Chemical and isotopic characteristics of geothermal fluids from Sulphur Springs, Saint Lucia

Joseph, E. P.; Fournier, N.; Lindsay, Jan M.; Robertson, R. E. A.; Beckles, Denise M.

doi:10.1016/j.jvolgeores.2012.12.013

Cited by 31 publications

(15 citation statements)

References 42 publications

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“…3a and b), there was a positive correlation between SO 4 and Ca concentrations and TDS, suggesting that the composition of thermal groundwater had possibly been influenced by the leaching of host rocks containing gypsum and/or anhydrite (Mohammadi et al, 2010;Taran et al, 1998;Taran and Peiffer, 2009). Additionally, the SO 4 /Ca molar ratios in thermal groundwater were slightly greater than 1, indicating that the SO 4 composition in thermal water was not only coming from evaporite deposits (e.g., gypsum and/or anhydrite dissolution), but also contributed by sulphur from sulphide deposits and hydrothermal gases (principally H 2 S) (Joseph et al, 2013). Pyrite which can be oxidized to form sulphate, are often found in the Carboniferous and Permian coal seams, and sulphate can enter thermal groundwater through faults (Zhang, 2011).…”

Section: Hydrochemical Characteristics Of Thermal Groundwatermentioning

confidence: 99%

Hydrochemical characteristics and geothermometry applications of thermal groundwater in northern Jinan, Shandong, China

et al. 2015

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Section: Hydrochemical Characteristics Of Thermal Groundwatermentioning

confidence: 99%

Hydrochemical characteristics and geothermometry applications of thermal groundwater in northern Jinan, Shandong, China

et al. 2015

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“…Gas sampling was done using the Giggenbach flask ( Fig. 2), an evacuated glass-bottle filled with 4 N NaOH [11]. Steam from fumaroles is condensed inside the bottle, while acidic gases, i.e., CO 2 and H 2 S, will be dissolved in NaOH solution as carbonate and sulfide.…”

Section: Gas Samplingmentioning

confidence: 99%

Isotope and Geochemistry Characterization of Hot Springs and Cold Springs of Sembalun – Rinjani Area, East Lombok, West Nusa Tenggara – Indonesia

Satrio¹,

Prasetio²,

Alam³

et al. 2020

Indones. J. Chem.

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The presence of several hot springs in Sembalun – Rinjani, East Lombok, West Nusa Tenggara is an indicator of geothermal potential in the area. This study aims to determine the characteristics of hot springs and cold springs and also the geothermal potential in Sembalun – Rinjani area using isotopes and geochemistry methods. The result of d18O and d2H stable isotopes analysis shows that most of the hot springs are meteoric water. Except for Kalak hot spring, other hot springs are a mixing product of meteoric water and andesitic water, with meteoric water composition between 64 to 87%. While 14C radioisotope suggests that the age of hot springs in the Sembalun area is about 10,000–12,000 years BP, the surrounding cold springs are mostly Modern except Jorong cold spring. The results of gas analysis (He, Ar, and Ne) also suggest the same origin of geothermal fluid, i.e., meteoric water origin. Based on chemical composition, Kalak hot spring is plotted as sulfate type water, while Sebau hot spring is plotted near mature water composition but not representing reservoir fluid due to its relatively low temperature and high Mg content. Na/K geothermometer calculation from Sembalun area shows that subsurface temperature is varied between 111-161 °C, while from Rinjani hot springs indicates higher subsurface temperature, i.e., 250-260 °C. It is estimated that reservoir fluid has high TDS with chloride content up to 4000 mg/L.

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“…Apart from geothermal temperature, the geochemical study also informs the origin of the geothermal system and geochemical processes that affect the fluid's temperature. Recently, geochemical studies on geothermal systems have been many conducted in various sites around the world, including Kangding in the eastern Himalayas [14]; the Icelandic high-temperature geothermal areas [15]; the western sector of the Sabatini Volcanic District and the Tolfa Mountains (Italy) [16]; the Xining basin on the northeastern Tibetan Plateau [17]; Mapamyum in Western Tibet, China [18]; the Tang-Bijar oilfield springs in the Zagros region of Iran [19]; southern Saint Lucia, in the Lesser Antilles island arc [20]; the Southern Sula graben in Honduras [21]; and the Nevşehir (Kozakli) area in Central Turkey [22].…”

Section: Introductionmentioning

confidence: 99%

Geochemistry Exploration and Geothermometry Application in the North Zone of Seulawah Agam, Aceh Besar District, Indonesia

et al. 2019

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A geochemistry study has been done in four geothermal manifestations—Ie-Seu’um, Ie-Brôuk, Ie-Jue and the Van-Heutz crater—located in the north zone of Seulawah Agam mountain (Aceh Besar District, Indonesia). The study was performed through water and gas analysis. Water analysis were done for all geothermal manifestations, but gas analysis was only done for the Ie-Jue manifestation that has fumaroles. Cation and anion contents were analyzed by ion chromatography, ICP-OES, alkalimetry titrations, and spectrophotometry, meanwhile isotopes were measured by a Liquid Water Isotope Analyzer. The resulting data were used for fluid and gas geothermometry calculations, and plotted in a FT-CO2 Cross-Plot and a CH4-CO2-H2S triangle diagram to obtain reservoir temperatures. The data were also plotted by a Cl-HCO3-SO4 triangle and Piper diagram to obtain the water type and dominant chemical composition, a Na-K-Mg triangle diagram to obtain fluid equilibria, the isotope ratio in the stable isotope plot to obtain the origin of water, and a N2-He-Ar triangle diagram to establish the origin of fumaroles. The water analysis results showed that (1) Ie-Seu’um has an average reservoir temperature of 241.9 ± 0.3 °C, a chloride water type, a dominant Na-K-Cl chemical composition, a mature water fluid equilibrium, and water of meteoric origin; (2) Ie-Brôuk has an average reservoir temperature of 321.95 ± 13.4 °C, a bicarbonate water type, a dominant Na-Ca-HCO3chemical composition, an immature water fluid equilibrium, and water of meteoric origin; (3) Ie-Jue has an average reservoir temperature of 472.4 ± 91.4 °C, a sulphate water type, a dominant Ca-SO4 chemical composition, an immature water fluid equilibrium and water of meteoric origin; and (4) the Van-Heutz crater has an average reservoir temperature of 439.3 ± 95.3 °C, a sulphate water type, a dominant Ca-SO4 chemical composition, an immature water fluid equilibrium and water of magmatic origin. The results of our gas analysis showed that Ie-Jue has an average reservoir temperature of 258.85 °C, and water of meteoric origin. Based on the reservoir temperatures, the geothermal manifestation of the north zone of Seulawah Agam mountain is considered as a high-temperature geothermal system suitable for power plant development.

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Chemical and isotopic characteristics of geothermal fluids from Sulphur Springs, Saint Lucia

Cited by 31 publications

References 42 publications

Hydrochemical characteristics and geothermometry applications of thermal groundwater in northern Jinan, Shandong, China

Hydrochemical characteristics and geothermometry applications of thermal groundwater in northern Jinan, Shandong, China

Isotope and Geochemistry Characterization of Hot Springs and Cold Springs of Sembalun – Rinjani Area, East Lombok, West Nusa Tenggara – Indonesia

Geochemistry Exploration and Geothermometry Application in the North Zone of Seulawah Agam, Aceh Besar District, Indonesia

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