We are seeking a postdoctoral fellow to join our project on "Weathering in large tropical floodplains", recently funded by the city of Paris through the "Émergences" program. This project is devoted to a better understanding of the role of large alluvial floodplains in global biogeochemical cycles, especially through chemical weathering of mountain-derived sediments.
The postdoctoral researcher is expected to use major and trace element geochemistry, as well as isotope geochemisty (Sr, Nd, Li, Si), to characterize provenance and weathering intensity of floodplain sediments as a function of deposit age (e.g. based on 14C and fallout nuclides). This will be achieved using floodplain cores already sampled and dated in Brazil, Peru and Venezuela (Amazon and Orinoco basins), and other field trips to these countries are planned in the frame of the current project. These data should ultimately serve to derive weathering fluxes from floodplains at the scale of the large tropical basins. We are also seeking for a specific isotope signature of floodplains sediments that could be used in sedimentary archives to trace the role of floodplains in the transfer of sediment from land to sea. Applications from candidates with a broad knowledge and experience in the isotope geochemistry of weathering are particularly welcome, although other aspects of the project relate to the fundamental understanding of the physics of river bed sediment transport based on theoretical and experimental work, and the micro-scale characterization of chemical gradients through biofilms at the alluvial sediment / water interface using spectroscopic techniques. Such aspects could also be developed in the frame of the post-doctoral researcher's work.
IPGP 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.
The contract is expected to start between February 1st and March 31st 2017. This is a full-time appointment with a duration of 24 months. The compensation will be commensurate with qualifications and experience, based on the French CNRS (researcher) wage scale.
Applications should consist of a CV and two reference letters (sent directly by the referees) sent by December 15th 2016.
CNRS - Institut de Physique du Globe de Paris