A5091880574- Geology and Paleoclimatology Research
- Astro and Planetary Science
- Geological and Geochemical Analysis
- earthquake and tectonic studies
- Isotope Analysis in Ecology
- Groundwater and Isotope Geochemistry
- Geological and Geophysical Studies Worldwide
- Hydrocarbon exploration and reservoir analysis
- Planetary Science and Exploration
- Geological formations and processes
- Landslides and related hazards
- Geochemistry and Geologic Mapping
- Methane Hydrates and Related Phenomena
- Stellar, planetary, and galactic studies
- Paleontology and Stratigraphy of Fossils
- Cryospheric studies and observations
- High-pressure geophysics and materials
- Spacecraft and Cryogenic Technologies
- Astrophysics and Star Formation Studies
- Geochemistry and Elemental Analysis
- Heavy metals in environment
- Geomagnetism and Paleomagnetism Studies
- Polar Research and Ecology
- Karst Systems and Hydrogeology
- Aeolian processes and effects
Centre de Recherches Pétrographiques et Géochimiques
2013-2024
Centre National de la Recherche Scientifique
2015-2024
Université de Lorraine
2015-2024
Délégation Centre-Est
2023
Université Claude Bernard Lyon 1
2009-2011
Laboratoire de Géologie de Lyon : Terre, Planètes et Environnement
2011
The origin of Earth's water remains unknown. Enstatite chondrite (EC) meteorites have similar isotopic composition to terrestrial rocks and thus may be representative the material that formed Earth. ECs are presumed devoid because they in inner Solar System. is therefore generally attributed late addition a small fraction hydrated materials, such as carbonaceous meteorites, which originated outer System where was more abundant. We show EC contain sufficient hydrogen delivered Earth at least...
Serpentinites are an important sink for both inorganic and organic carbon, their behavior during subduction is thought to play a fundamental role in the global cycling of carbon. Here we show that fluid-derived veins preserved within Zermatt-Saas ultra-high pressure serpentinites providing key evidence carbonate mobility serpentinite devolatilisation. We through O, C, Sr isotope analyses vein minerals host about 90% meta-serpentinite carbon remobilized slab In contrast, graphite-like...
Recent thermodynamic and experimental studies have suggested that volatile organic compounds (e.g., methane, formate, acetate) can be produced stabilized in subduction zones, potentially playing an important role the deep carbon cycle. However, field evidence for high-pressure production storage of solid is missing. Here, we examine forearc serpentinite clasts recovered by drilling mud volcanoes above Mariana zone. Notable correlations between iron stable-isotope signatures fluid-mobile...
Abstract We present new data from the debris-rich basal ice layers of NEEM core (NW Greenland). Using mineralogical observations, SEM imagery, geochemical silicates (meteoric 10 Be, εNd, 87 Sr/ 86 Sr) and organic material (C/N, δ 13 C), we characterize source material, succession previous glaciations deglaciations paleoecological conditions during ice-free episodes. Meteoric Be grain features indicate that sheet interacted with paleosols eroded fresh bedrock, leading to mixing in these...
Abstract Identifying the roles of erosional processes in denudation mountain ranges requires a better understanding sensitivity to climatic, topographic, or lithologic controls. We analyzed erosion Narayani River basin (draining central Nepal and presenting contrasted geochemical signatures its outcropping rocks wide variety climatic conditions) assess relative contributions annual sediment export. By combining acoustic Doppler current profiler measurements with depth profiles daily surface...
Abstract The origin and transport of water in the early Solar System is an important topic both astrophysics planetary science, with applications to protosolar disk evolution, formation, astrobiology. Of particular interest for understanding primordial are unequilibrated ordinary chondrites (UOCs), which have been affected by very limited alteration since their formation. Using X‐ray diffraction isotope ratio mass spectrometry, we determined bulk mineralogy, H 2 O content, D/H ratios 21 UOCs...
During the Albian, hyperextension of Pyrenean passive margin led to a hyperthinning continental crust and subsequent subcontinental mantle exhumation. The giant Trimouns talc-chlorite deposit represents most prominent occurrence Albian metasomatism in Pyrenees, with largest talc worldwide. Consequently, this deposit, which is located on fault zone lithological contact, one major drains at scale Pyrenees best geological targets order determine origin(s) fluid(s) that circulated during period....
Abstract The formation of ore deposits in the Lavrion Pb-Zn-Ag district was associated with Miocene detachment that accommodated orogenic collapse and exhumation high-grade nappes across ductile-brittle transition. This consists (1) low-grade porphyry Mo style, (2) Cu-Fe skarn, (3) high-temperature carbonate replacement Pb-Zn-Ag, (4) vein breccia mineralization. mineralization locally contains silver base metal sulfides are cemented by fluorite gangue. rare earth element contents these...