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Université d'Orléans |  |
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Université d'Orléans | |
| HAL: insu-00707166, version 1 |
| DOI: 10.1007/978-94-007-2162-3_23 |
| Detailed view |  Export this paper |
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| 5th International Symposium on Submarine Mass Movements and Their Consequences, Kyoto : Japon (2011) |
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| New Evidence of Holocene Mass Wasting Events in Recent Volcanic Lakes from the French Massif Central (Lakes Pavin, Montcineyre and Chauvet) and Implications for Natural Hazards |
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| Emmanuel Chapron 1Grégoire Ledoux 2 |
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| (2012) |
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| High-resolution seismic profiling (12 kHz) surveys combined with sediment cores, radiocarbon dating, tephrochronology and multibeam bathymetry (when available) allow documentation of a range of Holocene mass wasting events in nearby contrasting lakes of volcanic origin in the French Massif Central (45°N, 2°E): two deep maar lakes (Pavin and Chauvet) and a shallow lake (Montcineyre) dammed by the growth of a volcano. In these lacustrine environments dominated by authigenic sedimentation, recent slide scars, acoustically transparent to chaotic lens-shaped bodies, slump deposits or reworked regional tephra layers suggest that subaqueous mass wasting processes may have been favoured by gas content in the sediments and lake level changes. While these events may have had a limited impact in both lakes Chauvet and Montcineyre, they apparently favoured the development of lacustrine meromicticity in maar Lake Pavin along with possible subaerial debris flows resulting from crater outburst events. |
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| 1: | Institut des Sciences de la Terre d'Orléans (ISTO) |
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Université d'Orléans – CNRS : UMR7327 – INSU – Bureau de Recherches Géologiques et Minières (BRGM) |
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| 2: | Centre d'études nordiques et Département de Géographie |
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Université de Laval |
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| 3: | Canada Research Chair in Marine Geology (ISMER) |
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Canada Research Chair in Marine Geology |
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| 4: | Laboratoire Magmas et Volcans (LMV) |
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CNRS : UMR6524 – Institut de recherche pour le développement [IRD] – INSU – Université Blaise Pascal - Clermont-Ferrand II – Université Jean Monnet - Saint-Etienne |
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| subject | : | Sciences of the Universe/Continental interfaces, environment Environmental Sciences/Global Changes |
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| insu-00707166, version 1 | |
| http://hal-insu.archives-ouvertes.fr/insu-00707166 | |
| oai:hal-insu.archives-ouvertes.fr:insu-00707166 | |
| From: Nathalie Pothier | |
| Submitted on: Tuesday, 12 June 2012 10:10:32 | |
| Updated on: Tuesday, 30 April 2013 15:12:09 | |
