Geochemistry of natural waters of the Baydar valley (Crimean Peninsula)

Nichkova, L.A.; Новиков, Д. А.; Черных, А. В.; Dultsev, F. F.; Sigora, G.A.; Khomenko, Tamara Yu.

doi:10.1051/e3sconf/20199801036

Cited by 5 publications

(1 citation statement)

References 1 publication

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“…Воды, независимо от генезиса и состава, с момента попадания в осадочный бассейн вступают в сложнейшую цепь геохимических процессов в системе «вода -порода -газ -органическое вещество», которая носит четко выраженный равновесно-неравновесный характер [9]. До настоящего времени с гидрогеохимической точки зрения природные воды рассматриваемого региона являются все ещё слабо изученными [1][2][3][4][5][6][7][8][11][12]. В этой связи сотрудниками ИНГГ СО РАН на территории Севастопольской городской агломерации (СГА) в 2018-2019 годах проведены полевые гидрогеохимические исследования состава подземных и поверхностных вод, положенные в основу настоящей публикации в связи с характеристикой их химического состава и перспектив использования для питьевого водоснабжения.…”

Section: Introductionunclassified

The Role of the Water-Rock System in the Formation of Drinking Water Composition of the Sevastopol City

Khvashchevskaya¹,

Kopylova²,

Smetanina³

et al. 2020

Water-Rock Interaction: Geological Evolution

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rNa/rCl и SO4/Cl) позволило впервые выделить однородные геохимические совокупности по процессам формирования состава питьевых вод. Наряду с ключевой ролью системы вода-порода на формирование их состава оказывают существенное влияние процессы континентального засоления и антропогенного загрязнения. Изученные воды находятся на начальных стадиях формирования химического состава с позиции геологической эволюции системы вода-порода. Состояние равновесия вод с карбонатными минералами достигается уже в маломинерализованных поверхностных водах и насыщенность ими природных вод повышается с увеличением времени взаимодействия с существенно-карбонатными и карбонатно-терригенными образованиями. Состав равновесных минералов в поверхностных водах представлен кальцитом и доломитом. В трещинножильных водах и водах зоны региональной трещиноватости карбонатных и карбонатно-терригенных образований он значительно усложняется до насыщения доломитом, кальцитом, сидеритом, родохрозитом и магнезитом. Равновесие вод с сульфатными минералами прослеживается только в отдельных водопунктах (колодец южный пос Колхозное, источник Фонтан Варналы, источник Странный) и в водах с антропогенной нагрузкой (пос. Колхозное, Инкерманского и Орловского водозаборов).

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Section: Introductionunclassified

The Role of the Water-Rock System in the Formation of Drinking Water Composition of the Sevastopol City

Khvashchevskaya¹,

Kopylova²,

Smetanina³

et al. 2020

Water-Rock Interaction: Geological Evolution

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New Data on Hydrogeochemical and Isotopic Composition of Natural Waters of the Baidar Valley (Crimean Peninsula)

Novikov

Kopylova

Chernykh

et al. 2021

Russian Geology and Geophysics

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—Results of study of natural waters of the Baidar valley (southwestern Crimean Peninsula) obtained during the 2018–2019 field works are presented. Major groundwater resources of the study area are confined to the Upper Jurassic aquifer complex, which serves as a recharge source for the aquifer systems of the Plain Crimean and the Azov–Kuban’ artesian basins and hydrogeologic folded region of the Crimean Mountains mega-anticlinorium. The regional waters are fresh and ultrafresh, predominantly of calcium bicarbonate composition, with TDS varying from 208 to 1269 mg/dm3. The study enabled their classification into eight geochemical groups: (1) waters of a regional fracture zone in carbonate-terrigenous rocks affected by continental salinization; (2) waters of a regional fracture zone affected by leaching of aluminosilicates and sulfide oxidation; (3) waters of a regional fracture zone dominated by sodium aluminosilicates in the fracture filling (long-term interaction in the water–rock system), affected by continental salinization; (4) regional fracture zones dominated by sodium aluminosilicates affected by anthropogenic continental salinization; (5) groundwaters in fracture–vein aquifers affected by leaching of aluminosilicates and sulfide oxidation; (6) fracture–vein aquifers affected by leaching of sodium aluminosilicates (long-term interaction in the water–rock system); (7) waters in fractured karst aquifers; and (8) surface waters subjected to continental salinization. Fracture karst waters, which were found to be most protected against human impact and continental salinization processes, are slightly alkaline (pH = 7.7), fresh (with average TDS = 444 mg/dm3), with low silicon concentrations (2.23 mg/dm3), and of calcium bicarbonate composition. Waters residing in regional fracture and fracture–vein zones are affected by continental salinization and anthropogenic load and are neutral to alkaline (pH = 7.1–8.6), predominantly fresh (TDS = 269–1269 mg/dm3), with average silicon concentrations of 4.61–4.70 mg/dm3, of calcium bicarbonate composition, with high concentrations of sulfate ion, magnesium, and sodium. The waters of the Chernaya River, Chernorechensk reservoir, and lakes, which are also affected by continental salinization, are slightly alkaline (pH = 8.3), brackish (TDS = 207–364 mg/dm3), with an average silicon concentration of 1.18 mg/dm3, of calcium bicarbonate composition, with high concentrations of chlorine ion, magnesium, and sodium. The calculated intensity of chemical-element migration in waters of the background composition follows the descending order: very strong, I17.7 > Br14.4; strong, Se2.83 > B2.22 > Sr1.46 > Sb1.12 > Be1.07 > Hg1.06; moderately strong, Zn0.74 > Mo0.50 > Li0.46 > Sc0.41 > Ag0.18 > As0.16 > Si0.123 > Ba0.122; weak, Cr0.10 > Cu0.096 > Bi0.080 > Sn0.068 > Tl0.067 > P0.062 > Ni0.043 > Ta0.040 > Ge0.034 > Cd0.028 > Fe0.026 > Rb0.024 > Co0.023 > Pb0.020 > W0.017 > V0.012; very weak (inert), Nb0.008 > Hf0.0033 > Mn0.0031 > La0.0029 > Cs0.0022 > Ti0.0018 > Ga0.0016 > Y0.0013 > Al0.0008 > Zr0.0008. All the studied waters are found to be of atmospheric origin and located along the global (GMWL) and local (LMWL) meteoric water lines. Their δ18O value varies from –9.9 to –3.3‰, and δD value, from –64.2 to –32.5‰. Sedimentary carbonate rocks, atmospheric carbon dioxide, organic compounds, and hydrolysis of aluminosilicate minerals serve as the source of δ13C bicarbonate ion in natural waters of the Baidar valley. Surface waters have a heavier carbon isotope composition (δ13C = –9.2 to –6.2‰), which is due to atmospheric CO2, plant growth, and associated microbial activity. Fracture karst waters are characterized by a lighter carbon isotope composition (δ13C = –12.8 to –11.0‰) because of their interaction with dispersed organic matter. Waters of the regional fracture and fracture–vein zones display the widest variation in δ13C (–15.5 to –6.9‰), which is associated with a mixed type of “isotope supply” to the waters. A complex hydrogeochemical field that has formed in the Baidar valley tends to be increasingly affected by the anthropogenic factor.

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New Data on Hydrogeochemistry of the Mineral Waters of the Crimean Peninsula

Novikov

Khvashchevskaya

Sidorina

et al. 2021

Interexpo GEO-Siberia

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Relevant data on the composition of mineral waters from 23 deposits and occurrences in the Crimean Peninsula are presented. The characteristic of 7 occurrences that have been previously unknown is presented. The studied waters are distinguished by broad-range variations in chemical composition, geochemical parameters of the medium, and the concentrations of biologically active components. Waters with the composition SO4-Cl-HCO3 Na, Cl Na, SO4-HCO3 Mg-Ca-Na, SO4-Cl Mg-Nam with TDS from ultra-fresh to brine level (0.4 - 202.9 g/dm3) are dominating. The waters relate to two large groups according to the geochemical parameters of the medium. The first group is characterized by reductive conditions with Eh from -330.2 to -22.3, pH from 7.3 to 9.1 and O2dissolved concentration 0.79 - 6.48 mg/dm3. The second group is characterized by oxidative Eh (+22.1 - +158.5), neutral and weakly alkaline pH (7,0 - 8,4), and O2dissolved concentrations from 2.73 to 6.92 mg/dm3. The studied waters exhibit a broad range of balneological properties, which allowed us to distinguish 13 types of mineral waters.

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Geochemistry of natural waters of the Baydar valley (Crimean Peninsula)

Cited by 5 publications

References 1 publication

The Role of the Water-Rock System in the Formation of Drinking Water Composition of the Sevastopol City

The Role of the Water-Rock System in the Formation of Drinking Water Composition of the Sevastopol City

New Data on Hydrogeochemical and Isotopic Composition of Natural Waters of the Baidar Valley (Crimean Peninsula)

New Data on Hydrogeochemistry of the Mineral Waters of the Crimean Peninsula

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