The volcanic activity of La Soufrière of Guadeloupe (lesser antilles): structural and tectonic implications

Zlotnicki, J.; Boudon, Georges; Mouël, Jean‐Louis Le

doi:10.1016/0377-0273(92)90006-y

Cited by 41 publications

(54 citation statements)

References 14 publications

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“…Depending on the location of water tables along the crater walls, fluids are flowing towards the north or the south. For example, it is noteworthy that during the last 15 years the temperature decay at Echelle col borehole bottom is similar to Carbet-Echelle outcrop one (Zlotnicki et al, 1992). This temperature decrease and the disappearance of fumarolic activity should not be considered as a vanishing volcanic activity but rather as more difficult thermal convective exchanges issued from the magma supply.…”

Section: At Soufriere Dome Basismentioning

confidence: 86%

“…Only South crater remained active on Soufriere dome. Argillization became preponderant and constituted impermeable clayey beds (Pascaline et al,1982;Zlotnicki et al,1992). Soufriere dome was mainly the seat of meteoric waters going through the massif till argillous beds without any global thermal exchanges with deep hot sources (Pham et al, 1990 (Fig.…”

Section: The Phreatic 1956 Eruptionmentioning

confidence: 99%

“…1A and 1B) (Jolivet, 1958). The slow argillization is taking place in superficial geological beds (Pascaline et al, 1982;Pham et al, 1990;Zlotnicki et al, 1992). Superficial phreatic water tables are becoming isolated from each others.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Water Circulations on La Soufriere Volcano Inferred by Self-Potential Surveys (Guadeloupe, Lesser Antilles). Renew of Volcanic Activity?

Zlotnicki¹,

Feuillard

Hammouya

1994

J. geomagn. geoelec

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Section: At Soufriere Dome Basismentioning

confidence: 86%

Section: The Phreatic 1956 Eruptionmentioning

confidence: 99%

See 1 more Smart Citation

Water Circulations on La Soufriere Volcano Inferred by Self-Potential Surveys (Guadeloupe, Lesser Antilles). Renew of Volcanic Activity?

Zlotnicki¹,

Feuillard

Hammouya

1994

J. geomagn. geoelec

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“…A second model, proposed by Zlotnicki et al (1992), does not invoke physicochemical changes in the magma reservoir. Rather, it proposes that aquifers become isolated (sealed) by structural readjustments or deposition of impermeable clay minerals from hydrothermal activity.…”

Section: Volcanic Record Of La Soufrière Guadeloupementioning

confidence: 99%

“…The hydrothermal system could also be affected by tectonic and weather-related processes, although this was considered by the expert group to be low probability. Temperatures of fumaroles and hot springs had been measured since 1956 (Zlotnicki et al 1992). Limited gas chromatography data existed, but problems with sampling (reaction of gas species in the sample vial during and after sampling) make these unreliable measurements (Feuillard et al 1983).…”

Section: Observable Nodesmentioning

confidence: 99%

Retrospective analysis of uncertain eruption precursors at La Soufrière volcano, Guadeloupe, 1975–77: volcanic hazard assessment using a Bayesian Belief Network approach

et al. 2014

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Background: Scientists monitoring active volcanoes are increasingly required to provide decision support to civil authorities during periods of unrest. As the extent and resolution of monitoring improves, the process of jointly interpreting multiple strands of indirect evidence becomes increasingly complex. Similarities with uncertainties in medical diagnosis suggest a formal evidence-based approach, whereby monitoring data are analysed synoptically to provide probabilistic hazard forecasts. A statistical tool to formalize such inferences is the Bayesian Belief Network (BBN). By explicitly representing conditional dependencies between the volcanological model and observations, BBNs use probability theory to treat uncertainties in a rational and auditable manner, as warranted by the strength of the scientific evidence. A retrospective analysis is given for the 1976 Guadeloupe crisis, using a BBN to provide inferential assessment of the state of the evolving magmatic system and probability of incipient eruption. Conditional dependencies are characterized quantitatively by structured expert elicitation. Results: Analysis of the available monitoring data suggests that at the height of the crisis the probability of magmatic intrusion was high, in accordance with scientific thinking at the time. The corresponding probability of magmatic eruption was elevated in July and August 1976 and signs of precursory activity were justifiably cause for concern. However, collective uncertainty about the future course of the crisis was also substantial. Of all the possible scenarios, the most likely outcome evinced by interpretation of observations on 31 August 1976 was 'no eruption' (mean probability 0.5); the chance of a magmatic eruption/blast had an estimated mean probability of~0.4. There was therefore no evidential basis for asserting one scenario to be significantly more likely than another.

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The Influence of Episodic Shallow Magma Degassing on Heat and Chemical Transport in Volcanic Hydrothermal Systems

Chen

Zhan

Burns

et al. 2018

Geophysical Research Letters

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Springs at La Soufrière of Guadeloupe have been monitored for nearly four decades since the phreatic eruption and associated seismic activity in 1976. We conceptualize degassing vapor/gas mixtures as square‐wave sources of chloride and heat and apply a new semianalytic solution to demonstrate that chloride and heat pulses with the same timing and duration result in good matches between measured and simulated spring temperatures and concentrations. While the concentration of chloride pulses is variable, the local boiling temperature of 96°C was assigned to all thermal pulses. Because chloride is a conservative tracer, chloride breakthrough is only affected by one‐dimensional advection and dispersion. The thermal tracer is damped and lagged relative to chloride due to conductive heat exchange with the overlying and underlying strata. Joint analysis of temperature and chloride allows estimation of the onset and duration of degassing pulses, refining the chronology of recent magmatic intrusion.

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The volcanic activity of La Soufrière of Guadeloupe (lesser antilles): structural and tectonic implications

Cited by 41 publications

References 14 publications

Water Circulations on La Soufriere Volcano Inferred by Self-Potential Surveys (Guadeloupe, Lesser Antilles). Renew of Volcanic Activity?

Water Circulations on La Soufriere Volcano Inferred by Self-Potential Surveys (Guadeloupe, Lesser Antilles). Renew of Volcanic Activity?

Retrospective analysis of uncertain eruption precursors at La Soufrière volcano, Guadeloupe, 1975–77: volcanic hazard assessment using a Bayesian Belief Network approach

The Influence of Episodic Shallow Magma Degassing on Heat and Chemical Transport in Volcanic Hydrothermal Systems

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