Current Understanding of the Geochemistry of Organic Matter and Naphthydes in Mesozoic Rocks of Arctic Western Siberia

The paper presents a study of the structure and reservoir properties of rocks of the Bazhenov formation in the sections of three wells located in different structural zones of the Priobskoye field. It is shown that the porosity of the samples varies from 0.02% to 6.95%, the absolute gas permeability of the rocks reaches 1.364 mD. It is established that the collectors in the Bazhenov formation are confined to silicite-radiolarites (possessing porosity associated with the leaching of radiolarian shells) and kerogen-clay-siliceous rock and kerogen-clay silicite (porosity is associated with the release of space between the clay-siliceous matrix and kerogen by ripening organic matter). The following secondary processes influenced the formation of voids in these lithotypes: recrystallization of radiolarians and local warming up.

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CERAMICS OF THE PESTRYAKOVO LAKE SETTLEMENT (SOUTH OF WESTERN SIBERIA)

Preservation and study of the cultural heritage of the Altai Territory ◽

10.14258/2411-1503.2021.27.32 ◽

2021 ◽

Vol 27 ◽

pp. 205-212

Author(s):

KIRYUSHIN K. ◽

◽

KIRYUSHIN Yu. ◽

Keyword(s):

Organic Matter ◽

Bronze Age ◽

Middle Ages ◽

Iron Age ◽

Western Siberia ◽

Early Iron Age ◽

Late Bronze Age ◽

The South ◽

Animal Hair ◽

The Middle Ages

The article is devoted to the publication of finds of fragments of ceramic dishes discovered at the settlement of Pestryakovo Lake (Zavyalovsky district of Altai Territory). A group of ceramics which belongs to the early Iron Age and the Middle Ages, is pointed out. Single fragments find analogies in the materials of the sites of the Early and Late Bronze Age. The ceramic collection of the Pestryakovo Lake settlement includes groups of ceramics that belong to the Neolithic or Eneolithic. These are fragments of vessels ornamented with prints of a “string”, pricks, imprints of a short comb stamp, a dingle-dingle stamping. Linear-pricked and receding-pricked ceramics are quite informative. On the outer and inner surfaces, as well as in the fractures, traces of burnt-out organic matter (animal hair) are recorded. Such ceramics are widely represented in the south of Western Siberia and are associated with various settlement and burial complexes from the Ob to the Irtysh and various cultural formations of the Neolithic and Eneolithic. Keywords: settlement, ceramics, ornamentation technique, comparative typological analysis, neolithic, eneolithic

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Current Understanding of the Use of Alkaline Extractions of Soils to Investigate Soil Organic Matter and Environmental Processes

Journal of Environmental Quality ◽

10.2134/jeq2019.08.0292 ◽

2019 ◽

Vol 48 (6) ◽

pp. 1561-1564 ◽

Cited By ~ 1

Author(s):

Tsutomu Ohno ◽

Nancy J. Hess ◽

Nikolla P. Qafoku

Keyword(s):

Organic Matter ◽

Soil Organic Matter ◽

Current Understanding ◽

Environmental Processes

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Distribution Profile of Chemical Elements during the Last 13 Thousand Years from the Sediments of Maloye Yarovoe Lake (Western Siberia, Russia)

Water ◽

10.3390/w12113001 ◽

2020 ◽

Vol 12 (11) ◽

pp. 3001

Author(s):

Marina Kolpakova ◽

Olga Gaskova ◽

Svetlana Borzenko ◽

Sergey Krivonogov ◽

Olga Naymushina ◽

...

Keyword(s):

Organic Matter ◽

Western Siberia ◽

Chemical Elements ◽

Water Evaporation ◽

Organic Matter Degradation ◽

Distribution Profile ◽

Rock Interaction ◽

Radiocarbon Dates ◽

Kulunda Steppe ◽

Lake Stage

The article presents the studies on understanding the chemical evolution of Maloye Yarovoe lake that is located in the semi-arid landscape of and represent the most widespread chemical type of saline lake (Cl-Na) on the territory of Kulunda steppe (south of Western Siberia). The lake has gone through several changes in its state which are well represented in its sediments: section 1 (4.52–4.97 m) represents the subbase; section 2 (3.0–4.57 m) corresponds to a “shallow lake” stage and contains two sublayers; section 3 (0–2.25 m) illustrates an increase in erosion of the shoreline and corresponds to a “deep lake” stage. The extrapolation of radiocarbon dates suggests that the most significant changes in the state of the lake occurred at about 6.5–7.1 ka BP (transition from a small lake to a large one with intensified coastal erosion) and at about 5.69 and 3.5 ka BP (increase in the organic component). The results of sequential extraction of elements correspond to chemical changes occurred in a certain time of the lake state by changing in their distribution level and fraction type along the core. The results of lake water evaporation and organic matter degradation modelling performed in Phreeqc for oxic and anoxic condition showed the following stages of chemical divides could be expected in case of further lakes desiccation: Halite—Epsomite—Bischofite/Carnalite with possibility of Nahcolite precipitation in carbonate enriched periods (summer and autumn periods of organic matter degradation). Water–rock interaction processes in combination with biogeochemical reactions affect drastically not only the migration features of elements in water and sediments, but also the type of mineral crystallization in lake sediments.

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Composition and sources of dissolved organic matter of bog waters in the Southern Taiga of Western Siberia

10.1063/1.5083514 ◽

2018 ◽

Author(s):

O. V. Serebrennikova ◽

I. V. Russkikh ◽

E. B. Strel’nikova ◽

Y. A. Kharanzhevskaya ◽

E. S. Voistinova

Keyword(s):

Organic Matter ◽

Dissolved Organic Matter ◽

Western Siberia ◽

Southern Taiga ◽

Bog Waters

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Organic matter mineralization and trace element post-depositional redistribution in Western Siberia thermokarst lake sediments

Biogeosciences ◽

10.5194/bg-8-3341-2011 ◽

2011 ◽

Vol 8 (11) ◽

pp. 3341-3358 ◽

Cited By ~ 48

Author(s):

S. Audry ◽

O. S. Pokrovsky ◽

L. S. Shirokova ◽

S. N. Kirpotin ◽

B. Dupré

Keyword(s):

Trace Elements ◽

Organic Matter ◽

Organic Carbon ◽

Lake Sediments ◽

Water Column ◽

Western Siberia ◽

Ecosystem Development ◽

Thermokarst Lake ◽

Fe And Mn ◽

The Impact

Abstract. This study reports the very first results on high-resolution sampling of sediments and their porewaters from three thermokarst (thaw) lakes representing different stages of ecosystem development located within the Nadym-Pur interfluve of the Western Siberia plain. Up to present time, the lake sediments of this and other permafrost-affected regions remain unexplored regarding their biogeochemical behavior. The aim of this study was to (i) document the early diagenesic processes in order to assess their impact on the organic carbon stored in the underlying permafrost, and (ii) characterize the post-depositional redistribution of trace elements and their impact on the water column. The estimated organic carbon (OC) stock in thermokarst lake sediments of 14 ± 2 kg m−2 is low compared to that reported for peat soils from the same region and denotes intense organic matter (OM) mineralization. Mineralization of OM in the thermokarst lake sediments proceeds under anoxic conditions in all the three lakes. In the course of the lake development, a shift in mineralization pathways from nitrate and sulfate to Fe- and Mn-oxyhydroxides as the main terminal electron acceptors in the early diagenetic reactions was suggested. This shift was likely promoted by the diagenetic consumption of nitrate and sulfate and their gradual depletion in the water column due to progressively decreasing frozen peat lixiviation occurring at the lake's borders. Trace elements were mobilized from host phases (OM and Fe- and Mn-oxyhydroxides) and partly sequestered in the sediment in the form of authigenic Fe-sulfides. Arsenic and Sb cycling was also closely linked to that of OM and Fe- and Mn-oxyhydroxides. Shallow diagenetic enrichment of particulate Sb was observed in the less mature stages. As a result of authigenic sulfide precipitation, the sediments of the early stage of ecosystem development were a sink for water column Cu, Zn, Cd, Pb and Sb. In contrast, at all stages of ecosystem development, the sediments were a source of dissolved Co, Ni and As to the water column. However, the concentrations of these trace elements remained low in the bottom waters, indicating that sorption processes on Fe-bounding particles and/or large-size organo-mineral colloids could mitigate the impact of post-depositional redistribution of toxic elements on the water column.

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Peculiarities of sedimentation of organic matter in rocks of the Bazhenovskaya Suite (Western Siberia): Evidence from distribution of hydrocarbons-biomarkers

Doklady Earth Sciences ◽

10.1134/s1028334x12040071 ◽

2012 ◽

Vol 443 (2) ◽

pp. 471-474

Author(s):

V. N. Melenevskii ◽

V. A. Kashirtsev

Keyword(s):

Organic Matter ◽

Western Siberia

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Stability and biodegradability of organic matter from Arctic soils of Western Siberia: insights from <sup>13</sup>C-NMR spectroscopy and elemental analysis

Solid Earth ◽

10.5194/se-7-153-2016 ◽

2016 ◽

Vol 7 (1) ◽

pp. 153-165 ◽

Cited By ~ 16

Author(s):

E. Ejarque ◽

E. Abakumov

Keyword(s):

Organic Matter ◽

Nmr Spectroscopy ◽

Climate Warming ◽

Western Siberia ◽

Total Carbon ◽

The Arctic ◽

Total Carbon Content ◽

Ambient Temperatures ◽

Arctic Soils ◽

Spatial Coverage

Abstract. Arctic soils contain large amounts of organic matter which, globally, exceed the amount of carbon stored in vegetation biomass and in the atmosphere. Recent studies emphasise the potential sensitivity for this soil organic matter (SOM) to be mineralised when faced with increasing ambient temperatures. In order to better refine the predictions about the response of SOM to climate warming, there is a need to increase the spatial coverage of empirical data on SOM quantity and quality in the Arctic area. This study provides, for the first time, a characterisation of SOM from the Gydan Peninsula in the Yamal Region, Western Siberia, Russia. On the one hand, soil humic acids and their humification state were characterised by measuring the elemental composition and diversity of functional groups using solid-state 13C-nuclear magnetic resonance (NMR) spectroscopy. Also, the total mineralisable carbon was measured. Our results indicate that there is a predominance of aliphatic carbon structures, with a minimal variation of their functional-group composition both regionally and within soil depth. This vertical homogeneity and low level of aromaticity reflects the accumulation in soil of lowly decomposed organic matter due to cold temperatures. Mineralisation rates were found to be independent of SOM quality, and to be mainly explained solely by the total carbon content. Overall, our results provide further evidence on the sensitivity that the soils of Western Siberia may have to increasing ambient temperatures and highlight the important role that this region can play in the global carbon balance under the effects of climate warming.

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