Hydrogeochemical and isotope geochemical study of northwestern Algerian thermal waters

Belhai, Mohamed; Fujimitsu, Yasuhiro; Bouchareb-Haouchine, Fatima Zohra; Iwanaga, Tatsuto; Noto, Masami; Nishijima, Jun

doi:10.1007/s12517-015-2252-2

Cited by 15 publications

(5 citation statements)

References 29 publications

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“…In contrast, samples 1 and 4, collected close to the coast of the Mediterranean Sea indicate mixing between seawater and groundwater, with high values of Na. The scatter diagram of Ca+Mg vs HCO 3 /SO 4 shows a high ratio indicating a carbonate and evaporitic source for the thermal waters, i.e., an origin of Ca and Mg from Triassic formations (Belhai et al 2016). The highest values of Mg (up to 46 for the most samples) indicate a near-surface reaction that leaches Mg from the Jurassic carbonates (dolomite).…”

Section: Hydrochemistrymentioning

confidence: 93%

Hydrochemistry and geothermometry of thermal water in northeastern Morocco

2018

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Section: Hydrochemistrymentioning

confidence: 93%

Hydrochemistry and geothermometry of thermal water in northeastern Morocco

2018

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“…The Na + /Clratio (meq/L) varied from 0.86 to 1.68 with a median of 0.95 in the thermal springs and 0.24 to 7.25 with a median of 0.92 in the non-thermal springs. All samples proved to be undersaturated with respect to halite (Table S2), indicating that they have not been in equilibrium with halite (Belhai et al 2016). As shown in Fig.…”

Section: Mechanisms Controlling Springs Water Chemistrymentioning

confidence: 95%

Source of 226Ra in Ramsar spring water, Iran: implication of water–rock interaction and stable isotopes

et al. 2021

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This study was carried out primarily to understand the hydrogeochemical processes controlling the 226 Ra anomalies in Ramsar area. Analyses revealed two types of water; 1) non-thermal Ca-HCO 3 type and 2) thermal Na-Cl type, mainly of meteoric and hydrothermal origin, respectively. Non-thermal springs have higher concentrations of U due to silicate weathering. Thermal springs are characterized by high concentrations of 226 Ra, As, Fe, Li, Cs, Rb, Sr, Ba, B, Br -, F -, NO 3 -, PO 4 3and SiO 2 resulting from high temperature water-rock interaction and mixing with hydrothermal fluids. Thermal springs are manifestations of an old hydrothermal system with subsurface reservoir temperatures varying between 83 and 100°C. Radium activity is negatively correlated with pH and positively correlated with TDS, Cl -, Ba, and Ca, reflecting competitive ion effects of alkaline-earth metals, complexing with Cl -, and coprecipitation with barite and calcite. These processes are thought to be the dominant factors in controlling 226 Ra mobility in springs water.

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“…In general, high EC values can be caused by high concentrations of dissolved minerals in water (Zainal et al, 2016). Higher TDS values reflect a longer circulation path and residence time (Belhai et al, 2016). Assuming that the springs belong to the same water source, geological context and thermal source, temperatures at the spring vent indicate the circulation depth, time of circulation and regional geothermal gradients (Zainal et al, 2016).…”

Section: Hydrochemical Featuresmentioning

confidence: 99%

Hydrogeochemical origin and circulation of spring waters along the Karakorum fault, Western Tibetan Plateau: Implications for interaction between hydrosphere and lithosphere

Wang

Zhou

et al. 2022

Front. Earth Sci.

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Geochemical investigation on the origin and circulation of geothermal water is crucial for better understanding the interaction between hydrosphere and lithosphere. Previous studies on the Himalayan geothermal belt mainly distributed in the central and eastern Tibetan Plateau. In this study, water samples (8 hot springs and 1 cold spring) from the Karakorum fault (KKF) zone of western Tibetan Plateau were analyzed for the hydrogeochemical characteristics and isotopic compositions. Three types of spring water along the KKF were classified on basis of ionic concentration and Sr isotopic composition: type A water (HCO3–Mg or Ca), type B water (HCO3–Na) and type C water (Cl–Na). Type A water is originated from the infiltration of meteoric water and the dissolution of silicate/evaporite. Type B water is mainly leached from the metamorphic and granitoid rocks. Type C water is formed by the dissolution of chlorides and sulphates. δD and δ18O isotopes indicate that geothermal fluid along the fault zone was mainly recharged by local precipitation. Moreover, reservoir temperatures of 144.2–208.6°C were estimated by the silica–enthalpy mixing model, and the thermal waters have a relatively deep circulation depth (≥ 7.0 km). Meanwhile, the thermal waters are characterized by extremely high Li, B, Fe and As concentrations and earthquakes frequently happened in the vicinity, suggesting that the KKF is a deep and active fault, which also indicates that the thermal fluids are strongly associated with seismicity. Therefore, thermal fluid can potentially be used as continuous monitoring sites for earthquake forecasting.

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Hydrogeochemical and isotope geochemical study of northwestern Algerian thermal waters

Cited by 15 publications

References 29 publications

Hydrochemistry and geothermometry of thermal water in northeastern Morocco

Hydrochemistry and geothermometry of thermal water in northeastern Morocco

Source of 226Ra in Ramsar spring water, Iran: implication of water–rock interaction and stable isotopes

Hydrogeochemical origin and circulation of spring waters along the Karakorum fault, Western Tibetan Plateau: Implications for interaction between hydrosphere and lithosphere

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