Bulletin of Volcanology

, Volume 49, Issue 6, pp 713–722

Detailed gravity study of the offshore structure of Piton de la Fournaise volcano, Reunion Island

  • Dominique Rousset
  • Alain Bonneville
  • Jean-François Lenat
Article

Abstract

We present an interpretation of gravity data acquired in 1984 by the French R/V Jean Charcot on the submarine part of the eastern flank of Piton de la Fournaise volcano. We comment on the Bouguer anomaly map and give a quantitative interpretation of three gravity profiles. The main results are that a gravity high over Grand Brûlé, the lower subaerial part of the eastern flank, does not extend far offshore and that an anomalous topographic feature, discovered in 1982 on the submarine eastern flank, is characterized by a large negative anomaly. We propose three hypotheses to explain the origin of this anomaly, i. e., it marks the site of a new volcano, or it is a consequence of lateral volcanism from a volcano older than Piton de la Fournaise, or more probably, it represents a great landslide deposit.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Averous P (1983) Esquisse géomorphologique des atterrages de l'ile de la Réunion. Terres Australes et Antarctiques Françaises, 1 mapGoogle Scholar
  2. Bachelery P (1981) Le Piton de la Fournaise (ile de la Réunion). Etude volcanologique, structurale et pétrologique. Thesis; University of Clermont-Ferrand, 259 pGoogle Scholar
  3. Beuzart P, Lenat JF, Schlich R (1984) Bathymétrie de l'extension sous marine du massif de la Fournaise, Ile de la Réunion. Centre National pour l'Exploitation des Océans, 1 mapGoogle Scholar
  4. Broyles ML, Suyenaga W, Furumoto AS (1979) Structure of the lower East Rift Zone of Kilauea volcano, Hawaii, from seismic and gravity data. J Volcanol Geotherm Res 5:317–336Google Scholar
  5. Chevallier L, Bachelery P (1981) Evolution structurale du volcan actif du Piton de la Fournaise, Ile de la Réunion, Océan Indien Occidental. Bull Volcanol 44:723–741Google Scholar
  6. Chevallier L, Vatin-Perignon N (1982) Volcano structural evolution of Piton des Neiges, Réunion Island, Indian Ocean. Bull Volcanol 45:285–298Google Scholar
  7. Dehlinger P (1978) Marine gravity. Elsevier Oceanography Series 322 pGoogle Scholar
  8. Duffield WA, Stieltjes L, Varet J (1982) Huge landslides blocks in the growth of Piton de la Fournaise, la Réunion and Kilauea volcano Hawaii. J Volanol Geotherm Res 12:147–160Google Scholar
  9. Gerard A, Lesquer A, Lachaud JC, Louis P, Mennechet C (1980) Etude gravimétrique de la moitié Sud Est de l'ile de la Réunion. CR Acad Seie Paris, 290, B:139–142Google Scholar
  10. Kinoshita WT (1965) A gravity survey of the island of Hawaii. Pac Sci 19:339–340Google Scholar
  11. Lecointre J, Vincent PM (1984) Séquence de pyroclastites différenciées sur le massif du Piton des Neiges. Ile de la Réunion. Caractéristiques et signification volcano structurale. Abstr in Colloque Pirpsev, Clermont FerrandGoogle Scholar
  12. Lenat J-F (1987) Structure et dynamique internes d'un volcan basaltique intraplaque océanique: le Piton de la Fournaise (ile de la Réunion). Thesis; University of Clermont-Ferrand, 286 pGoogle Scholar
  13. McDougall I (1971) The geochronology of the young volcanic island of Réunion, Indian Ocean. Geochim Cosmochim Acta 36:261–288Google Scholar
  14. McFarlane DS, Ridley WI (1968) An interpretation of gravity data for Tenerife, Canary Islands. Earth Planet Sci Lett 4:481–486Google Scholar
  15. McFarlane DS, Ridley WI (1969) An interpretation of gravity data for Lanzarote, Canary Islands. Earth Planet Sci Lett 6:431–436Google Scholar
  16. Philippot F (1984) La sédimentation volcanogène récente autour de l'ile de la Réunion. Thesis, University of Paris Sud-OrsayGoogle Scholar
  17. Rancon JP, Lerebour P, Auge T (1987) Mise en évidence par forage d'une chambre magmatique ancienne à l'aplomb de la zone orientale du Piton de la Fournaise (ile de la Réunion), implications volcanologiques. CR Acad Sci Paris, 304, II, 55–60Google Scholar
  18. Rymer H, Brown GC (1986) Gravity field and the interpretation of volcanic structures: Geological discrimination and temporal evolution. J. Volcanol Geotherm Res 27:229–254Google Scholar

Copyright information

© Springer-Verlag 1987

Authors and Affiliations

  • Dominique Rousset
    • 1
  • Alain Bonneville
    • 2
  • Jean-François Lenat
    • 2
  1. 1.Centre Géologique et GéophysiqueUSTLMontpellier CedexFrance
  2. 2.U. A. CNRS NO 10Centre de Recherches volcanologiques 5Clermont-Ferrand CedexFrance

Personalised recommendations