Fluid-volcano interaction in an active stratovolcano: the crater lake system of Poás volcano, Costa Rica

Rowe, Gary L.; Brantley, Susan L.; Fernández, Mario; Fernández, José; Borgia, Andrea; Barquero, Jorge

doi:10.1016/0377-0273(92)90003-v

Cited by 166 publications

(126 citation statements)

References 44 publications

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“…However, a rough estimate can be derived based on estimated time required to alter volcanics at other hydrothermal systems. At Poás volcano Rowe et al (1992) estimated a rate of rock dissolution of ~1650 m 3 /year. This is a small system compared to Nevado del Ruiz volcano, where Lopez and Williams (1993) estimated a rock dissolution rate up to 12600 m 3 /year.…”

Section: Discussionmentioning

confidence: 99%

Interpretation of gravity and magnetic anomalies at Lake Rotomahana: Geological and hydrothermal implications

Tontini

Ronde

Scott

et al. 2016

Journal of Volcanology and Geothermal Research

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Section: Discussionmentioning

confidence: 99%

Interpretation of gravity and magnetic anomalies at Lake Rotomahana: Geological and hydrothermal implications

Tontini

Ronde

Scott

et al. 2016

Journal of Volcanology and Geothermal Research

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“…The diagram shows that vapor separated from acidic chloride solution contains high HCl and the concentration of HCl becomes similar to that of high-temperature volcanic (magmatic) vapors (e.g., Taran and Zelenski, 2014). We believe that this is the case for Ebeko, as well as for the Poas low-temperature fumaroles (Rowe et al, 1992;Vaselli et al, 2003;Fischer et al, 2015). The presence a ) The gas content for Well P2 (mmol/mol) was calculated using Ar concentration following the method described in Taran (2005).…”

Section: Gas Geochemistry and Equilibriamentioning

confidence: 99%

“…An inserted ternary plot in Fig. 9 compares the data points for Poas, Ruapehu and Copahue crater lakes (Rowe et al, 1992;Christenson and Wood, 1993;Varekamp et al, 2001) with the data for the Ebeko + Yurieva composition.…”

Section: Water Chemistry: Major Componentsmentioning

confidence: 99%

“…The system is similar to other areas where acidic water represents crater lakes and associated shallow aquifers. Examples include those at Poas, Copahue, Kawah Ijen (Rowe et al, 1992;Varekamp et al, 2001;Delmelle et al, 2000). In the case of Ebeko, the acidic water is concealed at a considerable depth.…”

Section: Conceptual Model Of the Ebeko-yurievskie Volcano-hydrothermamentioning

confidence: 99%

See 1 more Smart Citation

Volcano–hydrothermal system of Ebeko volcano, Paramushir, Kuril Islands: Geochemistry and solute fluxes of magmatic chlorine and sulfur

Kalacheva

Taran

Котенко

et al. 2016

Journal of Volcanology and Geothermal Research

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Ebeko volcano at the northern part of Paramushir Island in the Kuril island arc produces frequent phreatic eruptions and relatively strong fumarolic activity at the summit area~1000 m above sea level (asl). The fumaroles are characterized by low-temperature, HCl-and S-rich gas and numerous hyper-acid pools (pH b 1) without drains. At~550 m asl, in the Yurieva stream canyon, many hot (up to 87°C) springs discharge ultra-acidic (pH 1-2) SO 4 -Cl water into the stream and finally into the Sea of Okhotsk. During quiescent stages of degassing, these fumaroles emit 1000-2000 t/d of water vapor, b 20 t/d of SO 2 and b 5 t/d of HCl. The measurement of acidic hot Yurieva springs shows that the flux of Cl and S, 60-80 t/d each, is independent on the volcanic activity in the last two decades. Such high flux of Cl is among the highest ever measured in a volcano-hydrothermal system. Oxygen and hydrogen isotopic composition of water and Cl concentration for Yurieva springs show an excellent positive correlation, indicating a mixing between meteoric water and magmatic vapor. In contrast, volcanic gas condensates of Ebeko fumaroles do not show a simple mixing trend but rather a complicated data suggesting evaporation of the acidic brine. Temperatures calculated from gas compositions and isotope data are similar, ranging from 150 to 250°C, which is consistent with the presence of a liquid aquifer below the Ebeko fumarolic fields. Saturation indices of non-silicate minerals suggest temperatures ranging from 150 to 200°C for Yurieva springs. Trace elements (including REE) and Sr isotope composition suggest congruent dissolution of the Ebeko volcanic rocks by acidic waters. Waters of Yurieva springs and waters of the summit thermal fields (including volcanic gas condensates) are different in Cl/SO 4 ratios and isotopic compositions, suggesting complicated boiling-condensationmixing processes.

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“…El crá-ter principal, de forma subcónica irregular y con un diámetro de 1,3 km y 320 m de profundidad, presenta dos particularidades: (a) una laguna áci-da (pH=0) de unos 300 m de diámetro, con una temperatura entre 30 y 60º C, cuyo volumen, temperatura y propiedades químicas varían con el régimen pluviométrico y la actividad volcáni-ca (Brown et al, 1989;Rowe et al, 1992aRowe et al, , 1992b y (b) un domo situado al sureste de la laguna. Este domo se eleva 40 m sobre la laguna y se formó durante la erupción freatomagmática y magmática de 1953de -1954de (Casertano et al, 1985de , 1987Rowe et al, 1992a). En el flanco noroeste del domo se localizan numerosas fumarolas activas de temperatura e intensidad variable.…”

Section: Introductionunclassified

Emisión difusa de hidrógeno en el Volcán Poás, Costa Rica

Melián

Galindo

Pérez

et al. 2011

Rev. Geol. Amér. Central

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ABSTRACT:We report the results of the study of diffuse H 2 emission from Poás volcano, Costa Rica. Three surveys were carried out in 2000, 2001 and 2002, to investigate soil H 2 distribution in and around Poás summit crater and to evaluate diffuse H 2 emission as a potential geochemical tool for the Poás volcano monitoring program. Soil H 2 contents showed a wide range of concentrations from 0.4 to 7,059 ppmV. Most of the study area showed low levels of H 2 in the soil atmosphere, and the highest values of soil gas H 2 were just observed inside the summit crater of Poás volcano for the 2001 and 2002 surveys. These surface geochemical changes coincide with an increase of the fumarolic activity as well as soil temperature rose inside the crater during this study. The results here reported suggest changes in the Poás volcanic-hydrothermal system, therefore monitoring diffuse H 2 emission could be useful for the volcanic surveillance of Poás volcano.Keywords: Poás volcano, hydrogen, diffuse emission, volcano surveillance, main crater, fumaroles, volcanichydrothermal system. RESUMEN:Se presentan los resultados obtenidos del estudio de las emanaciones difusas de H 2 en el volcán Poás, Costa Rica. Este estudio ha implicado la realización de tres campañas en los años 2000, 2001 y 2002, con la finalidad de investigar la distribución espacial de la concentración de H 2 en el gas del suelo y evaluar la desgasificación difusa de esta especie como una herramienta geoquímica para el programa de vigilancia volcánica del Poás. Las concentraciones de H 2 en el gas del suelo medidas presentan un amplio rango de valores que van desde 0,4 a 7059 ppmV. La mayor parte del área de estudio reflejó contenidos relativamente bajos de H 2 en el gas del suelo, mientras que las concentraciones más altas se midieron en el interior del cráter principal durante los años 2001 y 2002. Desde la campaña del 2001 se ha observado un aumento relativo del contenido de H 2 en el gas del suelo del interior del cráter principal, coincidiendo en el tiempo con un incremento de la actividad fumarólica y de la temperatura en los suelos. Estos resultados pueden indicar la existencia de cambios en el sistema volcánico-hidrotermal del Poás, por lo que el monitoreo de las emanaciones difusas de H 2 podría ser útil para mejorar el programa de vigilancia volcánica.Palabras clave: Volcán Poás, hidrógeno, emisión difusa, vigilancia volcánica, cráter principal, fumarolas, sistema volcánico-hidrotermal.

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Fluid-volcano interaction in an active stratovolcano: the crater lake system of Poás volcano, Costa Rica

Cited by 166 publications

References 44 publications

Interpretation of gravity and magnetic anomalies at Lake Rotomahana: Geological and hydrothermal implications

Interpretation of gravity and magnetic anomalies at Lake Rotomahana: Geological and hydrothermal implications

Volcano–hydrothermal system of Ebeko volcano, Paramushir, Kuril Islands: Geochemistry and solute fluxes of magmatic chlorine and sulfur

Emisión difusa de hidrógeno en el Volcán Poás, Costa Rica

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