Title :

Characterization of an exhumed high-temperature hydrothermal system and its application for deep geothermal exploration: An example from Terre-de-Haut Island (Guadeloupe archipelago, Lesser Antilles volcanic arc)

Author(s) :

Favier, A. [Auteur]
Université des Antilles [UA]
Géoazur [GEOAZUR 7329]
Lardeaux, J.-M. [Auteur]
Géoazur [GEOAZUR 7329]
Corsini, M. [Auteur]
Géoazur [GEOAZUR 7329]
Verati, C. [Auteur]
Géoazur [GEOAZUR 7329]
Navelot, V. [Auteur]
GeoRessources
Géraud, Yves [Auteur]
GeoRessources
Diraison, M. [Auteur]
GeoRessources
Ventalon, S. [Auteur]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Voitus, E. [Auteur]
Université des Antilles (Pôle Guadeloupe)

Journal title :

Journal of Volcanology and Geothermal Research

Pages :

107256

Publisher :

Elsevier

Publication date :

2021-10

ISSN :

0377-0273

English keyword(s) :

Exhumed hydrothermal system
Hydrothermal fluids pathways
High temperature geothermal reservoir
Geothermal exploration
Lesser Antilles arc

HAL domain(s) :

Planète et Univers [physics]

English abstract : [en]

We present integrated structural, petrological, mineralogical and geochemical investigations conducted on an ex-humed hydrothermal system identified in Terre-de-Haut Island (Guadeloupe archipelago). This work demon-strates, ...
Show more >We present integrated structural, petrological, mineralogical and geochemical investigations conducted on an ex-humed hydrothermal system identified in Terre-de-Haut Island (Guadeloupe archipelago). This work demon-strates, for the first time, the occurrence of ductile shear zones, marked by the development of spacedschistosity planes generated by pressure-solution processes. We unravel first that the development of spacedschistosity is coeval with high-temperature hydrothermalism (approximately 350 °C) and second that this hy-drothermal alteration occurred at a depth of less than 2 km. We highlight, at shallow crustal depths, the recordof both vertical and lateral fluid pathways in the studied volcanic arc. Finally, combining this new dataset withthe large number of published surface data obtained in the active geothermal system of Bouillante, we proposea conceptual scheme for the studied fossil reservoir to document the roots of magmatic arc-related active geo-thermal systems and to introduce new perspectives for deep geothermal exploration.Show less >

Language :

Anglais

Popular science :

Non

Collections :

• Laboratoire d'Océanologie et de Géosciences (LOG) - UMR 8187

Source :

Harvested from HAL