Geothermal Model Of The Salazie Cirque (Reunion Island)- Volcanic And Structural Implications

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Journal Article: Geothermal Model Of The Salazie Cirque (Reunion Island)- Volcanic And Structural Implications

Abstract
A programme of geothermal exploration on Reunion Island resulted in the siting of an exploration geothermal borehole in Salazie Cirque. The borehole attained a depth of 2108 m and encountered temperatures of 192 ± 8°C; no aquifer was found. The geological information obtained made it possible to propose a stratigraphy for the deep underlying rocks beneath the Salazie Cirque on the Piton des Neiges and thus to interpret the events that followed the emergence of the island. A large gabbroic mass was intersected and found to comprise several successive intrusions, the principal one of which is continuously zoned from melagabbro to monzonite. Modeling of geophysical data on the drillhole results enabled the distribution of the different geological units to be interpreted. A geothermal model is proposed taking into account the dynamic evolution of the hydrothermal processes that preceded and accompanied emplacement of the gabbro responsible for the geothermal anomaly underlying the three cirques that sculpt the flanks of the Piton des Neiges.

Authors 
Jacques Demange, Pierre Chovelon and Pascal Puvilland








Published Journal 
Journal of Volcanology and Geothermal Research, 1989





DOI 
Not Provided
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Citation

Jacques Demange,Pierre Chovelon,Pascal Puvilland. 1989. Geothermal Model Of The Salazie Cirque (Reunion Island)- Volcanic And Structural Implications. Journal of Volcanology and Geothermal Research. (!) .