A5071151967- Geology and Paleoclimatology Research
- Methane Hydrates and Related Phenomena
- Geochemistry and Elemental Analysis
- Geological formations and processes
- Hydrocarbon exploration and reservoir analysis
- Paleontology and Stratigraphy of Fossils
- Geological and Geochemical Analysis
- Geological and Geophysical Studies
- Astro and Planetary Science
- Geochemistry and Geologic Mapping
- Planetary Science and Exploration
- Radioactive element chemistry and processing
- Isotope Analysis in Ecology
- Geomagnetism and Paleomagnetism Studies
- Spacecraft and Cryogenic Technologies
- Pleistocene-Era Hominins and Archaeology
- Offshore Engineering and Technologies
- Geophysics and Gravity Measurements
- Geological and Geophysical Studies Worldwide
- Groundwater and Isotope Geochemistry
- Astronomical Observations and Instrumentation
- Marine and environmental studies
- earthquake and tectonic studies
- Solar and Space Plasma Dynamics
- Scientific Research and Discoveries
Ifremer
2016-2025
Centre National de la Recherche Scientifique
2022-2025
Université de Bretagne Occidentale
2022-2024
Fonctionnement écologique et gestion durable des agrosystèmes bananiers et ananas
2015-2023
Institut Universitaire Européen de la Mer
2021
Royal Museum for Central Africa
2015-2020
Laboratoire de Biotechnologie et Chimie Marines
2009-2020
United States Marine Corps
2010-2016
Institut Français
2006-2013
Johannes Gutenberg University Mainz
2010
From measurements of Hf–Yb mixtures, we have found that the correction isobaric interferences involving accepted Yb isotope ratios and reasonable estimates mass bias result in a significantly under-corrected 176Hf, which is proportional to amount added. This can be explained by (1) significant difference instrumental between Hf Yb, (2) values for isotopic within and/or systems are incorrect. We evaluated these possibilities measuring mixed solutions on two MC-ICP-MS instruments undertaking...
Changes in deep ocean ventilation are commonly invoked as the primary cause of lower glacial atmospheric CO2. The water mass structure Atlantic Ocean and mechanism by which it may have sequestered carbon remain elusive. Here we present neodymium isotope measurements from cores throughout that reveal glacial-interglacial changes distributions. These results demonstrate sustained production North Deep Water under conditions, indicating southern-sourced waters were not spatially extensive...
About 3000 years ago, a major vegetation change occurred in Central Africa, when rainforest trees were abruptly replaced by savannas. Up to this point, the consensus of scientific community has been that forest disturbance was caused climate change. We show here chemical weathering reconstructed from geochemical analyses marine sediment core, intensified at same period, departing substantially long-term fluctuations related Late Quaternary climate. Evidence event also contemporaneous with...
Based on acquired geophysical, geological and geotechnical data modeling, we suggest hydrate dissolution to cause sediment collapse pockmark formation in the Niger delta. Very high‐resolution bathymetry from delta reveal morphology of pockmarks with different shapes sizes going a small ring depression surrounding an irregular floor more typical uniform depression. Geophysical data, situ piezocone measurements, piezometer measurements cores demonstrate presence common internal architecture...
Research Article| May 01, 2015 Human impact overwhelms long-term climate control of weathering and erosion in southwest China Shiming Wan; Wan * 1Key Laboratory Marine Geology Environment, Institute Oceanology, Chinese Academy Sciences, Qingdao 266071, *E-mail: wanshiming@ms.qdio.ac.cn Search for other works by this author on: GSW Google Scholar Samuel Toucanne; Toucanne 2IFREMER, Unité de Recherche Géosciences Marines, BP70, 29280 Plouzané, France Peter D. Clift; Clift 3Department...
We present a revised method for the determination of concentrations rare earth (REE) and other trace elements (Y, Sc, Zr, Ba, Hf, Th) in geological samples. Our analytical procedure involves sample digestion using alkaline fusion (NaOH‐Na 2 O ) after addition Tm spike, co‐precipitation on iron hydroxides, measurement by sector field‐inductively coupled plasma‐mass spectrometry (SF‐ICP‐MS). The was tested successfully various rock types (i.e., basalt, ultramafic rock, sediment, soil,...