Hydrogeochemistry and geothermometry of Changal thermal springs, Zagros region, Iran

Mohammadi, Zargham; Bagheri, Rahim; Jahanshahi, Reza

doi:10.1016/j.geothermics.2010.06.007

Cited by 46 publications

(14 citation statements)

References 10 publications

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“…These geothermometers have provided coherent results in some systems similar to the ones studied here (e.g. Apollaro et al, 2012;Blasco et al, 2018Blasco et al, , 2017Fernández et al, 1988;Gökgöz and Tarkan, 2006;Michard and Bastide, 1988;Mohammadi et al, 2010;Pastorelli et al, 1999;Wang et al, 2015) and, therefore, their applicability in the Fitero -Arnedillo geothermal system is tested. Classical chemical geothermometers and calibrations used in this study are:…”

Section: Chemical Geothermometerssupporting

confidence: 60%

Geochemical evolution of thermal waters in carbonate – evaporitic systems: The triggering effect of halite dissolution in the dedolomitisation and albitisation processes

Blasco

Auqué

Gimeno

2019

Journal of Hydrology

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The Fitero and Arnedillo geothermal systems are located in the NW part of the Iberian Range (Northern Spain). The geothermal reservoir is hosted in the Lower Jurassic carbonates, in contact with the evaporitic Keuper Facies. Thermal waters are of chloride-sodium type, with discharge temperature of about 45 ºC and near neutral pH. The Arnedillo waters are more saline, with higher Na, Cl and sulphate contents, but lower Ca and Mg than the Fitero waters. All waters have attained mineral equilibrium at 2 depth with calcite, dolomite, anhydrite, quartz, albite, K-feldspar and other aluminosilicates, except for the Fitero waters, which have not reached the equilibrium with the aluminosilicates. The calculated reservoir temperature is 81 ± 11 ºC in Fitero and 87 ± 13 ºC in Arnedillo. In order to identify the reasons for the differences found between the two systems some inverse and forward geochemical calculations were performed and the main water-rock interaction processes responsible for the chemical evolution of these waters have been evaluated. Halite dissolution has been found to be the triggering factor for the two most important geochemical processes in the system: a) albitisation process, due to the common ion effect (Na); and b) dedolomitisation process, associated with the salinity increase, which enhance the dissolution of anhydrite, and, in turn, produces the precipitation of calcite (common ion effect, Ca) and the concomitant dissolution of dolomite. Halite dissolution may be an important driving force in the geochemical evolution of groundwater systems in contact with carbonates and evaporites, where equilibrium with K-feldspar, albite and anhydrite has already been attained. The evolution of the processes at pH, temperature and salinity ranges wider than those in the Fitero-Arnedillo system has been theoretically examined with additional reaction-path simulations, in order to generalise the geochemical behaviour of these processes in other environments.

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Section: Chemical Geothermometerssupporting

confidence: 60%

Geochemical evolution of thermal waters in carbonate – evaporitic systems: The triggering effect of halite dissolution in the dedolomitisation and albitisation processes

Blasco

Auqué

Gimeno

2019

Journal of Hydrology

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“…Reservoir temperatures of two warm springs were estimated by using Quartz (Fournier, 1977) and Na K Ca Mg (Fournier and Potter, 1979) geothermometry methods (Table 3). The results show few similarities between different methods which indicates lack of full chemical equilibrium in the thermal reservoir, mixing of thermal and cold waters may cause the chemical geothermometers to produce uncertain results (Mohammadi et al, 2010).…”

Section: Geothermometrymentioning

confidence: 98%

“…In this graph the ratio Na:Cl of cold spring samples shows Na > Cl, indicating dissolution of silicate and cation exchange rather than the dissolution of halite Fazio, 2002, Sharif et al, 2008), but warm spring samples ratio 1:1 which indicate dissolution of halite. The ratio of Na/Cl is useful in determining halite solution brine from oilfield brine at high chloride concentrations (Mohammadi et al, 2010). Richter et al (1993) suggest that the sodium and chloride occurs at the equal molar concentrations in halite (Na/Cl molar = 1 and Na/Cl mass = 0.6), but in most oilfield brines, the mass ratio of Na/Cl shows lower than 0.6 mg/l.…”

Section: Figmentioning

confidence: 99%

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Isotopic analysis, hydrogeochemistry and geothermometry of Tang-Bijar oilfield springs, Zagros region, Iran

et al. 2015

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“…With the exception of active volcanic areas, carbonate aquifers are the most important geothermal reservoirs in which low-to-medium temperatures are usually reached at significant depths from the ground level (>1000 m) (e.g., [10][11][12][13][14][15][16]).…”

Section: Introductionmentioning

confidence: 99%

Low Enthalpy Geothermal Systems in Structural Controlled Areas: A Sustainability Analysis of Geothermal Resource for Heating Plant (The Mondragone Case in Southern Appennines, Italy)

Iorio¹,

Carotenuto

Corniello

et al. 2020

Energies

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In this study, the sustainability of low-temperature geothermal field exploitation in a carbonate reservoir near Mondragone (CE), Southern Italy, is analyzed. The Mondragone geothermal field has been extensively studied through the research project VIGOR (Valutazione del potenzIale Geotermico delle RegiOni della convergenza). From seismic, geo-electric, hydro-chemical and groundwater data, obtained through the experimental campaigns carried out, physiochemical features of the aquifers and characteristics of the reservoir have been determined. Within this project, a well-doublet open-loop district heating plant has been designed to feed two public schools in Mondragone town. The sustainability of this geothermal application is analyzed in this study. A new exploration well (about 300 m deep) is considered to obtain further stratigraphic and structural information about the reservoir. Using the derived hydrogeological model of the area, a numerical analysis of geothermal exploitation was carried out to assess the thermal perturbation of the reservoir and the sustainability of its exploitation. The effect of extraction and reinjection of fluids on the reservoir was evaluated for 60 years of the plant activity. The results are fundamental to develop a sustainable geothermal heat plant and represent a real case study for the exploitation of similar carbonate reservoir geothermal resources. Author Contributions: Conceptualization, M.I., N.M., and L.V.; Data curation, M.I. and A.C. (Alfonso Corniello); Formal analysis, S.D.F.; Funding acquisition, M.I., A.C. (Alberto Carotenuto), N.M., and L.V.; Methodology, S.D.F. and N.M.; Project administration, M.I., A.C. (Alberto Carotenuto) and N.M.; Writing-original draft, S.D.F.; Writing-review and editing, M.I., A.

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Hydrogeochemistry and geothermometry of Changal thermal springs, Zagros region, Iran

Cited by 46 publications

References 10 publications

Geochemical evolution of thermal waters in carbonate – evaporitic systems: The triggering effect of halite dissolution in the dedolomitisation and albitisation processes

Geochemical evolution of thermal waters in carbonate – evaporitic systems: The triggering effect of halite dissolution in the dedolomitisation and albitisation processes

Isotopic analysis, hydrogeochemistry and geothermometry of Tang-Bijar oilfield springs, Zagros region, Iran

Low Enthalpy Geothermal Systems in Structural Controlled Areas: A Sustainability Analysis of Geothermal Resource for Heating Plant (The Mondragone Case in Southern Appennines, Italy)

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