A5068311524- Paleontology and Stratigraphy of Fossils
- Geology and Paleoclimatology Research
- Hydrocarbon exploration and reservoir analysis
- Isotope Analysis in Ecology
- Methane Hydrates and Related Phenomena
- Geological and Geochemical Analysis
- Geochemistry and Elemental Analysis
- Astro and Planetary Science
- Planetary Science and Exploration
- Geochemistry and Geologic Mapping
- Geological and Geophysical Studies Worldwide
- Marine Biology and Ecology Research
- Atmospheric and Environmental Gas Dynamics
- Space Science and Extraterrestrial Life
- Geological Studies and Exploration
- Groundwater and Isotope Geochemistry
- Geological and Geophysical Studies
- Evolution and Paleontology Studies
- Geological formations and processes
- Historical Geography and Geographical Thought
- Coral and Marine Ecosystems Studies
- CO2 Sequestration and Geologic Interactions
- Geotourism and Geoheritage Conservation
- Historical and Literary Studies
- Marine and coastal ecosystems
Centre National de la Recherche Scientifique
2012-2024
Sorbonne Université
2020-2024
Muséum national d'Histoire naturelle
2020-2024
Institut de minéralogie, de physique des matériaux et de cosmochimie
2019-2024
Laboratoire de Minéralogie & Cosmochimie du Muséum
2022-2023
Institut Universitaire Européen de la Mer
2016-2021
Institut de Recherche pour le Développement
2020-2021
Université de Bretagne Occidentale
2016-2020
Structure et Instabilité des Génomes
2020
Océanopolis
2014-2019
Significance Changes in sulfur isotope ratios ( 34 S/ 32 S) of marine phases are often attributed to global biogeochemical perturbations. Sediments collected on the shelf Gulf Lion revealed remarkable isotopic fluctuations sedimentary pyrite over last 500,000 years, ranging between −44.0‰ and 32.3‰. We suggest this pattern is related changes local environmental deposition, specifically, sedimentation modulating connectivity with overlying water column resulting microbial activity. Besides...
Abstract Microbialites are widespread in modern and fossil hypersaline environments, where they provide a unique sedimentary archive. Authigenic mineral precipitation microbialites results from complex interplay between microbial metabolisms, organic matrices environmental parameters. Here, we combined mineralogical microscopic analyses with measurements of metabolic activity order to characterise the mineralisation mats forming Great Salt Lake (Utah, USA). Our show that process takes place...
Abstract Eukaryotic algae rose to ecological relevance after the Neoproterozoic Snowball Earth glaciations, but causes for this consequential evolutionary transition remain enigmatic. Cap carbonates were globally deposited directly these they are usually organic barren or thermally overprinted. Here we show that uniquely-preserved cap dolostones of Araras Group contain exceptional abundances a newly identified biomarker: 25,28-bisnorgammacerane. Its secular occurrence, carbon isotope...
Carbon isotope compositions of both sedimentary carbonate and organic matter can be used as key proxies the global carbon cycle its evolution through time, long they are acquired from waters where dissolved inorganic (DIC) is in equilibrium with atmospheric CO2. However, shallow water platforms epeiric settings, influence local to regional parameters on cycling may lead DIC variations unrelated cycle. This especially true for terminal Neoproterozoic, when Gondwana assembly isolated masses...
Abstract Precambrian hydrocarbons and their corresponding source rocks are distinctly different from Phanerozoic counterparts, having been deposited in persistently anoxic environments ecosystems dominated by bacteria. Here, we show that cyclic enrichment of organic matter the world’s oldest hydrocarbon play (ca. 1.38 Ga), is not associated with flooding surfaces unrelated to variations mineralogy or changes relative rate clastic biogenic sedimentation—factors typically attributed shales....
Abstract After permanent atmospheric oxygenation, anomalous sulfur isotope compositions were lost from sedimentary rocks, demonstrating that chemistry ceded its control of Earth’s surficial cycle to weathering. However, mixed signals anoxia and oxygenation in the record between 2.5 2.3 billion years (Ga) ago require independent clarification, for example via oxygen isotopes sulfate. Here we show <2.31 Ga barium sulfates (barites) Turee Creek Basin, W. Australia with positive anomalies ∆...
Serpentinitic systems are potential habitats for microbial life due to frequently high concentrations of energy substrates, such as hydrogen (H2), methane (CH4), and short-chain organic acids (SCOAs). Yet, many serpentinitic also physiologically challenging environments highly alkaline conditions (pH > 10) elevated temperatures (>80°C). To elucidate the possibility in deep crustal environments, International Ocean Discovery Program (IODP) Expedition 366 drilled into Yinazao, Fantangisña,...