Chemical evolution of thermal waters and changes in the hydrothermal system of Papandayan volcano (West Java,Indonesia) after the November 2002 eruption |
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| Authors: | Agnè s Mazot,Alain Bernard,Tobias Fischer,Salvatore Inguaggiato,Igan S. Sutawidjaja |
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| Affiliation: | 1. Department of Earth and Environmental Sciences, CP 160/02, Université Libre de Bruxelles, 50 Ave. Roosevelt, 1050 Brussels, Belgium;2. Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM 87131-0001, USA;3. Istituto Nazionale di Geofisica e Vulcanologia Sezione di Palermo Via Ugo la Malfa, 153, 90146 Palermo, Italy;4. Directorate of Volcanology and Geological Hazard Mitigation, Jalan Diponegoro 57, Bandung 40122, Indonesia |
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| Abstract: | Papandayan is a stratovolcano situated in West Java, Indonesia. Since the last magmatic eruption in 1772, only few hydrothermal explosions have occurred. An explosive eruption occurred in November 2002 and ejected ash and altered rocks. The altered rocks show that an advanced argillic alteration took place in the hydrothermal system by interaction between acid fluids and rocks. Four zones of alteration have been defined and are limited in extension and shape along faults or across permeable structures at different levels beneath the active crater of the volcano. |
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| Keywords: | Papandayan volcano Indonesia phreatic eruption hydrothermal system fluid geochemistry advanced argillic alteration gas geochemistry |
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