Quantitative interpretation of chemical characteristics of hydrothermal systems

Ellis, A. J.

doi:10.1016/0375-6505(70)90050-7

Cited by 201 publications

(87 citation statements)

References 17 publications

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“…These effects have been observed previously in geothermal systems (Ellis, 1970;Arnorsson, 1974;Kristmannsdottir and Tomasson, 1974) .and in deep-sea sediment pore fluids (Gieskes, 1973).…”

Section: Sea Water Effectssupporting

confidence: 79%

“…The Na/K ratio in natural hot waters is controlled by a reversible temperature-dependent rock mineral equilibrium involving potash mica, potash feldspar, and albite (Ellis, 1970). Experimental high-temperature rock/water interactions Mahon, 1964, 1967), field" results, and the results of Hemley and Jones (1964) have enabled an approximate relationship to be established between the Na/K ratio in natural hot waters and temperature.…”

Section: Sea Water Effectsmentioning

confidence: 99%

“…With cooling of water (e.g., through boiling on rising toward the surface), the Na/K exchange reaction is slower to readjust than the silica equilibrium (Ellis, 1970).…”

Section: Sea Water Effectsmentioning

confidence: 99%

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Hydrology and geochemistry of a Hawaiian geothermal system: HGP-A

Kroopnick¹,

Buddemeier²,

Thomas³

et al. 1978

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“…These effects have been observed previously in geothermal systems (Ellis, 1970;Arnorsson, 1974;Kristmannsdottir and Tomasson, 1974) .and in deep-sea sediment pore fluids (Gieskes, 1973).…”

Section: Sea Water Effectssupporting

confidence: 79%

Section: Sea Water Effectsmentioning

confidence: 99%

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Hydrology and geochemistry of a Hawaiian geothermal system: HGP-A

Kroopnick¹,

Buddemeier²,

Thomas³

et al. 1978

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“…En relación con el cuarzo todas las muestras se encuentran saturadas con respecto a este mineral -al igual que ocurre en el acuífero próximo del Alto Guadalentín (Cerón y Pulido Bosch, en preparación)-lo que sería congruente con lo expuesto por numerosos autores como White (1970), Ellis (1970), Arnorsson (1975) y Auqué el al. (1986 y 1988), para quienes las aguas termales están saturadas con respecto a la sílice y en equilibrio con el cuarzo; todas las muestras están saturadas en calcedonia y subsaturadas en cristobalita.…”

Section: Interpretaciónunclassified

Untitled

1993

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RESUMENSe estudian las principales características físico-químicas de algunas aguas termominerales del acuífero detrítico de Alhama de Murcia cuya temperatura está comprendida entre 26 y 41°e y son de facies clorurada-sulfatada cálcico-magnésica. El origen de los iones encontrados está relacionado con la disolución de materiales evaporíticos, sales sulfatadas y cloruradas, carbonatados y silicatados, procesos de contaminación agrícola y la existencia de posibles mineralizaciones. Existen procesos de cambio de bases. Los estados de equilibrio termodinámico en las condiciones de surgencia, estudiados mediante el programa SOL-MINEQ.88, indican que todas las muestras están saturadas en cuarzo, calcedonia y albita, casi todas en calcita, aragonito, dolomita, yeso, barita y magnesita, y todas subsaturadas en cristobalita,anhidrita y fluorita. Las temperaturas de base obtenidas mediante diferentes geotermómetros cubren una amplia gama; los geotermómetros calcita-dolomita y anhidrita-fluorita son aplicables sólo a dos muestras con resultados anómalos. La modelización de los índices de saturación a temperaturas crecientes muestra un equilibrio del cuarzo, calcedonia, albita, sanidina, yeso, anhidrita, gibbsita y halloisita entre los 80-110 0e. La dispersión de valores indicada por ambas metodologías se debería a fenómenos de dilución por mezcla de aguas más superficiales, efectos de reequilibrio entre los minerales y el agua, y pérdida de CO 2 . La temperatura y composición química de las aguas indican que existe una anomalía térmica importante relacionada con la actividad tectónica del área.Palabras clave: hidrogeoquímica, aguas termominerales, acuífero detrítico, neotectónica, modelización geoquímica, geotermómetros. ABSTRACTThe principal physico-chemical characteristics of sorne thermomineral waters of Alhama de Murcia detrital aquifer are studied. The waters show a temperature between 26-41°e and they are calcium-magnesium chloride-sulphate type. The origin of ions has a direct relationship with the dissolution of evaporitic sulphate-chloride salts, carbonatic and silica rocks, agricultural contamination processes and possibly ore-deposits. Mixing processes with cold waters possibly also occur. By SOLMINEQ.88 program the thermodinamic equilibrium conditions in surface are studied; the samples are saturated in quartz, chalcedony and albite. A great part of the waters are also saturated in calcite, aragonite, dolomite, gypsum, barite and magnesite. Finally, the waters are undersaturated in cristobalite, anhydrite and fluorite. Conventional chemical geothermometers yield a broad range of temperatures. Both, calcite-dolomite and anhydrite-fluorite geothermometers was applied to two samples with anomalous results. The saturation index modeling, at a series of growing temperatures, shows an approach equilibrium with quartz, chalcedony, albite, sanidine, gipsum, anhydrite, gibbsite and halloisite between 80-110°e. A spread in the apparent equilibration temperatures deduced from two metodology, should be a consequence of dil...

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“…In Table 2 are reported the temperatures calculated with different geothermometers: Chalcedony geothermometer (Truesdell, 1975); Sodium potassium geothermometer (White, 1965;Ellis, 1970), using either an empirical thermometric relationship (Michard, 1979) or the relationship derived from thermodynamic data of albite and adularia; Sodium-lithium geothermometer (Fournier and Truesdell, 1973).…”

Section: Contrarymentioning

confidence: 99%

Equilibria and geothermometry in hot alkaline waters from granites of S.W. Bulgaria.

Michard¹,

Sanjuan²,

Criaud³

et al. 1986

Geochem. J.

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Sixteen hot alkaline waters from geothermal drillholes in S. W. Bulgaria have been studied. Nine of them are in approximate equilibrium with chalcedony, albite, adularia, calcite, kaolinite, and low temperature calcium zeolite at a temperature close to the outflow temperature. The others are in equili brium with calcite and kaolinite and oversaturated with albite, chalcedony and adularia at the outflow temperature.Calculations of the evolution of chemical species due to the cooling indicate that equilibrium with these minerals is established at a temperature close to the temperature derived from the chemical geothermometers.

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Quantitative interpretation of chemical characteristics of hydrothermal systems

Cited by 201 publications

References 17 publications

Hydrology and geochemistry of a Hawaiian geothermal system: HGP-A

Hydrology and geochemistry of a Hawaiian geothermal system: HGP-A

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Equilibria and geothermometry in hot alkaline waters from granites of S.W. Bulgaria.

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