Hydrothermal circulation beneath Mount Pelée inferred by self potential surveying. Structural and tectonic implications

Zlotnicki, J.; Boudon, Georges; Viodé, J. P.; Delarue, J.F.; Mille, A.; Bruère, F.

doi:10.1016/s0377-0273(98)00030-4

Cited by 49 publications

(30 citation statements)

References 31 publications

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“…However, the groundwater flow direction can be characterized through the self-potential elevation gradient (see Section 4.1) (Lénat, 2007). Therefore, as in other studies (e.g., Zlotnicki et al, 1998;Lénat, 2007;Finizola et al, 2009 and references therein) and independent of its chemical composition, groundwater flow will be separated into two groups based on the flow direction:…”

Section: Groundwater Flow In Active Calderasmentioning

confidence: 99%

“…On active volcanoes, hydrogeological structures are always complex and groundwater flow may be vertically stratified in several layers, which may be connected through vertical water flow along faults and geological discontinuities (e.g., Zlotnicki et al, 1998;Finizola et al, 2002;Pribnow et al, 2003;Bruno et al, 2007). Very often within the hydrogeological structure, one or several hydrothermal systems may be present and supported by the volcanic heat/gas flow rising through the edifice (Finizola et al, 2002;Pribnow et al, 2003).…”

Section: Groundwater Flow In Active Calderasmentioning

confidence: 99%

“…Self-potential (SP) is a passive electrical method which measures the natural electrical current present in the ground and is commonly used to investigate groundwater flow direction (Corwin and Hoover, 1979;Ishido and Mizutani, 1981;Zlotnicki et al, 1994Zlotnicki et al, , 1998Finizola et al, 2002;Zlotnicki and Nishida, 2003;Lénat, 2007;Jouniaux et al, 2009 and references therein). A natural electrical current is generated by a number of different processes which include several physical and chemical phenomena.…”

Section: Self-potentialmentioning

confidence: 99%

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A geochemical and geophysical investigation of the hydrothermal complex of Masaya volcano, Nicaragua

Mauri

Williams‐Jones

Saracco

et al. 2012

Journal of Volcanology and Geothermal Research

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a b s t r a c t KeywordsMasaya Hydrothermal Self-potential Wavelet Groundwater Volcano Masaya volcano, Nicaragua, is a persistently active volcano characterized by continuous passive degassing for more than 150 years through the open vent of Santiago crater. This study applies self-potential, soil CO 2 and ground temperature measurements to highlight the existence of uprising fluids associated to diffuse degassing structures throughout the volcano. The diffuse degassing areas are organized in a semi-circular pattern and coincide with several visible and inferred surface volcanic structures (cones, fissure vents) and likely consist of a network of buried faults and dykes that respectively channel uprising flow and act as barrier to gravitational groundwater flow. Water depths have been estimated by multi-scale wavelet tomography of the self-potential data using wavelets from the Poisson kernel family. Compared to previous water flow models, our water depth estimates are shallower and mimic the topography, typically less than 150 m below the surface. Between 2006 and 2010, the depths of rising fluids along the survey profiles remained stable suggesting that hydrothermal activity is in a steady state. This stable activity correlates well with the consistency of the volcanic activity expressed at the surface by the continuously passive degassing. When compared to previous structural models of the caldera floor, it appears that the diffuse degassing structures have an important effect on the path that shallow groundwater follows to reach the Laguna de Masaya in the eastern part of the caldera. The hydrogeological system is therefore more complex than previously published models and our new structural model implies that the flow of shallow groundwater must bypass the intrusions to reach the Laguna de Masaya. Furthermore, these diffuse degassing structures show clear evidence of activity and must be connected to a shallow magmatic or hydrothermal reservoir beneath the caldera. As such, the heat budget for Masaya must be significantly larger than previously estimated.

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Section: Groundwater Flow In Active Calderasmentioning

confidence: 99%

Section: Groundwater Flow In Active Calderasmentioning

confidence: 99%

Section: Self-potentialmentioning

confidence: 99%

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A geochemical and geophysical investigation of the hydrothermal complex of Masaya volcano, Nicaragua

Mauri

Williams‐Jones

Saracco

et al. 2012

Journal of Volcanology and Geothermal Research

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show abstract

“…Self-potential (SP) surveys have been conducted in many volcanoes of subduction zones (e.g., Nishida and Tomiya, 1987;Sasai et al, 1997;Di Maio et al, 1998) as well as of hotspots (e.g., Zablocki, 1976;Michel and Zlotnicki, 1998). A positive sense anomaly of about a few hundreds to more than a thousand millivolts was detected on most of those volcanoes.…”

Section: Introductionmentioning

confidence: 99%

Self-potential anomaly of Satsuma-Iwojima volcano

Kanda

Mori

2014

Earth Planet Sp

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We conducted self-potential (SP) surveys twice at Satsuma-Iwojima volcano where an intense fumarolic activity continued for more than 1000 years from a summit crater of Iwodake, a lava dome of rhyolite. A positive anomaly of 200 ∼ 250 mV was detected on the Iwodake edifice, although the survey area was limited because of the steep topography and existence of high temperature fumaroles. The anomaly seems to be centered at the summit crater of Iwodake and can roughly be explained by a pair of conduction current source and sink located around the sea level beneath the summit crater. Depth of the current source might indicate the upper end of a liquid-phase water upflow zone, where the liquid-phase water vaporizes due to heat and depressurization. The above model does not explain the additional positive SP anomaly around the summit crater and on the western flank. The anomaly around the summit might be caused by suppression of meteoric water downflow by high temperature volcanic gases. The positive anomaly on the western flank might be caused by local fluid upflows associated with fumaroles on the flank.

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“…Examples include positive anomalies of as much as 2300 mV in amplitude and about 1 km in width measured on Kilauea volcano, Hawaii by Zablocki (1976); a negative anomaly of about 200 mV amplitude and about 1 km in width at the northwest edge of Dunes thermal area (Combs and Wilt, 1976); a steepsided positive anomaly of about 30 mV amplitude and 2 km in width over the Mud Volcano area of Yellowstone National Park (Zohdy et al, 1973); a dipolar anomaly covering over 15 km and about 900 mV peak-to-peak amplitude over a postulated resurgent dome in Long Valley, California (Anderson and Johnson, 1976); a negative anomaly of about 60 mV amplitude and 3 km in width centered over the Leach Hot Springs area of Grass Valley (Corwin, 1976), a well-developed dipolar anomaly of about 160 mV peak-to-trough amplitude; and peak-to-trough distance of about 7 km at Cerro Prieto geothermal field in Baja California (Corwin et al ,1980;and Fitterman and Corwin, 1982); negative SP anomalies, down to -1700 mV, with high gradients (1.83 mV/m) on Mount Pelee volcano due to a hydrothermal system, and a positive SP anomaly, up to 200 mV caused by two active hot springs (Zlotnicki et al, 1998).…”

Section: Historical Application Of the Methodsmentioning

confidence: 95%

Investigation of novel geophysical techniques for monitoring CO<sub>2</sub> movement during sequestration. Final report, CRADA

Hoversten¹,

Gasperikova²

2003

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Hydrothermal circulation beneath Mount Pelée inferred by self potential surveying. Structural and tectonic implications

Cited by 49 publications

References 31 publications

A geochemical and geophysical investigation of the hydrothermal complex of Masaya volcano, Nicaragua

A geochemical and geophysical investigation of the hydrothermal complex of Masaya volcano, Nicaragua

Self-potential anomaly of Satsuma-Iwojima volcano

Investigation of novel geophysical techniques for monitoring CO<sub>2</sub> movement during sequestration. Final report, CRADA

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