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Geochemical signal of seasonality in annually laminated organic-carbonate sediments in Shira lake (Khakasia) [Text] / I. Kalugin [et al.] // Acta Geol. Sin.-Engl. Ed. - 2014. - Vol. 88. - P12-13, DOI 10.1111/1755-6724.12265_5. - Cited References:1. - This study was supported by the Integration projects of the SiberianBranch, Russian Academy of Sciences (No 34 and No 56). . - ISSN 1000-9515. - ISSN 1755-6724

РУБ Geosciences, Multidisciplinary

Кл.слова (ненормированные):
saline lake Shira -- seasonal sedimentation -- physicochemical modeling -- carbonates -- Ca -- Sr ratio

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Держатели документа:
Russian Acad Sci, Sobolev Inst Geol & Mineral, Siberian Branch, Novosibirsk 630090, Russia.
Russian Acad Sci, Inst Biophys, Siberian Branch, Krasnoyarsk 660036, Russia.
ИБФ СО РАН

Доп.точки доступа:
Kalugin, Ivan; Darin, Andrey; Rogozin, Denis; Tret'yakov, Gennady; Siberian Branch, Russian Academy of Sciences [34, 56]

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SEASONAL VARIABILITY OF SEDIMENTATION FLOWS IN SALT MEROMICTIC LAKE SHIRA (KHAKASSIA) / V. V. Babich, A. V. Darin, I. A. Kalugin [и др.] // Bull. Tomsk Polytech. Univ.-Geo Assets Eng. - 2021. - Vol. 332, Is. 12. - С. 22-34, DOI 10.18799/24131830/2021/12/3178. - Cited References:29. - The work was carried out on state assignment of IGM SB RAS, supported by the Ministry of Science and Higher Education of the Russian Federation, with partial support of the RFBR - grant 21-54-52001 (setting of traps, sampling) and grant 19-05-50046 (micro-XRF-SR). . - ISSN 2500-1019. - ISSN 2413-1830

РУБ Engineering, Geological
Рубрики:
CENTRAL TIBETAN PLATEAU
NAM-CO
VARVE
Кл.слова (ненормированные):
Bottom sediments -- sedimentation traps -- salt lakes -- micro-XRF -- synchrotron radiation -- regression analysis
Аннотация: The relevance of the work is caused by the need to study seasonal variations in the volume and composition of sedimentation flows in modern lakes and their relationship with weather and climatic factors, which can serve as a basis for reconstructing climatic changes in the past. The main aim: to assess seasonal changes in the mass, velocity and chemical composition of sedimentary material entering Lake Shira on the basis of generalization and analysis of the results of multiyear annual monitoring of the material of sedimentation traps incubated in the lake. Object of the study was the drainless, slightly saline meromictic lake Shira, located in the steppe intermontane depression on the territory of the Republic of Khakassia. Methods: long-term seasonal monitoring of sedimentary material forming bottom sediments using sedimentation traps incubated in the lake; study of the obtained material for a wide range of parameters (biological, hydrochemical, lithological-geochemical, granulometric, etc.) by various conventional methods, including the method of X-ray fluorescence microanalysis on synchrotron radiation beams (XRF-SI), adapted for the study of bottom samples; computer statistical analysis of the data obtained (multiple regression method, cross-correlation analysis, etc.) in order to identify the relationship between regional temperatures and the chemical composition of the deposited material with the construction of a regression model. Results. Based on the study of the amount and elemental composition of the sedimentary material of the seasonal bottom traps of Lake Shira, collected for 2012-2017, a dynamic model of the seasonal influx of sedimentary flows in lakes of this landscape-geochemical type was formulated. It has been established that the most intensive sedimentation of the material occurs in the summer-autumn period, less - in the winter-spring period. At the same time, in spring, the accumulation of allochthonous (terrigenous) aleurite material, supplied with flood waters, predominates; in the summer-autumn period, simultaneously with the deposition of clastogenic pelitic material, biogenic and chemogenic materials are accumulated in sediments in large quantities. In winter, clastogenic and biogenic processes of sedimentation practically stop, only chemogenic sedimentation of carbonates is observed. It was established that the sedimentation of allochthonous material entering the reservoir occurs during two-three months, which indicates a certain inertness of sedimentation. The presence of a stable relationship between the mass and chemical composition of terrigenous material entering the lake with the regional temperature of the near-surface air, which is one of the main regulators of the water balance of the reservoir, is shown.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Sobolev Inst Geol & Mineral, 3 Academician Koptyug Ave, Novosibirsk 360090, Russia.
Inst Biophys SB RAS, 50 Akad Gorodok, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Babich, Valery V.; Darin, Andrey, V; Kalugin, Ivan A.; Markovich, Tatyana, I; Zykov, Viktor V.; Rogozin, Denis Yu; Ministry of Science and Higher Education of the Russian Federation; RFBRRussian Foundation for Basic Research (RFBR) [21-54-52001, 19-05-50046]

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