Lithium (Li) contents and isotopes were studied in all environments of a small river catchment draining granite in the Margeride mountains of the French Massif Central. This covered surface waters, primary and accessory minerals of the granites, the whole rock, and soil and sediment samples developed in the catchment, completed with regional data f...
Recent advances in laser spectroscopy have allowed for real-time measurements of the 13C/12C isotopic ratio in CO2, thereby providing new ways to investigate carbon cycling in natural ecosystems. In this study, we combined an Aerodyne quantum cascade laser spectrometer for CO2 isotopes with a LI-COR LI-8100A/8150 automated chamber system to measure...
Recent advances in laser spectroscopy have allowed for real-time measurements of the 13C/12C isotopic ratio in CO2, thereby providing new ways to investigate carbon cycling in natural ecosystems. In this study, we combined an Aerodyne quantum cascade laser spectrometer for CO2 isotopes with a LI-COR LI-8100A/8150 automated chamber system to measure...
The Mo-Cu-W Azegour skarn, located in the High-Atlas in Morocco, is associated with a Late Hercynian alkaline granitic intrusion. Here the origin of the mineralisation via Re-Os geochronology and using Mo, S and Pb isotopes is discussed. The age of mineralisation defined by Re-Os molybdenite geochronology is 276 ± 1.2 Ma for the Azegour mine, and 2...
The Lomagundi Event (LE) was a period in Paleoproterozoic Earth history during which carbon isotopic composition of carbonates deposited globally record highly positive isotopic values (averaging at +8 ‰ VPDB). Current geochronological constraints from basins worldwide have bracketed the LE between ~2.22 and 2.06 Ga (Karhu and Holland, 1996; Bekker...
Study region: The Bromo-Tengger volcanic aquifer system, (East Java, Indonesia). Study focus: Andesitic volcanic aquifers in Indonesia are an important source of groundwater supply for the population. The artesian flow from high discharge springs facilitates the access for irrigation and drinking water but continuously flowing artesian wells exert ...
Les conditions redox des océans ont considérablement évolué au cours du Précambrien. Ceci est principalement dû à l’arrivée de l’oxygène engendrant dans un premier temps des oasis d’oxygène puis un Grand Évènement d’Oxydation (GEO) vers 2.45 Ga. Néanmoins, les connaissances concernant la datation des premiers signes d’oxygénation et les mécanismes ...
Les astéroïdes carbonés ont été affectés par des processus d’altération aqueuse qui ont largement modifié leur minéralogie primaire au profit d’une grande diversité de phases néoformées. Malgré les nombreuses études conduites sur les chondrites hydratées (chondrites CM), la compréhension des processus physico-chimiques de l’altération aqueuse et le...
Published in Mycorrhiza
Drought is a limiting factor for crop production, especially in arid and semi-arid climates. In this study, Sorghum bicolor plants were inoculated, or not, with Rhizophagus irregularis, an arbuscular mycorrhizal (AM) strain typical for temperate climates, or Rhizophagus arabicus, a strain endemic to hyper-arid ecosystems. Plants were grown under we...
Published in Plant and Soil
Background and aimsSoil organic carbon (SOC) accrual is central to the discussion on active atmospheric CO2 removal strategies, but it requires a clear understanding of the mechanisms driving new SOC formation. SOC is formed from the decomposition of above- and below-ground plant inputs, yet their accurate quantification remains a major challenge. ...
