Complete Gravity Study Of Piton De La Fournaise Volcano, Reunion Island

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Journal Article: Complete Gravity Study Of Piton De La Fournaise Volcano, Reunion Island

Abstract
We present an interpretation of all available gravity data on Piton de la Fournaise volcano, including a new set collected in the summit area. Using a linear programming inversion method, we determine the extension of the Grand Brule ultramafic body, drilled in 1985, and we propose to interpret it as a frozen magma chamber related to a disappeared volcano. We also present evidence for superficial mass excess under the Enclos Fouque and Plaine des Sables calderas that we link to the present Piton de la Fournaise volcanism. The detailed gravity survey of the summit area allows us to emphasize the great importance of dyke complexes associated with the NE and SE rift zones and with the shallow magma chamber. A negative anomaly in the summit area is interpreted as a relative minimum between the positive anomaly of Grand Brule and those of the western part of the Enclos Fouque and Plaine des Sables calderas.

Authors 
Dominique Rousset, Alain Lesquer, Alain Bonneville and Jean Francois Lenat








Published Journal 
Journal of Volcanology and Geothermal Research, 1989





DOI 
Not Provided
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Citation

Dominique Rousset,Alain Lesquer,Alain Bonneville,Jean Francois Lenat. 1989. Complete Gravity Study Of Piton De La Fournaise Volcano, Reunion Island. Journal of Volcanology and Geothermal Research. (!) .