Environmental Tritium (3H) and hydrochemical investigations to evaluate groundwater in Varahi and Markandeya river basins, Karnataka, India

Ravikumar, P.; Somashekar, R.

doi:10.1016/j.jenvrad.2010.11.006

Cited by 33 publications

(8 citation statements)

References 46 publications

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“…Thus, the K-Mg geothermometer and silica geothermometer may not be appropriate for the reservoir temperature calculation as both will be largely affected by the dilution processes. The 10/ (10 K + Na) versus 10 Mg/(10 Mg + Ca) diagram proposed by Giggenbach [32] ( Figure 10) also shows the deviation of hot springs from the full equilibrium line, and the high Ca + Mg concentration in the Litang area (numbers [15][16][17][18][19][20][21][22][23][24] may indicate the faster equilibration of K-Mg and mixing with Ca-Mg-rich shallow waters [33]. This also explains why the reservoir temperatures calculated by the silica and K-Mg geothermometer are much lower than the other cation geothermometer in the Litang area.…”

Section: Origin Of the Water By O And H Isotopementioning

confidence: 72%

“…All the hot springs (except for the number 10 spring) are falling below and away from the GMWL, and the springs in the Litang area show more negative δD and δ 18 O than those in the Yidun area ( Figure 3). For the surface water collected from nearby, the δ 18 5 Geofluids water with old groundwater and groundwater having been subjected to radioactive decay [5,19]. The tritium concentrations are less than 1 in number 1, number 4, number 8, number 2, number 13, number 12, number 21, number 15, and number 11 springs and are larger than 1 in the number 10 spring (Table 1).…”

Section: General Hydrogeochemistry the Water Chemistry Of The 24 Hotmentioning

confidence: 99%

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Fluid Geochemistry of Fault Zone Hydrothermal System in the Yidun-Litang Area, Eastern Tibetan Plateau Geothermal Belt

Hou

Shi

2018

Geofluids

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The geochemical and geothermal characteristics of hydrothermal systems in an area are useful information to appropriately evaluate the geothermal potential. In this paper, we investigated the chemical and isotopic composition of thermal water in an underexploited geothermal belt, Yidun-Litang area, in eastern Tibetan Plateau. 24 hot spring samples from the Yidun and Litang area were collected and analyzed. The water chemical types of the hot springs are mainly Na-HCO3-type water. Water-rock interaction and cation exchange and mixture are the dominant hydrogeochemical processes in the hydrothermal evolution. The significant shift of D and 18O isotopes from the GMWL indicates that these springs have undergone subsurface boiling before rising to the surface. Different ratios of Cl to other conservation species can be found for the springs in Litang and Yidun areas, suggesting the different heat sources of the two hydrothermal systems. The reservoir temperature in the Yidun area is around 230°C while the reservoir temperature in the Litang area is around 200°C. Both hydrothermal systems are recharged by the meteoric water and are heated by the different deep, thermally and topographically driven convection heat along faults and undergoing subsurface boiling before going back to the surface.

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Section: Origin Of the Water By O And H Isotopementioning

confidence: 72%

Section: General Hydrogeochemistry the Water Chemistry Of The 24 Hotmentioning

confidence: 99%

Fluid Geochemistry of Fault Zone Hydrothermal System in the Yidun-Litang Area, Eastern Tibetan Plateau Geothermal Belt

Hou

Shi

2018

Geofluids

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“…All standard deviation values (AE) were recorded beside each concentration and showed variation in the seven tested samples as RAD7 depends on the Poisson distribution used to calculate the standard deviation [8]. The mechanism of transferring samples (aerating, type of water flow, travel time, and time of storage) is one of the critical reasons affecting the measured results [14,15]. These factors are the controlling variables affecting the radioactivity of the 222 Rn isotope.…”

Section: The Sample Analysismentioning

confidence: 99%

Statistical analysis of 222Rn concentration in Zamzam and other water sources in the Kingdom of Saudi Arabia

Aljaloud

El‐Batouti

2021

Heliyon

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In the present study, six water samples were collected from different locations in the Kingdom of Saudi Arabia and another sample from the Zamzam site in Makkah city. The concentration of the radioactive isotope 222 Rn was measured using the electronic radon detector (RAD7). The comparative analysis study on these samples showed that the average concentration value in all samples was 0.504Bq/L. The data analysis showed that the concentration of 222 Rn was ranged from 0.43 AE 0.06 Bq/L to 0.57 AE 0.060 Bq/L for all samples. These levels are below the contamination threshold (11.1 Bq/L) recommended by the US Environmental Protection Agency (EPA). Interestingly, Radon radioactivity levels were lower than those harmful to human health. The principal component analysis (PCA) using (SPSS version 15) was used to reduce the four variables influencing the 222 Rn activity concentration to two variables: temperature (correlation coefficient, R 2 : 0.984) and the relative humidity (RH%) (R 2 :-0.987). The increase in temperature reduces the solubility of 222 Rn gas activity water and facilitates its detection, whereas increased the RH% increases its solubility and decreases the detection level of 222 Rn activity concentration. The interaction between temperature and RH% does not affect the concentration of 222 Rn.

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“…Tritium contents below 1 TU suggest an ancient (older than 60 years of age) groundwater source, whereas values above 1 TU represent a modern (younger than 60 years of age) groundwater source [29]. Thus, the tritium values varying from 1.3 to 11.5 TU indicated a mixture of modern and old groundwater when ascending towards the surface [30,31].…”

Section: Source Of Rechargementioning

confidence: 99%

Hydrogeochemistry and Genesis Analysis of Thermal and Mineral Springs in Arxan, Northeastern China

Zhang

Cui

et al. 2017

Water

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Abstract:In this work, the hydrogeochemistry and environmental isotopic compositions of thermal and mineral springs in Arxan, northeastern China, were used to assess the genesis of the thermal system hosted by deep-seated faults. The reservoir temperature was calculated using the mineral saturation index and geothermometers. According to isotopic analysis, the spring water was of meteoric origin. Sixteen springs in the Arxan geothermal system with outlet temperatures ranging from 10.9 to 41.0 • C were investigated. The water samples can be classified into four groups by using a Piper diagram. The aquifer in which the Group I and Group III samples were obtained was a shallow cold aquifer of the Jurassic system, which is related to the local groundwater system and contains HCO 3 -Ca·Na groundwater. The Group II and Group IV samples were recharged by deeply circulating meteoric water with HCO 3 -Na and HCO 3 ·SO 4 -Na·Ca groundwater, respectively. The springs rise from the deep basement faults. The estimated thermal reservoir temperature is 50.9-68.8 • C, and the proportion of shallow cold water ranges from 54% to 87%. A conceptual flow model based on hydrogeochemical results and hydrogeological features is given to describe the geothermal system of the Arxan springs.

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Environmental Tritium (3H) and hydrochemical investigations to evaluate groundwater in Varahi and Markandeya river basins, Karnataka, India

Cited by 33 publications

References 46 publications

Fluid Geochemistry of Fault Zone Hydrothermal System in the Yidun-Litang Area, Eastern Tibetan Plateau Geothermal Belt

Fluid Geochemistry of Fault Zone Hydrothermal System in the Yidun-Litang Area, Eastern Tibetan Plateau Geothermal Belt

Statistical analysis of 222Rn concentration in Zamzam and other water sources in the Kingdom of Saudi Arabia

Hydrogeochemistry and Genesis Analysis of Thermal and Mineral Springs in Arxan, Northeastern China

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