A5041133950- Geology and Paleoclimatology Research
- earthquake and tectonic studies
- Geological formations and processes
- Methane Hydrates and Related Phenomena
- Geological and Geophysical Studies
- Geological Studies and Exploration
- Geological and Geochemical Analysis
- Geological and Geophysical Studies Worldwide
- Marine and environmental studies
- Landslides and related hazards
- Hydrocarbon exploration and reservoir analysis
- High-pressure geophysics and materials
- Geochemistry and Elemental Analysis
- Seismic Imaging and Inversion Techniques
- Geotourism and Geoheritage Conservation
- Paleontology and Stratigraphy of Fossils
- Marine Biology and Ecology Research
- Geological Modeling and Analysis
- Seismic Waves and Analysis
- Climate change and permafrost
- Geophysics and Gravity Measurements
- Pleistocene-Era Hominins and Archaeology
- Pacific and Southeast Asian Studies
- Geotechnical and Geomechanical Engineering
- Archaeology and ancient environmental studies
Institut de physique du globe de Paris
2011-2024
Centre National de la Recherche Scientifique
2011-2024
Université Paris Cité
2011-2024
Kiel University
2018-2021
A.P. Karpinsky Russian Geological Research Institute
2020
GEOMAR Helmholtz Centre for Ocean Research Kiel
2014-2019
Sorbonne Paris Cité
2011-2018
Université Clermont Auvergne
2011
Laboratoire Magmas et Volcans
2010
New high‐resolution multichannel seismic data (GWADASEIS‐2009 and JC45/46‐2010 cruises; 72 60 channels, respectively) combined with previous (AGUADOMAR‐1999 CARAVAL‐2002; 6 24 allow a detailed investigation of mass‐wasting processes around the volcanic island Montserrat in Lesser Antilles. Seven submarine deposits have sources on flanks Montserrat, while three are related to nearby Kahouanne volcanoes. The most voluminous deposit (∼20 km 3 ) within Bouillante‐Montserrat half‐graben has not...
Abstract IODP Expedition 340 successfully drilled a series of sites offshore Montserrat, Martinique and Dominica in the Lesser Antilles from March to April 2012. These are among few drill gathered around volcanic islands, first scientific drilling large likely tsunamigenic island‐arc landslide deposits. cores provide evidence tests previous hypotheses for composition origin those Sites U1394, U1399, U1400 that penetrated deposits recovered exclusively seafloor sediment, comprising mainly...
Lake Ladoga in northwestern Russia is Europe's largest lake. The postglacial history of the basin for first time documented continuously with high temporal resolution upper 13.3 m a sediment core (Co1309) from part We applied multiproxy approach including radiographic imaging, (bio‐)geochemical and granulometric analyses. Age control was established combining radiocarbon dating varve chronology, latter anchored to correlated age lake close by. age‐depth model reveals onset glacial...
Abstract Landslides are common features in the vicinity of volcanic islands. In this contribution, we investigate landslides emplacement and dynamics around island Martinique based on first scientific drilling such deposits. The evolution active Montagne Pelée volcano has been marked by three major flank‐collapses that removed much western flank volcano. Subaerial collapse volumes vary from 2 to 25 km 3 debris avalanches flowed into Grenada Basin. High‐resolution seismic data...
Abstract The northern part of the South China Sea is characterized by widespread occurrence bottom simulating reflectors indicating presence marine gas hydrate. Because area covers both a tectonically inactive passive margin and termination subduction zone, influence tectonism on dynamics hydrate systems can be studied in this region. Geophysical data show that there are multiple thrust faults active while much fewer smaller exist margin. This tectonic difference matches with geophysical...
A multi‐channel, high‐resolution seismic reflection survey using a Micro‐ GI airgun was carried out in the framework of Russian‐German project PLOT (Paleolimnological Transect) on Lake Levinson‐Lessing, Taymyr Peninsula, 2016. In total, ~70 km profiles revealed unprecedented detail glacial and postglacial sedimentary infill lake basin. Five main units have been recognized interpreted as (Unit V), subglacial proglacial IV ), marine III fluvial‐lacustrine II ) lacustrine I) sediments. Of...
Results from recent marine geophysical surveys offer a new perspective for characterizing the evolution processes of volcanic islands. In 2006, cruises FOREVER and ERODER 1 investigated submarine flanks surrounding abyssal plain La Réunion (Indian Ocean) to obtain first time complete survey area. Combined analyses these data reveal major differences in two emerged volcanoes, Piton des Neiges de la Fournaise. We show that debris avalanche deposits extend on only offshore active Fournaise...
Abstract Volcanic archipelagos are a source of numerous on- and offshore geohazards, including explosive eruptions potentially tsunamigenic large-scale flank collapses. Fogo Island in the southern Cape Verdes is one most active volcanoes world, making it both prone to collapse (as evidenced by c. 73 ka Monte Amarelo volcanic collapse), widely distributed tephra material. The distribution debris avalanche deposits surrounding volcaniclastic apron were previously mapped using only...
The “Fani Maoré” eruption off the coasts of Mayotte has been intensively monitored by applying methods similar to those used for subaerial eruptions. Repeated high-resolution bathymetric surveys and dredging, coupled with petrological analyses time-constrained samples, allowed tracking evolution magma over whole submarine eruptive sequence. Indeed, after one year direct ascent (Phase 1), basanitic switched a different pathway that sampled tephri-phonolitic subcrustal reservoir 2). Later,...
Unlike subaerial volcanic activity, deep submarine eruptions are difficult to detect, observe and monitor. The objective of this paper is describe a large complex region, named the Horseshoe area, recently discovered at ∼1500 m below sea level on eastern upper slope Mayotte Island. area crucial because, since 2018, it has experienced an exceptionally seismic activity associated with ongoing eruption that formed new edifice, Fani Maoré, about 40 km east. We present results multiscale study,...
ABSTRACT The 45.95 m‐long sediment succession shown in core Co1401 from Lake Levinson‐Lessing allows the reconstruction of largely unexplored environmental and climatic history Taymyr Peninsula past 62 kyr. was analysed with a multidisciplinary approach including lithological, granulometric, geochemical pollen analyses. proxy data indicate relatively stable, herb‐dominated environment only subtle changes between cold/wet late Marine Isotope Stage (MIS) 4 early MIS 3, mild/dry middle 3...
Analogue models are commonly used to gain insights into large-scale volcano-tectonic processes. Documenting model surface topography and the three-dimensional (3D) aspect of deformation structures remains greatest challenge in understanding simulated Here we present results volcano analogue imaged with an X-ray computerized micro-tomography (μCT) system developed at Ghent University Centre for Tomography (UGCT). Experiments simulate due gravitational loading over a ductile layer, process...
Formosa Ridge is one of many topographic ridges created by canyon incision into the eastern South China Sea margin. The northwestern termination ridge caused beheading due to a westward shift that originally formed flank Ridge. Below bottom simulating reflector (BSR) exists. Its depth below sea floor coincides with theoretical base gas hydrate stability zone and reflection has reverse polarity suggesting it free accumulations. BSR ubiquitous but shows significant variations in ranging from...
Abstract High‐resolution seismic reflection profiles gathered in 2006 on La Réunion submarine flanks and surrounding abyssal plain, enabled characterization of the seismostratigraphy architecture volcaniclastic apron. Four units are defined beyond edifice base: (1) a basal unit, interpreted as pelagic sediment predating volcanism; (2) second unit showing low‐ to medium‐amplitude reflections, related emergence including explosive phase; (3) high‐amplitude associated with subaerial volcanic...