Timing and implications of mass-wasting processes in the history of Martinique volcanoes: First insights from expedition IODP 340
Presented by Ms. Morgane BRUNET on 23 Sep 2013 from 17:15 to 19:15
Type: Poster presentation
Session: Poster session
Track: Poster presentations
Volcanic flank-collapses usually produce voluminous debris avalanches, potentially destructive on land and tsunamigenic as well when they enter the sea. The expedition IODP 340 from 3rd March to 17th April 2012, offshore the Lesser Antilles arc volcanoes, yielded a unique record of the eruptive activity of the most active complexes over the last million years. The first observations of drilled cores revealed that large deposits offshore Martinique previously interpreted as debris avalanche deposits were largely composed of deformed sediments. We are trying to get a complete eruptive history of the northern part of Martinique volcanoes and to better constrain slide processes in time, so that we could highlight the importance of construction versus destruction processes in the volcano evolution. Analyses of deformation structures within drilled cores, re-interpretation of bathymetric and seismic reflexion data and tephrochronologic studies allow to better constrain ages of deposits and replace them into the long-term history of the volcano.
Location: GEOMAR East shore
Address: Wischhofstr. 1-3 / D-24148 Kiel