Postdoctorant isotope geochemistry M/F

Job Description

Missions

Within the OxicEarth project, the postdoctoral researcher will be primarily responsible for performing thallium isotopic analyses on Late Archean and Paleoproterozoic sediments using multiple collector inductively coupled plasma mass spectrometry (MC-ICPMS). They will also carry out sample digestion using concentrated acids and thallium separation from the matrix by liquid ion-exchange chromatography. These analyses aim to understand the variations in ocean oxygenation before, during, and after the first sustained oxygenation of the atmosphere. The postdoctoral researcher will also provide laboratory supervision to a doctoral student from the University of Toulouse, who will measure the thallium isotopic composition in sulfide precipitation experiments. These experiments aim to understand whether isotopic fractionation of thallium is likely during sediment deposition when the oceans contained little sulfur.

Activity

- Characterization and analysis of sediments by MC-ICPMS
- Elemental analysis by ICPMS
- Data processing, analysis, and interpretation
- Presentation of results at international conferences and writing of scientific articles for peer-reviewed journals Skills

Your Profil

Skills

- Proficiency in various analytical techniques in geochemistry (MC-ICPMS, ICPMS, liquid ion-exchange chromatography)
- Strong knowledge of sedimentology and isotopic geochemistry
- Ability to conduct a research project independently
- Ability to integrate into a team and collaborate with researchers from diverse disciplines
- Scientific rigor, motivation, and initiative
- Excellent written and oral communication skills in English

Your Work Environment

The Centre for Petrographic and Geochemical Research (CRPG, UMR 7358), located in Vandoeuvre-lès-Nancy, in the Grand Est region, is a geosciences research laboratory associated with both The position is based at the French National Centre for Scientific Research (CNRS) and the University of Lorraine (UL) (https://crpg.univ-lorraine.fr/). The successful candidate will interact at the CRPG with researchers and research support staff on the "IRISS" platforms, as well as with researchers and students working on the theme of "cycles, atmosphere, climate." They will have access to a variety of analytical equipment. Frequent interaction is planned with members of Sune Nielsen's research group (DR2, CNRS).

Additional information: Candidates must submit a CV (maximum 4 pages) and contact information for two references via the CNRS website. Contact: Dr. Sune Nielsen (sune.nielsen@univ-lorraine.fr)

Constraints and risks

- Risks related to electricity (high voltage) and concentrated acids

Compensation and benefits

Compensation

Between 3,072 and 4,258.87 euros gross monthly (according to experience)

Annual leave and RTT

44 jours

Remote Working practice and compensation

Pratique et indemnisation du TT

Transport

Prise en charge à 75% du coût et forfait mobilité durable jusqu’à 300€

About the offer

About the CNRS

The CNRS is a major player in fundamental research on a global scale. The CNRS is the only French organization active in all scientific fields. Its unique position as a multi-specialist allows it to bring together different disciplines to address the most important challenges of the contemporary world, in connection with the actors of change.

CNRS

The research professions