A5039871223- Geological and Geochemical Analysis
- earthquake and tectonic studies
- High-pressure geophysics and materials
- Hydrocarbon exploration and reservoir analysis
- Seismic Imaging and Inversion Techniques
- Geological Studies and Exploration
- Methane Hydrates and Related Phenomena
- Geology and Paleoclimatology Research
- Geological and Geophysical Studies
- Geochemistry and Geologic Mapping
- Reservoir Engineering and Simulation Methods
- Seismic Waves and Analysis
- Geological formations and processes
- Geomagnetism and Paleomagnetism Studies
- Oceanographic and Atmospheric Processes
- Underwater Vehicles and Communication Systems
- Underwater Acoustics Research
- Paleontology and Stratigraphy of Fossils
- Atmospheric and Environmental Gas Dynamics
- Geological and Geophysical Studies Worldwide
- Environmental Monitoring and Data Management
- Marine Biology and Ecology Research
- Marine and coastal ecosystems
- Hydraulic Fracturing and Reservoir Analysis
- Metallurgical Processes and Thermodynamics
Centre National de la Recherche Scientifique
2016-2025
Université Paris Cité
2014-2025
Institut de physique du globe de Paris
2016-2025
Laboratoire de Biotechnologie et Chimie Marines
1992-2024
European Multidisciplinary Seafloor and water column Observatory
2020-2022
Sorbonne Paris Cité
2011-2020
International Ocean Discovery Program
2017
Sorbonne Université
1991-2014
Pacific Northwest National Laboratory
2014
Rutgers, The State University of New Jersey
2014
This paper discusses the geological and geophysical data available on mid‐ocean ridges with outcrops of serpentinized mantle peridotites, objective better constraining modes emplacement these rocks in seafloor. Ridges peridotites are most cases characterized by slow‐spreading rates, every case deep axial valleys. Such valleys thought, based constraints mechanical modelling results, to characterize a thick lithosphere. A predictable effect lithosphere is that it should prevent magmas from...
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| January 01, 1995 Thin crust, ultramafic exposures, and rugged faulting patterns at the Mid-Atlantic Ridge (22°–24°N) Mathilde Cannat; Cannat 1CNRS/Universite Pierre et Marie Curie, Laboratoire de Petrologie, 4 place Jussieu 75252 Paris, France Search for other works by this author on: GSW Google Scholar Catherine Mevel; Mevel Marcia Maia; Maia 2CNRS/Universite Bretagne Occidentale, 6 avenue Le Gorgeu, 29275 Brest, Christine Deplus; Deplus 3CNRS/Institut Physique du Globe,...
Thermal models based on the geometry of axial segmentation, and mechanical valley formation, suggest that lithosphere slow spreading ridges can be thicker than crust modeled from gravity data, or measured seismic data. This is particularly case in thin ridge regions are near discontinuities. The temperature field these such some melts extracted asthenosphere should crystallize mantle, before they reach crust. prediction consistent with observations made gabbroic ultramafic samples collected...
Research Article| April 01, 1990 Alpine Jurassic ophiolites resemble the modern central Atlantic basement Yves Lagabrielle; Lagabrielle 1Unité de recherche associée, CNRS, no. 1279, Géodynamique, Université Nice, Parc Valrose 06034 Nice Cédex, France Search for other works by this author on: GSW Google Scholar Mathilde Cannat 2Groupement Recherche, Genèse et Evolution des Domaines Océaniques, 6, Avenue Le Gorgeu 29287 Brest Author and Article Information Publisher: Geological Society of...
We have compiled new and published data on the magnetic properties of 245 serpentinized abyssal peridotites from seven Deep Sea Drilling Project Ocean Program sites. The susceptibility ( K ) these samples does not increase linearly with degree serpentinization S ). Instead, remains modest in partially < 75%) then increases rapidly. rate formation magnetite during as iron content serpentine minerals decreases: ∼6% FeO first stages only 2–3% proceeds beyond ∼ 75%. Contrasting remanent...
The kinetics of the reaction (Mg,Fe)‐olivine + H 2 O → serpentine magnetite brucite were investigated at 500 bars in 250–350°C range using natural olivine (San Carlos; Fo 91 ) with grain sizes between 1 and 150 μ m for run durations up to 514 d. amount produced, which directly relates progress, was accurately monitored 24 time‐resolved magnetic measurements per experiment. Eighty percent serpentinization achieved after 60 d 5–15 50–63 m. Serpentinization found be inversely proportional...
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...
The comparison of segment lengths, relief, and gravity signature along the very slow spreading Southwest Indian Ridge (SWIR) between 49°E 69°E suggests that marked change in segmentation style occurs across Melville transform (60°45′E) reflects a modes formation axial topography. We propose relief east is largely due to volcanic constructions load lithosphere from above. By contrast, segments west fracture zone appears be primarily due, as proposed for faster Mid‐Atlantic Ridge, along‐axis...
A suite of 53 samples mantle spinel lherzolites and harzburgites dredged at 13 sites between 52°E 68°E along the Southwest Indian Ridge has been studied for petrography mineral major element chemistry. Results show that residual beneath this very slow‐spreading/cold ridge is strongly heterogeneous in modal compositions local regional scales underwent greater extents melting than predicted by model basalts with peridotites. Along‐axis, peridotite compositional variability defines a concave...
We present new high‐resolution bathymetry and backscatter data acquired in 2006 with the ROV Victor 6000 over Lucky Strike hydrothermal field, Mid‐Atlantic Ridge. As long‐term monitoring of area (MoMAR project) is being implemented, these offer an unprecedented view distribution edifices, eruptive facies, small‐scale tectonic features vent field. show that vents located NW NE correspond wide expanses lumpy seafloor which we interpret as primarily made broken chimneys sulfide edifices. They...
Regional axial depths, mantle Bouguer anomaly values, geochemical proxies for the extent of partial melting and tomographic models along Southwest Indian Ridge (SWIR) all concur in indicating presence thicker crust hotter between Indomed Gallieni transform faults (TFs; 46°E 52°20′E) relative to neighbouring ridge sections. Accreted seafloor these TFs over past ∼10 Myr is also locally much shallower (>1000 m) corresponds (>1.7 km) than previously accreted same region. Two large outward facing...