A5019964072- Geology and Paleoclimatology Research
- Geological and Geochemical Analysis
- Geological formations and processes
- earthquake and tectonic studies
- Paleontology and Stratigraphy of Fossils
- Geochemistry and Elemental Analysis
- Isotope Analysis in Ecology
- Geological and Geophysical Studies Worldwide
- Silicon Effects in Agriculture
- Heavy metals in environment
- Methane Hydrates and Related Phenomena
- Maritime and Coastal Archaeology
- Marine and environmental studies
- Archaeology and ancient environmental studies
- Heavy Metals in Plants
- Geological Studies and Exploration
- Geomagnetism and Paleomagnetism Studies
- Groundwater and Isotope Geochemistry
- Pleistocene-Era Hominins and Archaeology
- Radioactive element chemistry and processing
- Evolution and Paleontology Studies
- Geological and Geophysical Studies
- Marine and coastal ecosystems
- Geochemistry and Geologic Mapping
- Aluminum toxicity and tolerance in plants and animals
Centre de Recherche et d’Enseignement de Géosciences de l’Environnement
2017-2024
Aix-Marseille Université
2017-2024
Centre National de la Recherche Scientifique
2008-2024
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2020-2024
Institut de Recherche pour le Développement
2017-2024
Sustainable Europe Research Institute
2017-2024
Collège de France
2020-2023
Centre d’études et de Recherches sur l’espace Germanophone
2023
Université Paris-Saclay
2021
Geosciences Paris-Saclay
2021
Abstract Microporous carbonates can constitute excellent hydrocarbon reservoirs if their micropore and/or nanopore structure is sufficiently developed and continuous. In such deposits, assessing the exact timing of reservoir property stabilization critical to better understand postdepositional processes favorable creation or preservation porosity. However, placing reliable accurate chronological constraints on formation microporosity in these a major challenge. this study we performed...
The sedimentary sequence of the eastern Mediterranean is often marked by organic-rich layers called sapropels. Sapropel formation was mainly caused excess freshwater input and subsequent reduction ventilation due to an enhanced African monsoon combined with deglacial water input. However, paleoriver discharge from North Africa under interglacial glacial boundary conditions its impact on sapropel has not been fully clarified yet. We obtained Nd isotopic composition (εNd) record...
The seismic potential of the Lesser Antilles megathrust remains poorly known, despite hazard it poses to numerous island populations and its proximity Americas. As has not produced any large earthquakes in instrumental era, is often assumed be aseismic. However, historical records great 19th century earlier, which were most likely ruptures, demonstrate that subduction entirely Recent occurrences giant areas where such events previously thought improbable have illustrated importance...
Abstract The Eastern Mediterranean Sea (EMS) is a key region to study circulation change because of its own thermohaline circulation. In this study, we focused on intermediate/deep water since the Last Glacial Maximum (LGM) including sapropel S1 period. Two cores from Levantine and Strait Sicily, respectively, collected at 1,780 m 771 depth, were studied using 143 Nd/ 144 Nd ( ε ) foraminiferal tests leachates as well benthic stable isotopes (δ 13 C, δ 18 O). This approach allowed...
Abstract. In the Western Alps, Penninic frontal thrust (PFT) is main crustal-scale tectonic structure of belt. This transported high-pressure metamorphosed internal units over non-metamorphosed European margin during Oligocene (34–29 Ma). Following propagation compression toward foreland, PFT was later reactivated as an extensional detachment associated with development High Durance fault system (HDFS). inversion displacement along a major has been widely emphasized example collapse...
Abstract. Lake Maryut (northwestern Nile Delta, Egypt) was a key feature of Alexandria's hinterland and economy during Greco-Roman times. Its shores accommodated major economic centers, the lake acted as gateway between valley Mediterranean. It is suggested that lake-level changes, connections with sea, possible high-energy events considerably shaped human occupation history Maryut. To reconstruct hydrology in historical times, we used faunal remains, geochemistry (Sr isotopic signature...
The mechanisms and pace of orbital forcing on precipitation in inland Asia during the Cenozoic remain poorly understood. Many previous studies using magnetic proxies for have shown a consistent signal long eccentricity (405 kyr) hydrological records central China that are younger than ca. 11 Ma. Most suggest variations rainfall amount were controlled by Northern Hemisphere summer insolation, peak is associated with maxima. Here, we report multiple dating back to Middle Miocene Climatic...
This study presents the first application of U/Pb dating method to highly Pb-depleted diagenetic geodic calcites Jurassic formations Paris Basin that leads a reappraisal palaeohydrological history this region. Composite ages from multiple geodes, combined with δ 18 O analyses, reveal two main phases fluid circulations linked major regional tectonic events. Dogger recorded episode at 147.8 ± 3.8 Ma, i.e. very beginning emersion basin during Tithonian period and 30 Ma earlier than previously...
Germanium (Ge) exists at trace levels in the Earth's crust and is a powerful geochemical tracer of silicon (Si) cycle. This study proposes simple reliable method for determining Ge contents environmental samples using ICP‐MS. As Si have very similar chemical properties, we investigated applicability preparation procedure developed isotopes determination samples. Advantages this are as follows: (a) efficient removal matrix main interferences affecting determinations by ICP‐MS, (b) low limit...
Abstract In the context of increasing evidence plate interface coupling variability in subduction zones, there is a need to extend short time window given by instrumental data and gather over multiple spatial scales. We hence investigated long‐term topography on Barbuda island, located northern part Lesser Antilles, west Caribbean zone. Following pioneering work using set marine terraces eastern side we performed first U‐Th dating 10 corals growth position from lowest terrace, for which...
The study of paleo shorelines, particularly those formed during the late Quaternary, provides robust insights into past climate variability. Advances in surveying techniques and chronological methodologies have dramatically improved inter-comparability regional basin-wide shoreline surveys. However, these advances been applied unevenly across globe. This is especially true southwestern Madagascar, where, 1960s 1970s, emerged Pleistocene beach reef facies were first described detail dated to...
Sahara sands have been proposed to result from the extensive and repetitive recycling of much older sedimentary rocks -- a necessary mechanism explain their petrographic maturity similarity detrital zircon populations at continental scale. Where how this occurs today remain poorly understood. This study investigates source modern southeastern by leveraging on large (n > 7800) new dataset ages rocks, ancient dune fields in Chad Cameroon. We show that age noticeable regional differences when...
The Apt Basin, sub-basin of the wider Manosque Basin southeastern France, contains deposits Eocene-Oligocene lake systems that were part a broader network evaporative lakes and lagoons spread across European Cenozoic rift system. onset mechanisms subsidence in system, interconnectivity these lakes, their response to transition into Oligocene icehouse are poorly understood. This study aims clarify points by examining stratigraphy depositional environments Basin. We correlate date Eocene...
Abstract Early Late Cretaceous uplift of Provence gave rise to the Durance Isthmus. In present study, U–Pb dating on calcite compressional structures related Pyrenean foreland deformation in shows that N‐S shortening occurred coeval with emersion Isthmus, through development combined top‐to‐the‐North NW thrusts between 97 and 90 Ma. This large‐scale event, recorded from Pyrenees Middle‐East regions is interpreted as a far‐field internal plate precursor Africa‐Europe plates reorganization....