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

Water ◽  
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.

scholarly journals EXPERIENCE IN COMPREHENSIVE ANALYSIS OF THE RADIOCARBON DATING RESULTS AND THE PHYSICAL-CHEMICAL STUDIES OF TWO VESSELS OF THE NETWORK POTTERY CULTURE FROM PESOCHNOYE

2021 ◽  
pp. 25-45
Author(s):  
К. В. Воронин
Keyword(s):  
Organic Matter ◽  
Radiocarbon Dating ◽  
Chemical Elements ◽  
Water Reservoir ◽  
Natural Material ◽  
Age Difference ◽  
Radiocarbon Dates ◽  
Water Origin ◽  
Chemical Studies ◽  
Clay Body

При радиоуглеродном датировании по формовочной массе и нагару с поверхности двух сосудов культуры сетчатой керамики с поселения Песочное 1 на озере Неро полученные даты оказались в среднем на ~ 500-700 лет старше радиоуглеродных дат образцов культурного слоя, в котором они были найдены. Причиной мог быть пресноводный резервуарный эффект, обусловленный присутствием сформировавшейся в воде органики. Его проявление можно расценивать как индикатор присутствия происходящего из водной среды органического материала в составе компонентов формовочной массы исследуемых сосудов. В окрестностях поселения Песочное 1 единственным природным материалом, содержащим органику водного происхождения, соотносимого с формовочной массой, является сапропель из озера Неро. Для определения сходств и различий в элементном и минеральном составе методами SEM-/EDS- и XRD-анализов были изучены образцы керамики каждого сосуда и образец сапропеля из озера. Установлено, что компонентами формовочной массы являются иллитовая глина с полевыми шпатами и кварцем в виде частиц песка, сапропель и костная мука. Возможность получения радиоуглеродных дат по формовочной массе, отсутствие в ней химических элементов, свидетельствующих о наличии нередуцированных органических веществ, присутствие иллита показывают, что обжиг сосудов был произведен в интервале примерно от 400 до 800 °С. The article is devoted to the analysis of clay paste and burnt crust adhering to the surface of two vessels attributed to the «network» pottery culture (pottery with textile imprints) from the Pesochnoye 1 settlement on Lake Nero. The radiocarbon dating of these samples shows that on average the dates obtained are older than the radiocarbon dates of the samples from the occupation layer where the vessels were found by ~ 500700 years. The age difference is probably caused by the fresh water reservoir effect related to presence of organic matter in the water and presence of organic matter from water in the composition of clay paste used to make the studied vessels. Sapropel from Lake Nero is the only natural material in the Pesochnoye 1 vicinities which contains organic matter of water origin comparable with the clay used for the vessels making. To determine similarities and differences in the elemental and mineral compositions by the SEM/EDS and the XRD analyses, ceramic samples from each vessel and a gyttja clay sample from the lake were examined. It was found that sapropel tempered with feld spar and quartz sand, sapropel and bone flour were mixed in the clay body. Radiocarbon dates that can be obtained for clay, absence of chemical elements that would demonstrate presence of unreduced organic matter, presence of illite clay imply that the firing temperature fell within ~ 400-800 °С.

scholarly journals Water–rock interaction within the oligotrophic peat bog (part of the Vasyugan Swamp, Western Siberia)

2019 ◽  
Vol 98 ◽  
pp. 01045
Author(s):  
Oleg Savichev ◽  
Aleksey Mazurov ◽  
Maxim Rudmin ◽  
Evgeniya Soldatova
Keyword(s):  
Western Siberia ◽  
Chemical Elements ◽  
Peat Deposit ◽  
Peat Bog ◽  
Bottom Part ◽  
Rock Interaction ◽  
Geochemical Conditions ◽  
Diffusion Transfer ◽  
And Diffusion ◽  
Water Rock Interaction

Geochemical conditions of the formation of various minerals were studied within the oligotrophic pine-shrub and sphagnum peat bog. It was shown that at least two complex barriers function within the peat deposit. These barriers correspond to the changes in the advective and diffusion transfer of substances and promote the immobilization of Fe and a number of other chemical elements. The upper complex geochemical (redox, sulfide and sorption) barrier occurs approximately at the depths of 0.40 to 1.25 m. The lower complex geochemical (alkaline and sorption) and mechanical barriers are located at the bottom part of the peat deposit (the depth of 2.25–2.50 m).

The structure of the pore volume of the reservoir intervals of the Bazhenov formation of the Priobskoye field of Western Siberia

2019 ◽  
pp. 39-45
Author(s):  
A. S. Roslyakova ◽  
A. G. Kalmykov ◽  
G. A. Kalmykov ◽  
R. A. Khamidullin ◽  
N. I. Korobova ◽  
...  
Keyword(s):  
Organic Matter ◽  
Pore Volume ◽  
Western Siberia ◽  
Gas Permeability ◽  
Reservoir Properties ◽  
Bazhenov Formation ◽  
Siliceous Rock ◽  
Local Warming ◽  
The Absolute ◽  
Structural Zones

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.

The geosolitonic concept of high output hydrocarbon deposits formation

2021 ◽  
pp. 13-22
Author(s):  
R. M. Bembel ◽  
S. R. Bembel ◽  
M. I. Zaboeva ◽  
E. E. Levitina
Keyword(s):  
Western Siberia ◽  
Oil And Gas ◽  
Chemical Elements ◽  
Seismic Exploration ◽  
Oil And Gas Fields ◽  
Recoverable Reserves ◽  
Production Wells ◽  
Cumulative Production ◽  
Gas Fields ◽  
Hydrocarbon Deposits

Based on the well-known results of studies of the ether-geosoliton concept of the growing Earth, the article presents the conclusions that made it possible to propose a model of thermonuclear synthesis of chemical elements that form renewable reserves of developed oil and gas fields. It was revealed that local zones of abnormally high production rates of production wells and, accordingly, large cumulative production at developed fields in Western Siberia are due to the restoration of recoverable reserves due to geosoliton degassing. Therefore, when interpreting the results of geological and geophysical studies, it is necessary to pay attention to the identified geosoliton degassing channels, since in the works of R. M. Bembel and others found that they contributed to the formation of a number of hydrocarbon deposits in Western Siberia. When interpreting the results of geological-geophysical and physicochemical studies of the fields being developed, it is recommended to study the data of the ring high-resolution seismic exploration technology in order to identify unique areas of renewable reserves, which can significantly increase the component yield of hydrocarbon deposits.

scholarly journals Timescales for the development of methanogenesis and free gas layers in recently-deposited sediments of Arkona Basin (Baltic Sea)

2012 ◽  
Vol 9 (5) ◽  
pp. 1915-1933 ◽  
Author(s):  
J. M. Mogollón ◽  
A. W. Dale ◽  
H. Fossing ◽  
P. Regnier
Keyword(s):  
Organic Matter ◽  
Baltic Sea ◽  
Reactive Transport ◽  
Reaction Pathway ◽  
Organic Matter Degradation ◽  
Muddy Sediment ◽  
Transport Models ◽  
Methane Gas ◽  
Geochemical Profiles ◽  
Arkona Basin

Abstract. Arkona Basin (southwestern Baltic Sea) is a seasonally-hypoxic basin characterized by the presence of free methane gas in its youngest organic-rich muddy stratum. Through the use of reactive transport models, this study tracks the development of the methane geochemistry in Arkona Basin as this muddy sediment became deposited during the last 8 kyr. Four cores are modeled each pertaining to a unique geochemical scenario according to their respective contemporary geochemical profiles. Ultimately the thickness of the muddy sediment and the flux of particulate organic carbon are crucial in determining the advent of both methanogenesis and free methane gas, the timescales over which methanogenesis takes over as a dominant reaction pathway for organic matter degradation, and the timescales required for free methane gas to form.

Beneficial effect of mixture of additives amendment on enzymatic activities, organic matter degradation and humification during biosolids co-composting

2018 ◽  
Vol 247 ◽  
pp. 138-146 ◽  
Author(s):  
Mukesh Kumar Awasthi ◽  
Quan Wang ◽  
Hongyu Chen ◽  
Sanjeev Kumar Awasthi ◽  
Meijing Wang ◽  
...  
Keyword(s):  
Organic Matter ◽  
Beneficial Effect ◽  
Enzymatic Activities ◽  
Organic Matter Degradation

scholarly journals Thermokarst lake waters across the permafrost zones of western Siberia

2014 ◽  
Vol 8 (4) ◽  
pp. 1177-1193 ◽  
Author(s):  
R. M. Manasypov ◽  
O. S. Pokrovsky ◽  
S. N. Kirpotin ◽  
L. S. Shirokova
Keyword(s):  
Western Siberia ◽  
Chemical Elements ◽  
Chemical Compositions ◽  
Thermokarst Lakes ◽  
Thermokarst Lake ◽  
Surface Areas ◽  
Discontinuous Permafrost ◽  
Latitudinal Position ◽  
Hydrochemical Composition ◽  
Lake Waters

Abstract. This work describes the hydrochemical composition of thermokarst lake and pond ecosystems, which are observed in various sizes with different degrees of permafrost influence and are located in the northern part of western Siberia within the continuous and discontinuous permafrost zones. We analysed the elemental chemical composition of the lake waters relative to their surface areas (from 10 to 106 m2) and described the elemental composition of the thermokarst water body ecosystems in detail. We revealed significant correlations between the Fe, Al, dissolved organic carbon (DOC) and various chemical elements across a latitude gradient covering approximately 900 km. Several groups of chemical elements that reflect the evolution of the studied water bodies were distinguished. Combining the data for the studied latitude profile with the information available in the current literature demonstrated that the average dissolved elemental concentrations in lakes with different areas depend specifically on the latitudinal position, which is presumably linked to (1) the elements leached from frozen peat, which is the main source of the solutes in thermokarst lakes, (2) marine atmospheric aerosol depositions, particularly near the sea border and (3) short-range industrial pollution by certain metals from the largest Russian Arctic smelter. We discuss the evolution of the chemical compositions observed in thermokarst lakes during their formation and drainage and predict the effect that changing the permafrost regime in western Siberia has on the hydrochemistry of the lakes.

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