cryostra...

Strategy for AMS14C dating of organic micro inclusions from syngenetic ice-wedge ice is considered. AMS14C dates are interpreted in terms of fictitious aging of ice-wedge and permafrost sediments due to high concentration of allochthonous organic material. The dating of organic material from small sample, gives the reliable 14C age. The 14C dates f...

Holocene ice wedges at 16 sites in the Northwestern Siberia were studied, the age of ice wedges was determined, and stable isotope data (δ18O and δ2Н values) for all studied ice wedges have been summarized. The δ2H–δ18O ratio and the dexc values for ice wedge ice indicate good preservation of the isotope signal of winter precipitation in ice, which...

Aufeis is one of the most dangerous natural phenomena. The negative impact of aufeis is determined by the unexpected flooding of the territory and subsequent freezing of water, the formation of ice barriers, the icing of underground structures and communications (mines, tunnels, culverts, and sewer wells), as well as the icing of roads and railways...

Accelerator mass spectrometry radiocarbon (AMS 14C) dating was used for determining the age of wedge ice. It has been found that between 11,270 and 6420 cal BP, or the Greenlandian and Northgrippian stages of the Holocene, ice wedges grew syngenetically in sandy deposits with gravel in the Chara River valley. The variations of δ18O values in the ic...

The Eastern Chukotka is considered a unique permafrost region where massive ice bodies are widespread. However, the origin and age of these ice formations are often discussed. The age of the massive ice of Chukotka was established for the first time using AMS 14 C dating. It was revealed that three massive ice bodies on the coast of Mechigmen Bay w...

To reveal variations in the iso topic composition of O and H in the atmospheric precipitation in Moscow and the processes influencing the isotope composition, all events of precipitation in 2017-2019 were sampled at the Meteorological Observatory of the Moscow State University: 158 samples in 2017, 119 samples in 2018 and 143 samples in 2019. The s...

The second decade and the first third of the third decade of the 21st century in yedoma research was characterized by a variety of high-precision measurements gas inclusions, molecular biomarkers and DNA. The purpose of this paper is to analyze the most notable publications of 2010-2023 devoted to radiocarbon dating and stable isotope studies of ye...

The work is aimed at determining the age of ice wedges, as well as at characterizing winter temperature fluctuations during the formation of the Yedoma based on the isotopic composition of ice wedges in the unique outcrop of the Batagay mega-slump. The researchers carried out a detailed sampling from the Upper Ice Wedge Complex of the Batagay Yedom...

For the first time AMS radiocarbon dating was used to date microinclusions of organic material extracted directly from Holocene syngenetic ice wedges in the European North of Russia on the coast of the Baydarata Bay near the Yarynskaya village, 500 m south of the mouth of the Ngarka-Tambyakha River (68°51′20.27″ N, 66°52′6.51″ E). Dated ice wedges...

For the first time, AMS radiocarbon dating was used to date microinclusions of organic material extracted directly from Holocene syngenetic ice wedges in the Noprthern European part of Russia, on the coast of Baydarata Bay near the village of Yarynskaya, 500 m south of the mouth of the Ngarka-Tambyakha River (68°51′20.27″ N, 66°52′6.51″ E). Dated i...

The palsa and lithalsa are reliable indicators of the presence of permafrost, especially on the its southern border. The subject of the study is the consideration of the C/N ratio in the peat of the palsa and the litter and humus horizon of the lithalsa as a criterion for the separation of the palsa and lithalsa. The palsa near the Yeletskaya villa...

Received July 3, 2023; revised September 4, 2023; accepted October 2, 2023The isotopic composition (δ18O values) of snow layers, constructing snow cover to the time of reaching maximum snow water equivalent (SWE), was compared with the isotopic content of snow precipitated over the whole the winter season 2018/19 on the territory of the Meteorologi...

The subject of the study is the content of iron compounds and their radial differentiation in the profiles of cryogenic soils of the Chara River valley (Transbaikalia). The studied soils belong to post-pyrogenic permafrost gleyzems, the depths of the seasonal active‐layer of these soils are from 34 to 44 cm. Macronutrient concentrations, with the e...

Supplement to submitted paper "Spatial-temporal variability of the δ18O values and the snow structure at the territory of the Meteorological Observatory of the Lomonosov Moscow State University"

The first decade of the 21st century in the study of yedoma marked by the widespread use of AMS radiocarbon dating on microinclusions extracted directly from the ice wedge. These studies, together with a detailed study of stable isotope composition, were carried out at Lomonosov Moscow State University (Yu. Vasil'chuk and A. Vasil'chuk) on yedoma s...

The subject of the study is the soil-geochemical features of cryogenic mid-taiga landscapes of the Vilyuy River valley in its middle course, located near Mahatta and the village of Kysyl-Syr of the Republic of Sakha (Yakutia). Morphological descriptions of soil profiles were compiled. Chemical and analytical laboratory work was carried out in order...

The subject of the study was the soil and geochemical features of southern tundra cryogenic landscapes on the Khanovei educational and scientific field site located nearby the eponymous settlement in the Vorkuta district, Komi Republic. Morphology of soil profiles were described according to the modern Russian soil classification system. Chemical a...

Yedoma ice complex sediments with large syngenetic ice wedges (IW) are usually observed in outcrops in river valleys on permafrost plains and on sea coasts and lake shores in the north of Siberia, Alaska, and Canada. Less frequently, they occur in mountainous and foothill regions of East Siberia, for example, in the Upper Kolyma Upland and in river...

The object of the study is the dispersed fractions of an aerosol substance in the snow cover. At the sampling sites located in the middle taiga zone within the Mezen-Vychegoda Plain on a high terrace in the Sysola river valley, 3 km west of the city of Syktyvkar, fresh snow and surface frost were sampled. The analysis of the ratios in the surface h...

The purpose of the paper is to establish the range of variability of mineralization and ionic composition of water-soluble salts in ice wedges of different ages near the Seyakha village (Eastern Yamal Peninsula) in outcrops of the river floodplain, Holocene peat bog and yedoma, as well as to establish the contribution of atmospheric nutrition of ic...

The study deals with comparative analysis of independent reconstructions of temperature regime during the cold period of the largest in the Russian Arctic Late Pleistocene glaciation (18–21 kyr BP), based on the data of isotopic analysis and the results of numerical modeling. The study used the data of numerical experiments of PMIP3 climatic models...

The subject of the study is the yedoma i.e. perennially frozen (permafrost) organic-bearing (>1–2% of Corg) and ice-rich (containing 50–90 vol. % of excess ice) silty and sandy loam and fine sand deposit of late Pleistocene age. Yedoma with multi-tiered syngenetic ice wedges (up to 15–20 meters high and up to 3.5 m wide) aged from 11.7 to 50 cal. c...

Ice wedges are considered as a paleoarchive of winter air temperatures as their stable isotope composition has been widely used to reconstruct winter climatic conditions in the Arctic regions. Ice wedge stable isotope records, obtained in recent decades for many Arctic permafrost areas of Russia and North America, demonstrate a clear shift from low...

The investigation is concerned with the Early Holocene syngenetic massive wedge ice exposed in the outcrop of a polygonal peatland in the upper part of the third marine terrace near Lorino settlement on the eastern coast of Chukotka. Based on the obtained radiocarbon dates of peat, it was found that the formation of a peatland in the area began abo...

The dating of microinclusions of organic material in a sample from the upper part of the Pleisto-cene syngenetic ice wedge, exposed in an outcrop of the Vilyui yedoma, located in the north of Yakutia, near the village of Kysyl-Syr (coordinates: 63°53′19″ N, 122°46′09″ E, height above sea level 100 m), was performed using accelerator mass spectromet...

The main purpose of the paper is to create an optimal strategy for field testing of wedge ice for isotope and radiocarbon analyses. The scientific significance of this task is the need for a detailed isotopic characterization of well-dated sections with ice wedges. The solution of this problem will allow us to obtain a complete isotopic and paleote...

The subject of the study are soils on the territory of the Khanovey educational field training site in the Vorkuta district of Komi Republic. Morphological descriptions of soil profiles and diagnostics and classification of soils in the modern Russian system were carried out. Laboratory analysis was carried out to determine soil properties: moistur...

The object of the study are the cryogenic soils located within the Chara depression. We attributed soils in a post-pyrogenic sparse larch forest on the terrace of the Chara River, to the type of gleyzems (Gleysols), subtypes - permafrost cryogenically ferruginized cryoturbated and permafrost cryogenically ferruginized post-pyrogenic. The field diag...

The object of study is ice wedges at 10 sites in the lower Kolyma River. The Holocene age of ice wedges is determined on the basis of radiocarbon dating of the enclosing sediments and location of ice wedges in alases, floodplains and lacustrine-paludal basins. The analysis of radiocarbon dates has shown that formation of alases with ice wedges bega...

The dating of microinclusions of organic material in a sample from the upper part of the Pleistocene syngenetic ice wedge, exposed in an outcrop of the Vilyui yedoma, located in the north of Yakutia, near the village of Kysyl-Syr (coordinates: 63°53'19'' N, 122°46'09'' E, height above sea level 100 m), was performed using accelerator mass spectrome...

The recently formed Batagay mega-thaw slump exposes permafrost deposits to a depth of up to 92 m below ground surface and provides insight into the climate record in the region of the most severe continental climate in the Northern Hemisphere. Radiocarbon and stable isotope data were obtained to verify the age of ice wedges in the Batagay yedoma (u...

The content of carbon and nitrogen, as well as the carbon-to-nitrogen ratio in the genetic horizons of the soil cover, yedoma deposits and in organic residues of syngenetic ice wedges (IW) of the upper IW complex of the Batagay megaslump were studied. The studied soils belong to the silty-loam Spodic Cryosol (Dystric,Humic) and post-pyrogenic Spodi...

The correlation of the radiocarbon ages of yedoma and ice wedges is made, as well as paleotemperature interpretation of the isotopic composition of ice wedges, for the four most informative sections of yedoma located in the lower reaches of the Kolyma River, as follows: Bison, Zelyony Mys, Plakhinskii Yar, Duvanny Yar.

The ionic composition of ice, and concentration of major- and trace elements in soil inclusions in ice wedges and host sediments of the Batagay Yedoma are studied. The mineralization of Late Pleistocene ice wedges ranged from 66.56 to 424.8 mg/L, from ultra-fresh to desalinated; the ice is bicarbonate-calcium and it corresponds to snow formed under...

The possibilities of using the isotopic signature of ice to determine the source of water and the conditions for the formation of massive ice are considered, a comparison with the isotopic characteristics of possible sources of water is made, and the issues of establishing the genesis of the complex massive ice bodies of Yamal Peninsula are touched...

The object of the study is the isotope composition of three aufeis (icing) in the Viluy River basin. Two of the three tested icing were located in the wide valleys of the streams-tributaries of the Viluy River, one on the flat bottom of the thermosuffusion sinkholes. The areas of studied icings did not exceed 30 sq. m., their thickness ranges from...

Yedoma sediments with thick syngenetic ice wedges have been studied on the Yamal Peninsula, northwestern Siberia. The accumulation of yedoma strata occurred under alternating subaqueous-subaerial conditions, and three tiers of ice wedge were formed mainly on subaerial stages. The ice wedges and enclosing sediments were dated, revealing that the ice...

Palsas and peat plateaus have an important role in the bio- and geodiversity of Northern environments. The peat of the palsa is an archive of geochemical and biochemical conditions of high quality. The palsa peat bog of Eletsky was studied in the north-east of the Bolshezemelskaya tundra (67°16′ N, 63°39′ E). Palsa of 1.5 to 4 m height were studied...

Temporal full text access: https://rdcu.be/cFpiI Event-based sampling of isotopes in precipitation (δ 18 O and δ 2 H) was done in a large European Moscow city (Russian Federation) to understand modern climate variability and isotopic sensitivity to air temperature and precipitation amount. A strong seasonality of δ 18 O and δ 2 H values, with a ma...

When studying landslide processes, researchers pay great attention not only to the geometric dimensions of landslide bodies, displacement mechanisms, geomorphological features and reasons for their activation, but also to the time of their activation. The data obtained by radiocarbon dating of organic material selected from various geomorphological...

The features of the Late Pleistocene ice wedges in the outcrop of the Zelyony Mys Yedoma located on the right bank of the Lower Kolyma River are considered. The oxygen isotope composition of ice wedges, radiocarbon age, and hydrochemical characteristics have been studied. Stable oxygen isotopes provide the main basis for reconstructing the mean Jan...

Biotracers marking the geologic history and permafrost evolution in Central Yakutia, including Yedoma Ice Complex (IC) deposits, were identified in a multiproxy analysis of water chemistry, isotopic signatures, and microbial datasets. The key study sections were the Mamontova Gora and Syrdakh exposures, well covered in the literature. In the Mamont...

The subject of research is the ratio of isotopic parameters δ2H-δ18О in ice wedges. The authors considered such a parameter as the slope of the δ2H-δ18O co-isotope line in ice wedges. Location of isotope values for ice wedge ice near GMWL or LMWL and δ2H-δ18O co-isotope line slope close to 8 suggests that the ice wedge was formed from precipitation...

Study objects in this paper were cryogenic soils of the territory, located in Central Yakutia, in the middle Vilyuy river near Makhatta tukulan, where landscapes are middle-taiga larchlands. In July 2021 12 soil pits were placed on right and left Vilyuy river banks and these soils were Fluvisols (Arenic) and Orthofluvic Fluvisols (Loamic, Arenic, H...

A relatively simple method is proposed for taking into account the effect of self-diffusion processes on the redistribution of the paleoisotopic composition, which makes it possible to quickly, simply, and with acceptable accuracy estimate the change in delta18О and delta2H values in ice veins at different time intervals of the Quaternary stage (10...

The subject of this research is the syngenetic ice wedges stripped in the Batagaika crater (67°34 '49" N, 134°46 ' 19 " E), located 10 km southeast of the Batagay settlement. The assessment of macroelement composition of ice was conducted using “Stayer” ion chromatograph (Russia), the chloride ion detection limit is 0.02 mg/l. The article examines...

Ice wedges in the Holocene deposits of alases and floodplains have been studied in the Kolyma Lowland region. Most ice wedges have been found within alases dated to between 11 and 4.2 cal kyr BP, corresponding to the Greenlandian and Northgrippian stages of the Holocene. This study confirms that the greatest intensity of ice wedge growth occurred d...

The study subject is the content of trace and major elements in the Late Pleistocene syngenetic ice wedges of the Seyakha yedoma, east of Yamal Peninsula (70°9'27.88 "N, 72° 34'8.31" E). The content of 70 chemical elements in ice wedges was determined by atomic emission spectrometry and inductively coupled plasma mass spectrometry In samples of ice...

The sections of the high floodplain of the Seyakha (Zelyonaya) River and sections of Holocene peat bogs with ice wedges. Palynospectra from sediments and ice wedges of the high floodplain are characterized by rhythmic fluctuations of the components characteristic of floodplain facies. The absence of larch trunks can be caused by fires, traces of wh...

We studied syngenetic ice wedges the ionic composition of ice, the content of suspended and dissolved trace- and major elements in ice in the outcrop of Batagay megaslump (coordinates 67°34'49'' N, 134°46'19'' E), situated 10 km to the south east of the Batagay settlement in Verkhoyansky District of the Yakutia (Sakha) Republic. Ice samples were ta...

The massive ice (MI) bodies are widespread phenomena on Chukotka coastal plains. Although they have been studying since 1930s, stable isotope method was applied for the ice beds quite recently. In this study cryostratigraphy and stable oxygen and hydrogen isotope composition of MI bodies on the extreme North-Eastern Chukotka (near Lavrentiya settle...

The content of polycyclic aromatic hydrocarbons (PAHs) and carbon isotope composition in the peat of a palsa near Eletsky settlement, Vorkuta urban district, Komi Republic are analyzed. The carbon isotope composition of peat varies from -28.05 to -30.05‰ (average -29.15‰). The total PAH content varies from 11 to 360 ppb, with an average of 63 ppb a...

Pingos are indicators of modern and past conditions of permafrost. In total, 1,620 pingos have been identified on the Yamal and Gydan peninsulas in western Siberia. The main purpose of this study is to consider the distribution of stable isotopes in pingo ice cores formed under conditions of open and closed systems. Two pingos from ice cores of dif...

The research of peat and peat-mineral frost mounds was carried out in September – October 2021 in the northeast of Yamal Peninsula, 50 km north of the village of Tambey. Morphometric data was acquired om ten frost mounds. The wells with the depth of up to 1 m were drilled in 4 out of 10 mounds using electric drill, which outcropped the upper horizo...

The object of this research is the reconstruction of the climatic conditions of the Late Pleistocene summer seasons based on the pollen spectra of syngenetic ice wedges and inclosing Yedoma deposits. For quantitative assessment of summer temperatures and phenological relationships, the author applies the total annual thaw index, since namely the su...

This article presents the results of the first comprehensive study of permafrost and frost mounds in the Sentsa River valley on the Oka Plateau (Eastern Sayan Ridge). The lacustrine‐alluvial deposits are represented by clayey silts and silts with visible ice contents up to 90%. Ground ice mainly comprises bicarbonate calcium or bicarbonate magnesiu...

The pollen characteristics of the Zelyony Mys yedoma record cyclical changes in vegetation cover, both on a local and regional scale. There are three local pollen zones such as: Varia +Artemisia, Varia + Selaginella sibirica, and Pinus + Betula sect. Nanae. Pollen spectra reflect open landscapes of mosaic hypo-arctic tundra. Some local pollen zones...

The subject of the study is the analysis of the ratio of carbon (C) and nitrogen(N) and δ13C values in polygonal landscapes on the coast of Onemen Bay, near the Anadyr city. The maximum values of carbon (59.09%) and nitrogen (2.18%) in peatlands were obtained at a depth of 1.1 m in a narrow peat vein. The values of δ13C in the peatlands on the coas...

The subject of this research is the Late Pleistocene and Holocene ice wedges exposed near Chersky settlement, lower Kolyma River, and in the yedoma strata of the Stanchikovsky Yar on the Maly Anyuy River. In the yedoma of the Stanchikovsky Yar, multi-tiered syngenetic ice wedges were exposed at different levels – from 10 to 35 m above river level....

Pollen and spores collected from massive ice bodies in northwest Siberia were studied with the aim to provide a cryogenic indication of their origin. We discuss perennial massive ice, which may occur as lenses, layers, or irregular masses in the frozen ground and may be buried or intrasedimental. Pollen assemblages in massive ice deposits of Holoce...

The isotope composition and hydrochemical properties of the Late Pleistocene ice wedges in the outcrop of fl at side of Kular Ridge located in the western part of Yana-Indigirka Lowland have been analyzed. It has been established that variations of the δ 18 О values in the ice wedges (varying-32.6 ‰ to-31.0 ‰) do not exceed 1.6 ‰. The mean winter a...

The structure and composition of Late Pleistocene ice wedges in the ice complex outcropping onto the gently sloping Kular ridge in the western Yana-Indigirka Lowland are considered. Ice wedges are dated 47–42 and 37–32 kyr BP. Over this time, relatively high temperatures of the growing season were recorded twice. Their rise appeared to be suffi cie...

Isotopic characteristics of ice cores of palsa are considered. The distribution of the values of δ18O, δ2H, dexc and ratios δ18O–δ2H within the palza ice lense is associated with freezing in a closed or open system, and this allows finding the source of water for the ice formation. The use of computational modeling of the distribution of the values...

We studied the ionic composition of ice, the content of suspended and dissolved trace- and major elements in ice, values of δ¹³С, and the composition of PAHs of inclusions in the Late Pleistocene syngenetic ice wedges of the Batagay yedoma. For the first time, the complex geochemical study of Batagay magaslump was carried out. The ice of the upper...

The structure and composition of Late Pleistocene ice wedges in the ice complex outcropping onto gently sloping Kular ridge in the western Yana-Indigirka lowland are considered. Ice wedges are dated 47–42 and 37–32 kyr BP. Over this time, relatively high temperatures of the growing season were recorded twice. Their rise appeared to be suffi cient f...

The isotopic composition and hydro chemical properties of the Late Pleistocene ice wedges in the outcrop of flat side of Kular Ridge located in the western part of the Yana-Indigirka Lowland have been analyzed. It has been established that variations of δ18О values in Late Pleistocene ice wedges do not exceed 1.6 ‰ (from –32.6 ‰ to –31.0 ‰). The me...

This article demonstrates the evolution of representation on syngenetic formation of frozen strata set by Lopatin, Abolin, Leffingwell and Nekipelov. It is underlined that the theory of syngenesis is substantiated by the works of Gallwitz, Popov and Katasonov. It is mentioned that Dostovalov proposed a method for approximate determination of the ag...

The object of research is the Holocene massive ice veins on the Eastern coast of the Daurkin Peninsula, the easternmost part of the Chukotka. Peat bogs with ice veins occur on the surface of marine terraces (near Uelen and Lorino settlements) and on flood plain of the Koolen’ Lake; the thickness of peat varies from 0.7 to 2.5 m. Radiocarbon dating...

This study aims to analyze the stable isotope composition of the snow cover of the Elbrus Mountain-the highest mountain in Europe. Snow sampled in the middle accumulation. Snow sampled at the south slope of Mt. Elbrus at different elevations, and the total altitude range is approximately 1700 m. A significant altitude effect in fresh snow precipita...

Accelerator mass spectrometry dating of organic microinclusions was performed on eight samples from the lower part of the thick Pleistocene syngenetic ice wedges exposed in the Batagay mega-slump in northern Yakutia, the upper reaches of the Yana River (67.58°N, 134.77°E). Radiocarbon dating suggests that ice wedge growth took place between 38 120...

The research is conducted on the Holocene ice wedges exposed in the outcrop of the first marine terrace near the town of Anadyr, on the east of the Chukchi Peninsula, on the coast of Onemen Bay. Polygonal Relief is clearly traced on the surface of the first sea terrace in the area of explorations, the size of the polygons is about 8x12 m. In the ex...

The subject of this article is the pollen spectra of the samples from the surface of Romantic's Glacier, located in the Polar Urals in the Rai-Iz mountain range, as well as generalization of the results of published studies dedicated to glaciers of the Urals. The author also examines the pollen spectra of massive ice, which can be attributed to ice...

The subject of this research is the soils and soil-geochemical catenae in the area of Yeletsky settlement, located in the northeast of the Komi Republic. Catena were deposited on the mound covered with moss-shrub tundra transect from the interfluve of Usa and Yelets Rivers to a lacustrine depression, complicated by arching permafrost mounds. Within...

Early Holocene winter air temperatures have been reconstructed for the north‐eastern part of the East European Plain using stable isotope (δ18O and δ2H) records of syngenetic ice wedges. We show that ice wedges here actively grew synchronously with accumulation of peatlands in bogged and forested depressions between 10 and 8 cal ka BP, correspondin...

The carbon isotope signatures and the content of polycyclic aromatic hydrocarbons (PAHs) in the pedogenic material of inclusions in ice wedges of the Batagay yedoma (Yakutia) are studied. The mean concentration of 11 PAHs is 170 ppb (minimum, 7 ppb and maximum, 430 ppb) and the mean δ 13 С value in soil lipids is -29‰ (minimum, -31.1‰ and maximum,...

The subject of this research is the soil and catena soils in the area of Batagaika crater located in Verkhoyansk District of Northern Yakutia. Soils are usually represented by Cryosols Gleyic and Podzols Entic, which are formed on eluvial and eluvial-deluvial deposits under larch forests. Exploration of soils was carried out in 2017, 2018 and 2019....

Polycyclic aromatic hydrocarbons (PAHs) are the ubiquitous organic pollutants. They are formed as a result of incomplete oxidation of organic substance, for example, technogenic fuel combustion, heating system, wildfires, volcanism, and decomposition of organic residues. Special attention is given to pyrogenic factor of the formation of PAHs in soi...

Massive ice, located at different depths in the permafrost of the Kharasavey gas condensate field, many massive ice formations occurred in different forms such as layers, lenses and laccoliths. Massive ice near the Kharasavey village was repeatedly studied and tested in detail, and ice formations were found both within the first sea terrace and wit...

The subject of this study is the ratio of carbon and nitrogen content in the soil of the lithalsa landscape in the Sentsa River valley. The focus is on the spatial distribution of C/N ratio in the genetic soil horizons: humus (A), illuvial (B), the parent rock(C), as well as in the buried peat horizon (T). The carbon and nitrogen content is analyze...

Massive ice is widespread on the territory of modern of Eurasian permafrost area: in the north of Western Siberia, Taimyr, Chukotka, and Arctic islands. Their thickness reaches 45-50m. The origin of massive ice is difficult to define due to the equifinality of such two different processes as intrasedimental freezing and formation of glacial ice. In...

This paper reports on the nature and history of the mineral-rich frost heave mounds-lithalsas-developed on the first terrace of the Sentsa River in Okinsky District of Buryatia. An ice core of the lithalsa was exposed by drilling of a 20-m borehole. The most typical feature of the isotopic diagrams, which we obtained for the ice core, is their cycl...

A review of published isotopic data on Yamal Peninsula massive ice near Marre-Sale polar station showed that there is a number of difficulties in indicating the genesis of the ice formation. The published data of δ18О and δ2Н of sea water in the Yamal Peninsula coast are disconnect to idea of participation of this sea water as a water source for ic...

The lithalsa, located on the first terrace of the Sentsa River in Okinsky district of the Republic of Buryatia, were studied. The most typical features of isotopic diagrams, obtained from the ice core from the 20-meter borehole, is their stage structure: three isotope minima at depths of approximately: 3-5, 9-12, and 18-21 m are separated by two di...

Microinclusions of organic matter were dated using acceleration mass spectrometry in seven samples from the upper part of the thick Pleistocene syngenetic ice wedges uncovered in the outcrop of the Batagay yedoma located in northern Yakutia along the upper Yana River (67,58 N, 134,77 E). The dated fragment of ice wedge was formed within 22 760-20 0...

Microinclusions of organic matter were dated using acceleration mass spectrometry in seven samples from the upper part of the thick Pleistocene syngenetic ices uncovered in the outcrop of the Batagay yedoma located in northern Yakutia along the upper Yana River (67.58° N, 134.77° E). The dated fragment veins were formed within 22760–20010 radiocarb...

Microinclusions of organic matter were dated using acceleration mass spectrometry in seven samples from the upper part of the thick Pleistocene syngenetic ices uncovered in the outcrop of the Batagay yedoma located in northern Yakutia along the upper Yana River (67.58 °N, 134.77 °E). The dated fragment veins were formed within 22760–20010 radiocarb...

Late Pleistocene and Holocene winter air temperatures in Kotelny Island, northeastern Russian Arctic, have been reconstructed using oxygen isotope compositions of ice wedges and correlated with evidence of Late Pleistocene and Holocene climate variations inferred from pollen data. The δ18О values range exceeds 6 ‰ in Late Pleistocene ice wedges but...

This study presents a dataset on long-term multidisciplinary glaciological, hydrological, and meteorological observations and isotope sampling in a sparsely monitored alpine zone of the North Caucasus in the Djankuat research basin. The Djankuat glacier, which is the largest in the basin, was chosen as representative of the central North Caucasus d...

The vertical isotopic profile of the ice core of a Messoyakha-1 bulgunniakh (pingo)-was obtained. The pingo is situated at 68°30′32″ N, 79°59′53″ E, in the southern part of the Gydan Peninsula within the Middle Messoyakha swell. No significant variations were registered in the isotopic composition of the pingo ice core: δ18О varied from -14.98 to -...

The vertical isotopic profile of the pingo Messoyakha-1 (coordinates: 68°30′32″ N, 79°59′53″ E) ice core, obtained in the south of the Gydan Peninsula in the Middle Messoyakha swell. There is no significant variations of the isotopic composition of pingo ice core: δ18О values vary from -14.98 to -16.60‰, δ2Н values vary from -117.9 to -12.8. This s...