Active Volcanoes of the Southwest Indian Ocean: Piton De La Fournaise and Karthala.pdf

Active Volcanoes of the Southwest Indian Ocean: Piton De La Fournaise and Karthala.pdf


Piton de la Fournaise and Karthala are both shield volcanoes in the southwest Indian Ocean. This publication summarizes the work done on these very active basaltic volcanoes. Piton de la Fournaise has a long history of scientific research and monitoring, with many data collected during recent eruptions. It is certainly one of the most studied volcanoes in the world. The work presented in this monograph includes geological, geophysical, geochemical and petrological aspects, but also studies on physical geography, natural hazards and the sociological and behavioural approaches. If the Karthala volcano is much less known, it offers an interesting complementarity with Piton de la Fournaise. Structurally close to the volcanoes of Hawaii, it differs by its more alkaline magmas and less frequent activity. Also monitored for more than 25 years, it has experienced extraordinary eruptions in recent years.

A brief history of the observation of Piton de la Fournaise central area.- Geodynamic setting of La Reunion Island.- The construction of La Reunion Island.- Geology and morphostructure of Piton de la Fournaise.- Erosion and volcaniclastic sedimentation at Piton de La Fournaise: from source to deep marine environment.- Magma paths at Piton de la Fournaise volcano.- Pre-historic explosive activity at Piton de la Fournaise volcano.- Fifteen years of intense eruptive activity (1998-2013) at Piton de La Fournaise volcano (La Reunion): A review.- Petrological and experimental constraints.- A review of the recent geochemical evolution of Piton de la Fournaise volcano, Reunion Island (1927-2010).- Magma degassing at Piton de la Fournaise volcano.- Static and dynamic seismic imaging of Piton de la Fournaise.- Seismic monitoring at Piton de la Fournaise.- Ground deformation at Piton de la Fournaise (La Reunion Island), a review from 20 years of GNSS monitoring.- The March-April 2007 eruptions of Piton de la Fournaise as recorded by interferometric data.- Contribution of tiltmeters and extensometers to monitor Piton de la Fournaise activity.- A Geographical Information System for mapping eruption risk at Piton de la Fournaise, Reunion Island.- Perception of risk for volcanic hazard in Indian Ocean: La Reunion Island case study.- Groundwater resources: Conceptual models.- The volcanism of the Comores archipelago integrated at a regional scale.- Structure and history of Karthala.- Geochemical and Petrological aspects of Karthala.- Groundwater prospection in Grande Comore Island - Joint contribution of geophysical methods, hydrogeological times-series analysis and groundwater modelling.- Volcanic risk and crisis management on Grande Comore island.


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