Model for the formation of fluorine-bearing rocks in the Carboniferous deposits of the Moscow artesian basin

Limantseva, O. A.; Ryzhenko, B. N.; Cherkasova, E. V.

doi:10.1134/s0016702907090042

Cited by 4 publications

(5 citation statements)

References 2 publications

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“…В данной работе мы не анализируем весь спектр изменения состава раствора, это задача специального исследования. Тем не менее отметим, что поведение фтора в рассмотренном растворе, как и в растворе гранита [Pavlov, Chudnenko, 2013а, 2013b, отличается высокой устойчивостью к накопле нию с увеличением степени взаимодействия до значений минерализации более 1.5 г/кг Н 2 О в отличие от его поведения в растворах карбонатных пород [Limantseva et al, 2007], где соленость раствора в этом интервале значений не влияет на его концентрацию. В соответствии с обозначенной выше целью рассмотрим те варианты расчета модельного раствора, минерализация и состав которых соответствуют характеристикам природных гидротерм с высоким содержанием фтора, распространенных в кристаллических породах и выделенных в работе [Lomonosov, 1974] в кульдурский тип.…”

Section: Discussionunclassified

Modeling the Formation of Fluoride Nitrogen-Rich Hot Springs in the Water – Crystalline Rock System

Pavlov

Чудненко

Хромов³

2020

Geodin. tektonofiz.

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Physicochemical interactions in the water -porphyrite system in conditions of formation of nitrogen-rich hot springs were studied using computer simulation. Compositions of model solutions during such interactions are determined by a combined influence of the compositions of primary and secondary rock minerals. In the investigated interaction range, the solution actively processes large quantities of the primary rock in favor of secondary minerals, while dissolved components are accumulated in small amounts in the solution itself, and therefore the salinity is low. The intervals of the formation of hydrosilicate, bicarbonate and sulfate sodium solutions are clearly distinguished in the process of irreversible hydrolytic transformation of porphyrite. In a certain range of interactions, the compositions of the model solutions are well comparable with the compositions of natural high-fluoride hot springs. Nitrogen-rich hot springs are strongly influenced by meteogenic factors detectable by detailed and/or sufficiently long-term observations. In deep and surface conditions, the model solutions and natural hot springs considerably differ in composition. Differences are hardly noticeable in the behavior of cations, fluorine, chlorine, and sulfates, but are strongly manifested in changes in the quantities of carbon and silicon compounds and transformations of their forms. These transformations explain the hitherto incomprehensibly different ratios of hydrocarbonate and carbonate ions and hydrosilicate ions and silicic acid both in different hydrothermal sources and in different analyses of hot springs in nature. The development of thermal waters in crystalline rocks is related to two types of heterogeneities that are typical for the development of geological bodies. The first heterogeneity is the disturbed continuity of rocks in fault zones of various orders, due to which groundwater can penetrate into these structures. The uneven distribution of anionic elements in space is another heterogeneity predetermining the groundwater composition and, in particular, accumulation of fluorine, which is confirmed by the results of geological studies, as well as the study of the formation of high-fluoride groundwaters (including thermal water) in various geological structures.

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Section: Discussionunclassified

Modeling the Formation of Fluoride Nitrogen-Rich Hot Springs in the Water – Crystalline Rock System

Pavlov

Чудненко

Хромов³

2020

Geodin. tektonofiz.

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“…The correlation of strontium with bicarbonate ions is also significant (r = 0.83 0.01), since bicarbonate ions are one of the main components of low-mineralized w However, in more mineralized waters they are partially "replaced" by sulfate ions chloride [24,25] (see Figure 8a,c-e). At the same time, as shown above, cal concentrations increased in proportion to the concentrations of bicarbonate ions, al low-mineralized waters, and then were partially "replaced" by sodium (see Figure 8 Based on the established correlation of the concentrations of strontium (Figure chlorine ions, and sodium (Figure 8d) with the total mineralization of groundwater the tendency of increasing strontium concentrations with increasing sodium and chlo content, it can be assumed that there is an influence of the upwelling of salt waters the lower substage of the Kazan aquifer (see Figure 2) to increase the strontium conte drinking water.…”

Section: Groundwater With Strontium Concentrations Above the Mpcmentioning

confidence: 98%

“…The correlation of strontium with bicarbonate ions is also significant (r = 0.83, p = 0.01), since bicarbonate ions are one of the main components of low-mineralized water. However, in more mineralized waters they are partially "replaced" by sulfate ions and chloride [24,25] (see Figure 8a,c-e). At the same time, as shown above, calcium concentrations increased in proportion to the concentrations of bicarbonate ions, also in low-mineralized waters, and then were partially "replaced" by sodium (see Figure 8e,d).…”

Section: Groundwater With Strontium Concentrations Above the Mpcmentioning

confidence: 99%

“…The relevance of studying fresh groundwater is due to the fact that: (1) drinking water is the most necessary and obligatory substance in the human diet, (2) groundwater with a high strontium content forms regional hydrogeochemical provinces in areas of widespread carbonate rocks in humid areas [11,22,23], and (3) groundwater with high strontium content is also widespread in arid zones due to the evaporative concentration of relatively shallow groundwater [2]. Significant research has been carried out in central Russia, Siberia, China, the US, and Australia [24][25][26][27][28][29][30]. Geological-hydrogeological, statistical, and thermodynamic analyses have shown that in a number of cases there is a relationship between the strontium content in water and the lithology of rocks, the age of groundwater, the total dissolved solids (TDS), and the degree of saturation of groundwater in relation to gypsum and celestite.…”

Section: Introductionmentioning

confidence: 99%

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Features of the Formation of Strontium Pollution of Drinking Groundwater and Associated Health Risks in the North-West of Russia

Malov

2023

Water

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The purpose of this research was to determine the natural factors that contribute to maintaining the standard quality of fresh drinking groundwater in areas with high strontium content. Hazard index values for the consumption of water containing strontium were also calculated to assess the overall non-carcinogenic health risk from combined ingestion and dermal exposure. The results showed that the groundwater with strontium concentrations exceeding the maximum permissible concentrations had an increased correlation of strontium concentrations with total dissolved solids and celestite and gypsum saturation indices. A decrease in calcium content was recorded with a simultaneous increase in the concentration of magnesium and strontium. Reducing conditions in the aquifer were also favorable for the conservation of these waters. In waters of standard quality, all these factors did not appear, which indicates their formation in sediments with discretely located small inclusions of celestite and gypsum. These waters were characterized by a calcium bicarbonate composition, low total dissolved solids (TDS), and oxidizing conditions. Elevated radiocarbon contents indicate their relatively young age. In general, it was found that children in the study area are most vulnerable to risks. Fifty percent of wells supply drinking water that is unsafe for consumption. The water from about a third of the wells studied is dangerous for adults.

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“…При изучении фторсодержащих вод в разных регионах мира большинство исследователей связывают высокие концентрации этого элемента с растворением флюорита и его десорбцией из водовмещающих пород в условиях щелочной сре-ды и низкой концентрации кальция [9][10][11][12]. Кроме этого, среди факторов, способствующих накоплению фтора в подземных водах, называют испарительное концентрирование, ионный обмен, антропогенное загрязнение подземных вод.…”

Section: Introductionunclassified

Fluorine in surface and suprapermafrost waters in Central Yakutia

2022

ASNR

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Избыточное потребление фтора приводит к нарушениям в костномышечной, нейроэндокринной и сердечно-сосудистой системах, а недостаток -к формированию кариеса зубов. Для проведения исследований использованы химические анализы водных проб из поверхностных водотоков и водоемов (479 проб), а также из подземных вод зоны свободного водообмена (375 проб). Установлено, что в водах рек и в подземных водах подрусловых таликов среднее содержание фтора составляет не более 0,3 мг/л и не достигает оптимального уровня для питьевых вод. В водах озер и в таликах под водно-эрозионными и тукулановыми озерами также отмечается дефицит фтора. Однако, в непроточных озерах, в катионном составе воды которых более 50 % приходится на натрий-ион, содержание фтора может превышать 1,5 мг/л, а в водах таликов под непроточными термокарcтовыми озерами его концентрация и вовсе достигает 3,2 мг/л. Насыщение надмерзлотных вод фтором может происходить на участках их разгрузки под влиянием процессов криогенной дезинтеграции водовмещающих пород и метаморфизации химического состава воды при фазовых переходах, которые приводят к выпадению из раствора кальцита, повышению его рН и накоплению фтора.

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Model for the formation of fluorine-bearing rocks in the Carboniferous deposits of the Moscow artesian basin

Cited by 4 publications

References 2 publications

Modeling the Formation of Fluoride Nitrogen-Rich Hot Springs in the Water – Crystalline Rock System

Modeling the Formation of Fluoride Nitrogen-Rich Hot Springs in the Water – Crystalline Rock System

Features of the Formation of Strontium Pollution of Drinking Groundwater and Associated Health Risks in the North-West of Russia

Fluorine in surface and suprapermafrost waters in Central Yakutia

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