Spatio-temporal evolution of temperature and fluid flow through a new 'thermo-lithological' boundary; the case of a pit crater of Karthala volcano (Comoros archipelago) refilled on January 13th 2007 by a lava flow
| Autor: | Noé Bernabeu, Eric Delcher, Claude Smutek, Anthony Finizola, Pierre Saramito |
|---|---|
| Přispěvatelé: | Equations aux Dérivées Partielles (EDP ), Laboratoire Jean Kuntzmann (LJK ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Laboratoire GéoSciences Réunion (LGSR), Université de La Réunion (UR)-Institut de Physique du Globe de Paris, ANR-16-CE39-0009,LAVA,Lava et la Ville: l'évaluation des risques, de réduction des risques et de gestion des crises de effusive Désastres(2016), Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris), Institut de Physique du Globe de Paris (IPGP (UMR_7154)), Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) |
| Rok vydání: | 2018 |
| Předmět: |
geography
geography.geographical_feature_category 010504 meteorology & atmospheric sciences [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] Lava 010502 geochemistry & geophysics 01 natural sciences Pit crater Temperature gradient Geophysics Effusive eruption Impact crater Volcano 13. Climate action Geochemistry and Petrology [SDU.STU.VO]Sciences of the Universe [physics]/Earth Sciences/Volcanology Fluid dynamics [MATH.MATH-AP]Mathematics [math]/Analysis of PDEs [math.AP] Electrical resistivity tomography Geomorphology Geology 0105 earth and related environmental sciences |
| Zdroj: | Journal of Volcanology and Geothermal Research Journal of Volcanology and Geothermal Research, Elsevier, 2018, 367, pp.7-19. ⟨10.1016/j.jvolgeores.2018.10.013⟩ Journal of Volcanology and Geothermal Research, 2018, 367, pp.7-19. ⟨10.1016/j.jvolgeores.2018.10.013⟩ |
| ISSN: | 0377-0273 |
| Popis: | International audience; On January 13 th 2007 the effusive eruption of Karthala volcano, in the Comoros islands, emitted a lava flow which has been perfectly constrained inside the cylindrical shape of the Choungou Chagnoumeni pit crater; 225m in diameter and with a thickness of about 7m. The good knowledge of the geometry of this lava flow allowed modeling its cooling, with the Rheolef code, with a good accuracy. The results of the thermal modeling were compared with other measurements performed on the field: (1) a high resolution electrical resistivity tomography profile crossing the boundary of the crater and (2) the thermal monitoring of temperature with eleven sensors, spaced 1 meter apart, at 30 cm depth, perpendicularly to the boundary of the crater. Thanks to this multidisciplinary approach it has been possible to display that, in the first order, the resistivity distribution in the soil 2 years and 5 months after the eruption is directly influenced by the residual temperature and not by the structural boundary. During the first three years of cooling, an inversion in the shallow lateral temperature gradient was observed in temperature data set collected at 30 cm depth. |
| Databáze: | OpenAIRE |
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