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The primary scientific goal of studying salt lakes is to better understand the formation of small continental-type hydrogeochemical systems. Many scientists have attributed the metamorphism of the chemical composition of salt lakes to the evaporative concentration of water. However, the formation of soda water is inconsistent with this hypothesis. Thus, analyzing intrabasinal biochemical processes and water—rocks interactions during the evaporative concentration of water allows us to understand the major mechanisms of the formation and evolution of water compositions. Therefore, the aim of this paper is to identify the key processes involved in the formation of the chemical composition of the water in Lake Doroninskoye. An analysis of the distribution of major components shows that Na+, HCO3 ?, CO3 2?, and Cl? are dominant in this water. High concentrations of these elements are the result of evaporative water concentration. Calcium, magnesium, and potassium are not accumulated because the water is saturated in minerals containing these elements. The main barrier to the growth of the sulfate content of water is sulfate reduction. This process also contributes to the additional reproduction of carbon dioxide, which reacts with the products of the hydrolysis of aluminosilicates OH? to form HCO3 ? and CO3 2?, thus further contributing to the natural processes of soda formation. 相似文献
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Zamana Leonid Vasilevich 《中国地理科学(英文版)》1995,5(2):185-192
POSSIBLEHYDROGEOCHEMICALPRECONDITIONSFORKASHIN-BECKDISEASEINTRANSBAIKALIA¥ZamanaLeonidVasilevich(ChitaInstituteofNaturalResou... 相似文献
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Results from hydrochemical investigations into macrocomponent composition of some of the lakes in the Southeastern Transbaikalia are presented. The region's saline lakes, as a rule, are soda-chloride or chloride-soda lakes according to their chemical composition. The lakes hydrochemistry is determined by a combination of evaporative concentration of salt composition, intra-water body hydrobiological processes, especially by the production of organic matter and reduction of sulfates as well as by hydrogenic sedimentation. 相似文献
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Contents of inorganic reduced forms of sulfur were determined in the oxygen-bearing waters of saline-soda Lake Doroninskoe.
The vertical and annual distributions of individual species and total reduced sulfur have been studied. It was found that
oxic zone ubiquitously contains reduced sulfur with contents: HS− 0.002–3.86 mg/l, S0 0.002–0.129 mg/l, S0; 4+ 0.014–9.19 mg/l. Oxygen concentrations varied from 0 to 6.8 mg/l. These sulfur compounds show unsystematic vertical distribution,
which during transitional season is controlled by intensity of bacterial processes. 相似文献
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The concentration of elemental sulfur (S0) in the upper oxic layer of the meromictic (stratified by water mineralization) soda Lake Doroninskoe (about 5.5 m depth)
varied in the survey periods from the detection limit (0.002 mg/l) to the registered maximum of 0.444 mg/l, with an average
value of 0.12 mg/l. In the lower hydrosulfide layer, these concentrations amounted to 0.012–1.88 mg/l. The results obtained
point to the processes of sulfide sulfur oxidation under reductive conditions, and of sulfate reduction to form hydrogen sulfide
in the oxic medium. The dynamics of the seasonal S0-thiosulfate ratio testifies to the dual (oxidative and reductive) nature of the latter. 相似文献
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A.M. Plyusnin L.V. Zamana S.L. Shvartsev O.G. Tokarenko M.K. Chernyavskii 《Russian Geology and Geophysics》2013,54(5):495-508
The chemical, gas, and isotopic compositions of nitric thermal waters in the Baikal Rift Zone are considered. It is shown that the behavior of sulfate and carbonate ions in hydrothermal systems is different, which indicates that they are of two different origins. The studied thermal waters are of five chemical types formed in different geologic conditions. Special attention is given to the genesis of hydrotherms, the geologic and geomorphologic conditions of their recharge, and their equilibrium with rocks. It has been established that most of chemical elements of the waters migrated from rocks, but a significant portion of them is bound by secondary minerals, which results in their deep differentiation, accumulation, or precipitation. Thus, the so-called redundant elements appear, which were earlier considered to be of mantle origin. 相似文献
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Leonid V. Zamana 《中国地质》2010,37(3):607-613
本文通过对在外贝加尔大骨节病区水文地球化学研究结果表明,该地区天然水呈现出高浓度的磷(高达3.5 me/L),同时,锰、硅、铅等元素也呈现出高浓度的地球化学特征.分析水文地球化学数据,认为大骨节病可能与生物地球化学性质的多种因素有关系.进一步研究大骨节病的成因机制需要新的可靠的环境地球化学数据. 相似文献
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