A5053075814- earthquake and tectonic studies
- Geological and Geochemical Analysis
- Hydrocarbon exploration and reservoir analysis
- Seismic Imaging and Inversion Techniques
- High-pressure geophysics and materials
- Methane Hydrates and Related Phenomena
- Geological Studies and Exploration
- Geology and Paleoclimatology Research
- Geological and Geophysical Studies
- Reservoir Engineering and Simulation Methods
- Geochemistry and Geologic Mapping
- Geological formations and processes
- Seismic Waves and Analysis
- Oceanographic and Atmospheric Processes
- Marine and environmental studies
- Underwater Vehicles and Communication Systems
- Geological and Tectonic Studies in Latin America
- Geological and Geophysical Studies Worldwide
- Maritime and Coastal Archaeology
- Geological Modeling and Analysis
- Geomagnetism and Paleomagnetism Studies
- Robotics and Sensor-Based Localization
- Underwater Acoustics Research
- COVID-19 and healthcare impacts
- Geophysics and Gravity Measurements
Laboratoire de Géologie de l’École Normale Supérieure
2020-2024
École Normale Supérieure - PSL
2020-2024
Université Paris Sciences et Lettres
2020-2024
Centre National de la Recherche Scientifique
2015-2024
Laboratoire de Physique de l'ENS
2020-2024
École Normale Supérieure
2022-2023
École Normale Supérieure d'Abidjan
2023
Université Paris Cité
2011-2022
Institut de physique du globe de Paris
2013-2022
Charles River Laboratories (Netherlands)
2018-2022
Research Article| July 01, 2006 Modes of seafloor generation at a melt-poor ultraslow-spreading ridge Mathilde Cannat; Cannat 1Equipe de Géosciences Marines, CNRS-UMR 7154, Institut Physique du Globe, 4 place Jussieu, 75252 Paris cedex 05, France Search for other works by this author on: GSW Google Scholar Daniel Sauter; Sauter 2Institut 5 rue Descartes, 67084 Strasbourg cedex, Véronique Mendel; Mendel Etienne Ruellan; Ruellan 3Géosciences Azur, 6526, 250 A. Einstein, Sophia Antipolis, 06560...
Research Article| November 01, 2001 Strength of slightly serpentinized peridotites: Implications for the tectonics oceanic lithosphere J. Escartín; Escartín 1Laboratoire de Géosciences Marines (CNRS FRE2316), case 89, Institut Physique du Globe Paris, 4 Place Jussieu, 75252 France Search other works by this author on: GSW Google Scholar G. Hirth; Hirth 2Department Geology and Geophysics, Woods Hole Oceanographic Institution, Hole, Massachusetts 02543, USA B. Evans 3Department Earth,...
Deformed rocks sampled from a corrugated detachment fault surface near the Mid‐Atlantic Ridge (15°45′N) constrain conditions of deformation and strain localization. Samples recovered in situ record restricted to cold (shallow) lithosphere (greenschist facies), with no evidence for significant high‐temperature either at zone or footwall it. High‐temperature (∼720–750°C) is observed only two sites, cannot be directly linked detachment. Detachment faulting was coeval dyke intrusions that cross...
Deformation and hydration processes are intimately linked in the oceanic lithosphere, but feedbacks between them still poorly understood, especially ultramafic rocks where serpentinization results a decrease of rock density that implies volume increase and/or mass transfer. Serpentinization is accompanied by abundant veining marked different generations vein‐filling serpentines with high variety morphologies textures correspond to mechanisms conditions formation. We use these veins constrain...
It is generally assumed that the seawater-derived fluids feed black smoker vent fields on seafloor are discharged vertically from depths of 1–3 km. We present new oxygen and strontium isotope data show at temperatures 300–400 °C were focused along a low-angle detachment fault 15°45'N near Mid-Atlantic Ridge. Isotopic alteration most extreme ever reported oceanic rocks altered similar temperatures, indicating intensely fluid flow both in recharge discharge parts hydrothermal system. Rare...
We conducted deformation experiments to investigate the strength, processes, and nature of brittle‐ductile transition lizardite antigorite serpentinites. A from localized distributed occurs as confining pressure increases ∼200 ∼400 MPa at room temperature. Deformation in both brittle (localized) ductile (distributed) regimes is accommodated by shear microcracks, which form preferentially parallel (001) cleavage. Axial microcracks (mode I) are infrequently observed. Volumetric strain...
The region of the Mid‐Atlantic Ridge (MAR) between Fifteen‐Twenty and Marathon fracture zones displays topographic characteristics prevalent vigorous tectonic extension. Normal faults show large amounts rotation, dome‐shaped corrugated detachment surfaces (core complexes) intersect seafloor at edge inner valley floor, extinct core complexes cover off‐axis. We have identified 45 potential in this whose locations are scattered everywhere along two segments (13° 15°N segments). Steep...
Research Article| October 01, 2002 Direct geological evidence for oceanic detachment faulting: The Mid-Atlantic Ridge, 15°45′N C.J. MacLeod; MacLeod 1Department of Earth Sciences, Cardiff University, CF10 3YE, UK Search other works by this author on: GSW Google Scholar J. Escartín; Escartín 2Laboratoire de Geosciences Marines (CNRS UMR 7097), Institut Physique du Globe, 75252 Paris, France D. Banerji; Banerji 3Department Geosciences, University Houston, Texas 77204, USA G.J. Banks; Banks...
[1] Expeditions 304 and 305 of the Integrated Ocean Drilling Program cored logged a 1.4 km section domal core Atlantis Massif. Postdrilling research results summarized here constrain structure lithology Central Dome this oceanic complex. The dominantly gabbroic sequence recovered contrasts with predrilling predictions; application ground truth in subsequent geophysical processing has produced self-consistent models for Dome. presence many thin interfingered petrologic units indicates that...
Abstract Microbathymetry data, in situ observations, and sampling along the 13°20′N oceanic core complexes (OCCs) reveal mechanisms of detachment fault denudation at seafloor, links between tectonic extension mass wasting, expose nature corrugations, ubiquitous OCCs. In initial stages faulting high‐angle fault, scarps show extensive wasting that reduces their slope. Flexural rotation further lowers scarp slope, hinders resulting morphologically complex chaotic terrain breakaway denuded...
Understanding abyssal hill spacing The most prominent topographic features on Earth are hills found the bottom of ocean floor. Olive et al. wanted to understand and size these hills. They used a model that combines magma supply mechanical response crust. explains observations around mid-ocean ridges. Crustal topography appears be poor recorder changes in supply. However, may faithfully recorded at base Science , this issue p. 310
AGU Chapman Conference on Oceanic Detachments; Agros, Cyprus, 8–15 May 2010 ; detachments are large‐offset normal faults along the flanks of mid‐ocean ridges. They represent a mode accretion oceanic lithosphere that is fundamentally different from classical “magmatic” models, resulting in lithospheric composition and structure strikingly Penrose model established 40 years ago layered magmatic crust. detachments, which exhume deep lithosphere, forming core complexes (OCCs), scientifically...
Rainbow is a dome-shaped massif at the 36°14′N nontransform offset along Mid-Atlantic Ridge. It hosts three ultramafic-hosted hydrothermal sites: active and high temperature; Clamstone Ghost City are fossil low temperature. The MoMARDREAM cruises (2007, 2008) presented here provided extensive rock sampling throughout that constrains geological setting of activity. lithology heterogeneous with abundant serpentinites surrounding gabbros, troctolites, chromitites, plagiogranites, basalts. We...
Here we demonstrate with a study of the Lucky Strike hydrothermal field that image mosaicing over large seafloor areas is feasible new processing techniques, and repeated surveys allow temporal studies active processes. mosaics, generated from >56,000 images acquired in 1996, 2006, 2008 2009, reveal distribution types diffuse outflow throughout field, their association high‐temperature vents. In detail, zones are largely controlled by faults, suggest spatial clustering likely reflects...