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Download Active Volcanoes of the Southwest Indian Ocean: Piton de la by Patrick Bachelery, Jean-François Lenat, Andrea Di Muro, PDF

By Patrick Bachelery, Jean-François Lenat, Andrea Di Muro, Laurent Michon

Piton de los angeles Fournaise and Karthala are either protect volcanoes within the southwest Indian Ocean. This ebook summarizes the paintings performed on those very energetic basaltic volcanoes. Piton de los angeles Fournaise has a protracted background of clinical examine and tracking, with many facts accumulated in the course of fresh eruptions. it truly is one in all the main studied volcanoes on this planet. The paintings awarded during this monograph contains geological, geophysical, geochemical and petrological points, but additionally reviews on actual geography, traditional dangers and the sociological and behavioural approaches.'

The Karthala volcano can be much less renowned, however it serves as an attractive comparability to Piton de los angeles Fournaise. even if positioned as regards to the volcanoes of Hawaii, it differs from them by way of its extra alkaline magmas and not more common job. It used to be additionally monitored for greater than 25 years, generating amazing eruptions in fresh years.

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Additional resources for Active Volcanoes of the Southwest Indian Ocean: Piton de la Fournaise and Karthala

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3 3-D morphology of the constructed volcanic edifice integrating the on-land part and the submarine parts inferred from magnetic interpretation (Gailler and Lénat 2010). The present-day shoreline and the present-day −4000 m contours are shown with black lines. Coordinates in km, WGS84 UTM 40S. From Gailler and Lénat (2010) The morphology of the submarine volcanic constructions of La Réunion has been recreated by Gailler and Lénat (2010) on the basis of the magnetic and gravity analyses and models (Fig.

2010), with an estimated volume of 135 × 106 m3, which is one order of magnitude greater than the average for the “usual” eruptions. Following this huge emission of lava, a major volcano-tectonic event would have happened at the summit, with a large collapse of the summit (Fig. 13). Unlike in 2007 (Michon et al. 2007, 2009; Staudacher et al. 2009), when the summit collapse occurred simultaneously with a huge flank eruption, the collapse following the 1931 large flank eruption seems to have occurred progressively over the following years.

The associated magnetic anomalies indicate that both the Brunhes and Matuyama (and older) formations are present (Gailler and Lénat 2010). 44 Ma determined for dredged samples from the offshore continuation of the north-east rift zone of Piton de la Fournaise (Lénat et al. 2009a; Smietana 2011; Smietana et al. 127 Ma for the Cone Elianne, on the southern submarine flank of Piton de la Fournaise (Lénat et al. 2009a; Smietana 2011; Smietana et al. 2010). 48 Ma was found (Smietana 2011) at the surface of a ridge (“Ride d’Etang Salé”) at the southwest of the island.

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