Surficial clay assemblage associated with the hydrothermal activity of Bouillante (Guadeloupe, French West Indies)

Patrier, Patricia; Beaufort, Daniel; Mas, Amédée; Traineau, Hervé

doi:10.1016/s0377-0273(03)00133-1

Cited by 15 publications

(9 citation statements)

References 24 publications

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“…The boulders consist of hydrothermal breccias that are particularly rich in secondary K-feldspar, a silicate mineral that has never been reported in the other alteration parageneses identified in other parts of the geothermal field or in the Basse-Terre island. Indeed, the hydrothermal alteration of the surficial part of the geothermal field consists of dioctahedral smectites, zeolites and calcite [Patrier et al, 2003] and the volcanogenic rocks crosscut in depth by the exploration drill holes display a wide zone of propylitic alteration (chlorite, Ca-silicates, quartz and minor calcite) locally overprinted by phyllic (in the reservoir) to argillic (in the caprock) alteration assemblages (smectite, illite ± I-S mixed layers, quartz, calcite, hematite or pyrite) close to the faults and fractures that controlled the circulation of geothermal fluids [Mas et al, 2006]. By contrast, the hydrothermal alterations described at La Soufrière volcano are typical of alterations by low-temperature acidic fluids (smectite + silica polymorphs ± pyrite/jarosite ± gypsum) [Salaun et al, 2011].…”

Section: Discussionmentioning

confidence: 99%

“…In a limited area at the surface, high temperature fluid circulations are suspected to be the cause of the secondary paragenesis (K feldspars, illite/smectite mixed layers) identified by XRD of breccias sampled in Anse Marsolle [Patrier et al, 2003]. This alteration paragenesis is investigated in the present paper.…”

Section: Geothermal Fluids and Surficial Expression Of The Geothermalmentioning

confidence: 91%

“…However, some questions remain especially in terms of heat source and spatio-temporal evolution of the system. Surficial mineralogical parageneses in this area are typical of low temperature alteration (100 o C) with the occurrence of dioctahedral aluminous smectites ± calcite ± silica ± kaolinite superimposed on zeolites (mainly clinoptiloliteheulandite, stilbite, mordenite), as an evidence of the cap rock of the geothermal system [Patrier et al, 2003]. However, some samples of highly silicified breccias containing high temperature minerals (K feldspars, illite/smectite mixed layers) can be found in the central part of the geothermal field in the north of the Bouillante bay (Anse Marsolle).…”

Section: Introductionmentioning

confidence: 93%

“…In a third stage, argillic assemblages took place after boiling ceased and hydrothermal fluids were progressively neutralized by mixing with surficial waters (meteoric/marine). Finally, outcropping rocks are presently submitted to supergene alteration (weathering) with crystallization of a second generation of jarosite, associated with kaolinite/smectite mixed layers in atmospheric conditions [Patrier et al, 2003].…”

Section: Post-eruption Cooling Historymentioning

confidence: 99%

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Occurrence of K-feldspar-bearing hydrothermal breccias in the Bouillante geothermal field (Basse Terre – Guadeloupe)

Patrier

Bruzac

Pays

et al. 2013

Bulletin De La Société Géologique De France

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International audienceSurficial indicators of recent to present geothermal activity are present around Bouillante (Guadeloupe, French West Indies). Until lately, most mineralogical parageneses identified in this area were typical of low temperature alteration (< 100°C) with the occurrence of dioctahedral aluminous smectites accompanied by zeolites (heulandite-clinoptilolite) ± calcite ± silica ± kaolinite, as an evidence of the cap rock of the geothermal system. Recently, numerous boulders of highly silicified breccias containing high temperature minerals (> 200°C) have been identified in the Bouillante bay (Anse Marsolle). Their petrographic study revealed several hydrothermal parageneses typical of a multistage alteration process. Stage 1) An early potassic alteration facies typical of a high-temperature geothermal system characterized by K-feldspar/adularia + quartz + pyrite. K-feldspars have been shown to be present both in the clasts (replacement) and cement of these breccias. They are associated with quartz whose textural properties have revealed fracturing associated with boiling. Stage 2) An acid-sulphate advanced argillic alteration facies with the occurrence of jarosite, gypsum ± silica (≥ 150°C) as usually observed in the upper part of epithermal systems worldwide as marker of deeper boiling. Stage 3) An argillic alteration facies (illite/smectite mixed layers ± smectite ± calcite). With temperatures typically ranging from 100 to 200°C, this alteration facies is associated with near neutral fluids of mainly meteoric origin as known in the present geothermal reservoir (pH = 5.4). This alteration is the later one as evidenced by petrographic observations. These results highlight mineral assemblages and mineral textures characteristic of high temperature hydrothermal alteration in epithermal settings. The occurrence of these breccias involved the existence of eruptive events (magmatic/hydrothermal explosion) which ejected this material. Isotopic (oxygen, argon) and geochemical (trace elements) studies are now necessary to clarify the timing of these breccias and the nature and the connection of the original fluids with current geothermal fluid

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Section: Discussionmentioning

confidence: 99%

Section: Geothermal Fluids and Surficial Expression Of The Geothermalmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 93%

Section: Post-eruption Cooling Historymentioning

confidence: 99%

See 2 more Smart Citations

Occurrence of K-feldspar-bearing hydrothermal breccias in the Bouillante geothermal field (Basse Terre – Guadeloupe)

Patrier

Bruzac

Pays

et al. 2013

Bulletin De La Société Géologique De France

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“…However, this original permeability has been completely obliterated. Exhaustive analysis of clay minerals from wells BO-5 (Figure 7), BO-6 and BO-7 (Mas, Guisseau et al 2006;Guisseau, Patrier Mas et al 2007) and from surface samples (Patrier, Beaufort et al 2003) shows that this obliteration can be explained by self sealing processes related to the alteration by circulation of hydrothermal fluids (smectite type clays down to about 250 m depth, partially replaced by kaolinite from 150 m down and, lower down, interbedded illite smectite). As the geological formations that had significant original permeability are at shallow depth within this particularly clogged zone, the geothermal system no longer comprises formations with a significant matrix or fissure permeability.…”

Section: Roles Of Fractures In the Hydrodynamic Properties Of The Geomentioning

confidence: 99%

Hydrogeological model of a high-energy geothermal field (Bouillante area, Guadeloupe, French West Indies)

Lachassagne¹,

Maréchal²,

Sanjuan

2009

Hydrogeol J

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The Bouillante geothermal field presently provides about 8% of the annual electricity needs of the French West Indies island of Guadeloupe. It has been the subject of a large number of studies covering various disciplines. These results enable the proposal of a hydrogeological conceptual model of the field. The reservoir consists of two perpendicular sets of fractures and faults, related to major regional tectonic structures. The capacitive and transmissive functions of the field are assured by these deep faults and fractures, which have been clogged near surface by self sealing and clay fill phenomena. The heat exchanges of the reservoir with the outside are thus reduced, through thermal and moreover hydraulic blanketing, to conductive transfers. Convection cells are active within the reservoir, ensuring its thermal and geochemical homogeneity. Heat exchange with the magmatic chamber is only conductive. The Na-Cl geothermal fluid in the reservoir is composed of about 60% sea water and 40% fresh water of meteoric origin and has reached a chemical equilibrium with a mineralogical assemblage at 250-260°C. This equilibrium state, the absence of tritium in solution, the low ratio between water in and out fluxes and the large reservoir volume (estimated at more than 30 millions m 3 using tracer tests) suggest a relatively long (>> 100 years) residence time of the geothermal fluid in the reservoir. Three main factors, all essential, explain the existence and location of the Bouillante geothermal field: a heat source (cooling hypovolcanic intrusion), a network of permeable fractures at the origin of the geothermal aquifer, and an impermeable surface cover, limiting the loss of energy and ensuring the durability of the field.

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The mineralogy, geochemistry, and suitability for ceramic applications of Akharım (Afyonkarahisar, W Turkey) kaolinitic clay

Kuşcu

Yildiz

2016

Arab J Geosci

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Surficial clay assemblage associated with the hydrothermal activity of Bouillante (Guadeloupe, French West Indies)

Cited by 15 publications

References 24 publications

Occurrence of K-feldspar-bearing hydrothermal breccias in the Bouillante geothermal field (Basse Terre – Guadeloupe)

Occurrence of K-feldspar-bearing hydrothermal breccias in the Bouillante geothermal field (Basse Terre – Guadeloupe)

Hydrogeological model of a high-energy geothermal field (Bouillante area, Guadeloupe, French West Indies)

The mineralogy, geochemistry, and suitability for ceramic applications of Akharım (Afyonkarahisar, W Turkey) kaolinitic clay

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