By Patrick Bachelery, Jean-François Lenat, Andrea Di Muro, Laurent Michon
Piton de los angeles Fournaise and Karthala are either safeguard volcanoes within the southwest Indian Ocean. This book summarizes the paintings performed on those very energetic basaltic volcanoes. Piton de l. a. Fournaise has an extended heritage of clinical examine and tracking, with many facts amassed in the course of contemporary eruptions. it truly is one among the main studied volcanoes on the earth. The paintings provided during this monograph comprises geological, geophysical, geochemical and petrological features, but in addition stories on actual geography, usual risks and the sociological and behavioural approaches.'
The Karthala volcano can be much less popular, however it serves as an attractive comparability to Piton de los angeles Fournaise. even though located just about the volcanoes of Hawaii, it differs from them through its extra alkaline magmas and no more widespread task. It was once additionally monitored for greater than 25 years, generating notable eruptions in fresh years.
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Additional info for Active Volcanoes of the Southwest Indian Ocean: Piton de la Fournaise and Karthala
Two volcano ediﬁces currently compose the island: Piton des Neiges to the NW and Piton de la Fournaise to the SE. The main internal feature of the Piton des Neiges volcano is a huge intrusive complex with a lateral extent coinciding at the surface with that of three depressions called Cirques. At the eastern side of the island, a similar, though smaller, complex is associated with Les Alizés volcano, an old ediﬁce no longer visible in the landscape. The existence of the latter is inferred by gravity, drill hole and dating data.
2009). The *50°N and *90°N elongation of the ridges is signiﬁcantly different from that of the transform faults (*35–40°N). They clearly intersect the magnetic fabric of the oceanic crust and must therefore be regarded as being younger than the oceanic crust. g. in the South Paciﬁc between the Louisville chain and the ridge (Small 1995), or the Musicians Seamounts (Kopp et al. 2003)). Most authors now agree that the ridges represent plume channels between a hot spot and an oceanic rift. Thus Bissessur (2011) proposes that these ridges would result from interaction between the nascent 2 Geodynamic Setting of La Réunion La Réunion hot spot, around 65 Ma, and the Mascarene Basin rifting, until the latter vanished when the rifting jumped north to the Carlsberg ridge.
2009a). Recently, Le Friant et al. (2011) proposed that debris avalanches were more developed offshore of Piton de la Fournaise than offshore of Piton de Neiges, where the flanks are more likely to have resulted from a general spreading of the ediﬁce. The submarine bulges are dissected and bound by canyons up to 200 m deep, ﬁlled with coarse sediments, and generally connected to onshore streams (Babonneau et al. 2013; Saint-Ange et al. 2011; Sisavath et al. 2011). In the abyssal plain, these canyons evolve into huge volcanoclastic deep-sea fans, clearly visible on the acoustic image on Fig.
Active Volcanoes of the Southwest Indian Ocean: Piton de la Fournaise and Karthala by Patrick Bachelery, Jean-François Lenat, Andrea Di Muro, Laurent Michon