La recherche en volcanologie a poor objectifs la connaissance de la structure interne des edifices volcaniques et la comprehension des processus dynamiques qui les affectent. Ces travaux contribuent naturellement a la surveillance des volcans qui a pour but a prevision des eruptions et des evolutions des systemes volcaniques.
Die vorliegende Dissertation entstand am Institut fur Mineralogie, Petralogie und Geochemie (IMPG) der Universitat Freiburg im Rahmen eines durch die Deutsche Forschungsgemein-schaft unterstutzten Gemeinschaftsvorhabens zur Desaster-Forschung am Hochirisko-Vulkan Merapi (Indonesien), an dem verschiedene geowissenschaftliche Institutionen in Deutschland und Indonesien unter der Leitung des GeoFo…
Mount Merapi, island are volcano located in the center of Java (Indonesia), lies upon the remnents of a volcano older than 400.000 years called Pre-Merapi. Sensu stricto Merapi is a very young volcano characterised by a rapid edification. Its history is divided into four periods (ancient, Middle aged, Recent and Historical Merapi).
Merapi volcano is one of the most active volcanoes in the world and during the last 3000 yrs, it has been more or less continuously in eruption. Merapi volcano is a stratovolcano with a south-west facing horseshoe-shaped summit crater filled by a lava dome. Its composition rangers from basalt to basaltic andesite (52 to 56% SiO2) and it has high Al2O3 (18.5 to 20.2% wt) and medium to high K2O …