Isotopic composition and origin of mineral and geothermal waters from Tuşnad Băi Spa, Harghita Mountains, Romania

Papp, Delia Cristina; Nitoi, E.

doi:10.1016/j.gexplo.2005.12.008

Cited by 19 publications

(4 citation statements)

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“…The radio-geochemistry of the geothermic fluids campaigns for geological attributes of these settings. The main geothermal indicators include dissolved gases, trace elements, isotopes, carbonate chemistry and chemical geothermometers ( Cruz and França, 2006 ; Hobba et al., 1979 ; Jilali et al., 2018 ; Papp and Niţoi, 2006 ). Estimation of the reservoir's fluid temperature is measured through several chemical and isotopic geothermometers like dissolved silica, (Na + /K + ), (Na + /K + /Ca +2 ), (Na + /K + /Ca +2 /Mg +2 ), (K + /Mg +2 ) or δ 18 O (H 2 O-SO), and these have been used as geochemical tools in geothermal examination since 1965 ( Hobba et al., 1979 ; Kharaka and Mariner, 1989 ).…”

Section: Introductionmentioning

confidence: 99%

Bacterial diversity, physicochemical and geothermometry of South Asian hot springs

Najar

Sharma

Das

et al. 2022

Current Research in Microbial Sciences

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Section: Introductionmentioning

confidence: 99%

Bacterial diversity, physicochemical and geothermometry of South Asian hot springs

Najar

Sharma

Das

et al. 2022

Current Research in Microbial Sciences

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“…Hot springs on Earth are generally associated with hydrothermal activity on volcanic islands, where a magma chamber is present beneath the surface (Du et al, ; Möller et al, ; Papp & Niţoi, ; Qin et al, ; Sanada et al, ; Vengosh et al, ). Commonly, the magma chamber heats up the surrounding rocks, leading to an increase in the temperature of the resident groundwater as it comes in contact with heated rock (McCarthy et al, ).…”

Section: Introductionmentioning

confidence: 99%

Elevated Equilibrium Geotherm in Stable Continental Shield: Evidence From Integrated Structural, Hydrological, and Electromagnetic Studies on Nonvolcanic Hot Springs in the Eastern Ghats Belt, India

et al. 2020

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Nonvolcanic hot springs occur within Neoproterozoic granulites of the tectonically stable Eastern Ghats Belt in the Indian shield. Penetrative granulite facies planar structural fabrics in the northern Eastern Ghats Belt are reoriented within an E‐W striking, northerly dipping ductile shear zone that is subsequently dissected by WNW‐ESE trending, subvertical pseudotachylite‐bearing faults and fractures. Tube and dug wells in the area yield both thermal (~60 °C) and nonthermal (~28 °C) water. Chemical analyses reveal that the thermal water is richer in Na+, K+, and Cl−, with lower bicarbonate content. Stable isotope analyses (δ2H and δ18O) of the thermal and nonthermal waters both plot on the Global Meteoric Water Line; however, tritium and 14C ages indicate that the nonthermal water is relatively modern, while the thermal waters are older. This suggests that both waters come from distinct reservoirs. Very low frequency electromagnetic studies show that water circulates through the WNW‐ESE trending fracture systems but also exists in isolated pockets within the crystalline country rock. Heat production studies reveal that some host rocks have exceptionally high heat‐producing element concentrations, primarily as thorium within the minerals monazite and thorite. Meteoric waters entrapped for longer times near these heat‐producing element‐rich pockets undergo radiogenic heating, and are shielded from the nonthermal groundwater circulating within the fracture system. The high heat‐producing element distribution in the crust resulting from Neoproterozoic geological events has, thus, elevated the present‐day equilibrium geotherm in the Eastern Ghats Belt, forming sources for shallow‐level, nonvolcanic hot springs within a tectonically inactive terrane.

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“…In the East Carpathian Arc one can find two volcanic segments (the North-Western segment: Oaş-Gutâi and the South-Eastern segment: Cȃlimani-Gurghiu-Harghita that are separated by a subvolcanic zone (Ţibleş-Toroioaga-RodnaBârgȃu). The natural mineral waters in this area are highly carbonated and the hydrochemical properties are mainly related to the post-volcanic phenomena (Papp and Niţoi 2006). Studies on the geochemistry of these counties (Feru 2004) show that there are carbonate rocks that include limestones, calcarenites, conglomerates (about 45%), pyroclastics, and andesites (about 25%) in detritic deposits consisting of sand and gravel (about 25%) and a limited extent in sandstones and crystalline schist.…”

Section: Introductionmentioning

confidence: 99%

Barium concentrations and speciation in mineral natural waters of central Romania

Tudorache

Marin

Badea

et al. 2009

Environ Monit Assess

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This paper reports the results obtained for the determination of Ba concentrations in mineral groundwater samples collected from drilled outlets located in the counties of Covasna and Harghita (34 sampling points), in five expeditions (spring, summer, and autumn), during 3 years: 2005, 2006, and 2007. The experimental data show that there are some sampling sites in which the barium concentration exceeds 1 mg/L, which is the maximum concentration admitted for barium. These mineral natural waters could be used only for therapeutic purposes. All other analyzed natural mineral waters are proper as both drinking and therapeutic water. By means of a principal component analysis a statistical approach was performed, using the data obtained during those analyzing processes. The distribution of the water saturation indexes with respect to a series of mineral species (alstonite, barite, barytocalcite, nitrobarite, sanbornite, and witherite) suggests that barium tends to remain in solution as ionic species in different concentrations and to be further carried away as such.

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Isotopic composition and origin of mineral and geothermal waters from Tuşnad Băi Spa, Harghita Mountains, Romania

Cited by 19 publications

References 1 publication

Bacterial diversity, physicochemical and geothermometry of South Asian hot springs

Bacterial diversity, physicochemical and geothermometry of South Asian hot springs

Elevated Equilibrium Geotherm in Stable Continental Shield: Evidence From Integrated Structural, Hydrological, and Electromagnetic Studies on Nonvolcanic Hot Springs in the Eastern Ghats Belt, India

Barium concentrations and speciation in mineral natural waters of central Romania

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