Post-doctoral position in Isotope Geochemisty of the Earth Surface
« RElationship between Climate change and lAterite formation «
We are seeking a postdoctoral fellow to join our project funded by The French National Research Agency (ANR) RECA. This project is dedicated to (1) a better understanding of the processes at play during the formation of deep weathering profiles, under tropical conditions (laterites); (2) the quantification of element transfer within and out of the weathering profiles during these processes, (3) the use of the isotope geochemistry of laterites – and of specific secondary mineral phases they host – as a record of environmental and climatic conditions prevailing during their formation.
This work will be performed through the systematic study of selected lateritic profiles, covering different formation ages over the Mesozoic and Cenozoic, located across Brasil, Suriname, and French Guyana. Some samples have already been recovered, and additional field trips (the first one being in Oct.-Nov. 2019) are planned within the frame of the RECA project.
The postdoctoral researcher will use major and trace element geochemistry, as well as isotope geochemistry (Li, Si, Fe), to characterize weathering processes and quantify mass transfer during the formation of lateritic profiles. Experimental protocols will involve both, bulk soil dissolutions and in-situ laser ablation analyses of selected mineral phases. The measurements will be performed using ICP MS and MC-ICP MS at IPG Paris (Li isotopes, laser ablation) and at CEREGE, Aix-en-Provence (Fe and Si isotopes). The postdoctoral researcher will conduct his/her particular project in a strong synergy with all aspects of the wider RECA project, that are led by other partners: dating of laterite formation (Université Paris Sud / Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, Paris); hydrogen and oxygen isotope geochemistry of laterites (Institut de Physique du Globe de Paris); weathering geochemistry and mineralogy of laterites (Université Paris Sud); modeling of lateritic profile development (Université Paris Sud / GFZ Potsdam).
Applications from candidates with a broad knowledge and experience in the isotope geochemistry of weathering and/or with advanced skills in isotope geochemistry (including laser ablation) are particularly welcome.
IPGP (Institut de Physique du Globe de Paris) is the largest Earth Science Institute in France (http://www.ipgp.fr), and is hosted in a research facility built in 2011 and located in the vibrant city center of Paris. CEREGE (Centre for Research and Teaching in Environmental Geoscience) is a strongly interdisciplinary institute specialized in Geosciences of the environment, located in Southern France (Aix en Provence).
The contract is expected to start between September 1st and December 1st 2018. This is a full-time appointment with a duration of 18 months. The compensation will be commensurate with qualifications and experience, based on the French CNRS wage scale.
Applications should consist of a CV and two reference letters (sent directly by the referees) sent by June 30th 2018.
CNRS – Institut de Physique du Globe de Paris (IPGP)
INRA – CEREGE