Beschreibung
La Reunion is an oceanic intra-plate volcanic island located at the southern-most part 0 of the Mascarene Basin at 21 0 07' S, 55 32' E (Figure 1). It lies south of the Mascarene Plateau and Mauritius Island but is a distinct topographic feature on the rather flat ocean bottom of the Mascarene Basin, whose age is paleocene in the vicinity of the island (Schlich, 1982), and whose lowest point is more than 4000m deep. La Reunion is ellip tical in shape (50 X 70 km) with a NW-SE elongation. It is composed of two volcanoes: Piton des Neiges and Piton de la Fournaise. A third volcanic structure has been recent ly discovered on the east submarine flank of the island (Unat et aI., submitted). Piton des Neiges, a dormant and deeply eroded volcano, rises to a height of 3069 m and oc cupies the northwestern two-thirds of the island. Piton de la Fournaise (2630 m), one of the most active basaltic volcanoes in the world, began to grow more than 3. 5 X 1O~ years ago on the southeast flank of Piton des Neiges. The evolution of Piton de la Fournaise (Chevallier and Bachclery, 1981) is marked by the formation of three sub-concentric nested calderas (Figure 2). The boundaries of the two older calderas are more or less buried or eroded.
Inhaltsverzeichnis
InhaltsangabeSeismological Detection and Delineation of Magma Chambers Beneath Intraplate Volcanic Centers in Western U.S.A.- Dynamics of Magma Transfer at Piton de la Fournaise Volcano (Réunion Island, Indian Ocean).- Feeding Mechanism of Eurptive Activity at Mt. Etna Based on Seidmological and Petrological Data.- Ground Deformation Monitoring and Modelling at Some Italian Volcanoes: Vesuvio, Lipari-Vulcano and Campi Flegrei.- Siesmic Sources and swarms at Campi Flegrei, Southern Italy.- Volcanic Activity and Eruption Sequences at Stromboli during 1983-1984.- Thermal Instabilities During Flow of Magma in Conduits with Finite Conductivity.- A Theory on the Transport and Distribution of Radon.- Mathematical Attractor Theory and Plutonic-Volcanic Episodicity.- Book Reviews.
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