A5042155697- earthquake and tectonic studies
- Geology and Paleoclimatology Research
- Geological and Tectonic Studies in Latin America
- Geological formations and processes
- Geological and Geophysical Studies Worldwide
- Geological and Geochemical Analysis
- Geological and Geophysical Studies
- Methane Hydrates and Related Phenomena
- Paleontology and Stratigraphy of Fossils
- Seismic Imaging and Inversion Techniques
- Seismic Waves and Analysis
- Geochemistry and Geologic Mapping
- Geological Studies and Exploration
- High-pressure geophysics and materials
- Geomagnetism and Paleomagnetism Studies
- Maritime and Coastal Archaeology
- Fire effects on ecosystems
- Archaeological and Historical Studies
- Tropical and Extratropical Cyclones Research
- Geological Modeling and Analysis
- Isotope Analysis in Ecology
- Seismology and Earthquake Studies
- History and Politics in Latin America
- Atmospheric and Environmental Gas Dynamics
- Landslides and related hazards
Observatoire de la Côte d’Azur
2015-2025
Institut de Recherche pour le Développement
2016-2025
Centre National de la Recherche Scientifique
2015-2025
Université Côte d'Azur
2015-2025
Géoazur
2010-2024
Sorbonne Université
2018
Université de Bretagne Occidentale
2012-2015
Institut Universitaire Européen de la Mer
2012-2015
Ifremer
2015
Océanopolis
2012
Abstract U-Pb and Th-Pb dating of monazite from hydrothermal quartz veins (“Alpine veins”) the Lauzière massif (North Belledonne) together with Ar/Ar ages adularias same constrain age last tectono-metamorphic events that affected External Crystalline Massifs (ECM). Ages obtained are surprisingly young. The study structural context combined our chronological data, allow us to propose a tectonic scenario northern ECM for 15-5 Ma period, which was poorly documented so far. two types: (i)...
Abstract The seismic potential of the Lesser Antilles subduction zone is poorly known and highly debated. Only two damaging earthquakes have been reported in historical period, 1839 1843, but their sources magnitude are still uncertain. Global Navigation Satellite Systems coral data contradict each other, no conclusion has reached on coupling ratio plate interface. Given threat posed by possible occurrence a large megathrust earthquake, it crucial to gain information prehistorical events. We...
Abstract. Shaking by moderate to large earthquakes in the Mediterranean Sea has proved past potentially trigger catastrophic sediment collapse and flow. On 21 May 2003, a magnitude 6.8 earthquake located near Boumerdès (central Algerian coast) triggered turbidity currents responsible for 29 submarine cable breaks at foot of continental slope over ~150 km from west east. Seafloor bathymetry backscatter imagery show potential imprints 2003 event previous events. Large scarps resulting active...
Research Article| April 01, 2015 Holocene turbidites record earthquake supercycles at a slow-rate plate boundary Gueorgui Ratzov; Ratzov 1Université de Brest, CNRS UMR 6538, Domaines Océaniques, IUEM, 29280 Plouzané, France2IFREMER, Géosciences Marines–EDROME, France *Current address: Géoazur, Université Nice/Sophia-Antipolis, CNRS, Observatoire la Côte d'Azur, 06560 Valbonne, France. Search for other works by this author on: GSW Google Scholar Antonio Cattaneo; Cattaneo 2IFREMER, Nathalie...
Three giant piston cores, MD18-3548 (20.08 m), MD18-3552 (45.98 and MD18-3547 (35.27 were collected from perched basins in offshore SW Taiwan, with the objective of studying event beds. Detailed grain-size analysis (1 cm resolution), 14C AMS dating, X-CT-scan above-mentioned cores performed, lithofacies carefully delineated. Four distinct identified, namely hemipelagic sediments, homogenites a silty basal layer, turbidites, thin layers. Homogenites documented for first time they considerably...
Abstract Deciphering the migration pattern of Esmeraldas submarine Canyon (EC) and its history cut‐and‐fill allows constraining Pliocene‐Pleistocene tectonic evolution Ecuador‐Colombia convergent margin. Swath bathymetry, multichannel seismic reflection, chronological data show that EC is a 143‐km‐long, shelf‐incising, river‐connected canyon started incising slope apron deposits in Manglares fore‐arc basin ~5.3 Ma ago. The inception appears contemporaneous with subduction Carnegie Ridge...
This article reviews what is known about sediment composition and transport within offshore Taiwan Island, a place on Earth where ultrarapid erosion induced by strong tectonic activity, powerful earthquakes, high relief, intense precipitation during the passage of typhoons. Literature information here integrated with new petrographic, heavy-mineral, clay-mineral, elemental-geochemistry, Sr Nd isotope-geochemistry data river sands fluvial, shelf, deep-sea muds to obtain general overview...
Changes in bottom and pore water oxygenation over glacial – interglacial cycles have influenced the ocean's capacity to store particulate organic carbon regardless of its source, either marine primary productivity or continent-to-ocean transfer terrestrial matter. In Philippine Sea, east off Taiwan, despite being currently oligotrophic, enhanced East Asian Winter Monsoon during Last Glacial Maximum Heinrich Stadial 1 might altered nutrient budget surface waters by providing nutrients from...
Research Article| October 12, 2018 A honeycomb seafloor morphology in carbonate sediment of the Carnegie Ridge (offshore Ecuador): Formation and potential geodynamic significance F. Michaud; Michaud * 1Université Côte d'Azur, IRD (Institut de Recherche pour le Développement), Sorbonne Université, (CNRS) Centre National la Scientifique, Observatoire GEOAZUR (laboratoire Géoazur), 06560 Valbonne, France2Sorbonne Faculté des Sciences et Ingénierie, F-75252 Paris, France *E-mail:...
Abstract Taiwan is a young and seismically active mountain belt, where series of strong earthquakes (M>7) have occurred over the past hundred years. Identifying historical around key to better constrain geodynamic this region. Sedimentological geochemical analyses surface sediments from one station offshore east revealed presence coarse-grained layers interpreted as turbidites. The age these been determined by 210 Pb, 137 Cs, 241 Am chronology. Dating three most recent turbidites provides...
Mainland France is part of a plate interior with strong structural heritage, undergoing low rate deformation, where destructive earthquakes can nevertheless occur. In this paper, we emphasize that the knowledge active faults still largely fragmentary, and significant efforts are needed to generate robust data, in particular on numerous faults, lack any study. This aim “Failles ACTives France” (FACT) axis launched framework Transverse Seismicity Action (ATS) Resif-Epos consortium. We present...