A5001972326- Geological and Geochemical Analysis
- Geology and Paleoclimatology Research
- earthquake and tectonic studies
- Geochemistry and Geologic Mapping
- Geological formations and processes
- Nuclear Physics and Applications
- Solar and Space Plasma Dynamics
- Geological and Geophysical Studies Worldwide
- High-pressure geophysics and materials
- Nuclear Materials and Properties
- Nuclear reactor physics and engineering
- Paleontology and Stratigraphy of Fossils
- Information Technology and Learning
- Hydrocarbon exploration and reservoir analysis
- Geological and Tectonic Studies in Latin America
- Archaeology and ancient environmental studies
- Clay minerals and soil interactions
- Radioactive element chemistry and processing
- Geochemistry and Elemental Analysis
- Multi-Agent Systems and Negotiation
- Usability and User Interface Design
Centre de Recherches Pétrographiques et Géochimiques
2024
Université de Rennes
2022-2024
Université de Lorraine
2024
Centre National de la Recherche Scientifique
2020-2024
Géosciences Rennes
2022-2024
Geosciences Paris-Saclay
2018-2022
Université Paris-Saclay
2020-2022
Université Paris-Sud
2018-2020
The dynamics of tropical weathering through time with the formation and long-term evolution laterite associated climatic geodynamic forcing is still a poorly explored issue. To better access this, we focused on lateritic-bauxitic duricrusts from well-explored, 300 m high Kaw mountain in northeastern French Guiana. Macroscopically homogeneous Fe (oxyhydr)oxides-rich subsamples were separated 10 bulk samples. Bulk- investigated by mineralogical geochemical analyses (U-Th)/He geochronology....
Apatite fission track (AFT) dating is now routinely performed using LA‐ICP‐MS, and U‐Pb age data are often acquired at the same time, allowing double of individual grains. Furthermore, additional geochemical data, such as REE mass fractions readily during analysis. It therefore practical interest to identify a single material quality control on ages composition. Here we present AFT for McClure Mountain Syenite (MMS) apatite, already widely used an reference by community. We 238 grains, in...
Abstract. Apatite and zircon (U–Th) / He thermochronological data are obtained through a combination of crystal selection, content measurement by heating with analysis using noble gas mass spectrometry, U, Th, Sm contents dissolution as well solution inductively coupled plasma spectrometry (ICP-MS). This contribution documents the methods for helium thermochronology used at GEOPS laboratory, Paris-Saclay University, between 2007 present that allow apatite to be precision. More specifically,...
Abstract Knowledge of the Guiana Shield evolution during Gondwana break‐up is key to a better understanding craton dynamics and margin response transtensional opening. To improve this knowledge, we investigated thermal French Guiana, using several low‐temperature thermochronology methods applied basement rocks, including apatite zircon (U‐Th)/He fission tracks. Inverse modelling results allows us reconstruct Phanerozoic history give preview evolution. Three main events are inferred: firstly,...
Abstract. Apatite and zircon (U-Th)/He thermochronological data are obtained through a combination of crystal selection, He content measurement by extraction from analysis using noble gas mass spectrometry, U, Th Sm contents dissolution solution inductively coupled plasma spectrometry (ICP-MS). In this contribution, we detail the complete protocols developed for over more than decade that allow apatite to be with precision. More specifically, show can determined high precision calibration...
Abstract. This study details the procedures developed between 2021 and 2023 at Géosciences Rennes lab (GeOHeLiS plateform, University, France) for obtaining precise (U–Th)/He thermochronological data on apatite. The methodology involves crystal selection, measuring helium (4He) content by heating crystals, analyzing them using noble gas mass spectrometry. Additionally, determining U, Th, Sm contents is achieved through dissolution subsequent solution analysis with triple-quadrupole...
In low temperature thermochronology, reliable interpretation of (U-Th)/He data is controlled by our understanding helium diffusion in a crystal. The kinetics can be simulated through the classic Arrhenius-type equation, with parameters frequency factor Do and activation energy Ea (Farley, 2000). For apatite, it has been demonstrated that accumulated radiation damage perturbed equation exerts strong control on He diffusion. Two models have developed to parameterise evolution apatite terms...
<p>During the last decade, study of south Patagonian Andes and Antarctic area have demonstrated occurrence a complex mantle setup during pre-Atlantic opening (200-140 Ma) with formation disappearance an anomalous flat slab (~1000 km long), combined Karoo Plume development western migration. In foreland, this period is characterized by plutons emplacement distant from arc, flowed major volcanic income, Chon Aike Large Igneous Province (~180 Ma to ~160 Ma). These...
<p>The northern Tyrrhenian Sea and the inner Apennines (NA) are classically regarded as a late Miocene–Pleistocene back-arc system characterized by crustal extension acidic magmatism coeval with shortening farther east at front of belt. The orogenic prism NA, which is well exposed in easternmost Island Elba, formed eastward thrusting, stacking folding oceanic continental units from Eocene down to Miocene. Eastern Elba hosts historically economically most important...